kvm: x86: drop read_tsc_offset()

The TSC offset can now be read directly from struct kvm_arch_vcpu.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index ddffcfb..32a43a2 100644 (file)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -954,7 +954,6 @@ struct kvm_x86_ops {
 
        bool (*has_wbinvd_exit)(void);
 
-       u64 (*read_tsc_offset)(struct kvm_vcpu *vcpu);
        void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
 
        u64 (*read_l1_tsc)(struct kvm_vcpu *vcpu, u64 host_tsc);

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index db77c1c..8023d53 100644 (file)
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1119,13 +1119,6 @@ static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
        seg->base = 0;
 }
 
-static u64 svm_read_tsc_offset(struct kvm_vcpu *vcpu)
-{
-       struct vcpu_svm *svm = to_svm(vcpu);
-
-       return svm->vmcb->control.tsc_offset;
-}
-
 static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
 {
        struct vcpu_svm *svm = to_svm(vcpu);
@@ -5427,7 +5420,6 @@ static struct kvm_x86_ops svm_x86_ops = {
 
        .has_wbinvd_exit = svm_has_wbinvd_exit,
 
-       .read_tsc_offset = svm_read_tsc_offset,
        .write_tsc_offset = svm_write_tsc_offset,
        .adjust_tsc_offset_guest = svm_adjust_tsc_offset_guest,
        .read_l1_tsc = svm_read_l1_tsc,

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index f9939d0..fe2b144 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2609,11 +2609,6 @@ static u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc)
        return host_tsc + tsc_offset;
 }
 
-static u64 vmx_read_tsc_offset(struct kvm_vcpu *vcpu)
-{
-       return vmcs_read64(TSC_OFFSET);
-}
-
 /*
  * writes 'offset' into guest's timestamp counter offset register
  */
@@ -11286,7 +11281,6 @@ static struct kvm_x86_ops vmx_x86_ops = {
 
        .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
 
-       .read_tsc_offset = vmx_read_tsc_offset,
        .write_tsc_offset = vmx_write_tsc_offset,
        .adjust_tsc_offset_guest = vmx_adjust_tsc_offset_guest,
        .read_l1_tsc = vmx_read_l1_tsc,

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 9a2cc69..b4ae925 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1367,7 +1367,7 @@ static void kvm_track_tsc_matching(struct kvm_vcpu *vcpu)
 
 static void update_ia32_tsc_adjust_msr(struct kvm_vcpu *vcpu, s64 offset)
 {
-       u64 curr_offset = kvm_x86_ops->read_tsc_offset(vcpu);
+       u64 curr_offset = vcpu->arch.tsc_offset;
        vcpu->arch.ia32_tsc_adjust_msr += offset - curr_offset;
 }