#
726e2d0c |
| 19-Sep-2024 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- support DMA zones for arm64 systems where memory starts
Merge tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- support DMA zones for arm64 systems where memory starts at > 4GB (Baruch Siach, Catalin Marinas)
- support direct calls into dma-iommu and thus obsolete dma_map_ops for many common configurations (Leon Romanovsky)
- add DMA-API tracing (Sean Anderson)
- remove the not very useful return value from various dma_set_* APIs (Christoph Hellwig)
- misc cleanups and minor optimizations (Chen Y, Yosry Ahmed, Christoph Hellwig)
* tag 'dma-mapping-6.12-2024-09-19' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: reflow dma_supported dma-mapping: reliably inform about DMA support for IOMMU dma-mapping: add tracing for dma-mapping API calls dma-mapping: use IOMMU DMA calls for common alloc/free page calls dma-direct: optimize page freeing when it is not addressable dma-mapping: clearly mark DMA ops as an architecture feature vdpa_sim: don't select DMA_OPS arm64: mm: keep low RAM dma zone dma-mapping: don't return errors from dma_set_max_seg_size dma-mapping: don't return errors from dma_set_seg_boundary dma-mapping: don't return errors from dma_set_min_align_mask scsi: check that busses support the DMA API before setting dma parameters arm64: mm: fix DMA zone when dma-ranges is missing dma-mapping: direct calls for dma-iommu dma-mapping: call ->unmap_page and ->unmap_sg unconditionally arm64: support DMA zone above 4GB dma-mapping: replace zone_dma_bits by zone_dma_limit dma-mapping: use bit masking to check VM_DMA_COHERENT
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Revision tags: v6.11, v6.11-rc7, v6.11-rc6 |
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#
de6c85bf |
| 28-Aug-2024 |
Christoph Hellwig <hch@lst.de> |
dma-mapping: clearly mark DMA ops as an architecture feature
DMA ops are a helper for architectures and not for drivers to override the DMA implementation.
Unfortunately driver authors keep ignorin
dma-mapping: clearly mark DMA ops as an architecture feature
DMA ops are a helper for architectures and not for drivers to override the DMA implementation.
Unfortunately driver authors keep ignoring this. Make the fact more clear by renaming the symbol to ARCH_HAS_DMA_OPS and having the two drivers overriding their dma_ops depend on that. These drivers should probably be marked broken, but we can give them a bit of a grace period for that.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> # for IPU6 Acked-by: Robin Murphy <robin.murphy@arm.com>
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Revision tags: v6.11-rc5, v6.11-rc4, v6.11-rc3, v6.11-rc2, v6.11-rc1 |
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#
a23e1966 |
| 15-Jul-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge branch 'next' into for-linus
Prepare input updates for 6.11 merge window.
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Revision tags: v6.10, v6.10-rc7, v6.10-rc6, v6.10-rc5, v6.10-rc4, v6.10-rc3, v6.10-rc2 |
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#
6f47c7ae |
| 28-May-2024 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
Merge tag 'v6.9' into next
Sync up with the mainline to bring in the new cleanup API.
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Revision tags: v6.10-rc1 |
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#
60a2f25d |
| 16-May-2024 |
Tvrtko Ursulin <tursulin@ursulin.net> |
Merge drm/drm-next into drm-intel-gt-next
Some display refactoring patches are needed in order to allow conflict- less merging.
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
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#
594ce0b8 |
| 10-Jun-2024 |
Russell King (Oracle) <rmk+kernel@armlinux.org.uk> |
Merge topic branches 'clkdev' and 'fixes' into for-linus
|
Revision tags: v6.9, v6.9-rc7, v6.9-rc6, v6.9-rc5, v6.9-rc4, v6.9-rc3, v6.9-rc2, v6.9-rc1 |
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#
b228ab57 |
| 18-Mar-2024 |
Andrew Morton <akpm@linux-foundation.org> |
Merge branch 'master' into mm-stable
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#
79790b68 |
| 12-Apr-2024 |
Thomas Hellström <thomas.hellstrom@linux.intel.com> |
Merge drm/drm-next into drm-xe-next
Backmerging drm-next in order to get up-to-date and in particular to access commit 9ca5facd0400f610f3f7f71aeb7fc0b949a48c67.
