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2016-02-03efi: Runtime-wrapper: Get rid of the rtc_lock spinlockArd Biesheuvel1-24/+8
The rtc_lock spinlock aims to serialize access to the CMOS RTC between the UEFI firmware and the kernel drivers that use it directly. However, x86 is the only arch that performs such direct accesses, and that never uses the time related UEFI runtime services. Since no other UEFI enlightened architectures have a legcay CMOS RTC anyway, we can remove the rtc_lock spinlock entirely. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1454364428-494-7-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03efi/runtime-wrappers: Remove out of date comment regarding in_nmi()Ard Biesheuvel1-26/+0
This code is long gone, so remove the comment as well. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1454364428-494-6-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03efi: Add nonblocking option to efi_query_variable_store()Ard Biesheuvel1-2/+14
The function efi_query_variable_store() may be invoked by efivar_entry_set_nonblocking(), which itself takes care to only call a non-blocking version of the SetVariable() runtime wrapper. However, efi_query_variable_store() may call the SetVariable() wrapper directly, as well as the wrapper for QueryVariableInfo(), both of which could deadlock in the same way we are trying to prevent by calling efivar_entry_set_nonblocking() in the first place. So instead, modify efi_query_variable_store() to use the non-blocking variants of QueryVariableInfo() (and give up rather than free up space if the available space is below EFI_MIN_RESERVE) if invoked with the 'nonblocking' argument set to true. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1454364428-494-5-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03efi/runtime-wrappers: Add a nonblocking version of QueryVariableInfo()Ard Biesheuvel1-0/+22
This introduces a new runtime wrapper for the QueryVariableInfo() UEFI Runtime Service, which gives up immediately rather than spins on failure to grab the efi_runtime spinlock. This is required in the non-blocking path of the efi-pstore code. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1454364428-494-4-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03efi: Expose non-blocking set_variable() wrapper to efivarsArd Biesheuvel1-0/+1
Commit 6d80dba1c9fe ("efi: Provide a non-blocking SetVariable() operation") implemented a non-blocking alternative for the UEFI SetVariable() invocation performed by efivars, since it may occur in atomic context. However, this version of the function was never exposed via the efivars struct, so the non-blocking versions was not actually callable. Fix that. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Fixes: 6d80dba1c9fe ("efi: Provide a non-blocking SetVariable() operation") Link: http://lkml.kernel.org/r/1454364428-494-2-git-send-email-matt@codeblueprint.co.uk Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-02-03Merge branch 'linus' into efi/core, to refresh the branch and to pick up ↵Ingo Molnar12-37/+523
recent fixes Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-01-21UBSAN: run-time undefined behavior sanity checkerAndrey Ryabinin1-0/+1
UBSAN uses compile-time instrumentation to catch undefined behavior (UB). Compiler inserts code that perform certain kinds of checks before operations that could cause UB. If check fails (i.e. UB detected) __ubsan_handle_* function called to print error message. So the most of the work is done by compiler. This patch just implements ubsan handlers printing errors. GCC has this capability since 4.9.x [1] (see -fsanitize=undefined option and its suboptions). However GCC 5.x has more checkers implemented [2]. Article [3] has a bit more details about UBSAN in the GCC. [1] - https://gcc.gnu.org/onlinedocs/gcc-4.9.0/gcc/Debugging-Options.html [2] - https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html [3] - http://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/ Issues which UBSAN has found thus far are: Found bugs: * out-of-bounds access - 97840cb67ff5 ("netfilter: nfnetlink: fix insufficient validation in nfnetlink_bind") undefined shifts: * d48458d4a768 ("jbd2: use a better hash function for the revoke table") * 10632008b9e1 ("clockevents: Prevent shift out of bounds") * 'x << -1' shift in ext4 - http://lkml.kernel.org/r/<5444EF21.8020501@samsung.com> * undefined rol32(0) - http://lkml.kernel.org/r/<1449198241-20654-1-git-send-email-sasha.levin@oracle.com> * undefined dirty_ratelimit calculation - http://lkml.kernel.org/r/<566594E2.3050306@odin.com> * undefined roundown_pow_of_two(0) - http://lkml.kernel.org/r/<1449156616-11474-1-git-send-email-sasha.levin@oracle.com> * [WONTFIX] undefined shift in __bpf_prog_run - http://lkml.kernel.org/r/<CACT4Y+ZxoR3UjLgcNdUm4fECLMx2VdtfrENMtRRCdgHB2n0bJA@mail.gmail.com> WONTFIX here because it should be fixed in bpf program, not in kernel. signed overflows: * 32a8df4e0b33f ("sched: Fix odd values in effective_load() calculations") * mul overflow in ntp - http://lkml.kernel.org/r/<1449175608-1146-1-git-send-email-sasha.levin@oracle.com> * incorrect conversion into rtc_time in rtc_time64_to_tm() - http://lkml.kernel.org/r/<1449187944-11730-1-git-send-email-sasha.levin@oracle.com> * unvalidated timespec in io_getevents() - http://lkml.kernel.org/r/<CACT4Y+bBxVYLQ6LtOKrKtnLthqLHcw-BMp3aqP3mjdAvr9FULQ@mail.gmail.com> * [NOTABUG] signed overflow in ktime_add_safe() - http://lkml.kernel.org/r/<CACT4Y+aJ4muRnWxsUe1CMnA6P8nooO33kwG-c8YZg=0Xc8rJqw@mail.gmail.com> [akpm@linux-foundation.org: fix unused local warning] [akpm@linux-foundation.org: fix __int128 build woes] Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sasha Levin <sasha.levin@oracle.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Michal Marek <mmarek@suse.cz> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Yury Gribov <y.gribov@samsung.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Kostya Serebryany <kcc@google.com> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-21drivers/firmware/broadcom/bcm47xx_nvram.c: use __ioread32_copy() instead of ↵Stephen Boyd1-8/+3
