torvalds-linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-01-11 09:00:12 +00:00

Author	SHA1	Message	Date
Linus Torvalds	97313d6113	IOMU Fixes for Linux v6.19-rc4 Including: - Generic IO-Page-Table code: - Several Kconfig-related build fixes - Fix for when gcc 8.5 on PPC refuses to inline a function from a header file. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEr9jSbILcajRFYWYyK/BELZcBGuMFAmliiDkACgkQK/BELZcB GuNXgQ//ROiKTCUpZj+qin9X3kM/VVgofwHIkE7xhTL0jzV99dv3eLsc9A268dWD c1y1/o9HP3wi/e8ESTUFUXi5OnTJqdoQ1nxQWpBr6xn3si6yNQir4gvqbSvLjcKG keVrIBYUn79yV6FJDUkM5NGcLYIX1gMIFxkj/xjkjlsaCG3z8VoRyW4zb1ZN3tZn R8Mgy7BquRhMbL0NBLn0AkSJgxxHoIiiL0Itdgke00ODkj1yq71e2vbf8X4XU9SJ OGtVCXzC3FxAsdhxpS0mQJqnX9ZN1UjDVzw+/3NJ/+OQPI3lR6KjG6x+v8yk70uf G8kSSCpqHpkInCNXzRPtURDoUM4EsdtHtKtd5VNz8Xuxkcfdie1NeKclNPnRxc7L 7z+vBikZ3G5vvk5wjn/o/sailN4HVGuebBavgNeWKPttaeGig71rbkJ3aUP6C0QH Cdf9rkV/UtJcmI8h4MlFMirw7cRH280hldQj4WWUt0KKta4gMeClII/PXsQOyYB4 BEkwaA8wc8J/W3UWz37UJqlhIYMjJdRwo4WaUjwtS1+Mtudh6wN1YKDQ1hKnNtua 6qza5gN5Zn6Q0TiqHFj0vsxvsTjijhMIqlEdReHeF5W0KDNrYl2Y9rfjk/QpDrYa yZ53ccQMFbEwrVKPM+Mxt1FIuF1aiG5vRneLU3NW7qX80xfIU78= =h82g -----END PGP SIGNATURE----- Merge tag 'iommu-fixes-v6.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux Pull iomu fixes from Joerg Roedel: - several Kconfig-related build fixes - fix for when gcc 8.5 on PPC refuses to inline a function from a header file * tag 'iommu-fixes-v6.19-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: iommupt: Make pt_feature() always_inline iommufd/selftest: Prevent module/builtin conflicts in kconfig iommufd/selftest: Add missing kconfig for DMA_SHARED_BUFFER iommupt: Fix the kunit building	2026-01-10 07:14:40 -10:00
Gao Xiang	7893cc1225	erofs: fix file-backed mounts no longer working on EROFS partitions Sheng Yong reported [1] that Android APEX images didn't work with commit 072a7c7cdbea ("erofs: don't bother with s_stack_depth increasing for now") because "EROFS-formatted APEX file images can be stored within an EROFS-formatted Android system partition." In response, I sent a quick fat-fingered [PATCH v3] to address the report. Unfortunately, the updated condition was incorrect: if (erofs_is_fileio_mode(sbi)) { - sb->s_stack_depth = - file_inode(sbi->dif0.file)->i_sb->s_stack_depth + 1; - if (sb->s_stack_depth > FILESYSTEM_MAX_STACK_DEPTH) { - erofs_err(sb, "maximum fs stacking depth exceeded"); + inode = file_inode(sbi->dif0.file); + if ((inode->i_sb->s_op == &erofs_sops && !sb->s_bdev) \|\| + inode->i_sb->s_stack_depth) { The condition `!sb->s_bdev` is always true for all file-backed EROFS mounts, making the check effectively a no-op. The real fix tested and confirmed by Sheng Yong [2] at that time was [PATCH v3 RESEND], which correctly ensures the following EROFS^2 setup works: EROFS (on a block device) + EROFS (file-backed mount) But sadly I screwed it up again by upstreaming the outdated [PATCH v3]. This patch applies the same logic as the delta between the upstream [PATCH v3] and the real fix [PATCH v3 RESEND]. Reported-by: Sheng Yong <shengyong1@xiaomi.com> Closes: https://lore.kernel.org/r/3acec686-4020-4609-aee4-5dae7b9b0093@gmail.com [1] Fixes: 072a7c7cdbea ("erofs: don't bother with s_stack_depth increasing for now") Link: https://lore.kernel.org/r/243f57b8-246f-47e7-9fb1-27a771e8e9e8@gmail.com [2] Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>	2026-01-10 06:39:20 -10:00
