BMC/Intel-BMC/linux.git/arch/csky/mm, branch dev-5.4

csky: Fixup get wrong psr value from phyical reg

2020-04-23T08:36:38+00:00

[ Upstream commit 9c0e343d7654a329d1f9b53d253cbf7fb6eff85d ] We should get psr value from regs->psr in stack, not directly get it from phyiscal register then save the vector number in tsk->trap_no. Signed-off-by: Guo Ren Signed-off-by: Sasha Levin

csky: Fixup ftrace modify panic

2020-03-12T12:00:16+00:00

[ Upstream commit 359ae00d12589c31cf103894d0f32588d523ca83 ] During ftrace init, linux will replace all function prologues (call_mcout) with nops, but it need flush_dcache and invalidate_icache to make it work. So flush_cache functions couldn't be nested called by ftrace framework. Signed-off-by: Guo Ren Signed-off-by: Sasha Levin

csky/mm: Fixup export invalid_pte_table symbol

2020-03-12T12:00:16+00:00

[ Upstream commit 7f4a567332f035ab16b29010fbd04a0f10183c77 ] There is no present bit in csky pmd hardware, so we need to prepare invalid_pte_table for empty pmd entry and the functions (pmd_none & pmd_present) in pgtable.h need invalid_pte_talbe to get result. If a module use these functions, we need export the symbol for it. Signed-off-by: Guo Ren Cc: Mo Qihui Cc: Zhange Jian Signed-off-by: Sasha Levin

Merge tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux

2019-09-30T17:16:17+00:00

Pull csky updates from Guo Ren: "This round of csky subsystem just some fixups: - Fix mb() synchronization problem - Fix dma_alloc_coherent with PAGE_SO attribute - Fix cache_op failed when cross memory ZONEs - Optimize arch_sync_dma_for_cpu/device with dma_inv_range - Fix ioremap function losing - Fix arch_get_unmapped_area() implementation - Fix defer cache flush for 610 - Support kernel non-aligned access - Fix 610 vipt cache flush mechanism - Fix add zero_fp fixup perf backtrace panic - Move static keyword to the front of declaration - Fix csky_pmu.max_period assignment - Use generic free_initrd_mem() - entry: Remove unneeded need_resched() loop" * tag 'csky-for-linus-5.4-rc1' of git://github.com/c-sky/csky-linux: csky: Move static keyword to the front of declaration csky: entry: Remove unneeded need_resched() loop csky: Fixup csky_pmu.max_period assignment csky: Fixup add zero_fp fixup perf backtrace panic csky: Use generic free_initrd_mem() csky: Fixup 610 vipt cache flush mechanism csky: Support kernel non-aligned access csky: Fixup defer cache flush for 610 csky: Fixup arch_get_unmapped_area() implementation csky: Fixup ioremap function losing csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range csky/dma: Fixup cache_op failed when cross memory ZONEs csky: Fixup dma_alloc_coherent with PAGE_SO attribute csky: Fixup mb() synchronization problem

csky: Use generic free_initrd_mem()

2019-09-30T02:26:24+00:00

The csky implementation of free_initrd_mem() is an open-coded version of free_reserved_area() without poisoning. Remove it and make csky use the generic version of free_initrd_mem(). Signed-off-by: Mike Rapoport Signed-off-by: Guo Ren

dma-mapping: make dma_atomic_pool_init self-contained

2019-08-29T14:43:33+00:00

The memory allocated for the atomic pool needs to have the same mapping attributes that we use for remapping, so use pgprot_dmacoherent instead of open coding it. Also deduct a suitable zone to allocate the memory from based on the presence of the DMA zones. Signed-off-by: Christoph Hellwig

csky: Fixup ioremap function losing

2019-08-15T11:21:28+00:00

Implement the following apis to meet usage in different scenarios. - ioremap (NonCache + StrongOrder) - ioremap_nocache (NonCache + StrongOrder) - ioremap_wc (NonCache + WeakOrder ) - ioremap_cache ( Cache + WeakOrder ) Also change flag VM_ALLOC to VM_IOREMAP in get_vm_area_caller. Signed-off-by: Guo Ren Cc: Arnd Bergmann Cc: Christoph Hellwig

csky: Optimize arch_sync_dma_for_cpu/device with dma_inv_range

2019-08-06T07:15:34+00:00

DMA_FROM_DEVICE only need to read dma data of memory into CPU cache, so there is no need to clear cache before. Also clear + inv for DMA_FROM_DEVICE won't cause problem, because the memory range for dma won't be touched by software during dma working. Changes for V2: - Remove clr cache and ignore the DMA_TO_DEVICE in _for_cpu. - Change inv to wbinv cache with DMA_FROM_DEVICE in _for_device. Signed-off-by: Guo Ren Cc: Arnd Bergmann

csky/dma: Fixup cache_op failed when cross memory ZONEs

2019-08-06T07:12:59+00:00

If the paddr and size are cross between NORMAL_ZONE and HIGHMEM_ZONE memory range, cache_op will panic in do_page_fault with bad_area. Optimize the code to support the range which cross memory ZONEs. Changes for V2: - Revert back to postcore_initcall Signed-off-by: Guo Ren Cc: Christoph Hellwig Cc: Arnd Bergmann

csky: Fixup dma_alloc_coherent with PAGE_SO attribute

2019-07-31T03:05:25+00:00

This bug is from commit: 2b070ccdf8c0 (fixup abiv2 mmap(... O_SYNC) failed). In that patch we remove the _PAGE_SO for memory noncache mapping and this will cause problem when drivers use dma descriptors to control the transcations without dma_w/rmb(). After referencing other archs' implementation, pgprot_writecombine is introduced for mmap(... O_SYNC). Signed-off-by: Guo Ren