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arm64/linux: Allocate memory for kernel with EFI_LOADER_CODE type

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Resolves: #RHEL-49868
Signed-off-by: Nicolas Frayer <nfrayer@redhat.com>
This commit is contained in:
Nicolas Frayer 2024-08-13 19:48:24 +02:00
parent d5d341df5d
commit ec05bd1b7c
3 changed files with 50 additions and 1 deletions
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44
0351-arm64-Use-proper-memory-type-for-kernel-allocation.patch Normal file
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@ -0,0 +1,44 @@
From 0000000000000000000000000000000000000000 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
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.
Signed-off-by: Maximilian Luz <luzmaximilian@gmail.com>
---
grub-core/loader/arm64/linux.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/grub-core/loader/arm64/linux.c b/grub-core/loader/arm64/linux.c
index 419f2201df8b..a3a193c255e9 100644
--- a/grub-core/loader/arm64/linux.c
+++ b/grub-core/loader/arm64/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/linux.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)
{

1
grub.patches
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@ -348,3 +348,4 @@ Patch0347: 0347-grub2-mkconfig-Ensure-grub-cfg-stub-is-not-overwritt.patch
Patch0348: 0348-chainloader-remove-device-path-debug-message.patch
Patch0349: 0349-grub2-mkconfig-Simplify-os_name-detection.patch
Patch0350: 0350-grub-mkconfig-Remove-check-for-mount-point-for-grub-.patch
Patch0351: 0351-arm64-Use-proper-memory-type-for-kernel-allocation.patch

6
grub2.spec
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@ -16,7 +16,7 @@
Name: grub2
Epoch: 1
Version: 2.06
Release: 91%{?dist}
Release: 92%{?dist}
Summary: Bootloader with support for Linux, Multiboot and more
License: GPLv3+
URL: http://www.gnu.org/software/grub/
@ -547,6 +547,10 @@ mv ${EFI_HOME}/grub.cfg.stb ${EFI_HOME}/grub.cfg
%endif
%changelog
* Tue Aug 13 2024 Nicolas Frayer <nfrayer@redhat.com> - 2.06-92
- arm64/linux: Allocate memory for kernel with EFI_LOADER_CODE type
- Resolves: #RHEL-49868
* Fri Aug 2 2024 Leo Sandoval <lsandova@redhat.com> - 2.06-91
- Set /boot/grub2/grub.cfg to 0600 mode if present
- Resolves: #RHEL-45870