From: Wanpeng Li Date: Wed, 8 Apr 2015 06:08:14 +0000 (+0800) Subject: kvm: x86: fix x86 eflags fixed bit X-Git-Tag: MMI-PSA29.97-13-9~10342^2~18 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=35fd68a38d574188835110cde2937d18fe9b46dd;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git kvm: x86: fix x86 eflags fixed bit Guest can't be booted w/ ept=0, there is a message dumped as below: If you're running a guest on an Intel machine without unrestricted mode support, the failure can be most likely due to the guest entering an invalid state for Intel VT. For example, the guest maybe running in big real mode which is not supported on less recent Intel processors. EAX=00000011 EBX=f000d2f6 ECX=00006cac EDX=000f8956 ESI=bffbdf62 EDI=00000000 EBP=00006c68 ESP=00006c68 EIP=0000d187 EFL=00000004 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =e000 000e0000 ffffffff 00809300 DPL=0 DS16 [-WA] CS =f000 000f0000 ffffffff 00809b00 DPL=0 CS16 [-RA] SS =0000 00000000 ffffffff 00809300 DPL=0 DS16 [-WA] DS =0000 00000000 ffffffff 00809300 DPL=0 DS16 [-WA] FS =0000 00000000 ffffffff 00809300 DPL=0 DS16 [-WA] GS =0000 00000000 ffffffff 00809300 DPL=0 DS16 [-WA] LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy GDT= 000f6a80 00000037 IDT= 000f6abe 00000000 CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=01 1e b8 6a 2e 0f 01 16 74 6a 0f 20 c0 66 83 c8 01 0f 22 c0 <66> ea 8f d1 0f 00 08 00 b8 10 00 00 00 8e d8 8e c0 8e d0 8e e0 8e e8 89 c8 ff e2 89 c1 b8X X86 eflags bit 1 is fixed set, which means that 1 << 1 is set instead of 1, this patch fix it. Signed-off-by: Wanpeng Li Message-Id: <1428473294-6633-1-git-send-email-wanpeng.li@linux.intel.com> Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index b304728aabe3..630bcb0d7a04 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2033,7 +2033,7 @@ static int emulate_iret_real(struct x86_emulate_ctxt *ctxt) X86_EFLAGS_IF | X86_EFLAGS_DF | X86_EFLAGS_OF | X86_EFLAGS_IOPL | X86_EFLAGS_NT | X86_EFLAGS_RF | X86_EFLAGS_AC | X86_EFLAGS_ID | - X86_EFLAGS_FIXED_BIT; + X86_EFLAGS_FIXED; unsigned long vm86_mask = X86_EFLAGS_VM | X86_EFLAGS_VIF | X86_EFLAGS_VIP; @@ -2072,7 +2072,7 @@ static int emulate_iret_real(struct x86_emulate_ctxt *ctxt) } ctxt->eflags &= ~EFLG_RESERVED_ZEROS_MASK; /* Clear reserved zeros */ - ctxt->eflags |= X86_EFLAGS_FIXED_BIT; + ctxt->eflags |= X86_EFLAGS_FIXED; ctxt->ops->set_nmi_mask(ctxt, false); return rc; @@ -2390,7 +2390,7 @@ static int em_syscall(struct x86_emulate_ctxt *ctxt) ops->get_msr(ctxt, MSR_SYSCALL_MASK, &msr_data); ctxt->eflags &= ~msr_data; - ctxt->eflags |= X86_EFLAGS_FIXED_BIT; + ctxt->eflags |= X86_EFLAGS_FIXED; #endif } else { /* legacy mode */