open-coding Now that we have a generic library function for this, replace the open-coded instance. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Hauke Mehrtens <hauke@hauke-m.de> Cc: <zajec5@gmail.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Bjorn Andersson <bjorn.andersson@sonymobile.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-01-16Merge branch 'dmi-for-linus' of ↵Linus Torvalds1-20/+42
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging Pull dmi updates from Jean Delvare. * 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: firmware: dmi_scan: Save SMBIOS Type 9 System Slots firmware: dmi_scan: Fix dmi_find_device description firmware: dmi_scan: Clarify dmi_save_extended_devices firmware: dmi_scan: Optimize dmi_save_extended_devices
2016-01-16firmware: dmi_scan: Save SMBIOS Type 9 System SlotsJordan Hargrave1-15/+36
Save SMBIOS Type 9 System Slots during DMI scan. PCI address of onboard devices was already saved but not for slots. Signed-off-by: Jordan Hargrave <jordan_hargrave@dell.com> Signed-off-by: Jean Delvare <jdelvare@suse.de>
2016-01-16firmware: dmi_scan: Fix dmi_find_device descriptionJean Delvare1-1/+1
The description of dmi_find_device was apparently copied from a similar function in a different subsystem, but the parameter names were not adjusted as needed. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Andrey Panin <pazke@donpac.ru>
2016-01-16firmware: dmi_scan: Clarify dmi_save_extended_devicesJean Delvare1-6/+5
Get rid of the arbitrary 5-byte pointer offset, it served no purpose and made it harder to match the code with the SMBIOS specification. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Jordan Hargrave <jordan_hargrave@dell.com> Cc: Narendra K <narendra_k@dell.com>
2016-01-16firmware: dmi_scan: Optimize dmi_save_extended_devicesJean Delvare1-2/+4
Calling dmi_string_nosave isn't cheap, so avoid calling it twice in a row for the same string. Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Jordan Hargrave <jordan_hargrave@dell.com> Cc: Narendra K <narendra_k@dell.com>
2016-01-15Merge branch 'for-linus' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree updates from Jiri Kosina. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: floppy: make local variable non-static exynos: fixes an incorrect header guard dt-bindings: fixes some incorrect header guards cpufreq-dt: correct dead link in documentation cpufreq: ARM big LITTLE: correct dead link in documentation treewide: Fix typos in printk Documentation: filesystem: Fix typo in fs/eventfd.c fs/super.c: use && instead of & for warn_on condition Documentation: fix sysfs-ptp lib: scatterlist: fix Kconfig description
2016-01-13efi: include asm/early_ioremap.h not asm/efi.h to get early_memremapArd Biesheuvel1-1/+1
The code in efi.c uses early_memremap(), but relies on a transitive include rather than including asm/early_ioremap.h directly, since this header did not exist on ia64. Commit f7d924894265 ("arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM") attempted to work around this by including asm/efi.h, which transitively includes asm/early_ioremap.h on most architectures. However, since asm/efi.h does not exist on ia64 either, this is not much of an improvement. Now that we have created an asm/early_ioremap.h for ia64, we can just include it directly. Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
2016-01-12Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-armLinus Torvalds6-3/+122
Pull ARM updates from Russell King: - UEFI boot and runtime services support for ARM from Ard Biesheuvel and Roy Franz. - DT compatibility with old atags booting protocol for Nokia N900 devices from Ivaylo Dimitrov. - PSCI firmware interface using new arm-smc calling convention from Jens Wiklander. - Runtime patching for udiv/sdiv instructions for ARMv7 CPUs that support these instructions from Nicolas Pitre. - L2x0 cache updates from Dirk B and Linus Walleij. - Randconfig fixes from Arnd Bergmann. - ARMv7M (nommu) updates from Ezequiel Garcia * 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: (34 commits) ARM: 8481/2: drivers: psci: replace psci firmware calls ARM: 8480/2: arm64: add implementation for arm-smccc ARM: 8479/2: add implementation for arm-smccc ARM: 8478/2: arm/arm64: add arm-smccc ARM: 8494/1: mm: Enable PXN when running non-LPAE kernel on LPAE processor ARM: 8496/1: OMAP: RX51: save ATAGS data in the early boot stage ARM: 8495/1: ATAGS: move save_atags() to arch/arm/include/asm/setup.h ARM: 8452/3: PJ4: make coprocessor access sequences buildable in Thumb2 mode ARM: 8482/1: l2x0: make it possible to disable outer sync from DT ARM: 8488/1: Make IPI_CPU_BACKTRACE a "non-secure" SGI ARM: 8487/1: Remove IPI_CALL_FUNC_SINGLE ARM: 8485/1: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook ARM: 8484/1: Documentation: l2c2x0: Mention separate controllers explicitly ARM: 8483/1: Documentation: l2c: Rename l2cc to l2c2x0 ARM: 8477/1: runtime patch udiv/sdiv instructions into __aeabi_{u}idiv() ARM: 8476/1: VDSO: use PTR_ERR_OR_ZERO for vma check ARM: 8453/2: proc-v7.S: don't locate temporary stack space in .text section ARM: add UEFI stub support ARM: wire up UEFI init and runtime support ARM: only consider memblocks with NOMAP cleared for linear mapping ...
