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Merge tag 'efi-fixes-for-v6.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

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Pull EFI fix from Ard Biesheuvel:
 "A fix from Darren to widen the SMBIOS match for detecting Ampere Altra
  machines with problematic firmware. In the mean time, we are working
  on a more precise check, but this is still work in progress"

* tag 'efi-fixes-for-v6.2-4' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  arm64: efi: Force the use of SetVirtualAddressMap() on eMAG and Altra Max machines
This commit is contained in:
Linus Torvalds
2023-02-12 11:13:29 -08:00
parent 49a0bdb0a3 190233164c
commit dd78af9fde
1 changed files with 6 additions and 3 deletions
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drivers/firmware/efi/libstub/arm64.c
+6 -3
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@@ -19,10 +19,13 @@ static bool system_needs_vamap(void)
const u8 *type1_family = efi_get_smbios_string(1, family);
/*
* Ampere Altra machines crash in SetTime() if SetVirtualAddressMap()
* has not been called prior.
* Ampere eMAG, Altra, and Altra Max machines crash in SetTime() if
* SetVirtualAddressMap() has not been called prior.
*/
if (!type1_family || strcmp(type1_family, "Altra"))
if (!type1_family || (
strcmp(type1_family, "eMAG") &&
strcmp(type1_family, "Altra") &&
strcmp(type1_family, "Altra Max")))
return false;
efi_warn("Working around broken SetVirtualAddressMap()\n");