[Xen-devel] [PATCH 02/13] x86/time.c: Get the correct guest TSC rate in tsc_get_info()

[Haozhong Zhang <haozhong.zhang@xxxxxxxxx>]

When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, the existing tsc_get_info() returns the host TSC rate (cpu_khz)
as the guest TSC rate. However, tsc_set_info() may set the guest TSC
rate of a domain in TSC_MODE_DEFAULT to a value different than the host
TSC rate. In order to keep consistent to tsc_set_info(), this patch make
tsc_get_info() use the value set by tsc_set_info() as the guest TSC
rate.

Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>
---
 xen/arch/x86/time.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c
index a345efb..92dd8a1 100644
--- a/xen/arch/x86/time.c
+++ b/xen/arch/x86/time.c
@@ -1869,7 +1869,7 @@ void tsc_get_info(struct domain *d, uint32_t *tsc_mode,
             break;
         }
         *elapsed_nsec = get_s_time();
-        *gtsc_khz = cpu_khz;
+        *gtsc_khz = d->arch.tsc_khz;
         break;
     case TSC_MODE_PVRDTSCP:
         if ( d->arch.vtsc )
-- 
2.4.8


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