2016-01-12Merge tag 'arm64-upstream' of ↵Linus Torvalds5-2/+351
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Will Deacon: "Here is the core arm64 queue for 4.5. As you might expect, the Christmas break resulted in a number of patches not making the final cut, so 4.6 is likely to be larger than usual. There's still some useful stuff here, however, and it's detailed below. The EFI changes have been Reviewed-by Matt and the memblock change got an "OK" from akpm. Summary: - Support for a separate IRQ stack, although we haven't reduced the size of our thread stack just yet since we don't have enough data to determine a safe value - Refactoring of our EFI initialisation and runtime code into drivers/firmware/efi/ so that it can be reused by arch/arm/. - Ftrace improvements when unwinding in the function graph tracer - Document our silicon errata handling process - Cache flushing optimisation when mapping executable pages - Support for hugetlb mappings using the contiguous hint in the pte" * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (45 commits) arm64: head.S: use memset to clear BSS efi: stub: define DISABLE_BRANCH_PROFILING for all architectures arm64: entry: remove pointless SPSR mode check arm64: mm: move pgd_cache initialisation to pgtable_cache_init arm64: module: avoid undefined shift behavior in reloc_data() arm64: module: fix relocation of movz instruction with negative immediate arm64: traps: address fallout from printk -> pr_* conversion arm64: ftrace: fix a stack tracer's output under function graph tracer arm64: pass a task parameter to unwind_frame() arm64: ftrace: modify a stack frame in a safe way arm64: remove irq_count and do_softirq_own_stack() arm64: hugetlb: add support for PTE contiguous bit arm64: Use PoU cache instr for I/D coherency arm64: Defer dcache flush in __cpu_copy_user_page arm64: reduce stack use in irq_handler arm64: mm: ensure that the zero page is visible to the page table walker arm64: Documentation: add list of software workarounds for errata arm64: mm: place __cpu_setup in .text arm64: cmpxchg: Don't incldue linux/mmdebug.h arm64: mm: fold alternatives into .init ...
2016-01-12Merge branch 'devel-stable' into for-linusRussell King7-1/+447
2016-01-08firmware: dmi_scan: Fix UUID endianness for SMBIOS >= 2.6Andrea Arcangeli1-3/+3
The dmi_ver wasn't updated correctly before the dmi_decode method run to save the uuid. That resulted in "dmidecode -s system-uuid" and /sys/class/dmi/id/product_uuid disagreeing. The latter was buggy and this fixes it. Reported-by: Federico Simoncelli <fsimonce@redhat.com> Fixes: 9f9c9cbb6057 ("drivers/firmware/dmi_scan.c: fetch dmi version from SMBIOS if it exists") Fixes: 79bae42d51a5 ("dmi_scan: refactor dmi_scan_machine(), {smbios,dmi}_present()") Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Jean Delvare <jdelvare@suse.de>
2016-01-06efi: stub: define DISABLE_BRANCH_PROFILING for all architecturesArd Biesheuvel1-2/+2
This moves the DISABLE_BRANCH_PROFILING define from the x86 specific to the general CFLAGS definition for the stub. This fixes build errors when building for arm64 with CONFIG_PROFILE_ALL_BRANCHES_ENABLED. Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Reported-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-01-04ARM: 8481/2: drivers: psci: replace psci firmware callsJens Wiklander1-2/+21
Switch to use a generic interface for issuing SMC/HVC based on ARM SMC Calling Convention. Removes now the now unused psci-call.S. Acked-by: Will Deacon <will.deacon@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2016-01-04ARM: 8478/2: arm/arm64: add arm-smcccJens Wiklander1-0/+3
Adds helpers to do SMC and HVC based on ARM SMC Calling Convention. CONFIG_HAVE_ARM_SMCCC is enabled for architectures that may support the SMC or HVC instruction. It's the responsibility of the caller to know if the SMC instruction is supported by the platform. This patch doesn't provide an implementation of the declared functions. Later patches will bring in implementations and set CONFIG_HAVE_ARM_SMCCC for ARM and ARM64 respectively. Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-12-14x86/efi-bgrt: Fix kernel panic when mapping BGRT dataSai Praneeth1-32/+0
Starting with this commit 35eb8b81edd4 ("x86/efi: Build our own page table structures") efi regions have a separate page directory called "efi_pgd". In order to access any efi region we have to first shift %cr3 to this page table. In the bgrt code we are trying to copy bgrt_header and image, but these regions fall under "EFI_BOOT_SERVICES_DATA" and to access these regions we have to shift %cr3 to efi_pgd and not doing so will cause page fault as shown below. [ 0.251599] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 0, 1GB 4 [ 0.259126] Freeing SMP alternatives memory: 32K (ffffffff8230e000 - ffffffff82316000) [ 0.271803] BUG: unable to handle kernel paging request at fffffffefce35002 [ 0.279740] IP: [<ffffffff821bca49>] efi_bgrt_init+0x144/0x1fd [ 0.286383] PGD 300f067 PUD 0 [ 0.289879] Oops: 0000 [#1] SMP [ 0.293566] Modules linked in: [ 0.297039] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc1-eywa-eywa-built-in-47041+ #2 [ 0.306619] Hardware name: Intel Corporation Skylake Client platform/Skylake Y LPDDR3 RVP3, BIOS SKLSE2R1.R00.B104.B01.1511110114 