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authorAndi Kleen <ak@suse.de>2007-05-02 21:27:20 +0400
committerAndi Kleen <andi@basil.nowhere.org>2007-05-02 21:27:20 +0400
commitc7f81c9453375d6416658995eafd3397cb9bba1d (patch)
tree44e018745a0b7c12b127eb54106f2f0c2bb5a570 /arch/i386/Kconfig.cpu
parent484ad393659f20d784a3a93613fb3fd3d9f171fa (diff)
downloadlinux-c7f81c9453375d6416658995eafd3397cb9bba1d.tar.xz
[PATCH] i386: Verify important CPUID bits in real mode
Check some CPUID bits that are needed for compiler generated early in boot. When the system is still in real mode before changing the VESA BIOS mode it is possible to still display an visible error message on the screen. Similar to x86-64. Includes cleanups from Eric Biederman Signed-off-by: Andi Kleen <ak@suse.de>
Diffstat (limited to 'arch/i386/Kconfig.cpu')
-rw-r--r--arch/i386/Kconfig.cpu22
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/i386/Kconfig.cpu b/arch/i386/Kconfig.cpu
index b1af9f50a143..dce6124cb842 100644
--- a/arch/i386/Kconfig.cpu
+++ b/arch/i386/Kconfig.cpu
@@ -240,14 +240,19 @@ config X86_L1_CACHE_SHIFT
default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
default "6" if MK7 || MK8 || MPENTIUMM || MCORE2 || MVIAC7
+config X86_XADD
+ bool
+ depends on !M386
+ default y
+
config RWSEM_GENERIC_SPINLOCK
bool
- depends on M386
+ depends on !X86_XADD
default y
config RWSEM_XCHGADD_ALGORITHM
bool
- depends on !M386
+ depends on X86_XADD
default y
config ARCH_HAS_ILOG2_U32
@@ -331,3 +336,16 @@ config X86_TSC
bool
depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MVIAC7 || MGEODEGX1 || MGEODE_LX || MCORE2) && !X86_NUMAQ
default y
+
+# this should be set for all -march=.. options where the compiler
+# generates cmov.
+config X86_CMOV
+ bool
+ depends on (MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MVIAC3_2 || MVIAC7)
+ default y
+
+config X86_MINIMUM_CPU_MODEL
+ int
+ default "4" if X86_XADD || X86_CMPXCHG || X86_BSWAP
+ default "0"
+