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authorIngo Molnar <mingo@kernel.org>2015-03-24 14:41:37 +0100
committerIngo Molnar <mingo@kernel.org>2015-03-24 20:57:25 +0100
commitd56fe4bf5f3cc30d455c80520f7b71da36ae00e6 (patch)
tree387fd11f1700ccdabc517ec0a6d75d4d64fb30fc /block
parent84f53788458c95309b88948b69ff95921e9c74a8 (diff)
x86/asm/entry/64: Always set up SYSENTER MSRs
On CONFIG_IA32_EMULATION=y kernels we set up MSR_IA32_SYSENTER_CS/ESP/EIP, but on !CONFIG_IA32_EMULATION kernels we leave them unchanged. Clear them to make sure the instruction is disabled properly. SYSCALL is set up properly in both cases. Acked-by: Denys Vlasenko <dvlasenk@redhat.com> Acked-by: Andy Lutomirski <luto@amacapital.net> Cc: Alexei Starovoitov <ast@plumgrid.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Kees Cook <keescook@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Will Drewry <wad@chromium.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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