From: Tom Lendacky <thomas.lendacky@xxxxxxx>
When running under SEV, some memory areas that were originally not
encrypted under SME are already encrypted. In these situations do not
attempt to encrypt them.
Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
arch/x86/kernel/head64.c | 4 ++--
arch/x86/kernel/setup.c | 7 ++++---
2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 358d7bc..4a15def 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -114,7 +114,7 @@ static void __init create_unencrypted_mapping(void *address, unsigned long size)
unsigned long physaddr = (unsigned long)address - __PAGE_OFFSET;
pmdval_t pmd_flags, pmd;
- if (!sme_me_mask)
+ if (!sme_me_mask || sev_active)
return;
/* Clear the encryption mask from the early_pmd_flags */
@@ -165,7 +165,7 @@ static void __init __clear_mapping(unsigned long address)
static void __init clear_mapping(void *address, unsigned long size)
{
- if (!sme_me_mask)
+ if (!sme_me_mask || sev_active)
return;
do {
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index cec8a63..9c10383 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -380,10 +380,11 @@ static void __init reserve_initrd(void)
/*
* This memory is marked encrypted by the kernel but the ramdisk
- * was loaded in the clear by the bootloader, so make sure that
- * the ramdisk image is encrypted.
+ * was loaded in the clear by the bootloader (unless SEV is active),
+ * so make sure that the ramdisk image is encrypted.
*/
- sme_early_mem_enc(ramdisk_image, ramdisk_end - ramdisk_image);
+ if (!sev_active)
+ sme_early_mem_enc(ramdisk_image, ramdisk_end - ramdisk_image);
initrd_start = 0;
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>