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KVM: PPC: Convert DAR to shared page.

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The DAR register contains the address a data page fault occured at. This
register behaves pretty much like a simple data storage register that gets
written to on data faults. There is no hypervisor interaction required on
read or write.

This patch converts all users of the current field to the shared page.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-07-29 14:47:45 +02:00 committed by Avi Kivity
parent d562de48de
commit 5e030186df
7 changed files with 15 additions and 15 deletions
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1
arch/powerpc/include/asm/kvm_host.h
View File

@ -231,7 +231,6 @@ struct kvm_vcpu_arch {
ulong csrr1;
ulong dsrr0;
ulong dsrr1;
ulong dear;
ulong esr;
u32 dec;
u32 decar;

1
arch/powerpc/include/asm/kvm_para.h
View File

@ -23,6 +23,7 @@
#include <linux/types.h>
struct kvm_vcpu_arch_shared {
__u64 dar;
__u64 msr;
__u32 dsisr;
};

14
arch/powerpc/kvm/book3s.c
View File

@ -594,14 +594,14 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
if (page_found == -ENOENT) {
/* Page not found in guest PTE entries */
vcpu->arch.dear = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
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);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dsisr =
to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
@ -610,7 +610,7 @@ int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_book3s_queue_irqprio(vcpu, vec);
} else if (page_found == -EINVAL) {
/* Page not found in guest SLB */
vcpu->arch.dear = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
} else if (!is_mmio &&
kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
@ -867,17 +867,17 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
} else {
vcpu->arch.dear = dar;
vcpu->arch.shared->dar = dar;
vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
kvmppc_mmu_pte_flush(vcpu, vcpu->arch.dear, ~0xFFFUL);
kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL);
r = RESUME_GUEST;
}
break;
}
case BOOK3S_INTERRUPT_DATA_SEGMENT:
if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
vcpu->arch.dear = kvmppc_get_fault_dar(vcpu);
vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
kvmppc_book3s_queue_irqprio(vcpu,
BOOK3S_INTERRUPT_DATA_SEGMENT);
}
@ -997,7 +997,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
kvmppc_get_last_inst(vcpu));
vcpu->arch.dear = kvmppc_alignment_dar(vcpu,
vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
kvmppc_get_last_inst(vcpu));
kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
}

6
arch/powerpc/kvm/book3s_emulate.c
View File

@ -212,7 +212,7 @@ int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
r = kvmppc_st(vcpu, &addr, 32, zeros, true);
if ((r == -ENOENT) || (r == -EPERM)) {
*advance = 0;
vcpu->arch.dear = vaddr;
vcpu->arch.shared->dar = vaddr;
to_svcpu(vcpu)->fault_dar = vaddr;
dsisr = DSISR_ISSTORE;
@ -330,7 +330,7 @@ int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
vcpu->arch.shared->dsisr = spr_val;
break;
case SPRN_DAR:
vcpu->arch.dear = spr_val;
vcpu->arch.shared->dar = spr_val;
break;
case SPRN_HIOR:
to_book3s(vcpu)->hior = spr_val;
@ -443,7 +443,7 @@ int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->dsisr);
break;
case SPRN_DAR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dear);
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->dar);
break;
case SPRN_HIOR:
kvmppc_set_gpr(vcpu, rt, to_book3s(vcpu)->hior);

2
arch/powerpc/kvm/book3s_paired_singles.c
View File

@ -169,7 +169,7 @@ static void kvmppc_inject_pf(struct kvm_vcpu *vcpu, ulong eaddr, bool is_store)
shared->msr = kvmppc_set_field(shared->msr, 33, 36, 0);
shared->msr = kvmppc_set_field(shared->msr, 42, 47, 0);
vcpu->arch.dear = eaddr;
shared->dar = eaddr;
/* Page Fault */
dsisr = kvmppc_set_field(0, 33, 33, 1);
if (is_store)

2
arch/powerpc/kvm/booke.c
View File

@ -195,7 +195,7 @@ static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
if (update_esr == true)
vcpu->arch.esr = vcpu->arch.queued_esr;
if (update_dear == true)
vcpu->arch.dear = vcpu->arch.queued_dear;
vcpu->arch.shared->dar = vcpu->arch.queued_dear;
kvmppc_set_msr(vcpu, vcpu->arch.shared->msr & msr_mask);
clear_bit(priority, &vcpu->arch.pending_exceptions);

4
arch/powerpc/kvm/booke_emulate.c
View File

@ -105,7 +105,7 @@ int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
switch (sprn) {
case SPRN_DEAR:
vcpu->arch.dear = spr_val; break;
vcpu->arch.shared->dar = spr_val; break;
case SPRN_ESR:
vcpu->arch.esr = spr_val; break;
case SPRN_DBCR0:
@ -200,7 +200,7 @@ int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
case SPRN_IVPR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.ivpr); break;
case SPRN_DEAR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.dear); break;
kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->dar); break;
case SPRN_ESR:
kvmppc_set_gpr(vcpu, rt, vcpu->arch.esr); break;
case SPRN_DBCR0: