/* * Generator for GIMPLE pass related boilerplate code/data * * Supports gcc 4.5-6 * * Usage: * * 1. before inclusion define PASS_NAME * 2. before inclusion define NO_* for unimplemented callbacks * NO_GATE * NO_EXECUTE * 3. before inclusion define PROPERTIES_* and TODO_FLAGS_* to override * the default 0 values * 4. for convenience, all the above will be undefined after inclusion! * 5. the only exported name is make_PASS_NAME_pass() to register with gcc */ #ifndef PASS_NAME #error at least PASS_NAME must be defined #else #define __GCC_PLUGIN_STRINGIFY(n) #n #define _GCC_PLUGIN_STRINGIFY(n) __GCC_PLUGIN_STRINGIFY(n) #define _GCC_PLUGIN_CONCAT2(x, y) x ## y #define _GCC_PLUGIN_CONCAT3(x, y, z) x ## y ## z #define __PASS_NAME_PASS_DATA(n) _GCC_PLUGIN_CONCAT2(n, _pass_data) #define _PASS_NAME_PASS_DATA __PASS_NAME_PASS_DATA(PASS_NAME) #define __PASS_NAME_PASS(n) _GCC_PLUGIN_CONCAT2(n, _pass) #define _PASS_NAME_PASS __PASS_NAME_PASS(PASS_NAME) #define _PASS_NAME_NAME _GCC_PLUGIN_STRINGIFY(PASS_NAME) #define __MAKE_PASS_NAME_PASS(n) _GCC_PLUGIN_CONCAT3(make_, n, _pass) #define _MAKE_PASS_NAME_PASS __MAKE_PASS_NAME_PASS(PASS_NAME) #ifdef NO_GATE #define _GATE NULL #define _HAS_GATE false #else #define __GATE(n) _GCC_PLUGIN_CONCAT2(n, _gate) #define _GATE __GATE(PASS_NAME) #define _HAS_GATE true #endif #ifdef NO_EXECUTE #define _EXECUTE NULL #define _HAS_EXECUTE false #else #define __EXECUTE(n) _GCC_PLUGIN_CONCAT2(n, _execute) #define _EXECUTE __EXECUTE(PASS_NAME) #define _HAS_EXECUTE true #endif #ifndef PROPERTIES_REQUIRED #define PROPERTIES_REQUIRED 0 #endif #ifndef PROPERTIES_PROVIDED #define PROPERTIES_PROVIDED 0 #endif #ifndef PROPERTIES_DESTROYED #define PROPERTIES_DESTROYED 0 #endif #ifndef TODO_FLAGS_START #define TODO_FLAGS_START 0 #endif #ifndef TODO_FLAGS_FINISH #define TODO_FLAGS_FINISH 0 #endif #if BUILDING_GCC_VERSION >= 4009 namespace { static const pass_data _PASS_NAME_PASS_DATA = { #else static struct gimple_opt_pass _PASS_NAME_PASS = { .pass = { #endif .type = GIMPLE_PASS, .name = _PASS_NAME_NAME, #if BUILDING_GCC_VERSION >= 4008 .optinfo_flags = OPTGROUP_NONE, #endif #if BUILDING_GCC_VERSION >= 5000 #elif BUILDING_GCC_VERSION == 4009 .has_gate = _HAS_GATE, .has_execute = _HAS_EXECUTE, #else .gate = _GATE, .execute = _EXECUTE, .sub = NULL, .next = NULL, .static_pass_number = 0, #endif .tv_id = TV_NONE, .properties_required = PROPERTIES_REQUIRED, .properties_provided = PROPERTIES_PROVIDED, .properties_destroyed = PROPERTIES_DESTROYED, .todo_flags_start = TODO_FLAGS_START, .todo_flags_finish = TODO_FLAGS_FINISH, #if BUILDING_GCC_VERSION < 4009 } #endif }; #if BUILDING_GCC_VERSION >= 4009 class _PASS_NAME_PASS : public gimple_opt_pass { public: _PASS_NAME_PASS() : gimple_opt_pass(_PASS_NAME_PASS_DATA, g) {} #ifndef NO_GATE #if BUILDING_GCC_VERSION >= 5000 virtual bool gate(function *) { return _GATE(); } #else virtual bool gate(void) { return _GATE(); } #endif #endif virtual opt_pass * clone () { return new _PASS_NAME_PASS(); } #ifndef NO_EXECUTE #if BUILDING_GCC_VERSION >= 5000 virtual unsigned int execute(function *) { return _EXECUTE(); } #else virtual unsigned int execute(void) { return _EXECUTE(); } #endif #endif }; } opt_pass *_MAKE_PASS_NAME_PASS(void) { return new _PASS_NAME_PASS(); } #else struct opt_pass *_MAKE_PASS_NAME_PASS(void) { return &_PASS_NAME_PASS.pass; } #endif /* clean up user provided defines */ #undef PASS_NAME #undef NO_GATE #undef NO_EXECUTE #undef PROPERTIES_DESTROYED #undef PROPERTIES_PROVIDED #undef PROPERTIES_REQUIRED #undef TODO_FLAGS_FINISH #undef TODO_FLAGS_START /* clean up generated defines */ #undef _EXECUTE #undef __EXECUTE #undef _GATE #undef __GATE #undef _GCC_PLUGIN_CONCAT2 #undef _GCC_PLUGIN_CONCAT3 #undef _GCC_PLUGIN_STRINGIFY #undef __GCC_PLUGIN_STRINGIFY #undef _HAS_EXECUTE #undef _HAS_GATE #undef _MAKE_PASS_NAME_PASS #undef __MAKE_PASS_NAME_PASS #undef _PASS_NAME_NAME #undef _PASS_NAME_PASS #undef __PASS_NAME_PASS #undef _PASS_NAME_PASS_DATA #undef __PASS_NAME_PASS_DATA #endif /* PASS_NAME */ ' onchange='this.form.submit();'>
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 /net/ipv6/calipso.c
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 'net/ipv6/calipso.c')