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bh=HkcTs/ArLjoTKDcTyzMU889nkY7DdVdas4PocmXRhm8=; b=SxqA0dtK3lV9BO+wG8XicJQRX95FJ52nO5l53RvluDCUkUOEAgesxTWDl7oAfdhm9O qStzxX6+F4fB7RF+sqQP33gmY2Wl656M2kzNg37o1olQLIBHkHGpzuRKJxWaDFqfitti 2XrE0EVxw9S04W0o8EkaFbHbO+bAoG29xBtrjZ+bUkkZoebYpb7QqcUZgyqi6WBOKnvw B9PExgCvh/v8Nqw7ABWsNhLC9nI07iQrNoFT0/yTvVYGtd5mb+dQy5WuaAWBbbDH8R+U FmfPJqJJ4tdSqELwVe3wbcGepTmJ46MT9IHf8vkQTvTsa0pQBazsmDLgBj7DSfb3qq8Z 8wXQ== X-Gm-Message-State: ACrzQf0I1gksN0049+tfC2bJueaeDJNQqeMk3Nc52z8uakyAxW0FfuEG YwpYjFnkZtvPGar5pHgFEpc= X-Received: by 2002:a17:902:b40b:b0:17f:628d:2a9 with SMTP id x11-20020a170902b40b00b0017f628d02a9mr1256339plr.70.1668027247697; Wed, 09 Nov 2022 12:54:07 -0800 (PST) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:a:c616:2003:6c97:8057]) by smtp.gmail.com with ESMTPSA id c2-20020a17090a108200b002137d3da760sm1633984pja.39.2022.11.09.12.54.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Nov 2022 12:54:07 -0800 (PST) From: Tianyu Lan To: luto@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, seanjc@google.com, pbonzini@redhat.com, jgross@suse.com, tiala@microsoft.com, kirill@shutemov.name, jiangshan.ljs@antgroup.com, peterz@infradead.org, ashish.kalra@amd.com, srutherford@google.com, akpm@linux-foundation.org, anshuman.khandual@arm.com, pawan.kumar.gupta@linux.intel.com, adrian.hunter@intel.com, daniel.sneddon@linux.intel.com, alexander.shishkin@linux.intel.com, sandipan.das@amd.com, ray.huang@amd.com, brijesh.singh@amd.com, michael.roth@amd.com, thomas.lendacky@amd.com, venu.busireddy@oracle.com, sterritt@google.com, tony.luck@intel.com, samitolvanen@google.com, fenghua.yu@intel.com Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org Subject: [RFC PATCH 08/17] clocksource: hyper-v: decrypt hyperv tsc page in sev-snp enlightened guest Date: Wed, 9 Nov 2022 15:53:43 -0500 Message-Id: <20221109205353.984745-9-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221109205353.984745-1-ltykernel@gmail.com> References: <20221109205353.984745-1-ltykernel@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749053449129896811?= X-GMAIL-MSGID: =?utf-8?q?1749053449129896811?= From: Tianyu Lan Hyper-V tsc page is shared with hypervisor and it should be decrypted in sev-snp enlightened guest when it's used. Signed-off-by: Tianyu Lan --- drivers/clocksource/hyperv_timer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyperv_timer.c index bb47610bbd1c..aa68eebed5ee 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -364,7 +364,7 @@ EXPORT_SYMBOL_GPL(hv_stimer_global_cleanup); static union { struct ms_hyperv_tsc_page page; u8 reserved[PAGE_SIZE]; -} tsc_pg __aligned(PAGE_SIZE); +} tsc_pg __bss_decrypted __aligned(PAGE_SIZE); struct ms_hyperv_tsc_page *hv_get_tsc_page(void) {