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| author | Glauber Costa <glommer@redhat.com> | 2011-02-01 14:16:40 -0500 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2011-03-17 13:08:28 -0300 |
| commit | 12f9a48f7bf5bfe6620b03028a865f26a10e1fce (patch) | |
| tree | 03062791d7f1c24809bb1bebcd84c3fae4c9b80b | |
| parent | f58c9df78c0360f0eb3852b9cc3a61e689bc2dd1 (diff) | |
| download | linux-stable-12f9a48f7bf5bfe6620b03028a865f26a10e1fce.tar.gz linux-stable-12f9a48f7bf5bfe6620b03028a865f26a10e1fce.tar.bz2 linux-stable-12f9a48f7bf5bfe6620b03028a865f26a10e1fce.zip | |
KVM: x86: release kvmclock page on reset
When a vcpu is reset, kvmclock page keeps being written to this days.
This is wrong and inconsistent: a cpu reset should take it to its
initial state.
Signed-off-by: Glauber Costa <glommer@redhat.com>
CC: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 7faf262ab202..712af904706f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1453,6 +1453,14 @@ static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data) return 0; } +static void kvmclock_reset(struct kvm_vcpu *vcpu) +{ + if (vcpu->arch.time_page) { + kvm_release_page_dirty(vcpu->arch.time_page); + vcpu->arch.time_page = NULL; + } +} + int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) { switch (msr) { @@ -1510,10 +1518,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) break; case MSR_KVM_SYSTEM_TIME_NEW: case MSR_KVM_SYSTEM_TIME: { - if (vcpu->arch.time_page) { - kvm_release_page_dirty(vcpu->arch.time_page); - vcpu->arch.time_page = NULL; - } + kvmclock_reset(vcpu); vcpu->arch.time = data; kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu); @@ -5837,10 +5842,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) { - if (vcpu->arch.time_page) { - kvm_release_page_dirty(vcpu->arch.time_page); - vcpu->arch.time_page = NULL; - } + kvmclock_reset(vcpu); free_cpumask_var(vcpu->arch.wbinvd_dirty_mask); fx_free(vcpu); @@ -5901,6 +5903,8 @@ int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) kvm_make_request(KVM_REQ_EVENT, vcpu); vcpu->arch.apf.msr_val = 0; + kvmclock_reset(vcpu); + kvm_clear_async_pf_completion_queue(vcpu); kvm_async_pf_hash_reset(vcpu); vcpu->arch.apf.halted = false; |