From: Joerg Roedel Date: Mon, 18 Apr 2011 09:42:53 +0000 (+0200) Subject: KVM: X86: Update last_guest_tsc in vcpu_put X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7c4c0f4fd5c3e82234c0ab61c7e7ffdb8f3af07b;p=GitHub%2FLineageOS%2Fandroid_kernel_samsung_universal7580.git KVM: X86: Update last_guest_tsc in vcpu_put The last_guest_tsc is used in vcpu_load to adjust the tsc_offset since tsc-scaling is merged. So the last_guest_tsc needs to be updated in vcpu_put instead of the the last_host_tsc. This is fixed with this patch. Reported-by: Jan Kiszka Tested-by: Jan Kiszka Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity --- diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 3e03f37f43e..e50bffcf3cc 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -393,7 +393,6 @@ struct kvm_vcpu_arch { unsigned int hw_tsc_khz; unsigned int time_offset; struct page *time_page; - u64 last_host_tsc; u64 last_guest_tsc; u64 last_kernel_ns; u64 last_tsc_nsec; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b05e3fcce29..6aa137701cd 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2146,7 +2146,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) { kvm_x86_ops->vcpu_put(vcpu); kvm_put_guest_fpu(vcpu); - vcpu->arch.last_host_tsc = native_read_tsc(); + kvm_get_msr(vcpu, MSR_IA32_TSC, &vcpu->arch.last_guest_tsc); } static int is_efer_nx(void)