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authorMarcelo Tosatti <mtosatti@redhat.com>2012-02-03 15:43:55 -0200
committerAvi Kivity <avi@redhat.com>2012-03-08 14:10:07 +0200
commitf1e2b26003c41e581243c09ceed7567677449468 (patch)
tree9c6dc330959815651611bf9636c401ba24cd6cd9
parent6f526ec5383dcd5fa5ffc7b3ac1d62099a0b46ad (diff)
KVM: Allow adjust_tsc_offset to be in host or guest cycles
Redefine the API to take a parameter indicating whether an adjustment is in host or guest cycles. Signed-off-by: Zachary Amsden <zamsden@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
-rw-r--r--arch/x86/include/asm/kvm_host.h13
-rw-r--r--arch/x86/kvm/svm.c6
-rw-r--r--arch/x86/kvm/vmx.c2
-rw-r--r--arch/x86/kvm/x86.c2
4 files changed, 19 insertions, 4 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index b23682900f41..dd439f13df84 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -646,7 +646,7 @@ struct kvm_x86_ops {
u64 (*get_mt_mask)(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio);
int (*get_lpage_level)(void);
bool (*rdtscp_supported)(void);
- void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment);
+ void (*adjust_tsc_offset)(struct kvm_vcpu *vcpu, s64 adjustment, bool host);
void (*set_tdp_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
@@ -676,6 +676,17 @@ struct kvm_arch_async_pf {
extern struct kvm_x86_ops *kvm_x86_ops;
+static inline void adjust_tsc_offset_guest(struct kvm_vcpu *vcpu,
+ s64 adjustment)
+{
+ kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, false);
+}
+
+static inline void adjust_tsc_offset_host(struct kvm_vcpu *vcpu, s64 adjustment)
+{
+ kvm_x86_ops->adjust_tsc_offset(vcpu, adjustment, true);
+}
+
int kvm_mmu_module_init(void);
void kvm_mmu_module_exit(void);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index e12026e5244e..0b7690ee20bd 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -1016,10 +1016,14 @@ static void svm_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
mark_dirty(svm->vmcb, VMCB_INTERCEPTS);
}
-static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
+static void svm_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ WARN_ON(adjustment < 0);
+ if (host)
+ adjustment = svm_scale_tsc(vcpu, adjustment);
+
svm->vmcb->control.tsc_offset += adjustment;
if (is_guest_mode(vcpu))
svm->nested.hsave->control.tsc_offset += adjustment;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e6bf61fa1c03..575fb742a6fc 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1856,7 +1856,7 @@ static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
}
}
-static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment)
+static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
{
u64 offset = vmcs_read64(TSC_OFFSET);
vmcs_write64(TSC_OFFSET, offset + adjustment);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 39a57dac884a..3b931302fa55 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1116,7 +1116,7 @@ static int kvm_guest_time_update(struct kvm_vcpu *v)
if (vcpu->tsc_catchup) {
u64 tsc = compute_guest_tsc(v, kernel_ns);
if (tsc > tsc_timestamp) {
- kvm_x86_ops->adjust_tsc_offset(v, tsc - tsc_timestamp);
+ adjust_tsc_offset_guest(v, tsc - tsc_timestamp);
tsc_timestamp = tsc;
}
}