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client-ip=165.204.84.17; helo=satlexmb07.amd.com; pr=C Received: from satlexmb07.amd.com (165.204.84.17) by BN3PEPF0000B06A.mail.protection.outlook.com (10.167.243.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9654.0 via Frontend Transport; Wed, 25 Feb 2026 05:41:44 +0000 Received: from aiemdee.amd.com (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Tue, 24 Feb 2026 23:41:24 -0600 From: Alexey Kardashevskiy To: CC: , , , Thomas Gleixner , "Ingo Molnar" , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , "Sean Christopherson" , Paolo Bonzini , "Andy Lutomirski" , Peter Zijlstra , "Bjorn Helgaas" , Dan Williams , "Marek Szyprowski" , Robin Murphy , Andrew Morton , Catalin Marinas , Michael Ellerman , "Mike Rapoport" , Tom Lendacky , "Ard Biesheuvel" , Neeraj Upadhyay , Ashish Kalra , Stefano Garzarella , Melody Wang , Seongman Lee , Joerg Roedel , "Nikunj A Dadhania" , Michael Roth , "Suravee Suthikulpanit" , Andi Kleen , Kuppuswamy Sathyanarayanan , Tony Luck , David Woodhouse , "Greg Kroah-Hartman" , Denis Efremov , Geliang Tang , Piotr Gregor , "Michael S. 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Return false from force_dma_unencrypted() for TDISP devices. Signed-off-by: Alexey Kardashevskiy --- arch/x86/mm/mem_encrypt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 95bae74fdab2..8daa6482b080 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -20,10 +20,11 @@ bool force_dma_unencrypted(struct device *dev) { /* - * For SEV, all DMA must be to unencrypted addresses. + * dma_direct_alloc() forces page state change if private memory is + * allocated for DMA. Skip conversion if the TDISP device is accepted. */ if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) - return true; + return !device_cc_accepted(dev); /* * For SME, all DMA must be to unencrypted addresses if the -- 2.52.0