11/11/2015 [ 0.320925] task: ffffffff820134c0 ti: ffffffff82000000 task.ti: ffffffff82000000 [ 0.329420] RIP: 0010:[<ffffffff821bca49>] [<ffffffff821bca49>] efi_bgrt_init+0x144/0x1fd [ 0.338821] RSP: 0000:ffffffff82003f18 EFLAGS: 00010246 [ 0.344852] RAX: fffffffefce35000 RBX: fffffffefce35000 RCX: fffffffefce2b000 [ 0.352952] RDX: 000000008a82b000 RSI: ffffffff8235bb80 RDI: 000000008a835000 [ 0.361050] RBP: ffffffff82003f30 R08: 000000008a865000 R09: ffffffffff202850 [ 0.369149] R10: ffffffff811ad62f R11: 0000000000000000 R12: 0000000000000000 [ 0.377248] R13: ffff88016dbaea40 R14: ffffffff822622c0 R15: ffffffff82003fb0 [ 0.385348] FS: 0000000000000000(0000) GS:ffff88016d800000(0000) knlGS:0000000000000000 [ 0.394533] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 0.401054] CR2: fffffffefce35002 CR3: 000000000300c000 CR4: 00000000003406f0 [ 0.409153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 0.417252] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 0.425350] Stack: [ 0.427638] ffffffffffffffff ffffffff82256900 ffff88016dbaea40 ffffffff82003f40 [ 0.436086] ffffffff821bbce0 ffffffff82003f88 ffffffff8219c0c2 0000000000000000 [ 0.444533] ffffffff8219ba4a ffffffff822622c0 0000000000083000 00000000ffffffff [ 0.452978] Call Trace: [ 0.455763] [<ffffffff821bbce0>] efi_late_init+0x9/0xb [ 0.461697] [<ffffffff8219c0c2>] start_kernel+0x463/0x47f [ 0.467928] [<ffffffff8219ba4a>] ? set_init_arg+0x55/0x55 [ 0.474159] [<ffffffff8219b120>] ? early_idt_handler_array+0x120/0x120 [ 0.481669] [<ffffffff8219b5ee>] x86_64_start_reservations+0x2a/0x2c [ 0.488982] [<ffffffff8219b72d>] x86_64_start_kernel+0x13d/0x14c [ 0.495897] Code: 00 41 b4 01 48 8b 78 28 e8 09 36 01 00 48 85 c0 48 89 c3 75 13 48 c7 c7 f8 ac d3 81 31 c0 e8 d7 3b fb fe e9 b5 00 00 00 45 84 e4 <44> 8b 6b 02 74 0d be 06 00 00 00 48 89 df e8 ae 34 0$ [ 0.518151] RIP [<ffffffff821bca49>] efi_bgrt_init+0x144/0x1fd [ 0.524888] RSP <ffffffff82003f18> [ 0.528851] CR2: fffffffefce35002 [ 0.532615] ---[ end trace 7b06521e6ebf2aea ]--- [ 0.537852] Kernel panic - not syncing: Attempted to kill the idle task! As said above one way to fix this bug is to shift %cr3 to efi_pgd but we are not doing that way because it leaks inner details of how we switch to EFI page tables into a new call site and it also adds duplicate code. Instead, we remove the call to efi_lookup_mapped_addr() and always perform early_mem*() instead of early_io*() because we want to remap RAM regions and not I/O regions. We also delete efi_lookup_mapped_addr() because we are no longer using it. Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya@intel.com> Reported-by: Wendy Wang <wendy.wang@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Ricardo Neri <ricardo.neri@intel.com> Cc: Ravi Shankar <ravi.v.shankar@intel.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
2015-12-14efi/esrt: Don't preformat nameRasmus Villemoes1-4/+1
kobject_init_and_add takes a format string+args, so there's no reason to do this formatting in advance. Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Peter Jones <pjones@redhat.com> Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
2015-12-14ARM: add UEFI stub supportRoy Franz3-1/+97
This patch adds EFI stub support for the ARM Linux kernel. The EFI stub operates similarly to the x86 and arm64 stubs: it is a shim between the EFI firmware and the normal zImage entry point, and sets up the environment that the zImage is expecting. This includes optionally loading the initrd and device tree from the system partition based on the kernel command line. Signed-off-by: Roy Franz <roy.franz@linaro.org> Tested-by: Ryan Harkin <ryan.harkin@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2015-12-13ARM: wire up UEFI init and runtime supportArd Biesheuvel1-0/+1
This adds support to the kernel proper for booting via UEFI. It shares most of the code with arm64, so this patch mostly just wires it up for use with ARM. Note that this does not include the EFI stub, it is added in a subsequent patch. Tested-by: Ryan Harkin <ryan.harkin@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
2015-12-09arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARMArd Biesheuvel3-35/+22
This refactors the EFI init and runtime code that will be shared between arm64 and ARM so that it can be built for both archs. Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-12-09arm64/efi: split off EFI init and runtime code for reuse by 32-bit ARMArd Biesheuvel3-0/+362
This splits off the early EFI init and runtime code that - discovers the EFI params and the memory map from the FDT, and installs the memblocks and config tables. - prepares and installs the EFI page tables so that UEFI Runtime Services can be invoked at the virtual address installed by the stub. This will allow it to be reused for 32-bit ARM. Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-12-08treewide: Fix typos in printkMasanari Iida1-1/+1
This patch fix multiple spelling typos found in various part of kernel. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2015-11-11Merge tag 'armsoc-drivers' of ↵Linus Torvalds6-14/+1161
