Maciej W. Rozycki [Fri, 13 May 2016 06:20:16 +0000 (07:20 +0100)]
MIPS: ELF: Deconditionalise ABI flags definitions
Move the `mips_elf_abiflags_v0' structure and FP ABI flag macros outside
#ifndef ELF_ARCH. These are public interfaces.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13243/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:32 +0000 (15:50 +0100)]
MIPS: Print GuestCtl1 on machine check exception
The GuestCtl1 CP0 register can contain the GuestID used for root TLB
operations, which affects TLB matching. The other TLB registers are
already dumped out to the log on a machine check exception due to
multiple matching TLB entries, so also dump the value of the GuestCtl1
register if GuestIDs are supported.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13232/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:31 +0000 (15:50 +0100)]
MIPS: dump_tlb: Preserve and dump GuestID
The GuestID for root TLB operations (GuestCtl1.RID) is modified by TLB
reads, so needs preserving by dump_tlb() like the ASID field of EntryHi.
Also dump the GuestID of each entry if it exists alongside the ASID, as
it forms an important part of the TLB entry when VZ guests are used.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13230/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:30 +0000 (15:50 +0100)]
MIPS: Add probing & defs for VZ & guest features
Add a few new cpu-features.h definitions for VZ sub-features, namely the
existence of the CP0_GuestCtl0Ext, CP0_GuestCtl1, and CP0_GuestCtl2
registers, and support for GuestID to dialias TLB entries belonging to
different guests.
Also add certain features present in the guest, with the naming scheme
cpu_guest_has_*. These are added separately to the main options bitfield
since they generally parallel similar features in the root context. A
few of these (FPU, MSA, watchpoints, perf counters, CP0_[X]ContextConfig
registers, MAAR registers, and probably others in future) can be
dynamically configured in the guest context, for which the
cpu_guest_has_dyn_* macros are added.
[ralf@linux-mips.org: Resolve merge conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13231/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:29 +0000 (15:50 +0100)]
MIPS: Add guest CP0 accessors
Add guest CP0 accessors and guest TLB operations along the same lines as
the existing macros and functions for the root CP0.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13229/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:28 +0000 (15:50 +0100)]
MIPS: Add register definitions for VZ ASE registers
Add various register definitions to <asm/mipsregs.h> for the coprocessor
zero registers in the VZ ASE, namely CP0_GuestCtl0, CP0_GuestCtl0Ext,
CP0_GuestCtl1, CP0_GuestCtl2, CP0_GuestCtl3, and CP0_GTOffset.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13228/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 14:50:27 +0000 (15:50 +0100)]
MIPS: Avoid magic numbers probing kscratch_mask
The decode_config4() function reads kscratch_mask from
CP0_Config4.KScrExist using a hard coded shift and mask. We already have
a definition for the mask in mipsregs.h, so add a definition for the
shift and make use of them.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13227/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 12:50:53 +0000 (13:50 +0100)]
MIPS: Add perf counter feature
Add CPU feature for standard MIPS r2 performance counters, as determined
by the Config1.PC bit. Both perf_events and oprofile probe this bit, so
lets combine the probing and change both to use cpu_has_perf.
This will also be used for VZ support in KVM to know whether performance
counters exist which can be exposed to guests.
[ralf@linux-mips.org: resolve conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Robert Richter <rric@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: oprofile-list@lists.sf.net
Patchwork: https://patchwork.linux-mips.org/patch/13226/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 12:50:52 +0000 (13:50 +0100)]
MIPS: Add defs & probing of [X]ContextConfig
The CP0_[X]ContextConfig registers are present if CP0_Config3.CTXTC or
CP0_Config3.SM are set, and provide more control over which bits of
CP0_[X]Context are set to the faulting virtual address on a TLB
exception.
KVM/VZ will need to be able to save and restore these registers in the
guest context, so add the relevant definitions and probing of the
ContextConfig feature in the root context first.
[ralf@linux-mips.org: resolve merge conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13225/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 12:50:51 +0000 (13:50 +0100)]
MIPS: Add defs & probing of BadInstr[P] registers
The optional CP0_BadInstr and CP0_BadInstrP registers are written with
the encoding of the instruction that caused a synchronous exception to
occur, and the prior branch instruction if in a delay slot.
These will be useful for instruction emulation in KVM, and especially
for VZ support where reading guest virtual memory is a bit more awkward.
Add CPU option numbers and cpu_has_* definitions to indicate the
presence of each registers, and add code to probe for them using bits in
the CP0_Config3 register.
[ralf@linux-mips.org: resolve merge conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13224/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 12:50:50 +0000 (13:50 +0100)]
MIPS: Add defs & probing of extended CP0_EBase
The CP0_EBase register may optionally have a write gate (WG) bit to
allow the upper bits to be written, i.e. bits 31:30 on MIPS32 since r3
(to allow for an exception base outside of KSeg0/KSeg1 when segmentation
control is in use) and bits 63:30 on MIPS64 (which also implies the
extension of CP0_EBase to 64 bits long).
The presence of this feature will need to be known about for VZ support
in order to correctly save and restore all the bits of the guest
CP0_EBase register, so add CPU feature definition and probing for this
feature.
Probing the WG bit on MIPS64 can be a bit fiddly, since 64-bit COP0
register access instructions were UNDEFINED for 32-bit registers prior
to MIPS r6, and it'd be nice to be able to probe without clobbering the
existing state, so there are 3 potential paths:
- If we do a 32-bit read of CP0_EBase and the WG bit is already set, the
register must be 64-bit.
- On MIPS r6 we can do a 64-bit read-modify-write to set CP0_EBase.WG,
since the upper bits will read 0 and be ignored on write if the
register is 32-bit.
- On pre-r6 cores, we do a 32-bit read-modify-write of CP0_EBase. This
avoids the potentially UNDEFINED behaviour, but will clobber the upper
32-bits of CP0_EBase if it isn't a simple sign extension (which also
requires us to ensure BEV=1 or modifying the exception base would be
UNDEFINED too). It is hopefully unlikely a bootloader would set up
CP0_EBase to a 64-bit segment and leave WG=0.
[ralf@linux-mips.org: Resolved merge conflict.]
