diff options
| author | Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> | 2017-02-24 02:48:18 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-03-30 09:53:54 +0200 |
| commit | f5863a00e73c432b91e4efe1d68778b4ace6a892 (patch) | |
| tree | 07d20407d1caaf4ec5a2ee0e3d85b0d77707623e /drivers/iommu/amd_iommu_proto.h | |
| parent | 6b9376e30f42b902260371245f009bc05eb3fdfb (diff) | |
x86/events/amd/iommu.c: Modify functions to query max banks and counters
Currently, amd_iommu_pc_get_max_[banks|counters]() use end-point device
ID to locate an IOMMU and check the reported max banks/counters. The
logic assumes that the IOMMU_BASE_DEVID belongs to the first IOMMU, and
uses it to acquire a reference to the first IOMMU, which does not work
on certain systems. Instead, modify the function to take an IOMMU index,
and use it to query the corresponding AMD IOMMU instance.
Currently, hardcode the IOMMU index to 0 since the current AMD IOMMU
perf implementation supports only a single IOMMU. A subsequent patch
will add support for multiple IOMMUs, and will use a proper IOMMU index.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Jörg Rödel <joro@8bytes.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/1487926102-13073-7-git-send-email-Suravee.Suthikulpanit@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/iommu/amd_iommu_proto.h')
| -rw-r--r-- | drivers/iommu/amd_iommu_proto.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h index e8f0710aceb3..cd2257e20c3f 100644 --- a/drivers/iommu/amd_iommu_proto.h +++ b/drivers/iommu/amd_iommu_proto.h @@ -59,8 +59,6 @@ extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev); /* IOMMU Performance Counter functions */ extern bool amd_iommu_pc_supported(void); -extern u8 amd_iommu_pc_get_max_banks(u16 devid); -extern u8 amd_iommu_pc_get_max_counters(u16 devid); extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn, u64 *value, bool is_write); |