From: Tom Lendacky <[email protected]> DMA must be performed to memory that is not mapped encrypted when running with SEV active. So if SEV is active, do not return the encryption mask to the IOMMU.
Signed-off-by: Tom Lendacky <[email protected]> --- arch/x86/mm/mem_encrypt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index ce6e3ea..d6e9f96 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -237,7 +237,7 @@ void __init mem_encrypt_init(void) unsigned long amd_iommu_get_me_mask(void) { - return sme_me_mask; + return sev_active ? 0 : sme_me_mask; } unsigned long swiotlb_get_me_mask(void) _______________________________________________ devel mailing list [email protected] http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
