#ifndef __PERF_ENV_H #define __PERF_ENV_H #include #include "cpumap.h" struct cpu_topology_map { int socket_id; int core_id; }; struct cpu_cache_level { u32 level; u32 line_size; u32 sets; u32 ways; char *type; char *size; char *map; }; struct numa_node { u32 node; u64 mem_total; u64 mem_free; struct cpu_map *map; }; struct perf_env { char *hostname; char *os_release; char *version; char *arch; int nr_cpus_online; int nr_cpus_avail; char *cpu_desc; char *cpuid; unsigned long long total_mem; unsigned int msr_pmu_type; int nr_cmdline; int nr_sibling_cores; int nr_sibling_threads; int nr_numa_nodes; int nr_pmu_mappings; int nr_groups; char *cmdline; const char **cmdline_argv; char *sibling_cores; char *sibling_threads; char *pmu_mappings; struct cpu_topology_map *cpu; struct cpu_cache_level *caches; int caches_cnt; struct numa_node *numa_nodes; }; extern struct perf_env perf_env; void perf_env__exit(struct perf_env *env); int perf_env__set_cmdline(struct perf_env *env, int argc, const char *argv[]); int perf_env__read_cpu_topology_map(struct perf_env *env); void cpu_cache_level__free(struct cpu_cache_level *cache); #endif /* __PERF_ENV_H */ ion value='packet-loop-back'>packet-loop-back net-next plumbingsTobias Klauser
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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /include/dt-bindings/clock/exynos-audss-clk.h
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/dt-bindings/clock/exynos-audss-clk.h')