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Tested-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13223/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Wed, 11 May 2016 12:50:49 +0000 (13:50 +0100)]
MIPS: Define & use CP0_EBase bit definitions
Add definitions for the bits & fields in the CP0_EBase register, and use
them from a few different places in arch/mips which hardcoded these
values.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Jayachandran C <jchandra@broadcom.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13222/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Stephen Boyd [Wed, 20 Apr 2016 01:34:37 +0000 (18:34 -0700)]
MIPS: alchemy: Remove CLK_IS_ROOT
This flag is a no-op now (see commit
47b0eeb3dc8a "clk: Deprecate
CLK_IS_ROOT", 2016-02-02) so remove it.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13134/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Stephen Boyd [Wed, 20 Apr 2016 01:33:21 +0000 (18:33 -0700)]
MIPS: ath79: Remove CLK_IS_ROOT
This flag is a no-op now (see commit
47b0eeb3dc8a "clk: Deprecate
CLK_IS_ROOT", 2016-02-02) so remove it.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Antony Pavlov <antonynpavlov@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13133/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Aurelien Jarno [Tue, 10 May 2016 22:50:03 +0000 (00:50 +0200)]
MIPS: Octeon: detect and fix byte swapped initramfs
Octeon machines support running in little endian mode. U-Boot usually
runs in big endian-mode. Therefore the initramfs is loaded in big endian
mode, and the kernel later tries to access it in little endian mode.
This patch fixes that by detecting byte swapped initramfs using either the
CPIO header or the header from standard compression methods, and
byte swaps it if needed. It first checks that the header doesn't match
in the native endianness to avoid false detections. It uses the kernel
decompress library so that we don't have to maintain the list of magics
if some decompression methods are added to the kernel.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13219/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Tue, 9 Feb 2016 20:55:53 +0000 (12:55 -0800)]
MIPS: BMIPS: BMIPS4380 and BMIPS5000 support RIXI
Make BMIPS4380 and BMIPS5000 advertise support for RIXI through
cpu_probe_broadcom(). bmips_cpu_setup() needs to be called shortly after that,
during prom_init() in order to enable the proper Broadcom-specific register to
turn on RIXI and the "rotr" instruction.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jon.fraser@broadcom.com
Cc: pgynther@google.com
Cc: paul.burton@imgtec.com
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12507/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Tue, 9 Feb 2016 20:55:52 +0000 (12:55 -0800)]
MIPS: Move RIXI exception enabling after vendor-specific cpu_probe
Some processors may not have the RIXI bit advertised in the Config3 register,
not being a MIPS32R2 or R6 core, yet, they might be supporting it through a
different way, which is overriden during vendor-specific cpu_probe().
Move the RIXI exceptions enabling after the vendor-specific cpu_probe()
function has had a change to run and override the current CPU's options with
MIPS_CPU_RIXI.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jon.fraser@broadcom.com
Cc: pgynther@google.com
Cc: paul.burton@imgtec.com
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12506/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Tue, 9 Feb 2016 20:55:51 +0000 (12:55 -0800)]
MIPS: Allow RIXI to be used on non-R2 or R6 cores
Some processors, like Broadcom's BMIPS4380 and BMIPS5000 support RIXI and the
"rotr" instruction, which can be used to get a slightly more efficient page
table layout.
Introduce a CONFIG_CPU_HAS_RIXI such that those cores can benefit from this
feature. Perform the conditional check updates where relevant.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jon.fraser@broadcom.com
Cc: pgynther@google.com
Cc: paul.burton@imgtec.com
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12505/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:11 +0000 (09:25 +0100)]
MIPS: mm: Panic if an XPA kernel is run without RIXI
XPA kernels hardcode for the presence of RIXI - the PTE format & its
handling presume RI & XI bits. Make this dependence explicit by panicing
if we run on a system that violates it.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13125/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 19 Apr 2016 08:25:10 +0000 (09:25 +0100)]
MIPS: mm: Don't do MTHC0 if XPA not present
Performing an MTHC0 instruction without XPA being present will trigger a
reserved instruction exception, therefore conditionalise the use of this
instruction when building TLB handlers (build_update_entries()), and in
__update_tlb().
This allows an XPA kernel to run on non XPA hardware without that
instruction implemented, just like it can run on XPA capable hardware
without XPA in use (with the noxpa kernel argument) or with XPA not
configured in hardware.
[paul.burton@imgtec.com:
- Rebase atop other TLB work.
- Add "mm" to subject.
- Handle the __kmap_pgprot case.]
Fixes:
c5b367835cfc ("MIPS: Add support for XPA.")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13124/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:09 +0000 (09:25 +0100)]
MIPS: mm: Simplify build_update_entries
We can simplify build_update_entries by unifying the code for the 36 bit
physical addressing with MIPS32 case with the general case, by using
pte_off_ variables in all cases & handling the trivial
_PAGE_GLOBAL_SHIFT == 0 case in build_convert_pte_to_entrylo. This
leaves XPA as the only special case.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13123/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:08 +0000 (09:25 +0100)]
MIPS: mm: Be more explicit about PTE mode bit handling
The XPA case in iPTE_SW or's in software mode bits to the pte_low value
(which is what actually ends up in the high 32 bits of EntryLo...). It
does this presuming that only bits in the upper 16 bits of the 32 bit
pte_low value will be set. Make this assumption explicit with a BUG_ON.
A similar assumption is made for the hardware mode bits, which are or'd
in with a single ori instruction. Make that assumption explicit with a
BUG_ON too.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13122/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:07 +0000 (09:25 +0100)]
MIPS: mm: Pass scratch register through to iPTE_SW
Rather than hardcode a scratch register for the XPA case in iPTE_SW,
pass one through from the work registers allocated by the caller. This
allows for the XPA path to function correctly regardless of the work
registers in use.
Without doing this there are cases (where KScratch registers are
unavailable) in which iPTE_SW will incorrectly clobber $1 despite it
already being in use for the PTE or PTE pointer.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13121/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 19 Apr 2016 08:25:06 +0000 (09:25 +0100)]
MIPS: mm: Don't clobber $1 on XPA TLB refill
For XPA kernels build_update_entries() uses $1 (at) as a scratch
register, but doesn't arrange for it to be preserved, so it will always
be clobbered by the TLB refill exception. Although this register
normally has a very short lifetime that doesn't cross memory accesses,
TLB refills due to instruction fetches (either on a page boundary or
after preemption) could clobber live data, and its easy to reproduce
the clobber with a little bit of assembler code.
Note that the use of a hardware page table walker will partly mask the
problem, as the TLB refill handler will not always be invoked.
This is fixed by avoiding the use of the extra scratch register. The
pte_high parts (going into the lower half of the EntryLo registers) are
loaded and manipulated separately so as to keep the PTE pointer around
for the other halves (instead of storing in the scratch register), and
the pte_low parts (going into the high half of the EntryLo registers)
are masked with 0x00ffffff using an ext instruction (instead of loading
0x00ffffff into the scratch register and AND'ing).
[paul.burton@imgtec.com:
- Rebase atop other TLB work.
- Use ext instead of an sll, srl sequence.
