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| author | Borislav Petkov <bp@suse.de> | 2021-10-04 17:37:22 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-10-04 17:37:22 +0200 |
| commit | c7419a6e1aa3219ff62045ab6e56e37d5ad2d292 (patch) | |
| tree | a5145db864629e50196ba0f13e0b1c80f7d4331a /arch/x86/kernel/head64.c | |
| parent | x86: Increase exception stack sizes (diff) | |
| parent | treewide: Replace the use of mem_encrypt_active() with cc_platform_has() (diff) | |
| download | linux-c7419a6e1aa3219ff62045ab6e56e37d5ad2d292.tar.xz linux-c7419a6e1aa3219ff62045ab6e56e37d5ad2d292.zip | |
Merge branch x86/cc into x86/core
Pick up dependent cc_platform_has() changes.
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'arch/x86/kernel/head64.c')
| -rw-r--r-- | arch/x86/kernel/head64.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index de01903c3735..fc5371a7e9d1 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -19,7 +19,7 @@ #include <linux/start_kernel.h> #include <linux/io.h> #include <linux/memblock.h> -#include <linux/mem_encrypt.h> +#include <linux/cc_platform.h> #include <linux/pgtable.h> #include <asm/processor.h> @@ -284,8 +284,13 @@ unsigned long __head __startup_64(unsigned long physaddr, * The bss section will be memset to zero later in the initialization so * there is no need to zero it after changing the memory encryption * attribute. + * + * This is early code, use an open coded check for SME instead of + * using cc_platform_has(). This eliminates worries about removing + * instrumentation or checking boot_cpu_data in the cc_platform_has() + * function. */ - if (mem_encrypt_active()) { + if (sme_get_me_mask()) { vaddr = (unsigned long)__start_bss_decrypted; vaddr_end = (unsigned long)__end_bss_decrypted; for (; vaddr < vaddr_end; vaddr += PMD_SIZE) { |