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| author | Mark Langsdorf <mark.langsdorf@amd.com> | 2009-04-09 15:24:06 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-10 14:22:34 +0200 |
| commit | ba518bea2db21c72d44a6cbfd825b026ef9cdcb6 (patch) | |
| tree | 98891189633ecb48a0d0b1e6d995c3e808c827a3 /arch/x86/kernel/cpu/intel_cacheinfo.c | |
| parent | f8b201fc7110c3673437254e8ba02451461ece0b (diff) | |
x86: cacheinfo: disable L3 ECC scrubbing when L3 cache index is disabled
(Use correct mask to zero out bits 24-28 by Andreas)
Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <20090409132406.GK31527@alberich.amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/cpu/intel_cacheinfo.c')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_cacheinfo.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c index fc28291e40ba..d46a849f44a8 100644 --- a/arch/x86/kernel/cpu/intel_cacheinfo.c +++ b/arch/x86/kernel/cpu/intel_cacheinfo.c @@ -731,6 +731,7 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf, int node = cpu_to_node(cpu); struct pci_dev *dev = node_to_k8_nb_misc(node); unsigned long val = 0; + unsigned int scrubber = 0; if (!this_leaf->can_disable) return -EINVAL; @@ -745,6 +746,11 @@ static ssize_t store_cache_disable(struct _cpuid4_info *this_leaf, return -EINVAL; val |= 0xc0000000; + + pci_read_config_dword(dev, 0x58, &scrubber); + scrubber &= ~0x1f000000; + pci_write_config_dword(dev, 0x58, scrubber); + pci_write_config_dword(dev, 0x1BC + index * 4, val & ~0x40000000); wbinvd(); pci_write_config_dword(dev, 0x1BC + index * 4, val); |