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| author | Thomas Gleixner <tglx@linutronix.de> | 2023-08-01 16:07:11 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-08 20:04:49 +0200 |
| commit | 03e244a37a411efaa0251d1f2cc5471c7dd9cc44 (patch) | |
| tree | 025cdde81fd2cc675052674d24e9dd80292e9719 | |
| parent | 5dc85ed21b9c16050ff37178ed9a7d08fcdb1099 (diff) | |
| download | linux-stable-03e244a37a411efaa0251d1f2cc5471c7dd9cc44.tar.gz linux-stable-03e244a37a411efaa0251d1f2cc5471c7dd9cc44.tar.bz2 linux-stable-03e244a37a411efaa0251d1f2cc5471c7dd9cc44.zip | |
init, x86: Move mem_encrypt_init() into arch_cpu_finalize_init()
commit 439e17576eb47f26b78c5bbc72e344d4206d2327 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>
| -rw-r--r-- | arch/x86/include/asm/mem_encrypt.h | 7 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/common.c | 11 | ||||
| -rw-r--r-- | init/main.c | 13 |
3 files changed, 15 insertions, 16 deletions
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h index b7126701574c..98ce265f2e33 100644 --- a/arch/x86/include/asm/mem_encrypt.h +++ b/arch/x86/include/asm/mem_encrypt.h @@ -51,6 +51,8 @@ void __init mem_encrypt_free_decrypted_mem(void); void __init sev_es_init_vc_handling(void); +void __init mem_encrypt_init(void); + #define __bss_decrypted __section(".bss..decrypted") #else /* !CONFIG_AMD_MEM_ENCRYPT */ @@ -83,13 +85,12 @@ early_set_mem_enc_dec_hypercall(unsigned long vaddr, int npages, bool enc) {} static inline void mem_encrypt_free_decrypted_mem(void) { } +static inline void mem_encrypt_init(void) { } + #define __bss_decrypted #endif /* CONFIG_AMD_MEM_ENCRYPT */ -/* Architecture __weak replacement functions */ -void __init mem_encrypt_init(void); - void add_encrypt_protection_map(void); /* diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index f5d08a090862..e9f9b94375b2 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -18,6 +18,7 @@ #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> @@ -2416,4 +2417,14 @@ 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(); } diff --git a/init/main.c b/init/main.c index 643ed89b2e4c..3bec87f4c4cd 100644 --- a/init/main.c +++ b/init/main.c @@ -95,7 +95,6 @@ #include <linux/cache.h> #include <linux/rodata_test.h> #include <linux/jump_label.h> -#include <linux/mem_encrypt.h> #include <linux/kcsan.h> #include <linux/init_syscalls.h> #include <linux/stackdepot.h> @@ -786,8 +785,6 @@ 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) { } @@ -1044,16 +1041,6 @@ void start_kernel(void) arch_cpu_finalize_init(); - /* - * 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(); - pid_idr_init(); anon_vma_init(); #ifdef CONFIG_X86 |