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xen/bootup: allow read_tscp call for Xen PV guests. 

The hypervisor will trap it. However without this patch,
we would crash as the .read_tscp is set to NULL. This patch
fixes it and sets it to the native_read_tscp call.

CC: stable@vger.kernel.org
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2012-10-10 13:30:47 -04:00
parent 34b6f01a79
commit cd0608e71e
1 changed files with 2 additions and 0 deletions
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2
arch/x86/xen/enlighten.c
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@ -1164,6 +1164,8 @@ static const struct pv_cpu_ops xen_cpu_ops __initconst = {
.read_tsc = native_read_tsc,
.read_pmc = native_read_pmc,
.read_tscp = native_read_tscp,
.iret = xen_iret,
.irq_enable_sysexit = xen_sysexit,
#ifdef CONFIG_X86_64