KVM: x86: Move TSC offset writes to common code
Also, ensure that the storing of the offset and the reading of the TSC
are never preempted by taking a spinlock. While the lock is overkill
now, it is useful later in this patch series.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 6056a23..a215153 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -395,6 +395,7 @@
unsigned long irq_sources_bitmap;
s64 kvmclock_offset;
+ spinlock_t tsc_write_lock;
struct kvm_xen_hvm_config xen_hvm_config;
@@ -521,6 +522,8 @@
bool (*has_wbinvd_exit)(void);
+ void (*write_tsc_offset)(struct kvm_vcpu *vcpu, u64 offset);
+
const struct trace_print_flags *exit_reasons_str;
};