Roger Pau Monne
2013-Dec-13 17:16 UTC
[PATCH v2] pvh: disable MTRR feature on cpuid for Dom0
MTRR is not available for PVH Dom0, so prevent cpuid from reporting it as an available feature. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> Cc: George Dunlap <george.dunlap@eu.citrix.com> Cc: Mukesh Rathor <mukesh.rathor@oracle.com> Cc: Jan Beulich <JBeulich@suse.com> Cc: Keir Fraser <keir@xen.org> --- This should go in after Mukesh Dom0 series, or merged into it. --- xen/arch/x86/traps.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c index 940bc33..3f7a3c7 100644 --- a/xen/arch/x86/traps.c +++ b/xen/arch/x86/traps.c @@ -796,6 +796,8 @@ void pv_cpuid(struct cpu_user_regs *regs) __clear_bit(X86_FEATURE_DS, &d); __clear_bit(X86_FEATURE_ACC, &d); __clear_bit(X86_FEATURE_PBE, &d); + if ( is_pvh_vcpu(current) ) + __clear_bit(X86_FEATURE_MTRR, &d); __clear_bit(X86_FEATURE_DTES64 % 32, &c); __clear_bit(X86_FEATURE_MWAIT % 32, &c); -- 1.7.7.5 (Apple Git-26) _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel