kernel.git/arch/arm64/include/asm/efi.h, branch linux-4.9.y

arm64/efi: fix variable 'si' set but not used

2019-08-25T08:51:47Z

[ Upstream commit f1d4836201543e88ebe70237e67938168d5fab19 ] GCC throws out this warning on arm64. drivers/firmware/efi/libstub/arm-stub.c: In function 'efi_entry': drivers/firmware/efi/libstub/arm-stub.c:132:22: warning: variable 'si' set but not used [-Wunused-but-set-variable] Fix it by making free_screen_info() a static inline function. Acked-by: Will Deacon Signed-off-by: Qian Cai Signed-off-by: Catalin Marinas Signed-off-by: Sasha Levin

efi/libstub/arm64: Use hidden attribute for struct screen_info reference

2018-11-23T07:20:36Z

commit 760b61d76da6d6a99eb245ab61abf71ca5415cea upstream. To prevent the compiler from emitting absolute references to screen_info when building position independent code, redeclare the symbol with hidden visibility. Tested-by: Matthias Kaehlcke Signed-off-by: Ard Biesheuvel Cc: Linus Torvalds Cc: Matt Fleming Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20170818194947.19347-3-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar Signed-off-by: Nick Desaulniers Signed-off-by: Greg Kroah-Hartman

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2016-07-27T18:16:05Z

Pull arm64 updates from Catalin Marinas: - Kexec support for arm64 - Kprobes support - Expose MIDR_EL1 and REVIDR_EL1 CPU identification registers to sysfs - Trapping of user space cache maintenance operations and emulation in the kernel (CPU errata workaround) - Clean-up of the early page tables creation (kernel linear mapping, EFI run-time maps) to avoid splitting larger blocks (e.g. pmds) into smaller ones (e.g. ptes) - VDSO support for CLOCK_MONOTONIC_RAW in clock_gettime() - ARCH_HAS_KCOV enabled for arm64 - Optimise IP checksum helpers - SWIOTLB optimisation to only allocate/initialise the buffer if the available RAM is beyond the 32-bit mask - Properly handle the "nosmp" command line argument - Fix for the initialisation of the CPU debug state during early boot - vdso-offsets.h build dependency workaround - Build fix when RANDOMIZE_BASE is enabled with MODULES off * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (64 commits) arm64: arm: Fix-up the removal of the arm64 regs_query_register_name() prototype arm64: Only select ARM64_MODULE_PLTS if MODULES=y arm64: mm: run pgtable_page_ctor() on non-swapper translation table pages arm64: mm: make create_mapping_late() non-allocating arm64: Honor nosmp kernel command line option arm64: Fix incorrect per-cpu usage for boot CPU arm64: kprobes: Add KASAN instrumentation around stack accesses arm64: kprobes: Cleanup jprobe_return arm64: kprobes: Fix overflow when saving stack arm64: kprobes: WARN if attempting to step with PSTATE.D=1 arm64: debug: remove unused local_dbg_{enable, disable} macros arm64: debug: remove redundant spsr manipulation arm64: debug: unmask PSTATE.D earlier arm64: localise Image objcopy flags arm64: ptrace: remove extra define for CPSR's E bit kprobes: Add arm64 case in kprobe example module arm64: Add kernel return probes support (kretprobes) arm64: Add trampoline code for kretprobes arm64: kprobes instruction simulation support arm64: Treat all entry code as non-kprobe-able ...

arm64: efi: always map runtime services code and data regions down to pages

2016-07-01T10:56:26Z

To avoid triggering diagnostics in the MMU code that are finicky about splitting block mappings into more granular mappings, ensure that regions that are likely to appear in the Memory Attributes table as well as the UEFI memory map are always mapped down to pages. This way, we can use apply_to_page_range() instead of create_pgd_mapping() for the second pass, which cannot split or merge block entries, and operates strictly on PTEs. Note that this aligns the arm64 Memory Attributes table handling code with the ARM code, which already uses apply_to_page_range() to set the strict permissions. Signed-off-by: Ard Biesheuvel Signed-off-by: Catalin Marinas

efi: Convert efi_call_virt() to efi_call_virt_pointer()