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC driver updates from Olof Johansson: "As we've enabled multiplatform kernels on ARM, and greatly done away with the contents under arch/arm/mach-*, there's still need for SoC-related drivers to go somewhere. Many of them go in through other driver trees, but we still have drivers/soc to hold some of the "doesn't fit anywhere" lowlevel code that might be shared between ARM and ARM64 (or just in general makes sense to not have under the architecture directory). This branch contains mostly such code: - Drivers for qualcomm SoCs for SMEM, SMD and SMD-RPM, used to communicate with power management blocks on these SoCs for use by clock, regulator and bus frequency drivers. - Allwinner Reduced Serial Bus driver, again used to communicate with PMICs. - Drivers for ARM's SCPI (System Control Processor). Not to be confused with PSCI (Power State Coordination Interface). SCPI is used to communicate with the assistant embedded cores doing power management, and we have yet to see how many of them will implement this for their hardware vs abstracting in other ways (or not at all like in the past). - To make confusion between SCPI and PSCI more likely, this release also includes an update of PSCI to interface version 1.0. - Rockchip support for power domains. - A driver to talk to the firmware on Raspberry Pi" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (57 commits) soc: qcom: smd-rpm: Correct size of outgoing message bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus bus: sunxi-rsb: Add Allwinner Reduced Serial Bus (RSB) controller bindings ARM: bcm2835: add mutual inclusion protection drivers: psci: make PSCI 1.0 functions initialization version dependent dt-bindings: Correct paths in Rockchip power domains binding document soc: rockchip: power-domain: don't try to print the clock name in error case soc: qcom/smem: add HWSPINLOCK dependency clk: berlin: add cpuclk ARM: berlin: dts: add CLKID_CPU for BG2Q ARM: bcm2835: Add the Raspberry Pi firmware driver soc: qcom: smem: Move RPM message ram out of smem DT node soc: qcom: smd-rpm: Correct the active vs sleep state flagging soc: qcom: smd: delete unneeded of_node_put firmware: qcom-scm: build for correct architecture level soc: qcom: smd: Correct SMEM items for upper channels qcom-scm: add missing prototype for qcom_scm_is_available() qcom-scm: fix endianess issue in __qcom_scm_is_call_available soc: qcom: smd: Reject send of too big packets soc: qcom: smd: Handle big endian CPUs ...
2015-11-05Merge tag 'please-pull-pstore' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux Pull pstore updates from Tony Luck: "Half dozen small cleanups plus change to allow pstore backend drivers to be unloaded" * tag 'please-pull-pstore' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux: pstore: fix code comment to match code efi-pstore: fix kernel-doc argument name pstore: Fix return type of pstore_is_mounted() pstore: add pstore unregister pstore: add a helper function pstore_register_kmsg pstore: add vmalloc error check
2015-11-05Merge tag 'arm64-upstream' of ↵Linus Torvalds5-15/+179
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 updates from Catalin Marinas: - "genirq: Introduce generic irq migration for cpu hotunplugged" patch merged from tip/irq/for-arm to allow the arm64-specific part to be upstreamed via the arm64 tree - CPU feature detection reworked to cope with heterogeneous systems where CPUs may not have exactly the same features. The features reported by the kernel via internal data structures or ELF_HWCAP are delayed until all the CPUs are up (and before user space starts) - Support for 16KB pages, with the additional bonus of a 36-bit VA space, though the latter only depending on EXPERT - Implement native {relaxed, acquire, release} atomics for arm64 - New ASID allocation algorithm which avoids IPI on roll-over, together with TLB invalidation optimisations (using local vs global where feasible) - KASan support for arm64 - EFI_STUB clean-up and isolation for the kernel proper (required by KASan) - copy_{to,from,in}_user optimisations (sharing the memcpy template) - perf: moving arm64 to the arm32/64 shared PMU framework - L1_CACHE_BYTES increased to 128 to accommodate Cavium hardware - Support for the contiguous PTE hint on kernel mapping (16 consecutive entries may be able to use a single TLB entry) - Generic CONFIG_HZ now used on arm64 - defconfig updates * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (91 commits) arm64/efi: fix libstub build under CONFIG_MODVERSIONS ARM64: Enable multi-core scheduler support by default arm64/efi: move arm64 specific stub C code to libstub arm64: page-align sections for DEBUG_RODATA arm64: Fix build with CONFIG_ZONE_DMA=n arm64: Fix compat register mappings arm64: Increase the max granular size arm64: remove bogus TASK_SIZE_64 check arm64: make Timer Interrupt Frequency selectable arm64/mm: use PAGE_ALIGNED instead of IS_ALIGNED arm64: cachetype: fix definitions of ICACHEF_* flags arm64: cpufeature: declare enable_cpu_capabilities as static genirq: Make the cpuhotplug migration code less noisy arm64: Constify hwcap name string arrays arm64/kvm: Make use of the system wide safe values arm64/debug: Make use of the system wide safe value arm64: Move FP/ASIMD hwcap handling to common code arm64/HWCAP: Use system wide safe values arm64/capabilities: Make use of system wide safe value arm64: Delay cpu feature capability checks ...
