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| author | Paolo Bonzini | 2016-02-24 11:07:14 +0100 |
|---|---|---|
| committer | Paolo Bonzini | 2016-03-08 12:33:26 +0100 |
| commit | 1f50f1b3a4630966fb3cd1f56892acb03580bd37 (patch) | |
| tree | c885d06890ff0b9f68ffad158ad269abaeb39776 /arch/x86/kvm/mmu.c | |
| parent | KVM: MMU: cleanup __kvm_sync_page and its callers (diff) | |
| download | kernel-qcow2-linux-1f50f1b3a4630966fb3cd1f56892acb03580bd37.tar.gz kernel-qcow2-linux-1f50f1b3a4630966fb3cd1f56892acb03580bd37.tar.xz kernel-qcow2-linux-1f50f1b3a4630966fb3cd1f56892acb03580bd37.zip | |
KVM: MMU: invert return value of mmu.sync_page and *kvm_sync_page*
Return true if the page was synced (and the TLB must be flushed)
and false if the page was zapped.
Reviewed-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 31 |
1 files changed, 14 insertions, 17 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 88a1a79c869e..1c87102efb3d 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1784,7 +1784,7 @@ static void mark_unsync(u64 *spte) static int nonpaging_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) { - return 1; + return 0; } static void nonpaging_invlpg(struct kvm_vcpu *vcpu, gva_t gva) @@ -1916,20 +1916,20 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm, if ((_sp)->role.direct || (_sp)->role.invalid) {} else /* @sp->gfn should be write-protected at the call site */ -static int __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, - struct list_head *invalid_list) +static bool __kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, + struct list_head *invalid_list) { if (sp->role.cr4_pae != !!is_pae(vcpu)) { kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list); - return 1; + return false; } - if (vcpu->arch.mmu.sync_page(vcpu, sp)) { + if (vcpu->arch.mmu.sync_page(vcpu, sp) == 0) { kvm_mmu_prepare_zap_page(vcpu->kvm, sp, invalid_list); - return 1; + return false; } - return 0; + return true; } static void kvm_mmu_flush_or_zap(struct kvm_vcpu *vcpu, @@ -1947,14 +1947,14 @@ static void kvm_mmu_flush_or_zap(struct kvm_vcpu *vcpu, kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu); } -static int kvm_sync_page_transient(struct kvm_vcpu *vcpu, - struct kvm_mmu_page *sp) +static bool kvm_sync_page_transient(struct kvm_vcpu *vcpu, + struct kvm_mmu_page *sp) { LIST_HEAD(invalid_list); int ret; ret = __kvm_sync_page(vcpu, sp, &invalid_list); - kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, !ret); + kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, ret); return ret; } @@ -1966,7 +1966,7 @@ static void kvm_mmu_audit(struct kvm_vcpu *vcpu, int point) { } static void mmu_audit_disable(void) { } #endif -static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, +static bool kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp, struct list_head *invalid_list) { kvm_unlink_unsync_page(vcpu->kvm, sp); @@ -1985,8 +1985,7 @@ static void kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn) continue; WARN_ON(s->role.level != PT_PAGE_TABLE_LEVEL); - if (!kvm_sync_page(vcpu, s, &invalid_list)) - flush = true; + flush |= kvm_sync_page(vcpu, s, &invalid_list); } kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush); @@ -2084,9 +2083,7 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu, kvm_flush_remote_tlbs(vcpu->kvm); for_each_sp(pages, sp, parents, i) { - if (!kvm_sync_page(vcpu, sp, &invalid_list)) - flush = true; - + flush |= kvm_sync_page(vcpu, sp, &invalid_list); mmu_pages_clear_parents(&parents); } kvm_mmu_flush_or_zap(vcpu, &invalid_list, false, flush); @@ -2145,7 +2142,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, if (sp->role.word != role.word) continue; - if (sp->unsync && kvm_sync_page_transient(vcpu, sp)) + if (sp->unsync && !kvm_sync_page_transient(vcpu, sp)) break; if (sp->unsync_children) |