2016-06-27T11:06:56Z

This commit makes a few slight modifications to the efi_call_virt() macro to get it to work with function pointers that are stored in locations other than efi.systab->runtime, and renames the macro to efi_call_virt_pointer(). The majority of the changes here are to pull these macros up into header files so that they can be accessed from outside of drivers/firmware/efi/runtime-wrappers.c. The most significant change not directly related to the code move is to add an extra "p" argument into the appropriate efi_call macros, and use that new argument in place of the, formerly hard-coded, efi.systab->runtime pointer. The last piece of the puzzle was to add an efi_call_virt() macro back into drivers/firmware/efi/runtime-wrappers.c to wrap around the new efi_call_virt_pointer() macro - this was mainly to keep the code from looking too cluttered by adding a bunch of extra references to efi.systab->runtime everywhere. Note that I also broke up the code in the efi_call_virt_pointer() macro a bit in the process of moving it. Signed-off-by: Alex Thorlton Signed-off-by: Matt Fleming Cc: Ard Biesheuvel Cc: Catalin Marinas Cc: Dimitri Sivanich Cc: Linus Torvalds Cc: Mark Rutland Cc: Peter Zijlstra Cc: Roy Franz Cc: Russ Anderson Cc: Russell King Cc: Thomas Gleixner Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1466839230-12781-5-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

arm64/efi: Enable runtime call flag checking

2016-04-28T09:34:11Z

Define ARCH_EFI_IRQ_FLAGS_MASK for arm64, which will enable the generic runtime wrapper code to detect when firmware erroneously modifies flags over a runtime services function call. Signed-off-by: Mark Rutland Signed-off-by: Matt Fleming Acked-by: Will Deacon Cc: Ard Biesheuvel Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dan Williams Cc: Leif Lindholm Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-38-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

arm64/efi: Move to generic {__,}efi_call_virt()

2016-04-28T09:34:07Z

Now there's a common template for {__,}efi_call_virt(), remove the duplicate logic from the arm64 EFI code. Signed-off-by: Mark Rutland Signed-off-by: Matt Fleming Reviewed-by: Ard Biesheuvel Acked-by: Will Deacon Cc: Borislav Petkov Cc: Catalin Marinas Cc: Leif Lindholm Cc: Peter Zijlstra Cc: Russell King Cc: Thomas Gleixner Cc: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-33-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

efifb: Enable the efi-framebuffer platform driver for ARM and arm64

2016-04-28T09:34:01Z

Allows the efifb driver to be built for ARM and arm64. This simply involves updating the Kconfig dependency expression, and supplying dummy versions of efifb_setup_from_dmi(). Signed-off-by: Ard Biesheuvel Signed-off-by: Matt Fleming Cc: Borislav Petkov Cc: David Herrmann Cc: Mark Rutland Cc: Peter Jones Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-25-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

arm64/efi/libstub: Make screen_info accessible to the UEFI stub

2016-04-28T09:33:59Z

Unlike on 32-bit ARM, where we need to pass the stub's version of struct screen_info to the kernel proper via a configuration table, on 64-bit ARM it simply involves making the core kernel's copy of struct screen_info visible to the stub by exposing an __efistub_ alias for it. Signed-off-by: Ard Biesheuvel Signed-off-by: Matt Fleming Acked-by: Will Deacon Cc: Borislav Petkov Cc: David Herrmann Cc: Mark Rutland Cc: Peter Jones Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-21-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar

efi/libstub: Move Graphics Output Protocol handling to generic code

2016-04-28T09:33:57Z

The Graphics Output Protocol code executes in the stub, so create a generic version based on the x86 version in libstub so that we can move other archs to it in subsequent patches. The new source file gop.c is added to the libstub build for all architectures, but only wired up for x86. Signed-off-by: Ard Biesheuvel Signed-off-by: Matt Fleming Cc: Borislav Petkov Cc: David Herrmann Cc: Mark Rutland Cc: Peter Jones Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1461614832-17633-18-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar