Wallclock on Xen is written in the shared_info page.
To that purpose, export kvm_write_wall_clock() and pass on the GPA of
its location to populate the shared_info wall clock data.
Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
---
arch/x86/kvm/x86.c | 2 +-
arch/x86/kvm/x86.h | 1 +
arch/x86/kvm/xen.c | 3 +++
3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 6eb2afaa2af2..31a102b22042 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1418,7 +1418,7 @@ void kvm_set_pending_timer(struct kvm_vcpu *vcpu)
kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
}
-static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
+void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock)
{
int version;
int r;
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index 28406aa1136d..b5f2e66a4c81 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -256,6 +256,7 @@ static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
}
void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
+void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock);
int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c
index b4bd1949656e..879bcfdd7b1d 100644
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -19,6 +19,7 @@ static int kvm_xen_shared_info_init(struct kvm *kvm, gfn_t gfn)
{
struct shared_info *shared_info;
struct page *page;
+ gpa_t gpa = gfn_to_gpa(gfn);
page = gfn_to_page(kvm, gfn);
if (is_error_page(page))
@@ -30,6 +31,8 @@ static int kvm_xen_shared_info_init(struct kvm *kvm, gfn_t gfn)
memset(shared_info, 0, sizeof(struct shared_info));
kvm->arch.xen.shinfo = shared_info;
+ kvm_write_wall_clock(kvm, gpa + offsetof(struct shared_info, wc));
+
kvm_make_all_cpus_request(kvm, KVM_REQ_MASTERCLOCK_UPDATE);
return 0;
}
--
2.11.0
