From nobody Sun Sep 7 13:42:49 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 49642C7115B for ; Fri, 18 Aug 2023 10:30:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376387AbjHRKaX (ORCPT ); Fri, 18 Aug 2023 06:30:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47726 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1359870AbjHRK3d (ORCPT ); Fri, 18 Aug 2023 06:29:33 -0400 Received: from mail-pl1-x62e.google.com (mail-pl1-x62e.google.com [IPv6:2607:f8b0:4864:20::62e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51BFA13E; Fri, 18 Aug 2023 03:29:32 -0700 (PDT) Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-1bf078d5f33so6045475ad.3; Fri, 18 Aug 2023 03:29:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692354572; x=1692959372; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=jL7XByUAkxNxzGhhDsJfMYj8T25ntV2u1YZ6jozY7u0=; b=l6zq5Uwb8hpOqAjwNnFLwNt/w3QOUcDIxu+hWJsWs9/+ImbGg5c9oH1F9hnaLLkno1 3fmeB2MLrp14R8eCTT1Y8iO4NsH0/UDezrvMj/q5rSyGTQIh+aKGqgvztrmMQpqFdJtM M6Bn6EDdGDE1sa/RMumu6DNziGW8rjGoZCZyHGJHBod8jX7QGK9YtXsSCZ8OC/Hd3Vle 5KcQG6NIkPC2sCGoeNUqdNzooL4VFhaMfN93CZaSwrY1hwsrjzhgFnnxiTwe74BR3p46 +mrDet9RrNeMP4G8CSeTOZP8ya6tT/27050TXjXZbNojLgpEWtmHPtXfIZutNNQCNolP +8gA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692354572; x=1692959372; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=jL7XByUAkxNxzGhhDsJfMYj8T25ntV2u1YZ6jozY7u0=; b=NrJfgEPQdEgxwetqzIxZ6OvnbaqB83Jfj4AE5RHgZHzbWmvaZqHY1oJ1fWYaMcZyDs 84sxCIDZ6gIz3S5loGitatl5gV8FzMRJhB1HHWcQGw1qwcYNezBQgq3Fz7Bi3acIMxVk d+n5qGVnnPw9/JtVQBlgsxF5xV1pYYfTXqh7qiD5cDpHsOeh3E1B2m/iTcfFnLIEBJUl YJnDCcmNibjNSD/W46YyLJUSEIcPwbe9t56wnxhslFHqvO9DhRxe6m0VOqbTlinPUJ/e yABytc+zRB3Ae7Bug2yTojisHOfIRGXpE0G5jMSXeR56dVWlV3vfdKalDJNEsQiaNHyw tm3Q== X-Gm-Message-State: AOJu0YyOQi5b5sddpJ4O+GrB7dNcvyoVeb3Rq5h9xwm/u95XU+EE6fPv pAk4NEW2EBUPIFvykNAy17k= X-Google-Smtp-Source: AGHT+IFsJ1auTisyGk/0oOyzXEodqEiFJJTgACFHAReX+myJkECiLn2QEQCSVnCX5JnE1SR08bHtmw== X-Received: by 2002:a17:902:ce83:b0:1bb:ffcc:8eba with SMTP id f3-20020a170902ce8300b001bbffcc8ebamr2574028plg.58.1692354571775; Fri, 18 Aug 2023 03:29:31 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:7:4545:4938:97f0:2e1f]) by smtp.gmail.com with ESMTPSA id f1-20020a17090274c100b001b9be79729csm1386766plt.165.2023.08.18.03.29.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Aug 2023 03:29:31 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, daniel.lezcano@linaro.org, arnd@arndb.de, michael.h.kelley@microsoft.com Cc: Tianyu Lan , linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, vkuznets@redhat.com, Michael Kelley Subject: [PATCH v7 6/8] clocksource: hyper-v: Mark hyperv tsc page unencrypted in sev-snp enlightened guest Date: Fri, 18 Aug 2023 06:29:16 -0400 Message-Id: <20230818102919.1318039-7-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230818102919.1318039-1-ltykernel@gmail.com> References: <20230818102919.1318039-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tianyu Lan Hyper-V tsc page is shared with hypervisor and mark the page unencrypted in sev-snp enlightened guest when it's used. Reviewed-by: Dexuan Cui Reviewed-by: Michael Kelley 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/hyper= v_timer.c index e56307a81f4d..8ff7cd4e20bb 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -390,7 +390,7 @@ static __always_inline u64 read_hv_clock_msr(void) static union { struct ms_hyperv_tsc_page page; u8 reserved[PAGE_SIZE]; -} tsc_pg __aligned(PAGE_SIZE); +} tsc_pg __bss_decrypted __aligned(PAGE_SIZE); =20 static struct ms_hyperv_tsc_page *tsc_page =3D &tsc_pg.page; static unsigned long tsc_pfn; --=20 2.25.1