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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce/AMD: Fix UP build error
  x86: Specify a size for the cmp in the NMI handler
  x86/nmi: Test saved %cs in NMI to determine nested NMI case
  x86/amd: Fix L1i and L2 cache sharing information for AMD family 15h processors
  x86/microcode: Remove noisy AMD microcode warning
This commit is contained in:
Linus Torvalds 2012-02-27 07:55:51 -08:00
commit e25bda5642
4 changed files with 46 additions and 10 deletions
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44
arch/x86/kernel/cpu/intel_cacheinfo.c
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@ -326,8 +326,7 @@ static void __cpuinit amd_calc_l3_indices(struct amd_northbridge *nb)
l3->indices = (max(max3(sc0, sc1, sc2), sc3) << 10) - 1;
}
static void __cpuinit amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf,
int index)
static void __cpuinit amd_init_l3_cache(struct _cpuid4_info_regs *this_leaf, int index)
{
int node;
@ -725,14 +724,16 @@ static DEFINE_PER_CPU(struct _cpuid4_info *, ici_cpuid4_info);
#define CPUID4_INFO_IDX(x, y) (&((per_cpu(ici_cpuid4_info, x))[y]))
#ifdef CONFIG_SMP
static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
static int __cpuinit cache_shared_amd_cpu_map_setup(unsigned int cpu, int index)
{
struct _cpuid4_info *this_leaf, *sibling_leaf;
unsigned long num_threads_sharing;
int index_msb, i, sibling;
struct _cpuid4_info *this_leaf;
int ret, i, sibling;
struct cpuinfo_x86 *c = &cpu_data(cpu);
if ((index == 3) && (c->x86_vendor == X86_VENDOR_AMD)) {
ret = 0;
if (index == 3) {
ret = 1;
for_each_cpu(i, cpu_llc_shared_mask(cpu)) {
if (!per_cpu(ici_cpuid4_info, i))
continue;
@ -743,8 +744,35 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
set_bit(sibling, this_leaf->shared_cpu_map);
}
}
return;
} else if ((c->x86 == 0x15) && ((index == 1) || (index == 2))) {
ret = 1;
for_each_cpu(i, cpu_sibling_mask(cpu)) {
if (!per_cpu(ici_cpuid4_info, i))
continue;
this_leaf = CPUID4_INFO_IDX(i, index);
for_each_cpu(sibling, cpu_sibling_mask(cpu)) {
if (!cpu_online(sibling))
continue;
set_bit(sibling, this_leaf->shared_cpu_map);
}
}
}
return ret;
}
static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
{
struct _cpuid4_info *this_leaf, *sibling_leaf;
unsigned long num_threads_sharing;
int index_msb, i;
struct cpuinfo_x86 *c = &cpu_data(cpu);
if (c->x86_vendor == X86_VENDOR_AMD) {
if (cache_shared_amd_cpu_map_setup(cpu, index))
return;
}
this_leaf = CPUID4_INFO_IDX(cpu, index);
num_threads_sharing = 1 + this_leaf->base.eax.split.num_threads_sharing;

2
arch/x86/kernel/cpu/mcheck/mce_amd.c
View File

@ -528,6 +528,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
sprintf(name, "threshold_bank%i", bank);
#ifdef CONFIG_SMP
if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
i = cpumask_first(cpu_llc_shared_mask(cpu));
@ -553,6 +554,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
goto out;
}
#endif
b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL);
if (!b) {

9
arch/x86/kernel/entry_64.S
View File

@ -1531,11 +1531,18 @@ ENTRY(nmi)
/* Use %rdx as out temp variable throughout */
pushq_cfi %rdx
/*
* If %cs was not the kernel segment, then the NMI triggered in user
* space, which means it is definitely not nested.
*/
cmpl $__KERNEL_CS, 16(%rsp)
jne first_nmi
/*
* Check the special variable on the stack to see if NMIs are
* executing.
*/
cmp $1, -8(%rsp)
cmpl $1, -8(%rsp)
je nested_nmi
/*

1
arch/x86/kernel/microcode_amd.c
View File

@ -360,7 +360,6 @@ out:
static enum ucode_state
request_microcode_user(int cpu, const void __user *buf, size_t size)
{
pr_info("AMD microcode update via /dev/cpu/microcode not supported\n");
return UCODE_ERROR;
}