- Use cpu_has_xpa instead of #ifdefs.
- Modify commit subject to include "mm".]
Fixes:
c5b367835cfc ("MIPS: Add support for XPA.")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13120/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:05 +0000 (09:25 +0100)]
MIPS: mm: Fix MIPS32 36b physical addressing (alchemy, netlogic)
There are 2 distinct cases in which a kernel for a MIPS32 CPU
(CONFIG_CPU_MIPS32=y) may use 64 bit physical addresses
(CONFIG_PHYS_ADDR_T_64BIT=y):
- 36 bit physical addressing as used by RMI Alchemy & Netlogic XLP/XLR
CPUs.
- MIPS32r5 eXtended Physical Addressing (XPA).
These 2 cases are distinct in that they require different behaviour from
the kernel - the EntryLo registers have different formats. Until Linux
v4.1 we only supported the first case, with code conditional upon the 2
aforementioned Kconfig variables being set. Commit
c5b367835cfc ("MIPS:
Add support for XPA.") added support for the second case, but did so by
modifying the code that existed for the first case rather than treating
the 2 cases as distinct. Since the EntryLo registers have different
formats this breaks the 36 bit Alchemy/XLP/XLR case. Fix this by
splitting the 2 cases, with XPA cases now being conditional upon
CONFIG_XPA and the non-XPA case matching the code as it existed prior to
commit
c5b367835cfc ("MIPS: Add support for XPA.").
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reported-by: Manuel Lauss <manuel.lauss@gmail.com>
Tested-by: Manuel Lauss <manuel.lauss@gmail.com>
Fixes:
c5b367835cfc ("MIPS: Add support for XPA.")
Cc: James Hogan <james.hogan@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: David Hildenbrand <dahi@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: stable@vger.kernel.org # v4.1+
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13119/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:04 +0000 (09:25 +0100)]
MIPS: mm: Unify pte_page definition
The same definition for pte_page is duplicated for the MIPS32
PHYS_ADDR_T_64BIT case & the generic case. Unify them by moving a single
definition outside of preprocessor conditionals.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13117/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:03 +0000 (09:25 +0100)]
MIPS: mm: Standardise on _PAGE_NO_READ, drop _PAGE_READ
Ever since support for RI/XI was implemented by commit
6dd9344cfc41
("MIPS: Implement Read Inhibit/eXecute Inhibit") we've had a mixture of
_PAGE_READ & _PAGE_NO_READ bits. Rather than keep both around, switch
away from using _PAGE_READ to determine page presence & instead invert
the use to _PAGE_NO_READ. Wherever we formerly had no definition for
_PAGE_NO_READ, change what was _PAGE_READ to _PAGE_NO_READ. The end
result is that we consistently use _PAGE_NO_READ to determine whether a
page is readable, regardless of whether RI/XI is implemented.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13116/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:02 +0000 (09:25 +0100)]
MIPS: Use enums to make asm/pgtable-bits.h readable
asm/pgtable-bits.h has grown to become an unreadable mess of #ifdef
directives defining bits conditionally upon other bits all at the
preprocessing stage, for no good reason.
Instead of having quite so many #ifdef's, simply use enums to provide
sequential numbering for bit shifts, without having to keep track
manually of what the last bit defined was. Masks are defined separately,
after the shifts, which allows for most of their definitions to be
reused for all systems rather than duplicated.
This patch is not intended to make any behavioural change to the code -
all bits should be used in the same way they were before this patch.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13115/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Tue, 19 Apr 2016 08:25:01 +0000 (09:25 +0100)]
MIPS: Remove redundant asm/pgtable-bits.h inclusions
asm/pgtable-bits.h is included in 2 assembly files and thus has to
ifdef around C code, however nothing defined by the header is used
in either of the assembly files that include it.
Remove the redundant inclusions such that asm/pgtable-bits.h doesn't
need to #ifdef around C code, for cleanliness and in preparation for
later patches which will add more C.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13114/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 19 Apr 2016 08:25:00 +0000 (09:25 +0100)]
MIPS: Fix HTW config on XPA kernel without LPA enabled
The hardware page table walker (HTW) configuration is broken on XPA
kernels where XPA couldn't be enabled (either nohtw or the hardware
doesn't support it). This is because the PWSize.PTEW field (PTE width)
was only set to 8 bytes (an extra shift of 1) in config_htw_params() if
PageGrain.ELPA (enable large physical addressing) is set. On an XPA
kernel though the size of PTEs is fixed at 8 bytes regardless of whether
XPA could actually be enabled.
Fix the initialisation of this field based on sizeof(pte_t) instead.
Fixes:
c5b367835cfc ("MIPS: Add support for XPA.")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Steven J. Hill <sjhill@realitydiluted.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13113/
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 19 Apr 2016 08:24:59 +0000 (09:24 +0100)]
MIPS: Separate XPA CPU feature into LPA and MVH
XPA (eXtended Physical Addressing) should be detected as a combination
of two architectural features:
- Large Physical Address (as per Config3.LPA). With XPA this will be set
on MIPS32r5 cores, but it may also be set for MIPS64r2 cores too.
- MTHC0/MFHC0 instructions (as per Config5.MVH). With XPA this will be
set, but it may also be set in VZ guest context even when Config3.LPA
in the guest context has been cleared by the hypervisor.
As such, XPA is only usable if both bits are set. Update CPU features to
separate these two features, with cpu_has_xpa requiring both to be set.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: Joshua Kinard <kumba@gentoo.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13112/
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:55 +0000 (14:04 +0100)]
MIPS: math-emu: Fix jalr emulation when rd == $0
When emulating a jalr instruction with rd == $0, the code in
isBranchInstr was incorrectly writing to GPR $0 which should actually
always remain zeroed. This would lead to any further instructions
emulated which use $0 operating on a bogus value until the task is next
context switched, at which point the value of $0 in the task context
would be restored to the correct zero by a store in SAVE_SOME. Fix this
by not writing to rd if it is $0.
Fixes:
102cedc32a6e ("MIPS: microMIPS: Floating point support.")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: stable <stable@vger.kernel.org> # v3.10
Patchwork: https://patchwork.linux-mips.org/patch/13160/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:54 +0000 (14:04 +0100)]
MIPS: math-emu: Fix m{add,sub}.s shifts
The code in _sp_maddf (formerly ieee754sp_madd) appears to have been
copied verbatim from ieee754sp_add, and although it's adding the
unpacked "r" & "z" floats it kept using macros that operate on "x" &
"y". This led to the addition being carried out incorrectly on some
mismash of the product, accumulator & multiplicand fields. Typically
this would lead to the assertions "ze == re" & "ze <= SP_EMAX" failing
since ze & re hadn't been operated upon.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Fixes:
e24c3bec3e8e ("MIPS: math-emu: Add support for the MIPS R6 MADDF FPU instruction")
Cc: Adam Buchbinder <adam.buchbinder@gmail.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13159/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:53 +0000 (14:04 +0100)]
MIPS: math-emu: Fix code indentation
A line incrementing the re variable was indented a level too deep in
ieee754dp_mul, making the code unclear to read. Fix the indentation.
