grub2/arm64-Use-proper-memory-type-for-kernel-allocation.patch

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From 4f9d3f4f8d7866c69e52ba7d81562daea38b22e6 Mon Sep 17 00:00:00 2001
From: Maximilian Luz <luzmaximilian@gmail.com>
Date: Tue, 28 Jun 2022 23:06:46 +0200
Subject: [PATCH] arm64: Use proper memory type for kernel allocation
References: bsc#1215151
Patch-Mainline: no, it's a downstream fix based on Fedora/openSUSE grub2
Currently, the kernel pages are allocated with type EFI_LOADER_DATA.
While the vast majority of systems will happily execute code from those
pages (i.e. don't care about memory protection), the Microsoft Surface
Pro X stalls, as this memory is not designated as "executable".
Therefore, allocate the kernel pages as EFI_LOADER_CODE to request
memory that is actually executable.
Link: https://github.com/rhboot/grub2/commit/4f9d3f4f8d7866c69e52ba7d81562daea38b22e6
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
Signed-off-by: Chester Lin <clin@suse.com>
---
grub-core/loader/arm64/linux.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/grub-core/loader/arm64/efi/linux.c b/grub-core/loader/arm64/efi/linux.c
index 419f2201d..a3a193c25 100644
--- a/grub-core/loader/arm64/efi/linux.c
+++ b/grub-core/loader/arm64/efi/linux.c
@@ -26,7 +26,9 @@
#include <grub/mm.h>
#include <grub/types.h>
#include <grub/cpu/linux.h>
+#include <grub/efi/api.h>
#include <grub/efi/efi.h>
+#include <grub/cpu/efi/memory.h>
#include <grub/efi/fdtload.h>
#include <grub/efi/memory.h>
#include <grub/efi/pe32.h>
@@ -403,7 +405,10 @@ grub_cmd_linux (grub_command_t cmd __attribute__ ((unused)),
grub_loader_unset();
kernel_alloc_pages = GRUB_EFI_BYTES_TO_PAGES (kernel_size + align - 1);
- kernel_alloc_addr = grub_efi_allocate_any_pages (kernel_alloc_pages);
+ kernel_alloc_addr = grub_efi_allocate_pages_real (GRUB_EFI_MAX_USABLE_ADDRESS,
+ kernel_alloc_pages,
+ GRUB_EFI_ALLOCATE_MAX_ADDRESS,
+ GRUB_EFI_LOADER_CODE);
grub_dprintf ("linux", "kernel numpages: %d\n", kernel_alloc_pages);
if (!kernel_alloc_addr)
{
--
2.40.0