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Wed, 21 Apr 2021 13:50:37 +0000 Cc: brijesh.singh@amd.com, pbonzini@redhat.com, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, joro@8bytes.org, thomas.lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, srutherford@google.com, seanjc@google.com, venu.busireddy@oracle.com Subject: Re: [PATCH v13 09/12] mm: x86: Invoke hypercall when page encryption status is changed To: Ashish Kalra , Borislav Petkov References: <20210421100508.GA11234@zn.tnic> <20210421121213.GA14004@ashkalra_ubuntu_server> From: Brijesh Singh Message-ID: Date: Wed, 21 Apr 2021 08:50:34 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 In-Reply-To: <20210421121213.GA14004@ashkalra_ubuntu_server> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Originating-IP: [165.204.77.11] X-ClientProxiedBy: SN4PR0201CA0003.namprd02.prod.outlook.com (2603:10b6:803:2b::13) To SN6PR12MB2718.namprd12.prod.outlook.com (2603:10b6:805:6f::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from Brijeshs-MacBook-Pro.local (165.204.77.11) by SN4PR0201CA0003.namprd02.prod.outlook.com (2603:10b6:803:2b::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4065.20 via Frontend Transport; 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>>> + pmask = page_level_mask(level); >>> + >>> + kvm_sev_hypercall3(KVM_HC_PAGE_ENC_STATUS, >>> + pfn << PAGE_SHIFT, psize >> PAGE_SHIFT, enc); >>> + >>> + vaddr_next = (vaddr & pmask) + psize; >>> + } >> As with other patches from Brijesh, that should be a while loop. :) >> > I see that early_set_memory_enc_dec() is also using a for loop, so which > patches are you referring to ? > I guess Boris is referring to my SNP patches. Please go ahead and use the while loop as recommended by Boris. -Brijesh