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efi_loader: Allow SMBIOS tables in highmem

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We try hard to make sure that SMBIOS tables live in the lower 32bit.
However, when we can not find any space at all there, we should not
error out but instead just fall back to map them in the full address
space instead.

This can for example happen on systems that do not have any RAM mapped
in the lower 32bits of address space. In that case having any SMBIOS
tables at all is better than having none.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2018-06-18 17:23:00 +02:00
parent 354264b31d
commit 62f3757870
1 changed files with 9 additions and 2 deletions
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11
lib/efi_loader/efi_smbios.c
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@ -26,8 +26,15 @@ efi_status_t efi_smbios_register(void)
/* Reserve 4kiB page for SMBIOS */
ret = efi_allocate_pages(EFI_ALLOCATE_MAX_ADDRESS,
EFI_RUNTIME_SERVICES_DATA, 1, &dmi);
if (ret != EFI_SUCCESS)
return ret;
if (ret != EFI_SUCCESS) {
/* Could not find space in lowmem, use highmem instead */
ret = efi_allocate_pages(EFI_ALLOCATE_ANY_PAGES,
EFI_RUNTIME_SERVICES_DATA, 1, &dmi);
if (ret != EFI_SUCCESS)
return ret;
}
/*
* Generate SMBIOS tables - we know that efi_allocate_pages() returns