2015-11-03efi-pstore: fix kernel-doc argument nameGeliang Tang1-1/+1
The first argument name in the kernel-doc argument list for efi_pstore_scan_sysfs_enter() was slightly off. Fix it for the kernel doc. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2015-11-02arm64/efi: fix libstub build under CONFIG_MODVERSIONSArd Biesheuvel1-1/+1
Now that we strictly forbid absolute relocations in libstub code, make sure that we don't emit any when CONFIG_MODVERSIONS is enabled, by stripping the kcrctab sections from the object file. This fixes a build problem under CONFIG_MODVERSIONS=y. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-10-30arm64/efi: move arm64 specific stub C code to libstubArd Biesheuvel2-0/+71
Now that we added special handling to the C files in libstub, move the one remaining arm64 specific EFI stub C file to libstub as well, so that it gets the same treatment. This should prevent future changes from resulting in binaries that may execute incorrectly in UEFI context. With efi-entry.S the only remaining EFI stub source file under arch/arm64, we can also simplify the Makefile logic somewhat. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Tested-by: Jeremy Linton <jeremy.linton@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-10-28efi: Fix warning of int-to-pointer-cast on x86 32-bit buildsTaku Izumi1-2/+2
Commit: 0f96a99dab36 ("efi: Add "efi_fake_mem" boot option") introduced the following warning message: drivers/firmware/efi/fake_mem.c:186:20: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] new_memmap_phy was defined as a u64 value and cast to void*, causing a int-to-pointer-cast warning on x86 32-bit builds. However, since the void* type is inappropriate for a physical address, the definition of struct efi_memory_map::phys_map has been changed to phys_addr_t in the previous patch, and so the cast can be dropped entirely. This patch also changes the type of the "new_memmap_phy" variable from "u64" to "phys_addr_t" to align with the types of memblock_alloc() and struct efi_memory_map::phys_map. Reported-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> [ Removed void* cast, updated commit log] Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kamezawa.hiroyu@jp.fujitsu.com Cc: linux-efi@vger.kernel.org Cc: matt.fleming@intel.com Link: http://lkml.kernel.org/r/1445593697-1342-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-28efi: Use correct type for struct efi_memory_map::phys_mapArd Biesheuvel1-4/+4
We have been getting away with using a void* for the physical address of the UEFI memory map, since, even on 32-bit platforms with 64-bit physical addresses, no truncation takes place if the memory map has been allocated by the firmware (which only uses 1:1 virtually addressable memory), which is usually the case. However, commit: 0f96a99dab36 ("efi: Add "efi_fake_mem" boot option") adds code that clones and modifies the UEFI memory map, and the clone may live above 4 GB on 32-bit platforms. This means our use of void* for struct efi_memory_map::phys_map has graduated from 'incorrect but working' to 'incorrect and broken', and we need to fix it. So redefine struct efi_memory_map::phys_map as phys_addr_t, and get rid of a bunch of casts that are now unneeded. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: izumi.taku@jp.fujitsu.com Cc: kamezawa.hiroyu@jp.fujitsu.com Cc: linux-efi@vger.kernel.org Cc: matt.fleming@intel.com Link: http://lkml.kernel.org/r/1445593697-1342-1-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-26Merge tag 'arm/soc/for-4.4/rpi-drivers' of ↵Olof Johansson3-0/+268
https://github.com/Broadcom/stblinux into next/drivers This pull request contains the Raspberry Pi firmware driver, for communicating with the VPU which has exclusive control of some of the peripherals. Eric adds the actual firmware driver and Alexander fixes the header file which was missing include guards. * tag 'arm/soc/for-4.4/rpi-drivers' of https://github.com/Broadcom/stblinux: ARM: bcm2835: add mutual inclusion protection ARM: bcm2835: Add the Raspberry Pi firmware driver Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-23Merge branch 'drivers/psci2' into next/driversOlof Johansson1-3/+4
* drivers/psci2: drivers: psci: make PSCI 1.0 functions initialization version dependent Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-23drivers: psci: make PSCI 1.0 functions initialization version dependentLorenzo Pieralisi1-3/+4