This appears to have been copied verbatim along with the rest of the
multiplication code to ieee754dp_maddf, now _dp_maddf, too so fix the
indentation there too.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13158/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:52 +0000 (14:04 +0100)]
MIPS: math-emu: Fix bit-width in ieee754dp_{mul, maddf, msubf} comments
A comment in ieee754dp_mul indicates that the code is about to perform a
32b x 32b multiplication & keep the high 32b of the result. It appears
this was copied from the single-precision multiplication code, since the
code actually goes on to perform a 64b x 64b multiplication & keep the
high 64b of the result. Fix the comment to indicate 64b.
It appears also that this comment was copied verbatim along with the
rest of the multiplication code into ieee754dp_maddf, which has since
been renamed _dp_maddf. Fix the same issue there.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13157/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:51 +0000 (14:04 +0100)]
MIPS: math-emu: Add z argument macros
Introduce macros for handling the "z" argument to maddf & msubf, making
its handling consistent with that of the "x" & "y" arguments rather than
open-coding equivalents.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13156/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:50 +0000 (14:04 +0100)]
MIPS: math-emu: Unify ieee754dp_m{add,sub}f
The code for emulating MIPSr6 madd.d & msub.d instructions has
previously been implemented as 2 different functions, namely
ieee754dp_maddf & ieee754dp_msubf. The difference in behaviour of these
2 instructions is merely the sign of the product, so we can easily share
the code implementing them. Do this for the double precision variant,
removing the original ieee754dp_msubf in favor of reusing the code from
ieee754dp_maddf.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13155/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:49 +0000 (14:04 +0100)]
MIPS: math-emu: Unify ieee754sp_m{add,sub}f
The code for emulating MIPSr6 madd.s & msub.s instructions has
previously been implemented as 2 different functions, namely
ieee754sp_maddf & ieee754sp_msubf. The difference in behaviour of these
2 instructions is merely the sign of the product, so we can easily share
the code implementing them. Do this for the single precision variant,
removing the original ieee754sp_msubf in favor of reusing the code from
ieee754sp_maddf.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13154/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:48 +0000 (14:04 +0100)]
MIPS: math-emu: Emulate MIPSr6 sel.fmt instruction
Add support for emulating the MIPSr6 sel.fmt instruction, which was
previously missing from the FPU emulation code. This instruction selects
its result from 2 possible source registers, based upon bit 0 of the
destination register, and is valid only for S (single) & D (double) data
types.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13153/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:47 +0000 (14:04 +0100)]
MIPS: inst: Declare fsel_op for sel.fmt instruction
Declare the opcode for the MIPSr6 sel.fmt instruction, as fsel_op in
order to match other FP op names.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13152/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:46 +0000 (14:04 +0100)]
MIPS: Fix BC1{EQ,NE}Z return offset calculation
The conditions for branching when emulating the BC1EQZ & BC1NEZ
instructions were backwards, leading to each of those instructions being
treated as the other. Fix this by reversing the conditions, and clear up
the code a little for readability & checkpatch.
Fixes:
c8a34581ec09 ("MIPS: Emulate the BC1{EQ,NE}Z FPU instructions")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13151/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Thu, 21 Apr 2016 13:04:45 +0000 (14:04 +0100)]
MIPS: math-emu: Fix BC1{EQ,NE}Z emulation
The conditions for branching when emulating the BC1EQZ & BC1NEZ
instructions were backwards, leading to each of those instructions being
treated as the other. Fix this by reversing the conditions, and clear up
the code a little for readability & checkpatch.
Fixes:
c909ca718e8f ("MIPS: math-emu: Emulate missing BC1{EQ,NE}Z instructions")
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13150/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Rabin Vincent [Thu, 28 Apr 2016 09:03:09 +0000 (11:03 +0200)]
MIPS: Add support for extending builtin cmdline
Allow the builtin command line to be extended by what the bootloader
passes in. For example, the bootloader can pass specific arguments
depending on the boot mode, and these should override the defaults in
the builtin cmdline.
The default MIPS_CMDLINE_FROM_BOOTLOADER option prepends the
bootloader's cmdline to the builtin cmdline so is not suitable for this
purpose.
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13181/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Rabin Vincent [Thu, 28 Apr 2016 09:03:08 +0000 (11:03 +0200)]
MIPS: Don't add leading spacing to command lines
The leading spaces don't affect functionality but are unnecessary.
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13180/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Fri, 29 Apr 2016 16:29:29 +0000 (17:29 +0100)]
MIPS: genex: Indent delay slots & clean whitespace
Various branches and jumps in noreorder parts of genex.S don't have
their delay slot instructions indented conventionally with the extra
space.
Fix these, as well as various other inconsistent whitespace problems in
this file, such as spaces used after some opcodes instead of a tab.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13196/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Fri, 6 May 2016 13:36:24 +0000 (14:36 +0100)]
MIPS: Support extended ASIDs
Add support for extended ASIDs as determined by the Config4.AE bit.
Since the only supported CPUs known to implement this are Netlogic XLP
and MIPS I6400, select this variable ASID support based upon
CONFIG_CPU_XLP and CONFIG_CPU_MIPSR6.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Jayachandran C. <jchandra@broadcom.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13211/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Fri, 6 May 2016 13:36:23 +0000 (14:36 +0100)]
MIPS: Retrieve ASID masks using function accepting struct cpuinfo_mips
In preparation for supporting variable ASID masks, retrieve ASID masks
using functions in asm/cpu-info.h which accept struct cpuinfo_mips. This
will allow those functions to determine the ASID mask based upon the CPU
in a later patch. This also allows for the r3k & r8k cases to be handled
in Kconfig, which is arguably cleaner than the previous #ifdefs.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13210/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Fri, 6 May 2016 13:36:22 +0000 (14:36 +0100)]
MIPS: KVM/locore.S: Relax noat
Now that the at register ($1) is no longer saved by
__kvm_mips_vcpu_run(), relax the noat assembler directive so that it
only applies around code where at is restored before entering guest, and
saved after exiting guest.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13209/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Fri, 6 May 2016 13:36:21 +0000 (14:36 +0100)]
MIPS: KVM/locore.S: Only preserve callee saved registers
Update __kvm_mips_vcpu_run() to only save and restore callee saved
registers. It is always called using the standard ABIs, so the caller
will preserve any other registers that need preserving.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13208/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Fri, 6 May 2016 13:36:20 +0000 (14:36 +0100)]
MIPS: KVM: Abstract guest ASID mask
In preparation for supporting varied widths of ASID mask in the kernel
in general, switch KVM's guest ASIDs to a new KVM_ENTRYHI_ASID
definition based on the 8-bit MIPS_ENTRYHI_ASID instead of ASID_MASK.