Jason Gunthorpe	6a3d5fda2c	iommupt: Make pt_feature() always_inline gcc 8.5 on powerpc does not automatically inline these functions even though they evaluate to constants in key cases. Since the constant propagation is essential for some code elimination and built-time checks this causes a build failure: ERROR: modpost: "__pt_no_sw_bit" [drivers/iommu/generic_pt/fmt/iommu_amdv1.ko] undefined! Caused by this: if (pts_feature(&pts, PT_FEAT_DMA_INCOHERENT) && !pt_test_sw_bit_acquire(&pts, SW_BIT_CACHE_FLUSH_DONE)) flush_writes_item(&pts); Where pts_feature() evaluates to a constant false. Mark them as __always_inline to force it to evaluate to a constant and trigger the code elimination. Fixes: 7c5b184db714 ("genpt: Generic Page Table base API") Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202512230720.9y9DtWIo-lkp@intel.com/ Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>	2026-01-10 10:50:45 +01:00
Jason Gunthorpe	7adfd68274	iommufd/selftest: Prevent module/builtin conflicts in kconfig The selftest now depends on the AMDv1 page table, however the selftest kconfig itself is just an sub-option of the main IOMMUFD module kconfig. This means it cannot be modular and so kconfig allowed a modular IOMMU_PT_AMDV1 with a built in IOMMUFD. This causes link failures: ld: vmlinux.o: in function `mock_domain_alloc_pgtable.isra.0': selftest.c:(.text+0x12e8ad3): undefined reference to `pt_iommu_amdv1_init' ld: vmlinux.o: in function `BSWAP_SHUFB_CTL': sha1-avx2-asm.o:(.rodata+0xaa36a8): undefined reference to `pt_iommu_amdv1_read_and_clear_dirty' ld: sha1-avx2-asm.o:(.rodata+0xaa36f0): undefined reference to `pt_iommu_amdv1_map_pages' ld: sha1-avx2-asm.o:(.rodata+0xaa36f8): undefined reference to `pt_iommu_amdv1_unmap_pages' ld: sha1-avx2-asm.o:(.rodata+0xaa3720): undefined reference to `pt_iommu_amdv1_iova_to_phys' Adjust the kconfig to disable IOMMUFD_TEST if IOMMU_PT_AMDV1 is incompatible. Fixes: e93d5945ed5b ("iommufd: Change the selftest to use iommupt instead of xarray") Suggested-by: Arnd Bergmann <arnd@arndb.de> Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-kbuild-all/202512210135.freQWpxa-lkp@intel.com/ Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>	2026-01-10 10:40:58 +01:00
Jason Gunthorpe	faa37ff3bf	iommufd/selftest: Add missing kconfig for DMA_SHARED_BUFFER The test doesn't build without it, dma-buf.h does not provide stub functions if it is not enabled. Compilation can fail with: ERROR:root:ld: vmlinux.o: in function `iommufd_test': (.text+0x3b1cdd): undefined reference to `dma_buf_get' ld: (.text+0x3b1d08): undefined reference to `dma_buf_put' ld: (.text+0x3b2105): undefined reference to `dma_buf_export' ld: (.text+0x3b211f): undefined reference to `dma_buf_fd' ld: (.text+0x3b2e47): undefined reference to `dma_buf_move_notify' Add the missing select. Fixes: d2041f1f11dd ("iommufd/selftest: Add some tests for the dmabuf flow") Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>	2026-01-10 10:40:58 +01:00
Jason Gunthorpe	cefd81e76a	iommupt: Fix the kunit building The kunit doesn't work since the below commit made GENERIC_PT unselectable: $ make ARCH=x86_64 O=build_kunit_x86_64 olddefconfig ERROR:root:Not all Kconfig options selected in kunitconfig were in the generated .config. This is probably due to unsatisfied dependencies. Missing: CONFIG_DEBUG_GENERIC_PT=y, CONFIG_IOMMUFD_TEST=y, CONFIG_IOMMU_PT_X86_64=y, CONFIG_GENERIC_PT=y, CONFIG_IOMMU_PT_AMDV1=y, CONFIG_IOMMU_PT_VTDSS=y, CONFIG_IOMMU_PT=y, CONFIG_IOMMU_PT_KUNIT_TEST=y Also remove the unneeded CONFIG_IOMMUFD_TEST reference as the iommupt kunit doesn't interact with iommufd, and it doesn't currently build for the kunit due problems with DMA_SHARED buffer either. Fixes: 01569c216dde ("genpt: Make GENERIC_PT invisible") Fixes: 1dd4187f53c3 ("iommupt: Add a kunit test for Generic Page Table") Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Reviewed-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>	2026-01-10 10:40:57 +01:00