The PSCI specifications [1] and the SMC calling convention mandate that unimplemented functions ids must return NOT_SUPPORTED (0xffffffff) if a function id is called but it is not implemented. Consequently, PSCI 1.0 function ids that require the 1.0 PSCI_FEATURES call to be initialized: CPU_SUSPEND (psci_init_cpu_suspend()) SYSTEM_SUSPEND (psci_init_system_suspend()) call the PSCI_FEATURES function id independently of the detected PSCI firmware version, since, if the PSCI_FEATURES function id is not implemented, it must return NOT_SUPPORTED according to the PSCI specifications, causing the initialization functions to fail as expected. Some existing PSCI implementations (ie Qemu PSCI emulation), do not comply with the SMC calling convention and fail if function ids that are not implemented are called from the OS, causing boot failures. To solve this issue, this patch adds code that checks the PSCI firmware version before calling PSCI 1.0 initialization functions so that the OS makes sure that it is calling 1.0 functions only if the firmware version detected is 1.0 or greater, therefore avoiding PSCI calls that are bound to fail and might cause system boot failures owing to non-compliant PSCI firmware implementations. [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0022c/DEN0022C_Power_State_Coordination_Interface.pdf Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Mark Rutland <mark.rutland@arm.com> Tested-by: Kevin Hilman <khilman@kernel.org> Acked-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-22Merge tag 'firmware/psci-1.0' of ↵Olof Johansson1-10/+97
git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux into next/drivers This pull request contains patches that enable PSCI 1.0 firmware features for arm/arm64 platforms: - Lorenzo Pieralisi adds support for the PSCI_FEATURES call, manages various 1.0 specifications updates (power state id and functions return values) and provides PSCI v1.0 DT bindings - Sudeep Holla implements PSCI v1.0 system suspend support to enable PSCI based suspend-to-RAM * tag 'firmware/psci-1.0' of git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux: drivers: firmware: psci: add system suspend support drivers: firmware: psci: define more generic PSCI_FN_NATIVE macro drivers: firmware: psci: add PSCI v1.0 DT bindings drivers: firmware: psci: add extended stateid power_state support drivers: firmware: psci: add PSCI_FEATURES call drivers: firmware: psci: move power_state handling to generic code drivers: firmware: psci: add INVALID_ADDRESS return value Signed-off-by: Olof Johansson <olof@lixom.net>
2015-10-16Merge tag 'qcom-soc-for-4.4' of git://codeaurora.org/quic/kernel/agross-msm ↵Arnd Bergmann2-4/+4
into next/drivers Pull "Qualcomm ARM Based SoC Updates for 4.4" from Andy Gross: * Implement id_table driver matching in SMD * Avoid NULL pointer exception on remove of SMEM * Reorder SMEM/SMD configs * Make qcom_smem_get() return a pointer * Handle big endian CPUs correctly in SMEM * Represent SMD channel layout in structures * Use __iowrite32_copy() in SMD * Remove use of VLAIs in SMD * Handle big endian CPUs correctly in SMD/RPM * Handle big endian CPUs corretly in SMD * Reject sending SMD packets that are too large * Fix endianness issue in SCM __qcom_scm_is_call_available * Add missing prototype for qcom_scm_is_available() * Correct SMEM items for upper channels * Use architecture level to build SCM correctly * Delete unneeded of_node_put in SMD * Correct active/slep state flagging in SMD/RPM * Move RPM message ram out of SMEM DT node * tag 'qcom-soc-for-4.4' of git://codeaurora.org/quic/kernel/agross-msm: soc: qcom: smem: Move RPM message ram out of smem DT node soc: qcom: smd-rpm: Correct the active vs sleep state flagging soc: qcom: smd: delete unneeded of_node_put firmware: qcom-scm: build for correct architecture level soc: qcom: smd: Correct SMEM items for upper channels qcom-scm: add missing prototype for qcom_scm_is_available() qcom-scm: fix endianess issue in __qcom_scm_is_call_available soc: qcom: smd: Reject send of too big packets soc: qcom: smd: Handle big endian CPUs soc: qcom: smd_rpm: Handle big endian CPUs soc: qcom: smd: Remove use of VLAIS soc: qcom: smd: Use __iowrite32_copy() instead of open-coding it soc: qcom: smd: Represent channel layout in structures soc: qcom: smem: Handle big endian CPUs soc: qcom: Make qcom_smem_get() return a pointer soc: qcom: Reorder SMEM/SMD configs soc: qcom: smem: Avoid NULL pointer exception on remove soc: qcom: smd: Implement id_table driver matching
2015-10-15ARM: bcm2835: Add the Raspberry Pi firmware driverEric Anholt3-0/+268
This gives us a function for making mailbox property channel requests of the firmware, which is most notable in that it will let us get and set clock rates. Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Stephen Warren <swarren@wwwdotorg.org>
2015-10-14firmware: qcom-scm: build for correct architecture levelArnd Bergmann1-1/+1
The ".arch_extension sec" directive is only available on ARMv6 or higher, so if we enable the SCM driver while building a kernel for an older CPU, we get a build error: /tmp/ccUyhMOY.s:130: Error: selected processor does not support ARM mode `smc #0' /tmp/ccUyhMOY.s:216: Error: selected processor does not support ARM mode `smc #0' /tmp/ccUyhMOY.s:373: Error: selected processor does not support ARM mode `smc #0' make[4]: *** [drivers/firmware/qcom_scm-32.o] Error 1 This changes the Makefile so we pass the ARMv7 architecture level both for the check and for the actual compilation of the scm driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-10-14qcom-scm: fix endianess issue in __qcom_scm_is_call_availableRob Clark1-3/+3
Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-10-14Merge tag 'arm-scpi-for-v4.4' of ↵Arnd Bergmann3-0/+791
