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07 Jul 2021 09:14:30 -0700 Subject: Re: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM To: Tianyu Lan , kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, rppt@kernel.org, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, ardb@kernel.org, robh@kernel.org, nramas@linux.microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, david@redhat.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, keescook@chromium.org, rientjes@google.com, hannes@cmpxchg.org, michael.h.kelley@microsoft.com References: <20210707154629.3977369-1-ltykernel@gmail.com> <20210707154629.3977369-14-ltykernel@gmail.com> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210707154629.3977369-14-ltykernel@gmail.com> Content-Language: en-US Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, brijesh.singh@amd.com, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, anparri@microsoft.com, vkuznets@redhat.com 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 7/7/21 8:46 AM, Tianyu Lan wrote: > @@ -598,7 +599,7 @@ void arch_kexec_unprotect_crashkres(void) > */ > int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp) > { > - if (sev_active()) > + if (sev_active() || hv_is_isolation_supported()) > return 0; > > /* > @@ -611,7 +612,7 @@ int arch_kexec_post_alloc_pages(void *vaddr, unsigned int pages, gfp_t gfp) > > void arch_kexec_pre_free_pages(void *vaddr, unsigned int pages) > { > - if (sev_active()) > + if (sev_active() || hv_is_isolation_supported()) > return; You might want to take a look through the "protected guest" patches. I think this series is touching a few of the same locations that TDX and recent SEV work touch. https://lore.kernel.org/lkml/20210618225755.662725-5-sathyanarayanan.kuppuswamy@linux.intel.com/ _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu