diff options
Diffstat (limited to 'arch/x86/realmode/init.c')
| -rw-r--r-- | arch/x86/realmode/init.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c index cd4be19c36dc..ed84d3917a59 100644 --- a/arch/x86/realmode/init.c +++ b/arch/x86/realmode/init.c @@ -1,6 +1,8 @@ +// SPDX-License-Identifier: GPL-2.0 #include <linux/io.h> #include <linux/slab.h> #include <linux/memblock.h> +#include <linux/mem_encrypt.h> #include <asm/set_memory.h> #include <asm/pgtable.h> @@ -59,6 +61,13 @@ static void __init setup_real_mode(void) base = (unsigned char *)real_mode_header; + /* + * If SME is active, the trampoline area will need to be in + * decrypted memory in order to bring up other processors + * successfully. + */ + set_memory_decrypted((unsigned long)base, size >> PAGE_SHIFT); + memcpy(base, real_mode_blob, size); phys_base = __pa(base); @@ -100,6 +109,10 @@ static void __init setup_real_mode(void) trampoline_cr4_features = &trampoline_header->cr4; *trampoline_cr4_features = mmu_cr4_features; + trampoline_header->flags = 0; + if (sme_active()) + trampoline_header->flags |= TH_FLAGS_SME_ACTIVE; + trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd); trampoline_pgd[0] = trampoline_pgd_entry.pgd; trampoline_pgd[511] = init_top_pgt[511].pgd; |