aboutsummaryrefslogtreecommitdiff
path: root/arch/i386/kernel/cpu/amd.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/i386/kernel/cpu/amd.c')
-rw-r--r--arch/i386/kernel/cpu/amd.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c
index 73aeaf5a9d4..4c1ddf2b57c 100644
--- a/arch/i386/kernel/cpu/amd.c
+++ b/arch/i386/kernel/cpu/amd.c
@@ -28,6 +28,22 @@ static void __init init_amd(struct cpuinfo_x86 *c)
int mbytes = num_physpages >> (20-PAGE_SHIFT);
int r;
+#ifdef CONFIG_SMP
+ unsigned long value;
+
+ /* Disable TLB flush filter by setting HWCR.FFDIS on K8
+ * bit 6 of msr C001_0015
+ *
+ * Errata 63 for SH-B3 steppings
+ * Errata 122 for all steppings (F+ have it disabled by default)
+ */
+ if (c->x86 == 15) {
+ rdmsrl(MSR_K7_HWCR, value);
+ value |= 1 << 6;
+ wrmsrl(MSR_K7_HWCR, value);
+ }
+#endif
+
/*
* FIXME: We should handle the K5 here. Set up the write
* range and also turn on MSR 83 bits 4 and 31 (write alloc,