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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-09-28 16:45:51 +0100 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2010-10-22 21:26:02 +0100 |
| commit | ff12849a7a187e17fcbd888b39850d22103395c6 (patch) | |
| tree | ba7276b8c6afbee0d0a9add10131b55d7444fd98 /arch/x86 | |
| parent | 4fe7d5a708a955b35e3fdc4dea3e0b7a6ae2eb06 (diff) | |
| download | blackbird-op-linux-ff12849a7a187e17fcbd888b39850d22103395c6.tar.gz blackbird-op-linux-ff12849a7a187e17fcbd888b39850d22103395c6.zip | |
xen: mask the MTRR feature from the cpuid
We don't want Linux to think that the cpu supports MTRRs when running
under Xen because MTRR operations could only be performed through
hypercalls.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 9efb00446250..d48a32b10a3c 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -243,6 +243,7 @@ static __init void xen_init_cpuid_mask(void) cpuid_leaf1_edx_mask = ~((1 << X86_FEATURE_MCE) | /* disable MCE */ (1 << X86_FEATURE_MCA) | /* disable MCA */ + (1 << X86_FEATURE_MTRR) | /* disable MTRR */ (1 << X86_FEATURE_ACC)); /* thermal monitoring */ if (!xen_initial_domain()) |
