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bh=eA3U8GDAlLCUNajUiT+ES1YkLuAsDmmQOi6ciH1zXUo=; b=YTJaD9hRlVqs+oLXxevkkT7j5DQsK7quJwCFsJGwSIxlpyS64v+9XW1ovjEnIha45U XeuSv2Q7ML/ZBdeeYSfJKbYe05wfpxe1fMOj3ppEhGichKOpF6Tb/yBIsEvUji7rKKFo 9oxWH/Q81asp64uUbwwxSDzMZncLvM43l0MhHPadpmASRBReS1L2NGFJ5TY2FJsH9HCW MayvTpjhCbZA7fm15GuMzzbNp92accKB8daZH85nyWmax9rTyqEYGqsCxJlZR6nYRN2f RWPJzWnSEMOsMEv4rPVmr4fEAFRY2B+t+wO865Xd0OA1NRo9hKyKxhR7P7YhXPFmL5nq zdBA== X-Gm-Message-State: AC+VfDxagd0wPhITMEXr3G/tZLngDR7uear/JTz5BLgIhlWOCCUYDZfH mns5ZIAnR1QdeNWpFcyo0xc= X-Received: by 2002:a17:902:db0b:b0:1aa:e5cd:6478 with SMTP id m11-20020a170902db0b00b001aae5cd6478mr5770890plx.58.1682931456993; Mon, 01 May 2023 01:57:36 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:b:e11b:15ea:ad44:bde7]) by smtp.gmail.com with ESMTPSA id t13-20020a1709028c8d00b001a4fe00a8d4sm17407070plo.90.2023.05.01.01.57.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 May 2023 01:57:36 -0700 (PDT) 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: pangupta@amd.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-arch@vger.kernel.org Subject: [RFC PATCH V5 05/15] clocksource/drivers/hyper-v: decrypt hyperv tsc page in sev-snp enlightened guest Date: Mon, 1 May 2023 04:57:15 -0400 Message-Id: <20230501085726.544209-6-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230501085726.544209-1-ltykernel@gmail.com> References: <20230501085726.544209-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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,T_SCC_BODY_TEXT_LINE 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 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 --- Change since RFC V2: * Change the Subject line prefix --- 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 bcd9042a0c9f..66e29a19770b 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -376,7 +376,7 @@ 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); static struct ms_hyperv_tsc_page *tsc_page = &tsc_pg.page; static unsigned long tsc_pfn; -- 2.25.1