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authorLinus Torvalds <torvalds@linux-foundation.org>2008-12-20 11:07:18 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2008-12-20 11:07:18 -0800
commite6a997eda9f76e83b7820b6e71406a43374b9f0f (patch)
tree4450ece27c396a57a64dfd784bd2c08ebe82193d /arch
parent9a1d1035631ad8b3edf301b273c30bdfc75de01e (diff)
parent280a9ca5d0663b185ddc4443052076c29652a328 (diff)
Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86: fix resume (S2R) broken by Intel microcode module, on A110L x86 gart: don't complain if no AMD GART found AMD IOMMU: panic if completion wait loop fails AMD IOMMU: set cmd buffer pointers to zero manually x86: re-enable MCE on secondary CPUS after suspend/resume AMD IOMMU: allocate rlookup_table with __GFP_ZERO
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/amd_iommu.c5
-rw-r--r--arch/x86/kernel/amd_iommu_init.c7
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_64.c3
-rw-r--r--arch/x86/kernel/microcode_core.c19
-rw-r--r--arch/x86/kernel/microcode_intel.c6
-rw-r--r--arch/x86/kernel/pci-gart_64.c4
6 files changed, 30 insertions, 14 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a7b6dec6fc3f..0a60d60ed036 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -235,8 +235,9 @@ static int iommu_completion_wait(struct amd_iommu *iommu)
status &= ~MMIO_STATUS_COM_WAIT_INT_MASK;
writel(status, iommu->mmio_base + MMIO_STATUS_OFFSET);
- if (unlikely((i == EXIT_LOOP_COUNT) && printk_ratelimit()))
- printk(KERN_WARNING "AMD IOMMU: Completion wait loop failed\n");
+ if (unlikely(i == EXIT_LOOP_COUNT))
+ panic("AMD IOMMU: Completion wait loop failed\n");
+
out:
spin_unlock_irqrestore(&iommu->lock, flags);
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 30ae2701b3df..c6cc22815d35 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -427,6 +427,10 @@ static u8 * __init alloc_command_buffer(struct amd_iommu *iommu)
memcpy_toio(iommu->mmio_base + MMIO_CMD_BUF_OFFSET,
&entry, sizeof(entry));
+ /* set head and tail to zero manually */
+ writel(0x00, iommu->mmio_base + MMIO_CMD_HEAD_OFFSET);
+ writel(0x00, iommu->mmio_base + MMIO_CMD_TAIL_OFFSET);
+
iommu_feature_enable(iommu, CONTROL_CMDBUF_EN);
return cmd_buf;
@@ -1074,7 +1078,8 @@ int __init amd_iommu_init(void)
goto free;
/* IOMMU rlookup table - find the IOMMU for a specific device */
- amd_iommu_rlookup_table = (void *)__get_free_pages(GFP_KERNEL,
+ amd_iommu_rlookup_table = (void *)__get_free_pages(
+ GFP_KERNEL | __GFP_ZERO,
get_order(rlookup_table_size));
if (amd_iommu_rlookup_table == NULL)
goto free;
diff --git a/arch/x86/kernel/cpu/mcheck/mce_64.c b/arch/x86/kernel/cpu/mcheck/mce_64.c
index 4b031a4ac856..1c838032fd37 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_64.c
@@ -510,12 +510,9 @@ static void __cpuinit mce_cpu_features(struct cpuinfo_x86 *c)
*/
void __cpuinit mcheck_init(struct cpuinfo_x86 *c)
{
- static cpumask_t mce_cpus = CPU_MASK_NONE;
-
mce_cpu_quirks(c);
if (mce_dont_init ||
- cpu_test_and_set(smp_processor_id(), mce_cpus) ||
!mce_available(c))
return;
diff --git a/arch/x86/kernel/microcode_core.c b/arch/x86/kernel/microcode_core.c
index 82fb2809ce32..c4b5b24e0217 100644
--- a/arch/x86/kernel/microcode_core.c
+++ b/arch/x86/kernel/microcode_core.c
@@ -272,13 +272,18 @@ static struct attribute_group mc_attr_group = {
.name = "microcode",
};
-static void microcode_fini_cpu(int cpu)
+static void __microcode_fini_cpu(int cpu)
{
struct ucode_cpu_info *uci = ucode_cpu_info + cpu;
- mutex_lock(&microcode_mutex);
microcode_ops->microcode_fini_cpu(cpu);
uci->valid = 0;
+}
+
+static void microcode_fini_cpu(int cpu)
+{
+ mutex_lock(&microcode_mutex);
+ __microcode_fini_cpu(cpu);
mutex_unlock(&microcode_mutex);
}
@@ -306,12 +311,16 @@ static int microcode_resume_cpu(int cpu)
* to this cpu (a bit of paranoia):
*/
if (microcode_ops->collect_cpu_info(cpu, &nsig)) {
- microcode_fini_cpu(cpu);
+ __microcode_fini_cpu(cpu);
+ printk(KERN_ERR "failed to collect_cpu_info for resuming cpu #%d\n",
+ cpu);
return -1;
}
- if (memcmp(&nsig, &uci->cpu_sig, sizeof(nsig))) {
- microcode_fini_cpu(cpu);
+ if ((nsig.sig != uci->cpu_sig.sig) || (nsig.pf != uci->cpu_sig.pf)) {
+ __microcode_fini_cpu(cpu);
+ printk(KERN_ERR "cached ucode doesn't match the resuming cpu #%d\n",
+ cpu);
/* Should we look for a new ucode here? */
return 1;
}
diff --git a/arch/x86/kernel/microcode_intel.c b/arch/x86/kernel/microcode_intel.c
index 622dc4a21784..a8e62792d171 100644
--- a/arch/x86/kernel/microcode_intel.c
+++ b/arch/x86/kernel/microcode_intel.c
@@ -155,6 +155,7 @@ static DEFINE_SPINLOCK(microcode_update_lock);
static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
{
struct cpuinfo_x86 *c = &cpu_data(cpu_num);
+ unsigned long flags;
unsigned int val[2];
memset(csig, 0, sizeof(*csig));
@@ -174,11 +175,16 @@ static int collect_cpu_info(int cpu_num, struct cpu_signature *csig)
csig->pf = 1 << ((val[1] >> 18) & 7);
}
+ /* serialize access to the physical write to MSR 0x79 */
+ spin_lock_irqsave(&microcode_update_lock, flags);
+
wrmsr(MSR_IA32_UCODE_REV, 0, 0);
/* see notes above for revision 1.07. Apparent chip bug */
sync_core();
/* get the current revision from MSR 0x8B */
rdmsr(MSR_IA32_UCODE_REV, val[0], csig->rev);
+ spin_unlock_irqrestore(&microcode_update_lock, flags);
+
pr_debug("microcode: collect_cpu_info : sig=0x%x, pf=0x%x, rev=0x%x\n",
csig->sig, csig->pf, csig->rev);
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index ba7ad83e20a8..a35eaa379ff6 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -745,10 +745,8 @@ void __init gart_iommu_init(void)
unsigned long scratch;
long i;
- if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0) {
- printk(KERN_INFO "PCI-GART: No AMD GART found.\n");
+ if (cache_k8_northbridges() < 0 || num_k8_northbridges == 0)
return;
- }
#ifndef CONFIG_AGP_AMD64
no_agp = 1;