It could potentially be used to support extended guest ASIDs in the
future.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13207/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Fri, 6 May 2016 13:36:19 +0000 (14:36 +0100)]
MIPS: Add & use CP0_EntryHi ASID definitions
Add definitions for the ASID field in CP0_EntryHi (along with the soon
to be used ASIDX field), and use them in a few previously hardcoded
cases.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13205/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Fri, 6 May 2016 13:36:18 +0000 (14:36 +0100)]
MIPS: KVM/locore.S: Don't preserve host ASID around vcpu_run
MIPS KVM uses different ASIDs for guest execution than for the host.
The host ASID is saved on the stack when entering the guest with
__kvm_mips_vcpu_run(), and restored again before returning back to the
caller (exit to userland).
- This does not take into account that pre-emption may have taken place
during that time, which may have started a new ASID cycle and resulted
in that process' ASID being invalidated and reused.
- This does not take into account that the process may have migrated to
a different CPU during that time, with a different ASID assignment
since they are managed per-CPU.
- It is actually redundant, since the host ASID will be restored
correctly by kvm_arch_vcpu_put(), which is called almost immediately
after kvm_arch_vcpu_ioctl_run() returns.
Therefore drop this code from locore.S
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13206/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
John Crispin [Thu, 5 May 2016 07:57:56 +0000 (09:57 +0200)]
MIPS: Change my email address
The old address is no longer valid. Use the my new one instead.
Signed-off-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13201/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
John Crispin [Thu, 5 May 2016 07:57:55 +0000 (09:57 +0200)]
MAINTAINERS: Change my email address
The old address is no longer valid. Use the my new one instead.
Signed-off-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13200/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Burton [Fri, 6 May 2016 12:35:03 +0000 (13:35 +0100)]
MIPS: Implement __arch_bitrev* using bitswap for MIPSr6
Release 6 of the MIPS architecture introduced the bitswap instruction,
which reverses the bits within each byte of a word. Make use of this
instruction to implement the __arch_bitrev* functions, which should be
faster for most MIPSr6 CPUs, reduces code size slightly and allows us to
avoid the lookup table used by the generic implementation, saving 256
bytes in the kernel binary by dropping that.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13204/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Anna-Maria Gleixner [Mon, 2 May 2016 09:00:49 +0000 (11:00 +0200)]
MIPS: Remove no longer needed work_on_cpu() call
Since commit
3b9d6da67e11 ("cpu/hotplug: Fix rollback during error-out
in __cpu_disable()") it is ensured that callbacks of CPU_ONLINE and
CPU_DOWN_PREPARE are processed on the hotplugged CPU. Due to this
work_on_cpu() calls are no longer required.
Replace work_on_cpu() with a direct call of mips_cdmm_bus_up() or
mips_cdmm_bus_down(). Description of those functions are adapted.
Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: rt@linutronix.de
Patchwork: https://patchwork.linux-mips.org/patch/13197/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Sergey Ryazanov [Sat, 30 Aug 2014 02:06:28 +0000 (06:06 +0400)]
MIPS: make PCI_DMA_BUS_IS_PHYS=1 constant
No one of supported MIPS machines has an IOMMU unit, so we can safely define
PCI_DMA_BUS_IS_PHYS = 1. Also remove iommu flag from the pci controller
structure, since it is useless.
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7604/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Leonid Yegoshin [Fri, 15 May 2015 01:34:43 +0000 (18:34 -0700)]
MIPS64: Support of at least 48 bits of SEGBITS
SEGBITS is 40 bits or more, depending on CPU type. Introduces optional
support for 48 bits of application virtual address space. Only 16K and
64K pages are supported.
Enabling will result in a memory overhead of a small number of pages for
small applications. For 64K pages a 3rd level of page tables is required
which has some impact during software TLB refill.
[ralf@linux-mips.org: Fixed things raised in the review of the version
posted and changed kconfig to be a bit more userfriendly.]
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: aleksey.makarov@auriga.com
Cc: james.hogan@imgtec.com
Cc: paul.burton@imgtec.com
Cc: david.daney@cavium.com
Cc: peterz@infradead.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: davidlohr@hp.com
Cc: kirill@shutemov.name
Cc: akpm@linux-foundation.org
Cc: mingo@kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10051/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Leonid Yegoshin [Mon, 19 Oct 2015 18:39:55 +0000 (11:39 -0700)]
MIPS64: signal: Fix o32 sigaction syscall
MIPS32 o32 ABI sigaction() processing on MIPS64 n64 kernel was incorrectly
set to processing aka rt_sigaction() variant only.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: paul.burton@imgtec.com
Cc: richard@nod.at
Cc: luto@amacapital.net
Cc: alex.smith@imgtec.com
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: mpe@ellerman.id.au
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11321/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Leonid Yegoshin [Fri, 20 Nov 2015 01:38:21 +0000 (17:38 -0800)]
MIPS: remove aliasing alignment if HW has antialising support
MIPS hardware may have an antialising support and it works even
page size is small.
Setup a shared memory aliasing mask to page size if hardware has
an antialising support. Big shared memory mask forces a disruption
in page address assignment and that corrupts Android library memory
handling.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: cernekee@gmail.com
Cc: paul.gortmaker@windriver.com
Cc: kumba@gentoo.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11516/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Tony Wu [Fri, 4 Dec 2015 11:41:12 +0000 (19:41 +0800)]
MIPS: traps: remove unused variable
flags is indeed unused.
Signed-off-by: Tony Wu <tung7970@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11699/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 3 Mar 2016 01:45:13 +0000 (09:45 +0800)]
MIPS: Loongson-3: Introduce CONFIG_LOONGSON3_ENHANCEMENT
New Loongson 3 CPU (since Loongson-3A R2, as opposed to Loongson-3A R1,
Loongson-3B R1 and Loongson-3B R2) has many enhancements, such as FTLB,
L1-VCache, EI/DI/Wait/Prefetch instruction, DSP/DSPv2 ASE, User Local
register, Read-Inhibit/Execute-Inhibit, SFB (Store Fill Buffer), Fast
TLB refill support, etc.
