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efi: Process the MEMATTR table only if EFI_MEMMAP is enabled

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Otherwise e.g. Xen dom0 on x86_64 EFI platforms crashes.

In theory we can check EFI_PARAVIRT too, however,
EFI_MEMMAP looks more targeted and covers more cases.

Signed-off-by: Daniel Kiper <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Daniel Kiper 2017-06-22 12:51:36 +02:00 • committed by Ingo Molnar
commit 457ea3f7e9
1 changed files with 2 additions and 1 deletions
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3
drivers/firmware/efi/efi.c
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@ -528,7 +528,8 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz,
}
}
efi_memattr_init();
if (efi_enabled(EFI_MEMMAP))
efi_memattr_init();
/* Parse the EFI Properties table if it exists */
if (efi.properties_table != EFI_INVALID_TABLE_ADDR) {