Re: [PATCH v1] kvm/x86: Hyper-V tsc page setup

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On 01/20/2016 05:05 PM, Paolo Bonzini wrote:


On 19/01/2016 08:48, Denis V. Lunev wrote:

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6877b4d7e..93c9e25 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -145,6 +145,7 @@ static inline bool is_error_page(struct page *page)
   #define KVM_REQ_HV_RESET          29
   #define KVM_REQ_HV_EXIT           30
   #define KVM_REQ_HV_STIMER         31
+#define KVM_REQ_HV_TSC_PAGE       32
     #define KVM_REQ_MAX               64

ping

Applied with this change:

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index d7716c6e2752..047c275717d3 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -842,7 +842,7 @@ int kvm_hv_setup_tsc_page(struct kvm_vcpu *vcpu)
  		   tsc_khz, tsc, tsc_scale, tsc_offset);

  	tsc_ref.tsc_sequence++;
-	if (tsc_ref.tsc_sequence == 0)
+	if (tsc_ref.tsc_sequence == 0xFFFFFFFF tsc_ref.tsc_sequence == 0)
"(tsc_ref.tsc_sequence == 0xFFFFFFFF || tsc_ref.tsc_sequence == 0)" ?
  		tsc_ref.tsc_sequence = 1;

  	tsc_ref.tsc_scale = tsc_scale;

and renumbering KVM_REQ_HV_TSC_PAGE from 32 to 31.

Paolo

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