This patch introduce a config option, CONFIG_LOONGSON3_ENHANCEMENT, to
enable those enhancements which are not probed at run time. If you want
a generic kernel to run on all Loongson 3 machines, please say 'N'
here. If you want a high-performance kernel to run on new Loongson 3
machines only, please say 'Y' here.
Some additional explanations:
1) SFB locates between core and L1 cache, it causes memory access out
of order, so writel/outl (and other similar functions) need a I/O
reorder barrier.
2) Loongson 3 has a bug that di instruction can not save the irqflag,
so arch_local_irq_save() is modified. Since CPU_MIPSR2 is selected
by CONFIG_LOONGSON3_ENHANCEMENT, generic kernel doesn't use ei/di
at all.
3) CPU_HAS_PREFETCH is selected by CONFIG_LOONGSON3_ENHANCEMENT, so
MIPS_CPU_PREFETCH (used by uasm) probing is also put in this patch.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12755/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 3 Mar 2016 01:45:12 +0000 (09:45 +0800)]
MIPS: Loongson-3: Fast TLB refill handler
Loongson-3A R2 has pwbase/pwfield/pwsize/pwctl registers in CP0 (this
is very similar to HTW) and lwdir/lwpte/lddir/ldpte instructions which
can be used for fast TLB refill.
[ralf@linux-mips.org: Resolve conflict.]
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12754/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 3 Mar 2016 01:45:11 +0000 (09:45 +0800)]
MIPS: Loongson: Invalidate special TLBs when needed
Loongson-2 has a 4 entry itlb which is a subset of jtlb, Loongson-3 has
a 4 entry itlb and a 4 entry dtlb which are subsets of jtlb. We should
write diag register to invalidate itlb/dtlb when flushing jtlb because
itlb/dtlb are not totally transparent to software.
For Loongson-3A R2 (and newer), we should invalidate ITLB, DTLB, VTLB
and FTLB before we enable/disable FTLB.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12753/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 3 Mar 2016 01:45:10 +0000 (09:45 +0800)]
MIPS: Loongson-3: Set cache flush handlers to cache_noop
Loongson-3 maintains cache coherency by hardware, this means:
1) It's icache is coherent with dcache.
2) It's dcaches don't alias (maybe depend on PAGE_SIZE).
3) It maintains cache coherency across cores (and for DMA).
So we can skip most cache flush operations by setting relevant handlers
to `cache_noop' in `r4k_cache_init'.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12752/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 3 Mar 2016 01:45:09 +0000 (09:45 +0800)]
MIPS: Loongson: Add Loongson-3A R2 basic support
Loongson-3 CPU family:
Code-name Brand-name PRId
Loongson-3A R1 Loongson-3A1000 0x6305
Loongson-3A R2 Loongson-3A2000 0x6308
Loongson-3B R1 Loongson-3B1000 0x6306
Loongson-3B R2 Loongson-3B1500 0x6307
Features of R2 revision of Loongson-3A:
- Primary cache includes I-Cache, D-Cache and V-Cache (Victim Cache).
- I-Cache, D-Cache and V-Cache are 16-way set-associative, linesize is
64 bytes.
- 64 entries of VTLB (classic TLB), 1024 entries of FTLB (8-way
set-associative).
- Supports DSP/DSPv2 instructions, UserLocal register and Read-Inhibit/
Execute-Inhibit.
[ralf@linux-mips.org: Resolved merge conflicts.]
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12751/
Patchwork: https://patchwork.linux-mips.org/patch/13136/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Thu, 17 Mar 2016 12:41:07 +0000 (20:41 +0800)]
MIPS: Loongson-3: Adjust irq dispatch to speedup processing
This patch adjust the logic in mach_irq_dispatch(), allow multiple IPs
handled in the same dispatching. This can speedup interrupt processing.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12891/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Wed, 7 Oct 2015 06:08:00 +0000 (14:08 +0800)]
MIPS: Loongson-3: Move chipset ACPI code from drivers to arch
SB700/SB710/SB800 chipset ACPI code is mostly Loongson-3 specific
routines rather than a "platform driver".
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11273/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Antonio Ospite [Wed, 27 Jan 2016 13:56:06 +0000 (14:56 +0100)]
MIPS: BCM1480: bcm1480_regs.h: strip redundant comments
Strip some comments which probably meant to repeat the same value of the
define; they also contained a confusing 0x0x prefix.
Signed-off-by: Antonio Ospite <ao2@ao2.it>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12254/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 1 Mar 2016 22:19:39 +0000 (22:19 +0000)]
MIPS: Add and use watch register field definitions
The files watch.c and ptrace.c contain various magic masks for
WatchLo/WatchHi register fields. Add some definitions to mipsregs.h for
these registers and make use of them in both watch.c and ptrace.c,
hopefully making them more readable.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12729/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Tue, 1 Mar 2016 22:19:38 +0000 (22:19 +0000)]
MIPS: Add and use CAUSEF_WP definition
do_watch() clears bit 22 of cause without using a CAUSEF_* definition
from mipsregs.h. Add a definition for this bit (CAUSEF_WP) and make use
of it. Also use clear_c0_cause() instead of manual read/modify/write.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12728/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Purna Chandra Mandal [Fri, 26 Feb 2016 17:20:22 +0000 (10:20 -0700)]
watchdog: pic32-dmt: Add PIC32 deadman timer driver
Adds support for the deadman timer peripheral found on PIC32 class devices.
The primary function of the deadman timer (DMT) is to reset the processor
in the event of a software malfunction. The DMT is a free-running
instruction fetch timer, which is clocked whenever an instruction fetch
occurs until a count match occurs. Instructions are not fetched when
the processor is in sleep mode.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12703/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Purna Chandra Mandal [Fri, 26 Feb 2016 17:20:21 +0000 (10:20 -0700)]
dt/bindings: Add bindings for PIC32 deadman timer peripheral
Document the devicetree bindings for the deadman timer peripheral found on
Microchip PIC32 SoC class devices.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12702/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Joshua Henderson [Fri, 26 Feb 2016 17:19:28 +0000 (10:19 -0700)]
watchdog: pic32-wdt: Add PIC32 watchdog driver
Add support for the watchdog peripheral found on PIC32 class
devices.
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12701/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Joshua Henderson [Fri, 26 Feb 2016 17:19:27 +0000 (10:19 -0700)]
dt/bindings: Add bindings for PIC32 watchdog peripheral
Document the devicetree bindings for the watchdog peripheral found on
Microchip PIC32 SoC class devices.
