Displaying 2 results from an estimated 2 matches for "x86_feature_dscpl".
2013 Mar 12
0
[PATCH] vpmu intel: pass through cpuid bits when BTS is enabled
Hi,
this patch passes the orginal cpuid bits for X86_FEATURE_DTES64
(64-bit DS Area) and X86_FEATURE_DSCPL (CPL Qualified Debug Store) to the
guest when the BTS feature is switched on.
I forgot this when I did this BTS emulation.
Thanks.
Dietmar.
Signed-off-by: Dietmar Hahn <dietmar.hahn@ts.fujitsu.com>
diff -r a6b81234b189 xen/arch/x86/hvm/vmx/vpmu_core2.c
--- a/xen/arch/x86/hvm/vmx/vpmu_cor...
2011 Aug 15
36
expose MWAIT to dom0
...ed_invalid_op(str
__clear_bit(X86_FEATURE_PBE, &d);
__clear_bit(X86_FEATURE_DTES64 % 32, &c);
- if ( !IS_PRIV(current->domain) )
- __clear_bit(X86_FEATURE_MWAIT % 32, &c);
+ __clear_bit(X86_FEATURE_MWAIT % 32, &c);
__clear_bit(X86_FEATURE_DSCPL % 32, &c);
__clear_bit(X86_FEATURE_VMXE % 32, &c);
__clear_bit(X86_FEATURE_SMXE % 32, &c);
[...]
This then brings a problem to Dom0 which thinks underlying CPU
doesn''t report mwait, and thus notify BIOS to use old I/O based method.
Later a trick is integrate...