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([2404:f801:9000:1a:efea::4b1]) by smtp.gmail.com with ESMTPSA id s6sm10053656pjp.45.2021.07.08.06.54.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 08 Jul 2021 06:54:32 -0700 (PDT) Subject: Re: [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM To: Dave Hansen , 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 Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, brijesh.singh@amd.com, anparri@microsoft.com References: <20210707154629.3977369-1-ltykernel@gmail.com> <20210707154629.3977369-14-ltykernel@gmail.com> <3b5a1bd0-369a-2723-97c1-4ab4edb14eda@intel.com> From: Tianyu Lan Message-ID: Date: Thu, 8 Jul 2021 21:54:15 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <3b5a1bd0-369a-2723-97c1-4ab4edb14eda@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org Hi Dave: Thanks for your review. On 7/8/2021 12:14 AM, Dave Hansen wrote: > 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/ Thanks for reminder. You are right. There will be a generic API to check "proteced guest" type.