Signed-off-by: Joshua Henderson <joshua.henderson@microchip.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Wim Van Sebroeck <wim@iguana.be>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: linux-watchdog@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12700/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Andrzej Hajda [Mon, 15 Feb 2016 14:35:20 +0000 (15:35 +0100)]
MIPS: module: fix incorrect IS_ERR_VALUE macro usages
IS_ERR_VALUE macro should be used only with unsigned long type.
Specifically it works incorrectly with longer types.
The patch follows conclusion from discussion on LKML [1][2].
[1]: http://permalink.gmane.org/gmane.linux.kernel/
2120927
[2]: http://permalink.gmane.org/gmane.linux.kernel/
2150581
[ralf@linux-mips.org: While it may not immediately be obvious, the type
of st_value in the end is an unsigned long equivalent so the invocation
of IS_ERR_VALUE() was valid but I'm applying the patch anyway for
clarity.]
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12553/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Maciej W. Rozycki [Fri, 13 Nov 2015 00:48:48 +0000 (00:48 +0000)]
MIPS: math-emu: Always propagate sNaN payload in quieting
Propagate sNaN payload in quieting in the legacy-NaN mode as well. If
clearing the quiet bit would produce infinity, then set the next lower
trailing significand field bit, matching the SB-1 and BMIPS5000 hardware
implementations. Some other MIPS FPU hardware implementations do
produce the default qNaN bit pattern instead.
This reverts some changes made for semantics preservation with commit
dc3ddf42 [MIPS: math-emu: Update sNaN quieting handlers], consequently
bringing back most of the semantics from before commit
fdffbafb [Lots of
FPU bug fixes from Kjeld Borch Egevang.], except from the qNaN produced
in the infinity case. Previously the default qNaN bit pattern was
produced in that case.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Fortune <Matthew.Fortune@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11483/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Maciej W. Rozycki [Fri, 13 Nov 2015 00:48:39 +0000 (00:48 +0000)]
MIPS: ELF: Restructure personality macros
Update the ELF personality macros used for individual ABIs to make
actions in the same order across all of them and match formatting too.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Fortune <Matthew.Fortune@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Mon, 8 Feb 2016 18:43:51 +0000 (18:43 +0000)]
MIPS: Fix uapi include in exported asm/siginfo.h
Since commit
8cb48fe169dd ("MIPS: Provide correct siginfo_t.si_stime"),
MIPS' uapi/asm/siginfo.h has included uapi/asm-generic/siginfo.h
directly before defining MIPS' struct siginfo, in order to get the
necessary definitions needed for the siginfo struct without the generic
copy_siginfo() hitting compiler errors due to struct siginfo not yet
being defined.
Now that the generic copy_siginfo() is moved out to linux/signal.h we
can safely include asm-generic/siginfo.h before defining the MIPS
specific struct siginfo, which avoids the uapi/ include as well as
breakage due to generic copy_siginfo() being defined before struct
siginfo.
Reported-by: Christopher Ferris <cferris@google.com>
Fixes:
8cb48fe169dd ("MIPS: Provide correct siginfo_t.si_stime")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Petr Malat <oss@malat.biz>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.0-
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
James Hogan [Mon, 8 Feb 2016 18:43:50 +0000 (18:43 +0000)]
SIGNAL: Move generic copy_siginfo() to signal.h
The generic copy_siginfo() is currently defined in
asm-generic/siginfo.h, after including uapi/asm-generic/siginfo.h which
defines the generic struct siginfo. However this makes it awkward for an
architecture to use it if it has to define its own struct siginfo (e.g.
MIPS and potentially IA64), since it means that asm-generic/siginfo.h
can only be included after defining the arch-specific siginfo, which may
be problematic if the arch-specific definition needs definitions from
uapi/asm-generic/siginfo.h.
It is possible to work around this by first including
uapi/asm-generic/siginfo.h to get the constants before defining the
arch-specific siginfo, and include asm-generic/siginfo.h after. However
uapi headers can't be included by other uapi headers, so that first
include has to be in an ifdef __kernel__, with the non __kernel__ case
including the non-UAPI header instead.
Instead of that mess, move the generic copy_siginfo() definition into
linux/signal.h, which allows an arch-specific uapi/asm/siginfo.h to
include asm-generic/siginfo.h and define the arch-specific siginfo, and
for the generic copy_siginfo() to see that arch-specific definition.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Petr Malat <oss@malat.biz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Christopher Ferris <cferris@google.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: <stable@vger.kernel.org> # 4.0-
Patchwork: https://patchwork.linux-mips.org/patch/12478/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Yang Shi [Sat, 20 Feb 2016 01:04:07 +0000 (17:04 -0800)]
MIPS: Octeon: Mark some functions __init in smp.c
octeon_smp_setup and octeon_prepare_cpus are just used during initialization
period, so mark them as __init. And, octeon_prepare_cpus is just used in smp.c,
so make it static as well.
Signed-off-by: Yang Shi <yang.shi@windriver.com>
Cc: david.daney@cavium.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12574/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Álvaro Fernández Rojas [Sat, 9 Apr 2016 10:57:49 +0000 (12:57 +0200)]
MIPS: BMIPS: Improve BCM6368 device tree
- Remove unneeded leds0 alias.
- Switch to bcm6345-l1-intc interrupt controller.
- Use interrupt-controller instead of periph_intc and cpu_intc.
- Add uart1 node.
- Single ohci and ehci nodes.
- Avoid using underscores in node names.
- Rename uart aliases to serial.
- Remove blank line in cpus node.
[ralf@linux-mips.org: fix references in bcm96368mvwg.dts so the file keeps
building.]
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Álvaro Fernández Rojas [Sat, 9 Apr 2016 10:57:48 +0000 (12:57 +0200)]
MIPS: BMIPS: Improve BCM6328 device tree
- Remove unneeded leds0 alias.
- Switch to bcm6345-l1-intc interrupt controller.
- Use interrupt-controller instead of periph_intc and cpu_intc.
- Add uart1, ehci and ohci nodes.
- Refactor syscon and syscon-reboot.
- Avoid using underscores in node names.
- Rename uart aliases to serial.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13043/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Álvaro Fernández Rojas [Sat, 9 Apr 2016 10:57:19 +0000 (12:57 +0200)]
MIPS: BMIPS: Add support for BCM63268
This SoC is very similar to BCM63168 and Broadcom usually refers to them as
BCM63268.
Add BCM63268 and missing BCM63168 to device tree documentation.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13042/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Álvaro Fernández Rojas [Sat, 9 Apr 2016 10:56:48 +0000 (12:56 +0200)]
MIPS: BMIPS: Add device tree example for BCM6358
This adds a device tree example for SFR Neufbox4 (Sercomm version), which
also serves as a real example for brcm,bcm6358-leds.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13041/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Álvaro Fernández Rojas [Sat, 9 Apr 2016 10:56:47 +0000 (12:56 +0200)]
MIPS: BMIPS: Add BCM6358 support
BCM6358 has a shared TLB which conflicts with current SMP support, so it must
be disabled for now.
