On Tue, Feb 16, 2010 at 03:02:46PM +0100, Ingo Molnar wrote:
> Also, there's a typo in the changelog: s/Isntanbul/Istanbul
--
From: Borislav Petkov <borislav.petkov@xxxxxxx>
Date: Thu, 4 Feb 2010 12:09:07 +0100
Subject: [PATCH 1/2] x86, cacheinfo: Remove NUMA dependency, fix for Fam10h, rev.D1
The show/store_cache_disable routines depend unnecessarily on NUMA's
cpu_to_node and the disabling of cache indices broke when !CONFIG_NUMA.
Remove that dependency by using a helper which is always correct.
While at it, enable L3 Cache Index disable on revD1 Istanbuls which
sport the feature too.
Signed-off-by: Borislav Petkov <borislav.petkov@xxxxxxx>
---
arch/x86/kernel/cpu/intel_cacheinfo.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 589b705..be5f5c2 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -327,7 +327,7 @@ amd_check_l3_disable(int index, struct _cpuid4_info_regs *this_leaf)
/* see errata #382 and #388 */
if ((boot_cpu_data.x86 == 0x10) &&
- ((boot_cpu_data.x86_model < 0x9) ||
+ ((boot_cpu_data.x86_model < 0x8) ||
(boot_cpu_data.x86_mask < 0x1)))
return;
@@ -744,7 +744,7 @@ static ssize_t show_cache_disable(struct _cpuid4_info *this_leaf, char *buf,
unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
- int node = cpu_to_node(cpu);
+ int node = amd_get_nb_id(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned int reg = 0;
@@ -771,7 +771,7 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf,
const char *buf, size_t count, unsigned int index)
{
int cpu = cpumask_first(to_cpumask(this_leaf->shared_cpu_map));
- int node = cpu_to_node(cpu);
+ int node = amd_get_nb_id(cpu);
struct pci_dev *dev = node_to_k8_nb_misc(node);
unsigned long val = 0;
--
1.6.4.2
--
Regards/Gruss,
Boris.
--
Advanced Micro Devices, Inc.
Operating Systems Research Center
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