Denys Vlasenko a5bbbf37c6 iommu/amd: Do not re-fetch iommu->cmd_buf_tail ... The compiler is not smart enough to realize that iommu->cmd_buf_tail can't be modified across memcpy: 41 8b 45 74 mov 0x74(%r13),%eax # iommu->cmd_buf_tail 44 8d 78 10 lea 0x10(%rax),%r15d # += sizeof(*cmd) 41 81 e7 ff 1f 00 00 and $0x1fff,%r15d # %= CMD_BUFFER_SIZE 49 03 45 68 add 0x68(%r13),%rax # target = iommu->cmd_buf + iommu->cmd_buf_tail 45 89 7d 74 mov %r15d,0x74(%r13) # store to iommu->cmd_buf_tail 49 8b 34 24 mov (%r12),%rsi # memcpy 49 8b 7c 24 08 mov 0x8(%r12),%rdi # memcpy 48 89 30 mov %rsi,(%rax) # memcpy 48 89 78 08 mov %rdi,0x8(%rax) # memcpy 49 8b 55 38 mov 0x38(%r13),%rdx # iommu->mmio_base 41 8b 45 74 mov 0x74(%r13),%eax # redundant load of iommu->cmd_buf_tail ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 89 82 08 20 00 00 mov %eax,0x2008(%rdx) # writel CC: Tom Lendacky <thomas.lendacky@amd.com> CC: Joerg Roedel <jroedel@suse.de> CC: linux-kernel@vger.kernel.org Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>		2019-10-30 10:19:49 +01:00
..
amd_iommu.c	iommu/amd: Do not re-fetch iommu->cmd_buf_tail	2019-10-30 10:19:49 +01:00
amd_iommu.h	iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems	2019-08-23 10:26:48 +02:00
amd_iommu_debugfs.c
amd_iommu_init.c	iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems	2019-08-23 10:26:48 +02:00
amd_iommu_proto.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
amd_iommu_quirks.c	iommu/amd: Override wrong IVRS IOAPIC on Raven Ridge systems	2019-08-23 10:26:48 +02:00
amd_iommu_types.h	iommu/amd: Remove unnecessary locking from AMD iommu driver	2019-10-15 11:31:03 +02:00
amd_iommu_v2.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
arm-smmu-impl.c	iommu/arm-smmu: Make private implementation details static	2019-08-20 10:58:03 +01:00
arm-smmu-v3.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
arm-smmu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
arm-smmu.h	Merge branches 'for-joerg/arm-smmu/smmu-v2' and 'for-joerg/arm-smmu/smmu-v3' into for-joerg/arm-smmu/updates	2019-08-23 15:05:45 +01:00
dma-iommu.c	iommu/dma-iommu: Use the dev->coherent_dma_mask	2019-10-15 11:31:04 +02:00
dmar.c	iommu/vt-d: Add Scalable Mode fault information	2019-09-11 12:36:53 +02:00
exynos-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
fsl_pamu.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266	2019-06-05 17:30:28 +02:00
fsl_pamu.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266	2019-06-05 17:30:28 +02:00
fsl_pamu_domain.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266	2019-06-05 17:30:28 +02:00
fsl_pamu_domain.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 266	2019-06-05 17:30:28 +02:00
hyperv-iommu.c	iommu/hyper-v: Add Hyper-V stub IOMMU driver	2019-02-28 11:12:16 +01:00
intel-iommu-debugfs.c	iommu/vt-d: Correctly check format of page table in debugfs	2019-08-09 17:29:25 +02:00
intel-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
intel-pasid.c	Merge branches 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/omap', 'generic-dma-ops' and 'core' into next	2019-07-04 17:26:48 +02:00
intel-pasid.h	iommu/vt-d: Introduce macros useful for dumping DMAR table	2019-05-27 16:16:09 +02:00
intel-svm.c	iommu/vt-d: Remove global page flush support	2019-09-03 15:01:27 +02:00
intel-trace.c	iommu/vt-d: Add trace events for device dma map/unmap	2019-09-11 12:34:30 +02:00
intel_irq_remapping.c	iommu/vt-d: Fix wrong analysis whether devices share the same bus	2019-08-30 15:47:37 +02:00
io-pgtable-arm-v7s.c	Merge branch 'arm/smmu' into arm/mediatek	2019-08-30 16:12:10 +02:00
io-pgtable-arm.c	iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->tlb_add_page()	2019-07-29 17:22:59 +01:00
io-pgtable.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234	2019-06-19 17:09:07 +02:00
iommu-debugfs.c	iommu: Fix IOMMU debugfs fallout	2019-02-26 11:15:58 +01:00
iommu-sysfs.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
iommu-traces.c
iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
iova.c	iommu/iova: Avoid false sharing on fq_timer_on	2019-08-30 15:21:53 +02:00
ipmmu-vmsa.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
irq_remapping.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
irq_remapping.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333	2019-06-05 17:37:06 +02:00
Kconfig	iommu/amd: Convert AMD iommu driver to the dma-iommu api	2019-10-15 11:31:04 +02:00
Makefile	Merge branches 'arm/omap', 'arm/exynos', 'arm/smmu', 'arm/mediatek', 'arm/qcom', 'arm/renesas', 'x86/amd', 'x86/vt-d' and 'core' into next	2019-09-11 12:39:19 +02:00
msm_iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
msm_iommu.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267	2019-06-05 17:30:29 +02:00
msm_iommu_hw-8xxx.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267	2019-06-05 17:30:29 +02:00
mtk_iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
mtk_iommu.h	iommu/mediatek: Clean up struct mtk_smi_iommu	2019-08-30 15:57:27 +02:00
mtk_iommu_v1.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
of_iommu.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 335	2019-06-05 17:37:06 +02:00
omap-iommu-debug.c	Merge branches 'x86/vt-d', 'x86/amd', 'arm/smmu', 'arm/omap', 'generic-dma-ops' and 'core' into next	2019-07-04 17:26:48 +02:00
omap-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
omap-iommu.h	iommu/omap: add support for late attachment of iommu devices	2019-08-09 17:37:10 +02:00
omap-iopgtable.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
qcom_iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
rockchip-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
s390-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
tegra-gart.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
tegra-smmu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00
virtio-iommu.c	iommu: Add gfp parameter to iommu_ops::map	2019-10-15 11:31:04 +02:00