From: Paul Mackerras Date: Sat, 28 Mar 2015 03:21:04 +0000 (+1100) Subject: KVM: PPC: Book3S HV: Minor cleanups X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1f09c3ed86287d40fef90611cbbee055313f52cf;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git KVM: PPC: Book3S HV: Minor cleanups * Remove unused kvmppc_vcore::n_busy field. * Remove setting of RMOR, since it was only used on PPC970 and the PPC970 KVM support has been removed. * Don't use r1 or r2 in setting the runlatch since they are conventionally reserved for other things; use r0 instead. * Streamline the code a little and remove the ext_interrupt_to_host label. * Add some comments about register usage. * hcall_try_real_mode doesn't need to be global, and can't be called from C code anyway. Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 2f339ff9b851..3eecd8868b01 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -227,7 +227,6 @@ struct kvm_arch { unsigned long host_sdr1; int tlbie_lock; unsigned long lpcr; - unsigned long rmor; unsigned long vrma_slb_v; int hpte_setup_done; u32 hpt_order; @@ -271,7 +270,6 @@ struct kvm_arch { */ struct kvmppc_vcore { int n_runnable; - int n_busy; int num_threads; int entry_exit_count; int n_woken; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 3fea721f0da5..92ec3fcb3415 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -505,7 +505,6 @@ int main(void) DEFINE(KVM_NEED_FLUSH, offsetof(struct kvm, arch.need_tlb_flush.bits)); DEFINE(KVM_ENABLED_HCALLS, offsetof(struct kvm, arch.enabled_hcalls)); DEFINE(KVM_LPCR, offsetof(struct kvm, arch.lpcr)); - DEFINE(KVM_RMOR, offsetof(struct kvm, arch.rmor)); DEFINE(KVM_VRMA_SLB_V, offsetof(struct kvm, arch.vrma_slb_v)); DEFINE(VCPU_DSISR, offsetof(struct kvm_vcpu, arch.shregs.dsisr)); DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar)); diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index b06fe53fd509..f8267e5b3a50 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -245,9 +245,9 @@ kvm_novcpu_exit: kvm_start_guest: /* Set runlatch bit the minute you wake up from nap */ - mfspr r1, SPRN_CTRLF - ori r1, r1, 1 - mtspr SPRN_CTRLT, r1 + mfspr r0, SPRN_CTRLF + ori r0, r0, 1 + mtspr SPRN_CTRLT, r0 ld r2,PACATOC(r13) @@ -493,11 +493,9 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) cmpwi r0,0 beq 20b - /* Set LPCR and RMOR. */ + /* Set LPCR. */ 10: ld r8,VCORE_LPCR(r5) mtspr SPRN_LPCR,r8 - ld r8,KVM_RMOR(r9) - mtspr SPRN_RMOR,r8 isync /* Check if HDEC expires soon */ @@ -1075,7 +1073,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) bne 2f mfspr r3,SPRN_HDEC cmpwi r3,0 - bge ignore_hdec + mr r4,r9 + bge fast_guest_return 2: /* See if this is an hcall we can handle in real mode */ cmpwi r12,BOOK3S_INTERRUPT_SYSCALL @@ -1083,26 +1082,21 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) /* External interrupt ? */ cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL - bne+ ext_interrupt_to_host + bne+ guest_exit_cont /* External interrupt, first check for host_ipi. If this is * set, we know the host wants us out so let's do it now */ bl kvmppc_read_intr cmpdi r3, 0 - bgt ext_interrupt_to_host + bgt guest_exit_cont /* Check if any CPU is heading out to the host, if so head out too */ ld r5, HSTATE_KVM_VCORE(r13) lwz r0, VCORE_ENTRY_EXIT(r5) cmpwi r0, 0x100 - bge ext_interrupt_to_host - - /* Return to guest after delivering any pending interrupt */ mr r4, r9 - b deliver_guest_interrupt - -ext_interrupt_to_host: + blt deliver_guest_interrupt guest_exit_cont: /* r9 = vcpu, r12 = trap, r13 = paca */ /* Save more register state */ @@ -1763,8 +1757,10 @@ kvmppc_hisi: * Returns to the guest if we handle it, or continues on up to * the kernel if we can't (i.e. if we don't have a handler for * it, or if the handler returns H_TOO_HARD). + * + * r5 - r8 contain hcall args, + * r9 = vcpu, r10 = pc, r11 = msr, r12 = trap, r13 = paca */ - .globl hcall_try_real_mode hcall_try_real_mode: ld r3,VCPU_GPR(R3)(r9) andi. r0,r11,MSR_PR @@ -2024,10 +2020,6 @@ hcall_real_table: .globl hcall_real_table_end hcall_real_table_end: -ignore_hdec: - mr r4,r9 - b fast_guest_return - _GLOBAL(kvmppc_h_set_xdabr) andi. r0, r5, DABRX_USER | DABRX_KERNEL beq 6f @@ -2066,7 +2058,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) li r3, 0 blr -_GLOBAL(kvmppc_h_cede) +_GLOBAL(kvmppc_h_cede) /* r3 = vcpu pointer, r11 = msr, r13 = paca */ ori r11,r11,MSR_EE std r11,VCPU_MSR(r3) li r0,1 @@ -2148,9 +2140,9 @@ _GLOBAL(kvmppc_h_cede) * runlatch bit before napping. */ kvm_do_nap: - mfspr r2, SPRN_CTRLF - clrrdi r2, r2, 1 - mtspr SPRN_CTRLT, r2 + mfspr r0, SPRN_CTRLF + clrrdi r0, r0, 1 + mtspr SPRN_CTRLT, r0 li r0,1 stb r0,HSTATE_HWTHREAD_REQ(r13) @@ -2282,13 +2274,14 @@ machine_check_realmode: /* * Check the reason we woke from nap, and take appropriate action. - * Returns: + * Returns (in r3): * 0 if nothing needs to be done * 1 if something happened that needs to be handled by the host * -1 if there was a guest wakeup (IPI) * * Also sets r12 to the interrupt vector for any interrupt that needs * to be handled now by the host (0x500 for external interrupt), or zero. + * Modifies r0, r6, r7, r8. */ kvmppc_check_wake_reason: mfspr r6, SPRN_SRR1 @@ -2324,6 +2317,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) * 0 if no interrupt is pending * 1 if an interrupt is pending that needs to be handled by the host * -1 if there was a guest wakeup IPI (which has now been cleared) + * Modifies r0, r6, r7, r8, returns value in r3. */ kvmppc_read_intr: /* see if a host IPI is pending */