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authorTalons Lee <xin.li@citrix.com>2018-12-10 13:03:00 +0300
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2019-01-14 17:00:32 +0300
commit5268c8f39e0efef81af2aaed160272d9eb507beb (patch)
treee9c2a8520fb79f0dc6f233c6e4e93fae91d5d201 /arch/x86/xen/enlighten_pv.c
parent9f51c05dc41a6d69423e3d03d18eb7ab22f9ec19 (diff)
downloadlinux-5268c8f39e0efef81af2aaed160272d9eb507beb.tar.xz
always clear the X2APIC_ENABLE bit for PV guest
Commit e657fcc clears cpu capability bit instead of using fake cpuid value, the EXTD should always be off for PV guest without depending on cpuid value. So remove the cpuid check in xen_read_msr_safe() to always clear the X2APIC_ENABLE bit. Signed-off-by: Talons Lee <xin.li@citrix.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'arch/x86/xen/enlighten_pv.c')
-rw-r--r--arch/x86/xen/enlighten_pv.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 2f6787fc7106..c54a493e139a 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -898,10 +898,7 @@ static u64 xen_read_msr_safe(unsigned int msr, int *err)
val = native_read_msr_safe(msr, err);
switch (msr) {
case MSR_IA32_APICBASE:
-#ifdef CONFIG_X86_X2APIC
- if (!(cpuid_ecx(1) & (1 << (X86_FEATURE_X2APIC & 31))))
-#endif
- val &= ~X2APIC_ENABLE;
+ val &= ~X2APIC_ENABLE;
break;
}
return val;