kernel.git/arch/mips/mm, branch linux-6.9.y

MIPS: tlbex: Use GPR number macros

2024-02-20T11:41:52Z

Use GPR number macros in uasm code generation parts to reduce code duplication. No functional change. Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer

MIPS: page: Use GPR number macros

2024-02-20T11:41:52Z

Use GPR number macros in uasm code generation parts to reduce code duplication. No functional change. Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer

MIPS: Unify define of CP0 registers for uasm code

2024-02-20T11:41:51Z

Definitions of uasm variant of CP0 registers are unified to mipsregs.h, so they lay together with uasm variant of the code. Signed-off-by: Jiaxun Yang Signed-off-by: Thomas Bogendoerfer

Merge tag 'iommu-updates-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

2024-01-18T23:16:57Z

Pull iommu updates from Joerg Roedel: "Core changes: - Fix race conditions in device probe path - Retire IOMMU bus_ops - Support for passing custom allocators to page table drivers - Clean up Kconfig around IOMMU_SVA - Support for sharing SVA domains with all devices bound to a mm - Firmware data parsing cleanup - Tracing improvements for iommu-dma code - Some smaller fixes and cleanups ARM-SMMU drivers: - Device-tree binding updates: - Add additional compatible strings for Qualcomm SoCs - Document Adreno clocks for Qualcomm's SM8350 SoC - SMMUv2: - Implement support for the ->domain_alloc_paging() callback - Ensure Secure context is restored following suspend of Qualcomm SMMU implementation - SMMUv3: - Disable stalling mode for the "quiet" context descriptor - Minor refactoring and driver cleanups Intel VT-d driver: - Cleanup and refactoring AMD IOMMU driver: - Improve IO TLB invalidation logic - Small cleanups and improvements Rockchip IOMMU driver: - DT binding update to add Rockchip RK3588 Apple DART driver: - Apple M1 USB4/Thunderbolt DART support - Cleanups Virtio IOMMU driver: - Add support for iotlb_sync_map - Enable deferred IO TLB flushes" * tag 'iommu-updates-v6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (66 commits) iommu: Don't reserve 0-length IOVA region iommu/vt-d: Move inline helpers to header files iommu/vt-d: Remove unused vcmd interfaces iommu/vt-d: Remove unused parameter of intel_pasid_setup_pass_through() iommu/vt-d: Refactor device_to_iommu() to retrieve iommu directly iommu/sva: Fix memory leak in iommu_sva_bind_device() dt-bindings: iommu: rockchip: Add Rockchip RK3588 iommu/dma: Trace bounce buffer usage when mapping buffers iommu/arm-smmu: Convert to domain_alloc_paging() iommu/arm-smmu: Pass arm_smmu_domain to internal functions iommu/arm-smmu: Implement IOMMU_DOMAIN_BLOCKED iommu/arm-smmu: Convert to a global static identity domain iommu/arm-smmu: Reorganize arm_smmu_domain_add_master() iommu/arm-smmu-v3: Remove ARM_SMMU_DOMAIN_NESTED iommu/arm-smmu-v3: Master cannot be NULL in arm_smmu_write_strtab_ent() iommu/arm-smmu-v3: Add a type for the STE iommu/arm-smmu-v3: disable stall for quiet_cd iommu/qcom: restore IOMMU state if needed iommu/arm-smmu-qcom: Add QCM2290 MDSS compatible iommu/arm-smmu-qcom: Add missing GMU entry to match table ...

Merge tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2024-01-17T19:20:50Z

Pull MIPS updates from Thomas Bogendoerfer: "Just cleanups and fixes" * tag 'mips_6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: MIPS: Alchemy: Fix an out-of-bound access in db1550_dev_setup() MIPS: Alchemy: Fix an out-of-bound access in db1200_dev_setup() MIPS: Fix typos MIPS: Remove unused shadow GPR support from vector irq setup MIPS: Allow vectored interrupt handler to reside everywhere for 64bit mips: Set dump-stack arch description mips: mm: add slab availability checking in ioremap_prot mips: Optimize max_mapnr init procedure mips: Fix max_mapnr being uninitialized on early stages mips: Fix incorrect max_low_pfn adjustment mips: dmi: Fix early remap on MIPS32 MIPS: compressed: Use correct instruction for 64 bit code MIPS: SGI-IP27: hubio: fix nasid kernel-doc warning MAINTAINERS: Add myself as maintainer of the Ralink architecture

