From: Tom Lendacky <thomas.lendacky@xxxxxxx>
When Secure Encrypted Virtualization (SEV) is active, BOOT data (such as
EFI related data) is encrypted and needs to be access as such. Update the
architecture override in early_memremap to keep the encryption attribute
when mapping this data.
Signed-off-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
---
arch/x86/mm/ioremap.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index e3bdc5a..2ea6deb 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -429,10 +429,11 @@ pgprot_t __init early_memremap_pgprot_adjust(resource_size_t phys_addr,
pgprot_t prot)
{
/*
- * If memory encryption is enabled and BOOT_DATA is being mapped
- * then remove the encryption bit.
+ * If memory encryption is enabled, we are not running with
+ * SEV active and BOOT_DATA is being mapped then remove the
+ * encryption bit
*/
- if (_PAGE_ENC && (owner == BOOT_DATA))
+ if (_PAGE_ENC && !sev_active && (owner == BOOT_DATA))
prot = __pgprot(pgprot_val(prot) & ~_PAGE_ENC);
return prot;
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