From 33ca95024aa7e33218da5882d30b3ec690a11046 Mon Sep 17 00:00:00 2001

From: Gary Lin <glin@suse.com>

Date: Thu, 8 Apr 2021 16:23:03 +0800

Subject: [PATCH] mok: allocate MOK config table as BootServicesData

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Linux kernel is picky when reserving the memory for x86 and it only

expects BootServicesData:

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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/platform/efi/quirks.c?h=v5.11#n254

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Otherwise, the following error would show during system boot:

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Apr 07 12:31:56.743925 localhost kernel: efi: Failed to lookup EFI memory descriptor for 0x000000003dcf8000

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Although BootServicesData would be reclaimed after ExitBootService(),

linux kernel reserves MOK config table when it detects the existence of

the table, so it's fine to allocate the table as BootServicesData.

​

Signed-off-by: Gary Lin <glin@suse.com>

---

 mok.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/mok.c b/mok.c

index 5ad9072b..fc1ee04d 100644

--- a/mok.c

+++ b/mok.c

@@ -1002,7 +1002,7 @@ EFI_STATUS import_mok_state(EFI_HANDLE image_handle)

        npages = ALIGN_VALUE(config_sz, PAGE_SIZE) >> EFI_PAGE_SHIFT;

        config_table = NULL;

        efi_status = gBS->AllocatePages(AllocateAnyPages,

-                       EfiRuntimeServicesData,

+                       EfiBootServicesData,

                        npages,

                        (EFI_PHYSICAL_ADDRESS *)&config_table);

        if (EFI_ERROR(efi_status) || !config_table) {

-- 

2.29.2

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​