git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into next/drivers Merge "ARM System Control and Power Interface(SCPI) support" from Sudeep Holla It adds support for the following features provided by SCP firmware using different subsystems in Linux: 1. SCPI mailbox protocol driver which using mailbox framework 2. Clocks provided by SCP using clock framework 3. CPU DVFS(cpufreq) using existing arm-big-little driver 4. SCPI based sensors including temperature sensors * tag 'arm-scpi-for-v4.4' of git://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux: hwmon: Support thermal zones registration for SCP temperature sensors hwmon: Support sensors exported via ARM SCP interface firmware: arm_scpi: Extend to support sensors Documentation: add DT bindings for ARM SCPI sensors cpufreq: arm_big_little: add SCPI interface driver clk: scpi: add support for cpufreq virtual device clk: add support for clocks provided by SCP(System Control Processor) firmware: add support for ARM System Control and Power Interface(SCPI) protocol Documentation: add DT binding for ARM System Control and Power Interface(SCPI) protocol
2015-10-14Merge tag 'efi-next' of ↵Ingo Molnar6-36/+307
git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into core/efi Pull v4.4 EFI updates from Matt Fleming: - Make the EFI System Resource Table (ESRT) driver explicitly non-modular by ripping out the module_* code since Kconfig doesn't allow it to be built as a module anyway. (Paul Gortmaker) - Make the x86 efi=debug kernel parameter, which enables EFI debug code and output, generic and usable by arm64. (Leif Lindholm) - Add support to the x86 EFI boot stub for 64-bit Graphics Output Protocol frame buffer addresses. (Matt Fleming) - Detect when the UEFI v2.5 EFI_PROPERTIES_TABLE feature is enabled in the firmware and set an efi.flags bit so the kernel knows when it can apply more strict runtime mapping attributes - Ard Biesheuvel - Auto-load the efi-pstore module on EFI systems, just like we currently do for the efivars module. (Ben Hutchings) - Add "efi_fake_mem" kernel parameter which allows the system's EFI memory map to be updated with additional attributes for specific memory ranges. This is useful for testing the kernel code that handles the EFI_MEMORY_MORE_RELIABLE memmap bit even if your firmware doesn't include support. (Taku Izumi) Note: there is a semantic conflict between the following two commits: 8a53554e12e9 ("x86/efi: Fix multiple GOP device support") ae2ee627dc87 ("efifb: Add support for 64-bit frame buffer addresses") I fixed up the interaction in the merge commit, changing the type of current_fb_base from u32 to u64. Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-14Merge branch 'x86/urgent' into core/efi, to pick up a pending EFI fixIngo Molnar9-25/+535
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-12arm64: add KASAN supportAndrey Ryabinin1-0/+8
This patch adds arch specific code for kernel address sanitizer (see Documentation/kasan.txt). 1/8 of kernel addresses reserved for shadow memory. There was no big enough hole for this, so virtual addresses for shadow were stolen from vmalloc area. At early boot stage the whole shadow region populated with just one physical page (kasan_zero_page). Later, this page reused as readonly zero shadow for some memory that KASan currently don't track (vmalloc). After mapping the physical memory, pages for shadow memory are allocated and mapped. Functions like memset/memmove/memcpy do a lot of memory accesses. If bad pointer passed to one of these function it is important to catch this. Compiler's instrumentation cannot do this since these functions are written in assembly. KASan replaces memory functions with manually instrumented variants. Original functions declared as weak symbols so strong definitions in mm/kasan/kasan.c could replace them. Original functions have aliases with '__' prefix in name, so we could call non-instrumented variant if needed. Some files built without kasan instrumentation (e.g. mm/slub.c). Original mem* function replaced (via #define) with prefixed variants to disable memory access checks for such files. Signed-off-by: Andrey Ryabinin <ryabinin.a.a@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-10-12arm64/efi: isolate EFI stub from the kernel properArd Biesheuvel2-6/+90
Since arm64 does not use a builtin decompressor, the EFI stub is built into the kernel proper. So far, this has been working fine, but actually, since the stub is in fact a PE/COFF relocatable binary that is executed at an unknown offset in the 1:1 mapping provided by the UEFI firmware, we should not be seamlessly sharing code with the kernel proper, which is a position dependent executable linked at a high virtual offset. So instead, separate the contents of libstub and its dependencies, by putting them into their own namespace by prefixing all of its symbols with __efistub. This way, we have tight control over what parts of the kernel proper are referenced by the stub. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Matt Fleming <matt.fleming@intel.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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