Signed-off-by: Thomas Hellström <tho
Merge drm/drm-next into drm-xe-next
Backmerging drm-next in order to get up-to-date and in particular to access commit 9ca5facd0400f610f3f7f71aeb7fc0b949a48c67.
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
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#
3e5a516f |
| 08-Apr-2024 |
Dmitry Baryshkov <dmitry.baryshkov@linaro.org> |
Merge tag 'phy_dp_modes_6.10' into msm-next-lumag
Merge DisplayPort subnode API in order to allow DisplayPort driver to configure the PHYs either to the DP or eDP mode, depending on hardware configu
Merge tag 'phy_dp_modes_6.10' into msm-next-lumag
Merge DisplayPort subnode API in order to allow DisplayPort driver to configure the PHYs either to the DP or eDP mode, depending on hardware configuration.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
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#
5add703f |
| 02-Apr-2024 |
Rodrigo Vivi <rodrigo.vivi@intel.com> |
Merge drm/drm-next into drm-intel-next
Catching up on 6.9-rc2
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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#
0d21364c |
| 02-Apr-2024 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-next into drm-misc-next
Backmerging to get v6.9-rc2 changes into drm-misc-next.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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#
b7e1e969 |
| 26-Mar-2024 |
Takashi Iwai <tiwai@suse.de> |
Merge branch 'topic/sound-devel-6.10' into for-next
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#
537c2e91 |
| 22-Mar-2024 |
Jakub Kicinski <kuba@kernel.org> |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Cross-merge networking fixes after downstream PR.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Revision tags: v6.8, v6.8-rc7 |
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#
06d07429 |
| 29-Feb-2024 |
Jani Nikula <jani.nikula@intel.com> |
Merge drm/drm-next into drm-intel-next
Sync to get the drm_printer changes to drm-intel-next.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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#
f4566a1e |
| 25-Mar-2024 |
Ingo Molnar <mingo@kernel.org> |
Merge tag 'v6.9-rc1' into sched/core, to pick up fixes and to refresh the branch
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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#
100c8542 |
| 05-Apr-2024 |
Takashi Iwai <tiwai@suse.de> |
Merge tag 'asoc-fix-v6.9-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.9
A relatively large set of fixes here, the biggest piece of it is a
Merge tag 'asoc-fix-v6.9-rc2' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus
ASoC: Fixes for v6.9
A relatively large set of fixes here, the biggest piece of it is a series correcting some problems with the delay reporting for Intel SOF cards but there's a bunch of other things. Everything here is driver specific except for a fix in the core for an issue with sign extension handling volume controls.
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#
36a1818f |
| 25-Mar-2024 |
Thomas Zimmermann <tzimmermann@suse.de> |
Merge drm/drm-fixes into drm-misc-fixes
Backmerging to get drm-misc-fixes to the state of v6.9-rc1.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
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#
8a2fbffc |
| 15-Mar-2024 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'sparc-for-6.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc
Pull sparc updates from Andreas Larsson:
- Fix missing prototype warnings in various places, in
Merge tag 'sparc-for-6.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc
Pull sparc updates from Andreas Larsson:
- Fix missing prototype warnings in various places, including switching to using generic cmpdi2/ucmpdi2 and parport.h and stop selecting unneeded GENERIC_ISA_DMA.
- Reduce duplicate code by using shared font data, with dependency fixup in separate commit touching lib/fonts.
- Convert sbus drives to use remove callbacks returning void
- Fix return values of __setup handlers
- Section mismatch fix for grpci pci drivers
- Make the vio bus type constant
- Kconfig cleanups and fixes
- Typo fixes
* tag 'sparc-for-6.9-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/alarsson/linux-sparc: lib/fonts: Allow Sparc console 8x16 font for sparc64 early boot text console sbus: uctrl: Convert to platform remove callback returning void sbus: flash: Convert to platform remove callback returning void sbus: envctrl: Convert to platform remove callback returning void sbus: display7seg: Convert to platform remove callback returning void sbus: bbc_i2c: Convert to platform remove callback returning void sbus: Add prototype for bbc_envctrl_init and bbc_envctrl_cleanup to header sparc32: Fix section mismatch in leon_pci_grpci sparc32: Fix parport build with sparc32 sparc32: Do not select GENERIC_ISA_DMA mtd: maps: sun_uflash: Declare uflash_devinit static sparc32: Fix build with trapbase sparc32: Use generic cmpdi2/ucmpdi2 variants sparc: select FRAME_POINTER instead of redefining it sparc: vDSO: fix return value of __setup handler sparc64: NMI watchdog: fix return value of __setup handler sparc: vio: make vio_bus_type const sparc: Fix typos sparc: Use shared font data sparc: remove obsolete config ARCH_ATU
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Revision tags: v6.8-rc6 |
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#
99bd9a4f |
| 24-Feb-2024 |
Sam Ravnborg <sam@ravnborg.org> |
sparc32: Do not select GENERIC_ISA_DMA
sparc32 do not support generic isa dma, so do not select the symbol.
This fixes the following warnings: dma.c:70:5: error: no previous prototype for 'request_
sparc32: Do not select GENERIC_ISA_DMA
sparc32 do not support generic isa dma, so do not select the symbol.
This fixes the following warnings: dma.c:70:5: error: no previous prototype for 'request_dma' [-Werror=missing-prototypes] dma.c:88:6: error: no previous prototype for 'free_dma' [-Werror=missing-prototypes]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Fixes: 0fcb70851fbf ("Makefile.extrawarn: turn on missing-prototypes globally") Acked-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Cc: Andreas Larsson <andreas@gaisler.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Maciej W. Rozycki <macro@orcam.me.uk> Reviewed-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Andreas Larsson <andreas@gaisler.com> Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-5-1f186603c5c4@ravnborg.org
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#
802a8874 |
| 24-Feb-2024 |
Sam Ravnborg <sam@ravnborg.org> |
sparc32: Use generic cmpdi2/ucmpdi2 variants
Use the generic variants - the implementation is the same. As a nice side-effect fix the following warnings:
cmpdi2.c: warning: no previous prototype fo
sparc32: Use generic cmpdi2/ucmpdi2 variants
Use the generic variants - the implementation is the same. As a nice side-effect fix the following warnings:
cmpdi2.c: warning: no previous prototype for '__cmpdi2' [-Wmissing-prototypes] ucmpdi2.c: warning: no previous prototype for '__ucmpdi2' [-Wmissing-prototypes]
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Fixes: 0fcb70851fbf ("Makefile.extrawarn: turn on missing-prototypes globally") Reviewed-by: Randy Dunlap <rdunlap@infradead.org> Tested-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Reviewed-by: Maciej W. Rozycki <macro@orcam.me.uk> Tested-by: Maciej W. Rozycki <macro@orcam.me.uk> # build-tested Cc: "David S. Miller" <davem@davemloft.net> Cc: Andreas Larsson <andreas@gaisler.com> Reviewed-by: Andreas Larsson <andreas@gaisler.com> Tested-by: Andreas Larsson <andreas@gaisler.com> Signed-off-by: Andreas Larsson <andreas@gaisler.com> Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-1-1f186603c5c4@ravnborg.org
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Revision tags: v6.8-rc5, v6.8-rc4, v6.8-rc3, v6.8-rc2, v6.8-rc1, v6.7, v6.7-rc8, v6.7-rc7, v6.7-rc6, v6.7-rc5, v6.7-rc4, v6.7-rc3, v6.7-rc2, v6.7-rc1, v6.6, v6.6-rc7, v6.6-rc6, v6.6-rc5, v6.6-rc4, v6.6-rc3, v6.6-rc2, v6.6-rc1, v6.5, v6.5-rc7, v6.5-rc6 |
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#
0f199194 |
| 07-Aug-2023 |
Dr. David Alan Gilbert <linux@treblig.org> |
sparc: Use shared font data
sparc has a 'btext' font used for the console which is almost identical to the shared font_sun8x16, so use it rather than duplicating the data.
They were actually identi
sparc: Use shared font data
sparc has a 'btext' font used for the console which is almost identical to the shared font_sun8x16, so use it rather than duplicating the data.
They were actually identical until about a decade ago when commit bcfbeecea11c ("drivers: console: font_: Change a glyph from "broken bar" to "vertical line"")
which changed the | in the shared font to be a solid bar rather than a broken bar. That's the only difference.
This was originally spotted by PMD which noticed that PPC does the same thing with the same data, and they also share a bunch of functions to manipulate the data.
Tested very lightly with a boot without FS in qemu.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Andreas Larsson <andreas@gaisler.com> Link: https://lore.kernel.org/r/20230807010914.799713-1-linux@treblig.org
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#
0955723e |
| 11-Dec-2023 |
Lukas Bulwahn <lukas.bulwahn@gmail.com> |
sparc: remove obsolete config ARCH_ATU
Before consolidation of commit 4965a68780c5 ("arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig"), the config ARCH_ATU was used to control th
sparc: remove obsolete config ARCH_ATU
Before consolidation of commit 4965a68780c5 ("arch: define the ARCH_DMA_ADDR_T_64BIT config symbol in lib/Kconfig"), the config ARCH_ATU was used to control the state of the config ARCH_DMA_ADDR_T_64BIT. After this consolidation, the config ARCH_ATU has been without use and effect.
Remove this obsolete config.
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andreas Larsson <andreas@gaisler.com> Link: https://lore.kernel.org/r/20231211083029.22078-1-lukas.bulwahn@gmail.com
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#
902861e3 |
| 15-Mar-2024 |
Linus Torvalds <torvalds@linux-foundation.org> |
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- Sumanth Korikkar has taught s390 to allocate hotplug-time page
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames from hotplugged memory rather than only from main memory. Series "implement "memmap on memory" feature on s390".
- More folio conversions from Matthew Wilcox in the series
"Convert memcontrol charge moving to use folios" "mm: convert mm counter to take a folio"
- Chengming Zhou has optimized zswap's rbtree locking, providing significant reductions in system time and modest but measurable reductions in overall runtimes. The series is "mm/zswap: optimize the scalability of zswap rb-tree".
- Chengming Zhou has also provided the series "mm/zswap: optimize zswap lru list" which provides measurable runtime benefits in some swap-intensive situations.
- And Chengming Zhou further optimizes zswap in the series "mm/zswap: optimize for dynamic zswap_pools". Measured improvements are modest.
- zswap cleanups and simplifications from Yosry Ahmed in the series "mm: zswap: simplify zswap_swapoff()".
- In the series "Add DAX ABI for memmap_on_memory", Vishal Verma has contributed several DAX cleanups as well as adding a sysfs tunable to control the memmap_on_memory setting when the dax device is hotplugged as system memory.
- Johannes Weiner has added the large series "mm: zswap: cleanups", which does that.
- More DAMON work from SeongJae Park in the series
"mm/damon: make DAMON debugfs interface deprecation unignorable" "selftests/damon: add more tests for core functionalities and corner cases" "Docs/mm/damon: misc readability improvements" "mm/damon: let DAMOS feeds and tame/auto-tune itself"
- In the series "mm/mempolicy: weighted interleave mempolicy and sysfs extension" Rakie Kim has developed a new mempolicy interleaving policy wherein we allocate memory across nodes in a weighted fashion rather than uniformly. This is beneficial in heterogeneous memory environments appearing with CXL.
- Christophe Leroy has contributed some cleanup and consolidation work against the ARM pagetable dumping code in the series "mm: ptdump: Refactor CONFIG_DEBUG_WX and check_wx_pages debugfs attribute".
- Luis Chamberlain has added some additional xarray selftesting in the series "test_xarray: advanced API multi-index tests".
- Muhammad Usama Anjum has reworked the selftest code to make its human-readable output conform to the TAP ("Test Anything Protocol") format. Amongst other things, this opens up the use of third-party tools to parse and process out selftesting results.
