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init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init() 

commit 439e17576e upstream

Invoke the X86ism mem_encrypt_init() from X86 arch_cpu_finalize_init() and
remove the weak fallback from the core code.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230613224545.670360645@linutronix.de
Signed-off-by: Daniel Sneddon <daniel.sneddon@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Gleixner 2023-06-14 01:39:41 +02:00 committed by Greg Kroah-Hartman
parent 7aa2cec22e
commit 95356fff6f
3 changed files with 13 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/include/asm/mem_encrypt.h
View File

@ -77,6 +77,8 @@ early_set_memory_decrypted(unsigned long vaddr, unsigned long size) { return 0;
static inline int __init
early_set_memory_encrypted(unsigned long vaddr, unsigned long size) { return 0; }
static inline void mem_encrypt_init(void) { }
#define __bss_decrypted
#endif /* CONFIG_AMD_MEM_ENCRYPT */

11
arch/x86/kernel/cpu/common.c
View File

@ -17,6 +17,7 @@
#include <linux/init.h>
#include <linux/kprobes.h>
#include <linux/kgdb.h>
#include <linux/mem_encrypt.h>
#include <linux/smp.h>
#include <linux/cpu.h>
#include <linux/io.h>
@ -2209,4 +2210,14 @@ void __init arch_cpu_finalize_init(void)
} else {
fpu__init_check_bugs();
}
/*
* This needs to be called before any devices perform DMA
* operations that might use the SWIOTLB bounce buffers. It will
* mark the bounce buffers as decrypted so that their usage will
* not cause "plain-text" data to be decrypted when accessed. It
* must be called after late_time_init() so that Hyper-V x86/x64
* hypercalls work when the SWIOTLB bounce buffers are decrypted.
*/
mem_encrypt_init();
}

11
init/main.c
View File

@ -93,7 +93,6 @@
#include <linux/cache.h>
#include <linux/rodata_test.h>
#include <linux/jump_label.h>
#include <linux/mem_encrypt.h>
#include <asm/io.h>
#include <asm/setup.h>
@ -503,8 +502,6 @@ void __init __weak thread_stack_cache_init(void)
}
#endif
void __init __weak mem_encrypt_init(void) { }
void __init __weak poking_init(void) { }
void __init __weak pgtable_cache_init(void) { }
@ -720,14 +717,6 @@ asmlinkage __visible void __init start_kernel(void)
*/
locking_selftest();
/*
* This needs to be called before any devices perform DMA
* operations that might use the SWIOTLB bounce buffers. It will
* mark the bounce buffers as decrypted so that their usage will
* not cause "plain-text" data to be decrypted when accessed.
*/
mem_encrypt_init();
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start && !initrd_below_start_ok &&
page_to_pfn(virt_to_page((void *)initrd_start)) < min_low_pfn) {