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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-07-17 23:10:13 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-18 11:38:01 +0200 |
| commit | a19d66c56af1c52b8b463bf94d21116ae8c1aa5a (patch) | |
| tree | bc629a18edbf08a214760831ba523ed913081e83 /drivers/firmware/efi | |
| parent | x86/boot/e820: Add support to determine the E820 type of an address (diff) | |
| download | linux-a19d66c56af1c52b8b463bf94d21116ae8c1aa5a.tar.xz linux-a19d66c56af1c52b8b463bf94d21116ae8c1aa5a.zip | |
efi: Add an EFI table address match function
Add a function that will determine if a supplied physical address matches
the address of an EFI table.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Larry Woodman <lwoodman@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Toshimitsu Kani <toshi.kani@hpe.com>
Cc: kasan-dev@googlegroups.com
Cc: kvm@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-efi@vger.kernel.org
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/e1e06441d80f44776df391e0e4cb485b345b7518.1500319216.git.thomas.lendacky@amd.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware/efi')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 045d6d311bde..69d4d130e055 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -55,6 +55,25 @@ struct efi __read_mostly efi = { }; EXPORT_SYMBOL(efi); +static unsigned long *efi_tables[] = { + &efi.mps, + &efi.acpi, + &efi.acpi20, + &efi.smbios, + &efi.smbios3, + &efi.sal_systab, + &efi.boot_info, + &efi.hcdp, + &efi.uga, + &efi.uv_systab, + &efi.fw_vendor, + &efi.runtime, + &efi.config_table, + &efi.esrt, + &efi.properties_table, + &efi.mem_attr_table, +}; + static bool disable_runtime; static int __init setup_noefi(char *arg) { @@ -855,6 +874,20 @@ int efi_status_to_err(efi_status_t status) return err; } +bool efi_is_table_address(unsigned long phys_addr) +{ + unsigned int i; + + if (phys_addr == EFI_INVALID_TABLE_ADDR) + return false; + + for (i = 0; i < ARRAY_SIZE(efi_tables); i++) + if (*(efi_tables[i]) == phys_addr) + return true; + + return false; +} + #ifdef CONFIG_KEXEC static int update_efi_random_seed(struct notifier_block *nb, unsigned long code, void *unused) |