From 45add3cc99feaaf57d4b6f01d52d532c16a1caee Mon Sep 17 00:00:00 2001 From: Heiner Kallweit Date: Fri, 30 Apr 2021 16:22:51 +0200 Subject: [PATCH] efi: Allow EFI_MEMORY_XP and EFI_MEMORY_RO both to be cleared UEFI spec 2.9, p.108, table 4-1 lists the scenario that both attributes are cleared with the description "No memory access protection is possible for Entry". So we can have valid entries where both attributes are cleared, so remove the check. Signed-off-by: Heiner Kallweit Fixes: 10f0d2f577053 ("efi: Implement generic support for the Memory Attributes table") Signed-off-by: Ard Biesheuvel --- drivers/firmware/efi/memattr.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/firmware/efi/memattr.c b/drivers/firmware/efi/memattr.c index 5737cb0..0a9aba5 100644 --- a/drivers/firmware/efi/memattr.c +++ b/drivers/firmware/efi/memattr.c @@ -67,11 +67,6 @@ static bool entry_is_valid(const efi_memory_desc_t *in, efi_memory_desc_t *out) return false; } - if (!(in->attribute & (EFI_MEMORY_RO | EFI_MEMORY_XP))) { - pr_warn("Entry attributes invalid: RO and XP bits both cleared\n"); - return false; - } - if (PAGE_SIZE > EFI_PAGE_SIZE && (!PAGE_ALIGNED(in->phys_addr) || !PAGE_ALIGNED(in->num_pages << EFI_PAGE_SHIFT))) { -- 2.7.4