lkml.org 
[lkml]   [2016]   [Feb]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V3 3/5] iommu/amd: Introduce amd_iommu_get_num_iommus()
Date
This patch introduces amd_iommu_get_num_iommus(). Initially, this is
intended to be used by Perf AMD IOMMU driver.

Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
---
drivers/iommu/amd_iommu_init.c | 7 ++++++-
include/linux/perf/perf_event_amd_iommu.h | 2 ++
2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 275c0f5..531b2e1 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1030,7 +1030,7 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)

/* Add IOMMU to internal data structures */
list_add_tail(&iommu->list, &amd_iommu_list);
- iommu->index = amd_iommus_present++;
+ iommu->index = amd_iommus_present++;

if (unlikely(iommu->index >= MAX_IOMMUS)) {
WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n");
@@ -2244,6 +2244,11 @@ bool amd_iommu_v2_supported(void)
}
EXPORT_SYMBOL(amd_iommu_v2_supported);

+int amd_iommu_get_num_iommus(void)
+{
+ return amd_iommus_present;
+}
+
/****************************************************************************
*
* IOMMU EFR Performance Counter support functionality. This code allows
diff --git a/include/linux/perf/perf_event_amd_iommu.h b/include/linux/perf/perf_event_amd_iommu.h
index 815eabb..cb820c2 100644
--- a/include/linux/perf/perf_event_amd_iommu.h
+++ b/include/linux/perf/perf_event_amd_iommu.h
@@ -25,6 +25,8 @@
#define PC_MAX_SPEC_CNTRS 16

/* 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(void);
--
2.5.0
\
 
 \ /
  Last update: 2016-02-10 00:21    [W:0.091 / U:0.892 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site