linux

iv/linux

Author SHA1 Message Date

Author	SHA1	Message	Date
Andy Shevchenko	9ddc348214	iommu/vt-d: Drop the kernel doc annotation Kernel doc validator is unhappy with the following .../perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK' .../perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead Drop kernel doc annotation since the top comment is not in the required format. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210729163538.40101-1-andriy.shevchenko@linux.intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20210818134852.1847070-8-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>	2021-08-19 10:41:08 +02:00
Joerg Roedel	d6a9642bd6	iommu/vt-d: Fix linker error on 32-bit A recent commit broke the build on 32-bit x86. The linker throws these messages: ld: drivers/iommu/intel/perf.o: in function `dmar_latency_snapshot': perf.c:(.text+0x40c): undefined reference to `__udivdi3' ld: perf.c:(.text+0x458): undefined reference to `__udivdi3' The reason are the 64-bit divides in dmar_latency_snapshot(). Use the div_u64() helper function for those. Fixes: `55ee5e67a5` ("iommu/vt-d: Add common code for dmar latency performance monitors") Signed-off-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20210610083120.29224-1-joro@8bytes.org	2021-06-10 10:33:14 +02:00
Lu Baolu	55ee5e67a5	iommu/vt-d: Add common code for dmar latency performance monitors The execution time of some operations is very performance critical, such as cache invalidation and PRQ processing time. This adds some common code to monitor the execution time range of those operations. The interfaces include enabling/disabling, checking status, updating sampling data and providing a common string format for users. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20210520031531.712333-1-baolu.lu@linux.intel.com Link: https://lore.kernel.org/r/20210610020115.1637656-14-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>	2021-06-10 09:06:13 +02:00

Andy Shevchenko

9ddc348214

iommu/vt-d: Drop the kernel doc annotation

Kernel doc validator is unhappy with the following

.../perf.c:16: warning: Function parameter or member 'latency_lock' not described in 'DEFINE_SPINLOCK'
.../perf.c:16: warning: expecting prototype for perf.c(). Prototype was for DEFINE_SPINLOCK() instead

Drop kernel doc annotation since the top comment is not in the required format.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210729163538.40101-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210818134852.1847070-8-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

2021-08-19 10:41:08 +02:00

Joerg Roedel

d6a9642bd6

iommu/vt-d: Fix linker error on 32-bit

A recent commit broke the build on 32-bit x86. The linker throws these
messages:

	ld: drivers/iommu/intel/perf.o: in function `dmar_latency_snapshot':
	perf.c:(.text+0x40c): undefined reference to `__udivdi3'
	ld: perf.c:(.text+0x458): undefined reference to `__udivdi3'

The reason are the 64-bit divides in dmar_latency_snapshot(). Use the
div_u64() helper function for those.

Fixes: 55ee5e67a5 ("iommu/vt-d: Add common code for dmar latency performance monitors")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20210610083120.29224-1-joro@8bytes.org

2021-06-10 10:33:14 +02:00

Lu Baolu

55ee5e67a5

iommu/vt-d: Add common code for dmar latency performance monitors

The execution time of some operations is very performance critical, such
as cache invalidation and PRQ processing time. This adds some common code
to monitor the execution time range of those operations. The interfaces
include enabling/disabling, checking status, updating sampling data and
providing a common string format for users.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210520031531.712333-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210610020115.1637656-14-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

2021-06-10 09:06:13 +02:00

3 Commits