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See http://www.infradead.org/rpr.html Cc: linux-efi@vger.kernel.org, Brijesh Singh , kvm@vger.kernel.org, Peter Zijlstra , Dave Hansen , dri-devel@lists.freedesktop.org, platform-driver-x86@vger.kernel.org, linux-s390@vger.kernel.org, Andi Kleen , x86@kernel.org, amd-gfx@lists.freedesktop.org, Ingo Molnar , linux-graphics-maintainer@vmware.com, Joerg Roedel , Tianyu Lan , Borislav Petkov , Andy Lutomirski , Thomas Gleixner , kexec@lists.infradead.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-fsdevel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Fri, Aug 13, 2021 at 11:59:22AM -0500, Tom Lendacky wrote: > While the name suggests this is intended mainly for guests, it will > also be used for host memory encryption checks in place of sme_active(). Which suggest that the name is not good to start with. Maybe protected hardware, system or platform might be a better choice? > +static inline bool prot_guest_has(unsigned int attr) > +{ > +#ifdef CONFIG_AMD_MEM_ENCRYPT > + if (sme_me_mask) > + return amd_prot_guest_has(attr); > +#endif > + > + return false; > +} Shouldn't this be entirely out of line? > +/* 0x800 - 0x8ff reserved for AMD */ > +#define PATTR_SME 0x800 > +#define PATTR_SEV 0x801 > +#define PATTR_SEV_ES 0x802 Why do we need reservations for a purely in-kernel namespace? And why are you overoading a brand new generic API with weird details of a specific implementation like this? _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu