blackbird-op-linux/arch/xtensa/mm, branch master

xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map

2019-11-26T19:33:39+00:00

KASAN shadow map doesn't need to be accessible through the linear kernel mapping, allocate its pages with MEMBLOCK_ALLOC_ANYWHERE so that high memory can be used. This frees up to ~100MB of low memory on xtensa configurations with KASAN and high memory. Cc: stable@vger.kernel.org # v5.1+ Fixes: f240ec09bb8a ("memblock: replace memblock_alloc_base(ANYWHERE) with memblock_phys_alloc") Reviewed-by: Mike Rapoport Signed-off-by: Max Filippov

xtensa: fix TLB sanity checker

2019-11-26T19:33:39+00:00

Virtual and translated addresses retrieved by the xtensa TLB sanity checker must be consistent, i.e. correspond to the same state of the checked TLB entry. KASAN shadow memory is mapped dynamically using auto-refill TLB entries and thus may change TLB state between the virtual and translated address retrieval, resulting in false TLB insanity report. Move read_xtlb_translation close to read_xtlb_virtual to make sure that read values are consistent. Cc: stable@vger.kernel.org Fixes: a99e07ee5e88 ("xtensa: check TLB sanity on return to userspace") Signed-off-by: Max Filippov

xtensa: get rid of __ARCH_USE_5LEVEL_HACK

2019-11-26T19:33:39+00:00

xtensa has 2-level page tables and already uses pgtable-nopmd for page table folding. Add walks of p4d level where appropriate and drop usage of __ARCH_USE_5LEVEL_HACK. Signed-off-by: Mike Rapoport Message-Id: <1572964400-16542-3-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov [fix up arch/xtensa/include/asm/fixmap.h and arch/xtensa/mm/tlb.c]

xtensa: mm: fix PMD folding implementation

2019-11-26T19:33:39+00:00

There was a definition of pmd_offset() in arch/xtensa/include/asm/pgtable.h that shadowed the generic implementation defined in include/asm-generic/pgtable-nopmd.h. As the result, xtensa had shortcuts in page table traversal in several places instead of doing level unfolding. Remove local override for pmd_offset() and add page table unfolding where necessary. Signed-off-by: Mike Rapoport Message-Id: <1572964400-16542-2-git-send-email-rppt@kernel.org> Signed-off-by: Max Filippov

xtensa: use correct symbol for the end of .rodata

2019-10-21T06:48:29+00:00

Use correct symbol for the end of .rodata section when dumping virtual memory layout. This fixes odd rodata size with XIP kernel. Signed-off-by: Max Filippov

xtensa: remove free_initrd_mem

2019-08-27T01:19:04+00:00

The xtensa free_initrd_mem() verifies that initrd is mapped and then frees its memory using free_reserved_area(). The initrd is considered mapped when its memory was successfully reserved with mem_reserve(). Resetting initrd_start to 0 in case of mem_reserve() failure allows to switch to generic free_initrd_mem() implementation. Signed-off-by: Mike Rapoport Message-Id: <1563977432-8376-1-git-send-email-rppt@linux.ibm.com> Signed-off-by: Max Filippov

Merge tag 'xtensa-20190715' of git://github.com/jcmvbkbc/linux-xtensa

2019-07-16T19:17:07+00:00

Pull Xtensa updates from Max Filippov: - clean up PCI support code - add defconfig and DTS for the 'virt' board - abstract 'entry' and 'retw' uses in xtensa assembly in preparation for XEA3/NX pipeline support - random small cleanups * tag 'xtensa-20190715' of git://github.com/jcmvbkbc/linux-xtensa: xtensa: virt: add defconfig and DTS xtensa: abstract 'entry' and 'retw' in assembly code xtensa: One function call less in bootmem_init() xtensa: remove arch/xtensa/include/asm/types.h xtensa: use generic pcibios_set_master and pcibios_enable_device xtensa: drop dead PCI support code xtensa/PCI: Remove unused variable

Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2019-07-09T04:48:15+00:00

Pull force_sig() argument change from Eric Biederman: "A source of error over the years has been that force_sig has taken a task parameter when it is only safe to use force_sig with the current task. The force_sig function is built for delivering synchronous signals such as SIGSEGV where the userspace application caused a synchronous fault (such as a page fault) and the kernel responded with a signal. Because the name force_sig does not make this clear, and because the force_sig takes a task parameter the function force_sig has been abused for sending other kinds of signals over the years. Slowly those have been fixed when the oopses have been tracked down. This set of changes fixes the remaining abusers of force_sig and carefully rips out the task parameter from force_sig and friends making this kind of error almost impossible in the future" * 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace: (27 commits) signal/x86: Move tsk inside of CONFIG_MEMORY_FAILURE in do_sigbus signal: Remove the signal number and task parameters from force_sig_info signal: Factor force_sig_info_to_task out of force_sig_info signal: Generate the siginfo in force_sig signal: Move the computation of force into send_signal and correct it. signal: Properly set TRACE_SIGNAL_LOSE_INFO in __send_signal signal: Remove the task parameter from force_sig_fault signal: Use force_sig_fault_to_task for the two calls that don't deliver to current signal: Explicitly call force_sig_fault on current signal/unicore32: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from __do_user_fault signal/arm: Remove tsk parameter from ptrace_break signal/nds32: Remove tsk parameter from send_sigtrap signal/riscv: Remove tsk parameter from do_trap signal/sh: Remove tsk parameter from force_sig_info_fault signal/um: Remove task parameter from send_sigtrap signal/x86: Remove task parameter from send_sigtrap signal: Remove task parameter from force_sig_mceerr signal: Remove task parameter from force_sig signal: Remove task parameter from force_sigsegv ...

xtensa: abstract 'entry' and 'retw' in assembly code

2019-07-08T17:04:48+00:00

Provide abi_entry, abi_entry_default, abi_ret and abi_ret_default macros that allocate aligned stack frame in windowed and call0 ABIs. Provide XTENSA_SPILL_STACK_RESERVE macro that specifies required stack frame size when register spilling is involved. Replace all uses of 'entry' and 'retw' with the above macros. This makes most of the xtensa assembly code ready for XEA3 and call0 ABI. Signed-off-by: Max Filippov

xtensa: One function call less in bootmem_init()

2019-07-05T19:02:37+00:00

Avoid an extra function call by using a ternary operator instead of a conditional statement for a setting selection. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring Message-Id: <495c9f2e-7880-ee9a-5c61-eee598bb24c2@web.de> Signed-off-by: Max Filippov