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| author | Keir Fraser <keir.fraser@citrix.com> | 2009-03-09 08:54:19 +0000 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2009-03-09 08:54:19 +0000 |
| commit | 52699620965db5bd229788223427d4559644b36e (patch) | |
| tree | f15361eef5a4b94b3b1bd4e3d74085687bc62ae7 /tools/libxc/xc_cpuid_x86.c | |
| parent | 6db42837ce7ac8c7028dc8416a11442775af3c45 (diff) | |
| download | xen-52699620965db5bd229788223427d4559644b36e.tar.gz xen-52699620965db5bd229788223427d4559644b36e.tar.bz2 xen-52699620965db5bd229788223427d4559644b36e.zip | |
x86: Mask X86_FEATURE_XSAVE in cpuid leaf 1, ecx, as we don't allow
guests to use it (by setting cr4.OSXSAVE).
This prevents crashes in pvops kernels, as new versions of Linux
try to use this feature.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
Diffstat (limited to 'tools/libxc/xc_cpuid_x86.c')
| -rw-r--r-- | tools/libxc/xc_cpuid_x86.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c index d75fe2b013..f9ef0de10b 100644 --- a/tools/libxc/xc_cpuid_x86.c +++ b/tools/libxc/xc_cpuid_x86.c @@ -311,6 +311,7 @@ static void xc_cpuid_pv_policy( clear_bit(X86_FEATURE_XTPR, regs[2]); clear_bit(X86_FEATURE_PDCM, regs[2]); clear_bit(X86_FEATURE_DCA, regs[2]); + clear_bit(X86_FEATURE_XSAVE, regs[2]); set_bit(X86_FEATURE_HYPERVISOR, regs[2]); break; case 0x80000001: |