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| author | Andy Lutomirski <luto@kernel.org> | 2017-11-02 10:59:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-25 16:26:18 +0300 |
| commit | ebef3548d5777e842acb0ab1bba599643525536c (patch) | |
| tree | 5d569cab4a5631d5db5d1647b8f92a35f6d89d2f /arch/x86/xen | |
| parent | 6ff096cf2bf86824579bdcce3743143f993fbe5c (diff) | |
| download | linux-ebef3548d5777e842acb0ab1bba599643525536c.tar.xz | |
x86/entry/32: Pull the MSR_IA32_SYSENTER_CS update code out of native_load_sp0()
commit bd7dc5a6afac719d8ce4092391eef2c7e83c2a75 upstream.
This causes the MSR_IA32_SYSENTER_CS write to move out of the
paravirt callback. This shouldn't affect Xen PV: Xen already ignores
MSR_IA32_SYSENTER_ESP writes. In any event, Xen doesn't support
vm86() in a useful way.
Note to any potential backporters: This patch won't break lguest, as
lguest didn't have any SYSENTER support at all.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/75cf09fe03ae778532d0ca6c65aa58e66bc2f90c.1509609304.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/xen')
0 files changed, 0 insertions, 0 deletions