/* * Copyright (C) 2002-2005 Roman Zippel * Copyright (C) 2002-2005 Sam Ravnborg * * Released under the terms of the GNU GPL v2.0. */ #include #include #include #include "lkc.h" /* file already present in list? If not add it */ struct file *file_lookup(const char *name) { struct file *file; const char *file_name = sym_expand_string_value(name); for (file = file_list; file; file = file->next) { if (!strcmp(name, file->name)) { free((void *)file_name); return file; } } file = xmalloc(sizeof(*file)); memset(file, 0, sizeof(*file)); file->name = file_name; file->next = file_list; file_list = file; return file; } /* write a dependency file as used by kbuild to track dependencies */ int file_write_dep(const char *name) { struct symbol *sym, *env_sym; struct expr *e; struct file *file; FILE *out; if (!name) name = ".kconfig.d"; out = fopen("..config.tmp", "w"); if (!out) return 1; fprintf(out, "deps_config := \\\n"); for (file = file_list; file; file = file->next) { if (file->next) fprintf(out, "\t%s \\\n", file->name); else fprintf(out, "\t%s\n", file->name); } fprintf(out, "\n%s: \\\n" "\t$(deps_config)\n\n", conf_get_autoconfig_name()); expr_list_for_each_sym(sym_env_list, e, sym) { struct property *prop; const char *value; prop = sym_get_env_prop(sym); env_sym = prop_get_symbol(prop); if (!env_sym) continue; value = getenv(env_sym->name); if (!value) value = ""; fprintf(out, "ifneq \"$(%s)\" \"%s\"\n", env_sym->name, value); fprintf(out, "%s: FORCE\n", conf_get_autoconfig_name()); fprintf(out, "endif\n"); } fprintf(out, "\n$(deps_config): ;\n"); fclose(out); rename("..config.tmp", name); return 0; } /* Allocate initial growable string */ struct gstr str_new(void) { struct gstr gs; gs.s = xmalloc(sizeof(char) * 64); gs.len = 64; gs.max_width = 0; strcpy(gs.s, "\0"); return gs; } /* Free storage for growable string */ void str_free(struct gstr *gs) { if (gs->s) free(gs->s); gs->s = NULL; gs->len = 0; } /* Append to growable string */ void str_append(struct gstr *gs, const char *s) { size_t l; if (s) { l = strlen(gs->s) + strlen(s) + 1; if (l > gs->len) { gs->s = realloc(gs->s, l); gs->len = l; } strcat(gs->s, s); } } /* Append printf formatted string to growable string */ void str_printf(struct gstr *gs, const char *fmt, ...) { va_list ap; char s[10000]; /* big enough... */ va_start(ap, fmt); vsnprintf(s, sizeof(s), fmt, ap); str_append(gs, s); va_end(ap); } /* Retrieve value of growable string */ const char *str_get(struct gstr *gs) { return gs->s; } void *xmalloc(size_t size) { void *p = malloc(size); if (p) return p; fprintf(stderr, "Out of memory.\n"); exit(1); } void *xcalloc(size_t nmemb, size_t size) { void *p = calloc(nmemb, size); if (p) return p; fprintf(stderr, "Out of memory.\n"); exit(1); } sb?id=c8f325a59cfc718d13a50fbc746ed9b415c25e92'>usb/host/ohci-omap.c
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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 /drivers/usb/host/ohci-omap.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 'drivers/usb/host/ohci-omap.c')