x86, cpu: Convert AMD Erratum 400

Convert AMD erratum 400 to the bug infrastructure. Then, retract all
exports for modules since they're not needed now and make the AMD
erratum checking machinery local to amd.c. Use forward declarations to
avoid shuffling too much code around needlessly.

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1363788448-31325-7-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

1 files changed, 16 insertions, 7 deletions

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 85f84e13d2d..9a2a71669c5 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -514,6 +514,8 @@ static void __cpuinit early_init_amd(struct cpuinfo_x86 *c)
 }
 
 static const int amd_erratum_383[];
+static const int amd_erratum_400[];
+static bool cpu_has_amd_erratum(const int *erratum);
 
 static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 {
@@ -734,6 +736,9 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
 			set_cpu_bug(c, X86_BUG_AMD_TLB_MMATCH);
 	}
 
+	if (cpu_has_amd_erratum(amd_erratum_400))
+		set_cpu_bug(c, X86_BUG_AMD_APIC_C1E);
+
 	rdmsr_safe(MSR_AMD64_PATCH_LEVEL, &c->microcode, &dummy);
 }
 
@@ -852,8 +857,7 @@ cpu_dev_register(amd_cpu_dev);
  * AMD_OSVW_ERRATUM() macros. The latter is intended for newer errata that
  * have an OSVW id assigned, which it takes as first argument. Both take a
  * variable number of family-specific model-stepping ranges created by
- * AMD_MODEL_RANGE(). Each erratum also has to be declared as extern const
- * int[] in arch/x86/include/asm/processor.h.
+ * AMD_MODEL_RANGE().
  *
  * Example:
  *
@@ -863,15 +867,22 @@ cpu_dev_register(amd_cpu_dev);
  *			   AMD_MODEL_RANGE(0x10, 0x9, 0x0, 0x9, 0x0));
  */
 
-const int amd_erratum_400[] =
+#define AMD_LEGACY_ERRATUM(...)		{ -1, __VA_ARGS__, 0 }
+#define AMD_OSVW_ERRATUM(osvw_id, ...)	{ osvw_id, __VA_ARGS__, 0 }
+#define AMD_MODEL_RANGE(f, m_start, s_start, m_end, s_end) \
+	((f << 24) | (m_start << 16) | (s_start << 12) | (m_end << 4) | (s_end))
+#define AMD_MODEL_RANGE_FAMILY(range)	(((range) >> 24) & 0xff)
+#define AMD_MODEL_RANGE_START(range)	(((range) >> 12) & 0xfff)
+#define AMD_MODEL_RANGE_END(range)	((range) & 0xfff)
+
+static const int amd_erratum_400[] =
 	AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf),
 			    AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));
-EXPORT_SYMBOL_GPL(amd_erratum_400);
 
 static const int amd_erratum_383[] =
 	AMD_OSVW_ERRATUM(3, AMD_MODEL_RANGE(0x10, 0, 0, 0xff, 0xf));
 
-bool cpu_has_amd_erratum(const int *erratum)
+static bool cpu_has_amd_erratum(const int *erratum)
 {
 	struct cpuinfo_x86 *cpu = __this_cpu_ptr(&cpu_info);
 	int osvw_id = *erratum++;
@@ -912,5 +923,3 @@ bool cpu_has_amd_erratum(const int *erratum)
 
 	return false;
 }
-
-EXPORT_SYMBOL_GPL(cpu_has_amd_erratum);