linux-dev/arch/powerpc/mm/mem.c, branch linus/master

Merge tag 'powerpc-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2022-05-28T18:27:17Z

Pull powerpc updates from Michael Ellerman: - Convert to the generic mmap support (ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT) - Add support for outline-only KASAN with 64-bit Radix MMU (P9 or later) - Increase SIGSTKSZ and MINSIGSTKSZ and add support for AT_MINSIGSTKSZ - Enable the DAWR (Data Address Watchpoint) on POWER9 DD2.3 or later - Drop support for system call instruction emulation - Many other small features and fixes Thanks to Alexey Kardashevskiy, Alistair Popple, Andy Shevchenko, Bagas Sanjaya, Bjorn Helgaas, Bo Liu, Chen Huang, Christophe Leroy, Colin Ian King, Daniel Axtens, Dwaipayan Ray, Fabiano Rosas, Finn Thain, Frank Rowand, Fuqian Huang, Guilherme G. Piccoli, Hangyu Hua, Haowen Bai, Haren Myneni, Hari Bathini, He Ying, Jason Wang, Jiapeng Chong, Jing Yangyang, Joel Stanley, Julia Lawall, Kajol Jain, Kevin Hao, Krzysztof Kozlowski, Laurent Dufour, Lv Ruyi, Madhavan Srinivasan, Magali Lemes, Miaoqian Lin, Minghao Chi, Nathan Chancellor, Naveen N. Rao, Nicholas Piggin, Oliver O'Halloran, Oscar Salvador, Pali Rohár, Paul Mackerras, Peng Wu, Qing Wang, Randy Dunlap, Reza Arbab, Russell Currey, Sohaib Mohamed, Vaibhav Jain, Vasant Hegde, Wang Qing, Wang Wensheng, Xiang wangx, Xiaomeng Tong, Xu Wang, Yang Guang, Yang Li, Ye Bin, YueHaibing, Yu Kuai, Zheng Bin, Zou Wei, and Zucheng Zheng. * tag 'powerpc-5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (200 commits) powerpc/64: Include cache.h directly in paca.h powerpc/64s: Only set HAVE_ARCH_UNMAPPED_AREA when CONFIG_PPC_64S_HASH_MMU is set powerpc/xics: Include missing header powerpc/powernv/pci: Drop VF MPS fixup powerpc/fsl_book3e: Don't set rodata RO too early powerpc/microwatt: Add mmu bits to device tree powerpc/powernv/flash: Check OPAL flash calls exist before using powerpc/powermac: constify device_node in of_irq_parse_oldworld() powerpc/powermac: add missing g5_phy_disable_cpu1() declaration selftests/powerpc/pmu: fix spelling mistake "mis-match" -> "mismatch" powerpc: Enable the DAWR on POWER9 DD2.3 and above powerpc/64s: Add CPU_FTRS_POWER10 to ALWAYS mask powerpc/64s: Add CPU_FTRS_POWER9_DD2_2 to CPU_FTRS_ALWAYS mask powerpc: Fix all occurences of "the the" selftests/powerpc/pmu/ebb: remove fixed_instruction.S powerpc/platforms/83xx: Use of_device_get_match_data() powerpc/eeh: Drop redundant spinlock initialization powerpc/iommu: Add missing of_node_put in iommu_init_early_dart powerpc/pseries/vas: Call misc_deregister if sysfs init fails powerpc/papr_scm: Fix leaking nvdimm_events_map elements ...

powerpc/ftrace: Remove ftrace init tramp once kernel init is complete

2022-05-22T05:58:29Z

Stop using the ftrace trampoline for init section once kernel init is complete. Fixes: 67361cf8071286 ("powerpc/ftrace: Handle large kernel configs") Cc: stable@vger.kernel.org # v4.20+ Signed-off-by: Naveen N. Rao Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220516071422.463738-1-naveen.n.rao@linux.vnet.ibm.com

powerpc/code-patching: Use jump_label for testing freed initmem

2022-05-11T13:06:39Z

Once init is done, initmem is freed forever so no need to test system_state at every call to patch_instruction(). Use jump_label. This reduces by 2% the time needed to activate ftrace on an 8xx. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/0aee964721cab7316cffde21a2ca223cee14d373.1647962456.git.christophe.leroy@csgroup.eu

swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction

2022-04-18T05:21:12Z

Power SVM wants to allocate a swiotlb buffer that is not restricted to low memory for the trusted hypervisor scheme. Consolidate the support for this into the swiotlb_init interface by adding a new flag. Signed-off-by: Christoph Hellwig Reviewed-by: Konrad Rzeszutek Wilk Tested-by: Boris Ostrovsky

swiotlb: make the swiotlb_init interface more useful

2022-04-18T05:21:11Z

Pass a boolean flag to indicate if swiotlb needs to be enabled based on the addressing needs, and replace the verbose argument with a set of flags, including one to force enable bounce buffering. Note that this patch removes the possibility to force xen-swiotlb use with the swiotlb=force parameter on the command line on x86 (arm and arm64 never supported that), but this interface will be restored shortly. Signed-off-by: Christoph Hellwig Reviewed-by: Konrad Rzeszutek Wilk Tested-by: Boris Ostrovsky

Revert "powerpc: Set max_mapnr correctly"

2022-04-06T22:54:35Z

This reverts commit 602946ec2f90d5bd965857753880db29d2d9a1e9. If CONFIG_HIGHMEM is enabled, no highmem will be added with max_mapnr set to max_low_pfn, see mem_init(): for (pfn = highmem_mapnr; pfn < max_mapnr; ++pfn) { ... free_highmem_page(); } Now that virt_addr_valid() has been fixed in the previous commit, we can revert the change to max_mapnr. Fixes: 602946ec2f90 ("powerpc: Set max_mapnr correctly") Signed-off-by: Kefeng Wang Reviewed-by: Christophe Leroy Reported-by: Erhard F. [mpe: Update change log to reflect series reordering] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220406145802.538416-2-mpe@ellerman.id.au

powerpc/code-patching: Remove init_mem_is_free

2021-12-23T11:35:24Z

A new state has been added by commit d2635f2012a4 ("mm: create a new system state and fix core_kernel_text()"). That state tells when initmem is about to be released and is redundant with init_mem_is_free. Remove init_mem_is_free. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/ad8c3ccb39c8edaa89fd3eda1cc7218baea1cde5.1638446239.git.christophe.leroy@csgroup.eu

Revert "powerpc/code-patching: Improve verification of patchability"

2021-11-29T06:41:52Z

This reverts commit 8b8a8f0ab3f5519e45c526f826a655817486c5bb. As reported[1] by Sachin this causes problems with ftrace, and it also causes the code patching selftests to fail as reported[2] by Stephen. So revert it for now. 1: https://lore.kernel.org/linuxppc-dev/3668743C-09DF-4673-B15C-2FFE2A57F7D7@linux.vnet.ibm.com/ 2: https://lore.kernel.org/linuxppc-dev/20211126161747.1f7795b0@canb.auug.org.au/ Signed-off-by: Michael Ellerman

powerpc/code-patching: Improve verification of patchability

2021-11-25T00:25:32Z

Today, patch_instruction() assumes that it is called exclusively on valid addresses, and only checks that it is not called on an init address after init section has been freed. Improve verification by calling kernel_text_address() instead. kernel_text_address() already includes a verification of initmem release. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/bc683d499a411730504b132a924de0ccc2ef1f79.1636971137.git.christophe.leroy@csgroup.eu

powerpc: Set max_mapnr correctly

2021-10-13T02:28:22Z

max_mapnr is used by virt_addr_valid() to check if a linear address is valid. It must only include lowmem PFNs, like other architectures. Problem detected on a system with 1G mem (Only 768M are mapped), with CONFIG_DEBUG_VIRTUAL and CONFIG_TEST_DEBUG_VIRTUAL, it didn't report virt_to_phys(VMALLOC_START), VMALLOC_START being 0xf1000000. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/77d99037782ac4b3c3b0124fc4ae80ce7b760b05.1634035228.git.christophe.leroy@csgroup.eu