KVM: PPC: Convert MSR to shared page

[firefly-linux-kernel-4.4.55.git] / arch / powerpc / kvm / book3s.c

diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index b3385dd6f28d0dde4845a88a07dea1f80f633586..2efe69240e1b1e47a62310b8876f8aa019f775f0 100644 (file)
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -115,31 +115,31 @@ static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu)
 
 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
 {
-       vcpu->arch.shadow_msr = vcpu->arch.msr;
+       ulong smsr = vcpu->arch.shared->msr;
+
        /* Guest MSR values */
-       vcpu->arch.shadow_msr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE |
-                                MSR_BE | MSR_DE;
+       smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
        /* Process MSR values */
-       vcpu->arch.shadow_msr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR |
-                                MSR_EE;
+       smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
        /* External providers the guest reserved */
-       vcpu->arch.shadow_msr |= (vcpu->arch.msr & vcpu->arch.guest_owned_ext);
+       smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
        /* 64-bit Process MSR values */
 #ifdef CONFIG_PPC_BOOK3S_64
-       vcpu->arch.shadow_msr |= MSR_ISF | MSR_HV;
+       smsr |= MSR_ISF | MSR_HV;
 #endif
+       vcpu->arch.shadow_msr = smsr;
 }
 
 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 {
-       ulong old_msr = vcpu->arch.msr;
+       ulong old_msr = vcpu->arch.shared->msr;
 
 #ifdef EXIT_DEBUG
        printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
 #endif
 
        msr &= to_book3s(vcpu)->msr_mask;
-       vcpu->arch.msr = msr;
+       vcpu->arch.shared->msr = msr;
        kvmppc_recalc_shadow_msr(vcpu);
 
        if (msr & (MSR_WE|MSR_POW)) {
@@ -149,21 +149,21 @@ void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
                }
        }
 
-       if ((vcpu->arch.msr & (MSR_PR|MSR_IR|MSR_DR)) !=
+       if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
                   (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
                kvmppc_mmu_flush_segments(vcpu);
                kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
        }
 
        /* Preload FPU if it's enabled */
-       if (vcpu->arch.msr & MSR_FP)
+       if (vcpu->arch.shared->msr & MSR_FP)
                kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 }
 
 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 {
        vcpu->arch.srr0 = kvmppc_get_pc(vcpu);
-       vcpu->arch.srr1 = vcpu->arch.msr | flags;
+       vcpu->arch.srr1 = vcpu->arch.shared->msr | flags;
        kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
        vcpu->arch.mmu.reset_msr(vcpu);
 }
@@ -254,11 +254,11 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
 
        switch (priority) {
        case BOOK3S_IRQPRIO_DECREMENTER:
-               deliver = vcpu->arch.msr & MSR_EE;
+               deliver = vcpu->arch.shared->msr & MSR_EE;
                vec = BOOK3S_INTERRUPT_DECREMENTER;
                break;
        case BOOK3S_IRQPRIO_EXTERNAL:
-               deliver = vcpu->arch.msr & MSR_EE;
+               deliver = vcpu->arch.shared->msr & MSR_EE;
                vec = BOOK3S_INTERRUPT_EXTERNAL;
                break;
        case BOOK3S_IRQPRIO_SYSTEM_RESET:
@@ -437,7 +437,7 @@ static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
                         struct kvmppc_pte *pte)
 {
-       int relocated = (vcpu->arch.msr & (data ? MSR_DR : MSR_IR));
+       int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
        int r;
 
        if (relocated) {
@@ -545,8 +545,8 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
        int page_found = 0;
        struct kvmppc_pte pte;
        bool is_mmio = false;
-       bool dr = (vcpu->arch.msr & MSR_DR) ? true : false;
-       bool ir = (vcpu->arch.msr & MSR_IR) ? true : false;
+       bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
+       bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
        u64 vsid;
 
        relocated = data ? dr : ir;
@@ -563,7 +563,7 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
                pte.vpage = eaddr >> 12;
        }
 
