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authorDave Jones <davej@codemonkey.org.uk>2008-03-26 12:09:16 -0400
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:41:31 +0200
commit0e03eb86b51b21054aea01ada1d03e9c2265dd20 (patch)
treee1681847d9ce7c7a2613dfe75d98c4023fb0d007 /arch/x86/vdso
parentaa040b2f0693695ae393cd9b8a93055952dbf76f (diff)
downloadop-kernel-dev-0e03eb86b51b21054aea01ada1d03e9c2265dd20.zip
op-kernel-dev-0e03eb86b51b21054aea01ada1d03e9c2265dd20.tar.gz
x86: Centaur Isaiah processor to use sysenter in 64-bit compatibility mode rather than syscall
Upcoming 64 bit processors from Centaur can use sysenter. Signed-off-by: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Jesse Ahrens <jahrens@centtech.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/vdso')
-rw-r--r--arch/x86/vdso/vdso32-setup.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index f7e78d8..e2af8ee 100644
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -210,8 +210,12 @@ static int use_sysenter __read_mostly = -1;
/* May not be __init: called during resume */
void syscall32_cpu_init(void)
{
- if (use_sysenter < 0)
- use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL);
+ if (use_sysenter < 0) {
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ use_sysenter = 1;
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_CENTAUR)
+ use_sysenter = 1;
+ }
/* Load these always in case some future AMD CPU supports
SYSENTER from compat mode too. */
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