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x86/efi: Move runtime service initialization to arch/x86

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The EFI call in start_kernel() is guarded by #ifdef CONFIG_X86. Move
the thing to the arch_cpu_finalize_init() path on x86 and get rid of
the #ifdef in start_kernel().

No functional change intended.

Suggested-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/all/20250620135325.3300848-5-kirill.shutemov%40linux.intel.com
This commit is contained in:
Alexander Shishkin 2025-06-20 16:53:12 +03:00 committed by Dave Hansen
parent e04c78d86a
commit ce2c403c26
2 changed files with 7 additions and 5 deletions
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7
arch/x86/kernel/cpu/common.c
View File

@ -26,6 +26,7 @@
#include <linux/pgtable.h>
#include <linux/stackprotector.h>
#include <linux/utsname.h>
#include <linux/efi.h>
#include <asm/alternative.h>
#include <asm/cmdline.h>
@ -2529,6 +2530,12 @@ void __init arch_cpu_finalize_init(void)
fpu__init_system();
fpu__init_cpu();
/*
* This needs to follow the FPU initializtion, since EFI depends on it.
*/
if (efi_enabled(EFI_RUNTIME_SERVICES))
efi_enter_virtual_mode();
/*
* Ensure that access to the per CPU representation has the initial
* boot CPU configuration.

5
init/main.c
View File

@ -53,7 +53,6 @@
#include <linux/cpuset.h>
#include <linux/memcontrol.h>
#include <linux/cgroup.h>
#include <linux/efi.h>
#include <linux/tick.h>
#include <linux/sched/isolation.h>
#include <linux/interrupt.h>
@ -1068,10 +1067,6 @@ void start_kernel(void)
pid_idr_init();
anon_vma_init();
#ifdef CONFIG_X86
if (efi_enabled(EFI_RUNTIME_SERVICES))
efi_enter_virtual_mode();
#endif
thread_stack_cache_init();
cred_init();
fork_init();