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| author |   Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> | 2017-02-24 02:48:17 -0600 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2017-03-30 09:53:53 +0200 |
| commit | 6b9376e30f42b902260371245f009bc05eb3fdfb (patch) | |
| tree | 70cd6609697c7a84a9f8542c99f5786be0e97230 /arch/x86/events | |
| parent | drivers/iommu/amd: Clean up iommu_pc_get_set_reg() (diff) | |
| download | linux-dev-6b9376e30f42b902260371245f009bc05eb3fdfb.tar.xz linux-dev-6b9376e30f42b902260371245f009bc05eb3fdfb.zip | |
x86/events, drivers/iommu/amd: Introduce amd_iommu_get_num_iommus()
Introduce amd_iommu_get_num_iommus(), which returns the value of
amd_iommus_present. The function is used to replace direct access to the
variable, which is now declared as static.
This function will also be used by AMD IOMMU perf driver.
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/1487926102-13073-6-git-send-email-Suravee.Suthikulpanit@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events')
| -rw-r--r-- | arch/x86/events/amd/iommu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/events/amd/iommu.h b/arch/x86/events/amd/iommu.h index 845d173278e3..5c5c9329e571 100644 --- a/arch/x86/events/amd/iommu.h +++ b/arch/x86/events/amd/iommu.h @@ -28,6 +28,8 @@ #define IOMMU_BASE_DEVID 0x0000 /* amd_iommu_init.c external support functions */ +extern int amd_iommu_get_num_iommus(void); + extern bool amd_iommu_pc_supported(void); extern u8 amd_iommu_pc_get_max_banks(u16 devid); |