perf/x86/amd: Add IOMMU Performance Counter resource management
Add functionality to check the availability of the AMD IOMMU Performance
Counters and export this functionality to other core drivers, such as in this
case, a perf AMD IOMMU PMU. This feature is not bound to any specific AMD
family/model other than the presence of the IOMMU with P-C enabled.
The AMD IOMMU P-C support static counting only at this time.
Signed-off-by: Steven Kinney <steven.kinney@amd.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1370466709-3212-2-git-send-email-suravee.suthikulpanit@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index 0285a21..e400fbe 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -38,9 +38,6 @@
#define ALIAS_TABLE_ENTRY_SIZE 2
#define RLOOKUP_TABLE_ENTRY_SIZE (sizeof(void *))
-/* Length of the MMIO region for the AMD IOMMU */
-#define MMIO_REGION_LENGTH 0x4000
-
/* Capability offsets used by the driver */
#define MMIO_CAP_HDR_OFFSET 0x00
#define MMIO_RANGE_OFFSET 0x0c
@@ -78,6 +75,10 @@
#define MMIO_STATUS_OFFSET 0x2020
#define MMIO_PPR_HEAD_OFFSET 0x2030
#define MMIO_PPR_TAIL_OFFSET 0x2038
+#define MMIO_CNTR_CONF_OFFSET 0x4000
+#define MMIO_CNTR_REG_OFFSET 0x40000
+#define MMIO_REG_END_OFFSET 0x80000
+
/* Extended Feature Bits */
@@ -507,6 +508,10 @@
/* physical address of MMIO space */
u64 mmio_phys;
+
+ /* physical end address of MMIO space */
+ u64 mmio_phys_end;
+
/* virtual address of MMIO space */
u8 __iomem *mmio_base;
@@ -584,6 +589,10 @@
/* The l2 indirect registers */
u32 stored_l2[0x83];
+
+ /* The maximum PC banks and counters/bank (PCSup=1) */
+ u8 max_banks;
+ u8 max_counters;
};
struct devid_map {