4 changed files with 7 additions and 5 deletions

2

drivers/iommu/generic_pt/.kunitconfig

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 @ -1,4 +1,5 @@
 CONFIG_KUNIT=y
 CONFIG_COMPILE_TEST=y
 CONFIG_GENERIC_PT=y
 CONFIG_DEBUG_GENERIC_PT=y
 CONFIG_IOMMU_PT=y
 @ -11,4 +12,3 @@ CONFIG_IOMMUFD=y
 CONFIG_DEBUG_KERNEL=y
 CONFIG_FAULT_INJECTION=y
 CONFIG_RUNTIME_TESTING_MENU=y
 CONFIG_IOMMUFD_TEST=y

									
										4

drivers/iommu/generic_pt/pt_defs.h
									
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				@ -202,7 +202,7 @@ static inline bool pt_table_install32(struct pt_state *pts, u32 table_entry)

				#define PT_SUPPORTED_FEATURE(feature_nr) (PT_SUPPORTED_FEATURES & BIT(feature_nr))

				static inline bool pt_feature(const struct pt_common *common,

				static __always_inline bool pt_feature(const struct pt_common *common,

							      unsigned int feature_nr)

				{

					if (PT_FORCE_ENABLED_FEATURES & BIT(feature_nr))

				@ -212,7 +212,7 @@ static inline bool pt_feature(const struct pt_common *common,

					return common->features & BIT(feature_nr);

				}

				static inline bool pts_feature(const struct pt_state *pts,

				static __always_inline bool pts_feature(const struct pt_state *pts,

							       unsigned int feature_nr)

				{

					return pt_feature(pts->range->common, feature_nr);

3

drivers/iommu/iommufd/Kconfig

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 @ -41,7 +41,8 @@ config IOMMUFD_TEST
 	depends on DEBUG_KERNEL
 	depends on FAULT_INJECTION
 	depends on RUNTIME_TESTING_MENU
 	depends on IOMMU_PT_AMDV1
 	depends on IOMMU_PT_AMDV1=y || IOMMUFD=IOMMU_PT_AMDV1
 	select DMA_SHARED_BUFFER
 	select IOMMUFD_DRIVER
 	default n
 	help

									
										3

fs/erofs/super.c
									
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				@ -655,7 +655,8 @@ static int erofs_fc_fill_super(struct super_block *sb, struct fs_context *fc)

						 */

						if (erofs_is_fileio_mode(sbi)) {

							inode = file_inode(sbi->dif0.file);

							if ((inode->i_sb->s_op == &erofs_sops && !sb->s_bdev) ||

							if ((inode->i_sb->s_op == &erofs_sops &&

							     !inode->i_sb->s_bdev) ||

							    inode->i_sb->s_stack_depth) {

								erofs_err(sb, "file-backed mounts cannot be applied to stacked fses");

								return -ENOTBLK;

Compare commits

6 Commits

b6151c4e60 ... 97313d6113

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drivers/iommu/generic_pt/.kunitconfig

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4

drivers/iommu/generic_pt/pt_defs.h

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drivers/iommu/iommufd/Kconfig

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fs/erofs/super.c

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Compare commits

6 Commits b6151c4e60 ... 97313d6113

2 drivers/iommu/generic_pt/.kunitconfig Unescape Escape View File

4 drivers/iommu/generic_pt/pt_defs.h Unescape Escape View File

3 drivers/iommu/iommufd/Kconfig Unescape Escape View File

3 fs/erofs/super.c Unescape Escape View File

6 Commits

b6151c4e60 ... 97313d6113

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drivers/iommu/generic_pt/.kunitconfig

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drivers/iommu/generic_pt/pt_defs.h

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drivers/iommu/iommufd/Kconfig

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fs/erofs/super.c

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