BCM6358 uses >= 0xfffe0000 addresses for internal registers, which need to be
remapped (by using a simplified version of BRCM63xx ioremap.h).
However, 0xfff80000 is a better address, since it also covers BCM3368, leaving
the possibility to add it in the future.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13040/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Tue, 12 Apr 2016 10:40:19 +0000 (18:40 +0800)]
CPUFREQ: Loongson1: Replace goto out with return in ls1x_cpufreq_probe()
This patch replaces goto out with return in ls1x_cpufreq_probe().
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13056/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Tue, 12 Apr 2016 10:40:18 +0000 (18:40 +0800)]
CPUFREQ: Loongson1: Use devm_kzalloc() instead of global structure
This patch uses devm_kzalloc() instead of global structure.
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13055/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Tue, 12 Apr 2016 10:40:17 +0000 (18:40 +0800)]
CPUFREQ: Loongson1: Use dev_get_platdata() to get platform_data
This patch uses dev_get_platdata() to get the platform_data
instead of referencing it directly.
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13054/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Tue, 12 Apr 2016 10:40:16 +0000 (18:40 +0800)]
CPUFREQ: Loongson1: Replace kzalloc() with kcalloc()
This patch replaces kzalloc() with kcalloc() when allocating
frequency table, and remove unnecessary 'out of memory' message.
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13053/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Tue, 12 Apr 2016 10:40:15 +0000 (18:40 +0800)]
CPUFREQ: Loongson1: Rename the file to loongson1-cpufreq.c
This patch renames the file to loongson1-cpufreq.c,
and also includes some minor updates.
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: linux-pm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13052/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 4 Apr 2016 17:55:38 +0000 (10:55 -0700)]
MIPS: BMIPS: Pretty print BMIPS5200 processor name
Just to ease debugging of multiplatform kernel, make sure we print
"Broadcom BMIPS5200" for the BMIPS5200 implementation instead of
Broadcom BMIPS5000.
Fixes:
68e6a78373a6d ("MIPS: BMIPS: Add PRId for BMIPS5200 (Whirlwind)")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13014/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 4 Apr 2016 17:55:37 +0000 (10:55 -0700)]
MIPS: BMIPS: Add cpu-feature-overrides.h
BMIPS_GENERIC being multiplatform and intended to support BMIPS3200,
BMIPS3300, BMIPS4350, BMIPS4380 and BMIPS5000-class processors, there is
not much more we can put in there since they do not share the same I and
D cache line sizes at all (doubled for every new generation
essentially), some processors have a S-cache, some don't, some have a
FPU, some don't.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13013/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 4 Apr 2016 17:55:36 +0000 (10:55 -0700)]
MIPS: BMIPS: local_r4k___flush_cache_all needs to blast S-cache
local_r4k___flush_cache_all() is missing a special check for BMIPS5000
processors, we need to blast the S-cache, just like other MTI processors
since we have an inclusive cache. We also need an additional __sync() to
make sure this is completed.
Fixes:
d74b0172e4e2c ("MIPS: BMIPS: Add special cache handling in c-r4k.c")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13012/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 4 Apr 2016 17:55:35 +0000 (10:55 -0700)]
MIPS: BMIPS: Clear MIPS_CACHE_ALIASES earlier
BMIPS5000 and BMIPS5200 processor have no D cache aliases, and this is
properly handled by the per-CPU override added at the end of
r4k_cache_init(), the problem is that the output of probe_pcache()
disagrees with that, since this is too late:
Primary instruction cache 32kB, VIPT, 4-way, linesize 64 bytes.
Primary data cache 32kB, 4-way, VIPT, cache aliases, linesize 32 bytes
With the change moved earlier, we now have a consistent output with the
settings we are intending to have:
Primary instruction cache 32kB, VIPT, 4-way, linesize 64 bytes.
Primary data cache 32kB, 4-way, VIPT, no aliases, linesize 32 bytes
Fixes:
d74b0172e4e2c ("MIPS: BMIPS: Add special cache handling in c-r4k.c")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13011/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Mon, 4 Apr 2016 17:55:34 +0000 (10:55 -0700)]
MIPS: BMIPS: BMIPS5000 has I cache filing from D cache
BMIPS5000 and BMIPS52000 processors have their I-cache filling from the
D-cache. Since BMIPS_GENERIC does not provide (yet) a
cpu-feature-overrides.h file, this was not set anywhere, so make sure
the R4K cache detection takes care of that.
Fixes:
d74b0172e4e2c ("MIPS: BMIPS: Add special cache handling in c-r4k.c")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13010/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Wed, 27 Jan 2016 20:13:16 +0000 (12:13 -0800)]
MIPS: BMIPS: Enable partition parser in defconfig
Enable CONFIG_MTD_BCM63XX_PARTS in arch/mips/configs/bmips_be_defconfig
since this is a necessary option to parse the built-in flash partition
table on BMIPS big-endian SoCs (Cable Modem and DSL).
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12256/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Florian Fainelli [Wed, 27 Jan 2016 20:13:15 +0000 (12:13 -0800)]
MIPS: BCM63xx: Enable partition parser in defconfig
Enable CONFIG_MTD_BCM63XX_PARTS in arch/mips/configs/bcm63xx_defconfig
since this is a necessary option to parse the built-in flash partition
table on BCM63xx SoCs.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Brian Norris <computersforpeace@gmail.com>
Cc: cernekee@gmail.com
Cc: jogo@openwrt.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12255/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Wed, 6 Apr 2016 12:34:55 +0000 (20:34 +0800)]
MAINTAINERS: add Loongson1 architecture entry
This patch adds Loongson1 architecture entry.
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-clk@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: dmaengine@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/13034/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Kelvin Cheung [Wed, 6 Apr 2016 12:34:54 +0000 (20:34 +0800)]
MIPS: Loongson1B: Some updates/fixes for LS1B
- Add DMA device
- Add NAND device
- Add GPIO device
- Add LED device
- Update the defconfig and rename it to loongson1b_defconfig
- Fix ioremap size
- Other minor fixes
Signed-off-by: Kelvin Cheung <keguang.zhang@gmail.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Brian Norris <computersforpeace@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-clk@vger.kernel.org
Cc: linux-pm@vger.kernel.org
Cc: dmaengine@vger.kernel.org
Cc: linux-gpio@vger.kernel.org
Cc: linux-mtd@lists.infradead.org
Patchwork: https://patchwork.linux-mips.org/patch/13033/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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