MIPS: Fix typos

2024-01-08T09:39:12Z

Fix typos, most reported by "codespell arch/mips". Only touches comments, no code changes. Signed-off-by: Bjorn Helgaas Cc: linux-mips@vger.kernel.org Reviewed-by: Randy Dunlap Signed-off-by: Thomas Bogendoerfer

mips: mm: add slab availability checking in ioremap_prot

2023-12-21T14:32:46Z

Recent commit a5f616483110 ("mm/ioremap: add slab availability checking in ioremap_prot") added the slab availability check to the generic ioremap_prot() implementation. It is reasonable to be done for the MIPS32-specific method too since it also relies on the get_vm_area_caller() function (by means of get_vm_area()) which requires the slab allocator being up and running before being called. Signed-off-by: Serge Semin Signed-off-by: Thomas Bogendoerfer

mips: Optimize max_mapnr init procedure

2023-12-21T14:32:23Z

max_mapnr defines the upper boundary of the pages space in the system. Currently in case if HIGHMEM is available it's calculated based on the upper high memory PFN limit value. Seeing there is a case when it isn't fully correct let's optimize out the max_mapnr variable initialization procedure to cover all the handled in the paging_init() method cases: 1. If CPU has DC-aliases, then high memory is unavailable so the PFNs upper boundary is determined by max_low_pfn. 2. Otherwise if high memory is available, use highend_pfn value representing the upper high memory PFNs limit. 3. Otherwise no high memory is available so set max_mapnr with the low-memory upper limit. Signed-off-by: Serge Semin Signed-off-by: Thomas Bogendoerfer

mips: Fix max_mapnr being uninitialized on early stages

2023-12-21T14:32:09Z

max_mapnr variable is utilized in the pfn_valid() method in order to determine the upper PFN space boundary. Having it uninitialized effectively makes any PFN passed to that method invalid. That in its turn causes the kernel mm-subsystem occasion malfunctions even after the max_mapnr variable is actually properly updated. For instance, pfn_valid() is called in the init_unavailable_range() method in the framework of the calls-chain on MIPS: setup_arch() +-> paging_init() +-> free_area_init() +-> memmap_init() +-> memmap_init_zone_range() +-> init_unavailable_range() Since pfn_valid() always returns "false" value before max_mapnr is initialized in the mem_init() method, any flatmem page-holes will be left in the poisoned/uninitialized state including the IO-memory pages. Thus any further attempts to map/remap the IO-memory by using MMU may fail. In particular it happened in my case on attempt to map the SRAM region. The kernel bootup procedure just crashed on the unhandled unaligned access bug raised in the __update_cache() method: > Unhandled kernel unaligned access[#1]: > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc1-XXX-dirty #2056 > ... > Call Trace: > [<8011ef9c>] __update_cache+0x88/0x1bc > [<80385944>] ioremap_page_range+0x110/0x2a4 > [<80126948>] ioremap_prot+0x17c/0x1f4 > [<80711b80>] __devm_ioremap+0x8c/0x120 > [<80711e0c>] __devm_ioremap_resource+0xf4/0x218 > [<808bf244>] sram_probe+0x4f4/0x930 > [<80889d20>] platform_probe+0x68/0xec > ... Let's fix the problem by initializing the max_mapnr variable as soon as the required data is available. In particular it can be done right in the paging_init() method before free_area_init() is called since all the PFN zone boundaries have already been calculated by that time. Cc: stable@vger.kernel.org Signed-off-by: Serge Semin Signed-off-by: Thomas Bogendoerfer

mips: fix r3k_cache_init build regression

2023-12-20T23:02:57Z

My earlier patch removed __weak function declarations that used to be turned into wild branches by the linker, instead causing a link failure when the called functions are unavailable: mips-linux-ld: arch/mips/mm/cache.o: in function `cpu_cache_init': cache.c:(.text+0x670): undefined reference to `r3k_cache_init' The __weak method seems suboptimal, so rather than putting that back, make the function calls conditional on the Kconfig symbol that controls the compilation. [akpm@linux-foundation.org: fix whitespace while we're in there] Link: https://lkml.kernel.org/r/20231214205506.310402-1-arnd@kernel.org Fixes: 66445677f01e ("mips: move cache declarations into header") Signed-off-by: Arnd Bergmann Reported-by: kernelci.org bot Cc: Jiaxun Yang Cc: Thomas Bogendoerfer Cc: Zi Yan Signed-off-by: Andrew Morton