-       switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
+       switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
        case 0:
                pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
                break;
@@ -571,7 +571,7 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
        case MSR_IR:
                vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
 
-               if ((vcpu->arch.msr & (MSR_DR|MSR_IR)) == MSR_DR)
+               if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
                        pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
                else
                        pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
@@ -596,14 +596,16 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
                /* Page not found in guest PTE entries */
                vcpu->arch.dear = kvmppc_get_fault_dar(vcpu);
                to_book3s(vcpu)->dsisr = to_svcpu(vcpu)->fault_dsisr;
-               vcpu->arch.msr |= (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
+               vcpu->arch.shared->msr |=
+                       (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
                kvmppc_book3s_queue_irqprio(vcpu, vec);
        } else if (page_found == -EPERM) {
                /* Storage protection */
                vcpu->arch.dear = kvmppc_get_fault_dar(vcpu);
                to_book3s(vcpu)->dsisr = to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
                to_book3s(vcpu)->dsisr |= DSISR_PROTFAULT;
-               vcpu->arch.msr |= (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
+               vcpu->arch.shared->msr |=
+                       (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
                kvmppc_book3s_queue_irqprio(vcpu, vec);
        } else if (page_found == -EINVAL) {
                /* Page not found in guest SLB */
@@ -695,9 +697,11 @@ static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
 
        ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
        if (ret == -ENOENT) {
-               vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 33, 33, 1);
-               vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 34, 36, 0);
-               vcpu->arch.msr = kvmppc_set_field(vcpu->arch.msr, 42, 47, 0);
+               ulong msr = vcpu->arch.shared->msr;
+
+               msr = kvmppc_set_field(msr, 33, 33, 1);
+               msr = kvmppc_set_field(msr, 34, 36, 0);
+               vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
                kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
                return EMULATE_AGAIN;
        }
@@ -736,7 +740,7 @@ static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
        if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
                return RESUME_GUEST;
 
-       if (!(vcpu->arch.msr & msr)) {
+       if (!(vcpu->arch.shared->msr & msr)) {
                kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
                return RESUME_GUEST;
        }
@@ -804,7 +808,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
        if ((exit_nr != 0x900) && (exit_nr != 0x500))
                printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
                        exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
-                       vcpu->arch.msr);
+                       vcpu->arch.shared->msr);
 #endif
        kvm_resched(vcpu);
        switch (exit_nr) {
@@ -836,7 +840,8 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
                        kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
                        r = RESUME_GUEST;
                } else {
-                       vcpu->arch.msr |= to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
+                       vcpu->arch.shared->msr |=
+                               to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
                        kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
                        kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
                        r = RESUME_GUEST;
@@ -904,7 +909,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
 program_interrupt:
                flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
 
-               if (vcpu->arch.msr & MSR_PR) {
+               if (vcpu->arch.shared->msr & MSR_PR) {
 #ifdef EXIT_DEBUG
                        printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
 #endif
@@ -1052,7 +1057,7 @@ int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
        regs->ctr = kvmppc_get_ctr(vcpu);
        regs->lr = kvmppc_get_lr(vcpu);
        regs->xer = kvmppc_get_xer(vcpu);
-       regs->msr = vcpu->arch.msr;
+       regs->msr = vcpu->arch.shared->msr;
        regs->srr0 = vcpu->arch.srr0;
        regs->srr1 = vcpu->arch.srr1;
        regs->pid = vcpu->arch.pid;
@@ -1353,7 +1358,7 @@ int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
        local_irq_enable();
 
        /* Preload FPU if it's enabled */
-       if (vcpu->arch.msr & MSR_FP)
+       if (vcpu->arch.shared->msr & MSR_FP)
                kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
 
        ret = __kvmppc_vcpu_entry(kvm_run, vcpu);