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Diffstat (limited to 'arch/i386/kernel/microcode.c')
-rw-r--r--arch/i386/kernel/microcode.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/i386/kernel/microcode.c b/arch/i386/kernel/microcode.c
index a77c612aad0..165f13158c6 100644
--- a/arch/i386/kernel/microcode.c
+++ b/arch/i386/kernel/microcode.c
@@ -164,7 +164,8 @@ static void collect_cpu_info (void *unused)
}
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
- __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
+ /* see notes above for revision 1.07. Apparent chip bug */
+ serialize_cpu();
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], uci->rev);
pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
@@ -377,7 +378,9 @@ static void do_update_one (void * unused)
(unsigned long) uci->mc->bits >> 16 >> 16);
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
- __asm__ __volatile__ ("cpuid" : : : "ax", "bx", "cx", "dx");
+ /* see notes above for revision 1.07. Apparent chip bug */
+ serialize_cpu();
+
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], val[1]);