- Ryan Roberts has added fork()-time PTE batching of THP ptes in the series "mm/memory: optimize fork() with PTE-mapped THP". Mainly targeted at arm64, this significantly speeds up fork() when the process has a large number of pte-mapped folios.
- David Hildenbrand also gets in on the THP pte batching game in his series "mm/memory: optimize unmap/zap with PTE-mapped THP". It implements batching during munmap() and other pte teardown situations. The microbenchmark improvements are nice.
- And in the series "Transparent Contiguous PTEs for User Mappings" Ryan Roberts further utilizes arm's pte's contiguous bit ("contpte mappings"). Kernel build times on arm64 improved nicely. Ryan's series "Address some contpte nits" provides some followup work.
- In the series "mm/hugetlb: Restore the reservation" Breno Leitao has fixed an obscure hugetlb race which was causing unnecessary page faults. He has also added a reproducer under the selftest code.
- In the series "selftests/mm: Output cleanups for the compaction test", Mark Brown did what the title claims.
- Kinsey Ho has added the series "mm/mglru: code cleanup and refactoring".
- Even more zswap material from Nhat Pham. The series "fix and extend zswap kselftests" does as claimed.
- In the series "Introduce cpu_dcache_is_aliasing() to fix DAX regression" Mathieu Desnoyers has cleaned up and fixed rather a mess in our handling of DAX on archiecctures which have virtually aliasing data caches. The arm architecture is the main beneficiary.
- Lokesh Gidra's series "per-vma locks in userfaultfd" provides dramatic improvements in worst-case mmap_lock hold times during certain userfaultfd operations.
- Some page_owner enhancements and maintenance work from Oscar Salvador in his series
"page_owner: print stacks and their outstanding allocations" "page_owner: Fixup and cleanup"
- Uladzislau Rezki has contributed some vmalloc scalability improvements in his series "Mitigate a vmap lock contention". It realizes a 12x improvement for a certain microbenchmark.
- Some kexec/crash cleanup work from Baoquan He in the series "Split crash out from kexec and clean up related config items".
- Some zsmalloc maintenance work from Chengming Zhou in the series
"mm/zsmalloc: fix and optimize objects/page migration" "mm/zsmalloc: some cleanup for get/set_zspage_mapping()"
- Zi Yan has taught the MM to perform compaction on folios larger than order=0. This a step along the path to implementaton of the merging of large anonymous folios. The series is named "Enable >0 order folio memory compaction".
- Christoph Hellwig has done quite a lot of cleanup work in the pagecache writeback code in his series "convert write_cache_pages() to an iterator".
- Some modest hugetlb cleanups and speedups in Vishal Moola's series "Handle hugetlb faults under the VMA lock".
- Zi Yan has changed the page splitting code so we can split huge pages into sizes other than order-0 to better utilize large folios. The series is named "Split a folio to any lower order folios".
- David Hildenbrand has contributed the series "mm: remove total_mapcount()", a cleanup.
- Matthew Wilcox has sought to improve the performance of bulk memory freeing in his series "Rearrange batched folio freeing".
- Gang Li's series "hugetlb: parallelize hugetlb page init on boot" provides large improvements in bootup times on large machines which are configured to use large numbers of hugetlb pages.
- Matthew Wilcox's series "PageFlags cleanups" does that.
- Qi Zheng's series "minor fixes and supplement for ptdesc" does that also. S390 is affected.
- Cleanups to our pagemap utility functions from Peter Xu in his series "mm/treewide: Replace pXd_large() with pXd_leaf()".
- Nico Pache has fixed a few things with our hugepage selftests in his series "selftests/mm: Improve Hugepage Test Handling in MM Selftests".
- Also, of course, many singleton patches to many things. Please see the individual changelogs for details.
* tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (435 commits) mm/zswap: remove the memcpy if acomp is not sleepable crypto: introduce: acomp_is_async to expose if comp drivers might sleep memtest: use {READ,WRITE}_ONCE in memory scanning mm: prohibit the last subpage from reusing the entire large folio mm: recover pud_leaf() definitions in nopmd case selftests/mm: skip the hugetlb-madvise tests on unmet hugepage requirements selftests/mm: skip uffd hugetlb tests with insufficient hugepages selftests/mm: dont fail testsuite due to a lack of hugepages mm/huge_memory: skip invalid debugfs new_order input for folio split mm/huge_memory: check new folio order when split a folio mm, vmscan: retry kswapd's priority loop with cache_trim_mode off on failure mm: add an explicit smp_wmb() to UFFDIO_CONTINUE mm: fix list corruption in put_pages_list mm: remove folio from deferred split list before uncharging it filemap: avoid unnecessary major faults in filemap_fault() mm,page_owner: drop unnecessary check mm,page_owner: check for null stack_record before bumping its refcount mm: swap: fix race between free_swap_and_cache() and swapoff() mm/treewide: align up pXd_leaf() retval across archs mm/treewide: drop pXd_large() ...
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#
8690bbcf |
| 15-Feb-2024 |
Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
Introduce cpu_dcache_is_aliasing() across all architectures
Introduce a generic way to query whether the data cache is virtually aliased on all architectures. Its purpose is to ensure that subsystem
Introduce cpu_dcache_is_aliasing() across all architectures
Introduce a generic way to query whether the data cache is virtually aliased on all architectures. Its purpose is to ensure that subsystems which are incompatible with virtually aliased data caches (e.g. FS_DAX) can reliably query this.
For data cache aliasing, there are three scenarios dependending on the architecture. Here is a breakdown based on my understanding:
A) The data cache is always aliasing:
* arc * csky * m68k (note: shared memory mappings are incoherent ? SHMLBA is missing there.) * sh * parisc
B) The data cache aliasing is statically known or depends on querying CPU state at runtime:
* arm (cache_is_vivt() || cache_is_vipt_aliasing()) * mips (cpu_has_dc_aliases) * nios2 (NIOS2_DCACHE_SIZE > PAGE_SIZE) * sparc32 (vac_cache_size > PAGE_SIZE) * sparc64 (L1DCACHE_SIZE > PAGE_SIZE) * xtensa (DCACHE_WAY_SIZE > PAGE_SIZE)
C) The data cache is never aliasing:
* alpha * arm64 (aarch64) * hexagon * loongarch (but with incoherent write buffers, which are disabled since commit d23b7795 ("LoongArch: Change SHMLBA from SZ_64K to PAGE_SIZE")) * microblaze * openrisc * powerpc * riscv * s390 * um * x86
Require architectures in A) and B) to select ARCH_HAS_CPU_CACHE_ALIASING and implement "cpu_dcache_is_aliasing()".
Architectures in C) don't select ARCH_HAS_CPU_CACHE_ALIASING, and thus cpu_dcache_is_aliasing() simply evaluates to "false".
Note that this leaves "cpu_icache_is_aliasing()" to be implemented as future work. This would be useful to gate features like XIP on architectures which have aliasing CPU dcache-icache but not CPU dcache-dcache.
Use "cpu_dcache" and "cpu_cache" rather than just "dcache" and "cache" to clarify that we really mean "CPU data cache" and "CPU cache" to eliminate any possible confusion with VFS "dentry cache" and "page cache".
Link: https://lore.kernel.org/lkml/20030910210416.GA24258@mail.jlokier.co.uk/ Link: https://lkml.kernel.org/r/20240215144633.96437-9-mathieu.desnoyers@efficios.com Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches") Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Dave Jiang <dave.jiang@intel.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Russell King <linux@armlinux.org.uk> Cc: Alasdair Kergon <agk@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: kernel test robot <lkp@intel.com> Cc: Michael Sclafani <dm-devel@lists.linux.dev> Cc: Mike Snitzer <snitzer@kernel.org> Cc: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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41c177cf |
| 11-Feb-2024 |
Rob Clark <robdclark@chromium.org> |
Merge tag 'drm-misc-next-2024-02-08' into msm-next
Merge the drm-misc tree to uprev MSM CI.
Signed-off-by: Rob Clark <robdclark@chromium.org>
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