diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-11 19:15:52 -0800 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2014-05-19 07:54:23 +0200 |
| commit | 00659c4e9ddd25ac81c2ce1490dd0d2b12ff1f1e (patch) | |
| tree | 27ea875dd14c608f4107e315592bb94062dd0622 /drivers | |
| parent | b3dc3e65760a6e83e7b028d11620b9c9fa30982e (diff) | |
x86, fpu, amd: Clear exceptions in AMD FXSAVE workaround
Before we do an EMMS in the AMD FXSAVE information leak workaround we
need to clear any pending exceptions, otherwise we trap with a
floating-point exception inside this code.
Reported-by: halfdog <me@halfdog.net>
Tested-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/CA%2B55aFxQnY_PCG_n4=0w-VG=YLXL-yr7oMxyy0WU2gCBAf3ydg@mail.gmail.com
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
(cherry picked from commit 26bef1318adc1b3a530ecc807ef99346db2aa8b0)
[wt: in 2.6.32, patch applies to arch/x86/include/asm/i387.h. There's
no static_cpu_has() so we use boot_cpu_has() like other kernels do
with gcc3.
]
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions