diff mbox

[v2,3/6] iommu/amd: Introduce amd_iommu_get_num_iommus()

Message ID 1451672020-2150-4-git-send-email-Suravee.Suthikulpanit@amd.com
State Superseded
Headers show

Commit Message

Suthikulpanit, Suravee Jan. 1, 2016, 6:13 p.m. UTC 
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            | 8 +++++++-
 include/linux/perf/perf_event_amd_iommu.h | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

-- 
1.9.1

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Comments

Suthikulpanit, Suravee Feb. 9, 2016, 10:09 p.m. UTC | #1 
Hi Joerg,

On 01/07/2016 06:15 AM, Joerg Roedel wrote:
> On Fri, Jan 01, 2016 at 12:13:37PM -0600, Suravee Suthikulpanit wrote:

>> +int amd_iommu_get_num_iommus(void)

>> +{

>> +	return amd_iommus_present;

>> +}

>> +EXPORT_SYMBOL(amd_iommu_get_num_iommus);

>

> Is this export needed? The perf code can't be build as a module.

>

> Otherwise it looks good.

>


Right. I am fixing this in V3 and sending out shortly.

Thanks,
Suravee
diff mbox

Patch

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 275c0f5..33dbf3f 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 +2244,12 @@  bool amd_iommu_v2_supported(void)
 }
 EXPORT_SYMBOL(amd_iommu_v2_supported);
 
+int amd_iommu_get_num_iommus(void)
+{
+	return amd_iommus_present;
+}
+EXPORT_SYMBOL(amd_iommu_get_num_iommus);
+
 /****************************************************************************
  *
  * 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);