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Diffstat (limited to 'arch/x86/realmode/init.c')
-rw-r--r--arch/x86/realmode/init.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c
index cd4be19c36dc..1f71980fc5e0 100644
--- a/arch/x86/realmode/init.c
+++ b/arch/x86/realmode/init.c
@@ -1,6 +1,7 @@
#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 +60,13 @@ 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 +108,10 @@ 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;