From nobody Wed Dec 17 23:23:16 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 E92D1C25B5C for ; Wed, 16 Aug 2023 16:00:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344511AbjHPP7j (ORCPT ); Wed, 16 Aug 2023 11:59:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57220 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344518AbjHPP7S (ORCPT ); Wed, 16 Aug 2023 11:59:18 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C0E72D4B; Wed, 16 Aug 2023 08:59:05 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id d9443c01a7336-1bf078d5f33so2084575ad.3; Wed, 16 Aug 2023 08:59:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692201544; x=1692806344; 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=Oyq9KI3NurUC1G8S0DuY90VVqt2QiudPjei5bx+xe8I=; b=fn+7szNFLJ7B2fCHmXj5A4B26YXulifd8l00n5xECuLXlR17RuT0pUyQCeu+hgdOyZ mSr8sqlY8jlKb8nfNMQsuodtAhmfxO6kcc1SQhj07kOEO/rXiJGyCb6fBuIflmXAAHlp 1fJo36kOa1d4EliCgoanxELBXZiPJWQQCQ3jrVRAM0gGdusUlbENb2punRgWE9M6kead j96dhPuTzsgk7ip81LZo1j6LKAx+5vbNLBzpOy/ygQccZDnmw9dyqYWI7tjjXGUG648A JaRJvIInTc/1nohyw0NEn9lur76Aharvhk8tA3m5vPFhkskPbsioSTFmxuGW+ZmU8lAg Q7zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692201544; x=1692806344; 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=Oyq9KI3NurUC1G8S0DuY90VVqt2QiudPjei5bx+xe8I=; b=ckEhQGDO1Mx0KiOy2ZkQTaR1Wz6dQS6+0p3F0vdQYKx9YvJg4jkuLCO0yeUVt6kWIP Mp5kk5sw1AtSzIRDUEaWk8zmA+Z1rA2Jl3R1CIIS4NMkd2TcCMZwSm9kPZOBgg1fsYO+ Iwm/q49jqg5sqYzANARtOd6MOa3MwPCcRpbp1iZJub55iItGGisFTy/OEt0jdKeFPJv9 j/dIgZFzlyATOQ2CrhuJRQOnrkzQ6s58PKFZ99M1RqA6zr+H6NPUSVAAr2rvBQwsoQ5h +G1uTkh7XBsNzljLh2SzCcUPoPpuZFgi3TaP4lDvIEvbwPlEvFW/Yq6iBnajaR4cpP6U r62A== X-Gm-Message-State: AOJu0YwNesamHm/eSgiOJZ60kFZEhrd/Gx0DX/gv8dS7Pg6BDLrcuxMt 5MMTjIqR5CeIKiWQaMANwso= X-Google-Smtp-Source: AGHT+IGPm8/54I+WSetL6xPW3f3htkirKcOG2+oU3Oqcm4g01axknIbIaWIbfIb1hwrIskZZicQ0qw== X-Received: by 2002:a17:902:bd89:b0:1bb:77a2:edda with SMTP id q9-20020a170902bd8900b001bb77a2eddamr2150365pls.36.1692201544645; Wed, 16 Aug 2023 08:59:04 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:0:e588:8d80:9ae5:5adc]) by smtp.gmail.com with ESMTPSA id h17-20020a170902f7d100b001bc930d4517sm13366973plw.42.2023.08.16.08.59.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Aug 2023 08:59:04 -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 v6 8/8] x86/hyperv: Add hyperv-specific handling for VMMCALL under SEV-ES Date: Wed, 16 Aug 2023 11:58:49 -0400 Message-Id: <20230816155850.1216996-9-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230816155850.1216996-1-ltykernel@gmail.com> References: <20230816155850.1216996-1-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 Add Hyperv-specific handling for faults caused by VMMCALL instructions. Reviewed-by: Michael Kelley Signed-off-by: Tianyu Lan Reviewed-by: Dexuan Cui --- arch/x86/kernel/cpu/mshyperv.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index c2ccb49b49c2..b7d73f3107c6 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -32,6 +32,7 @@ #include #include #include +#include =20 /* Is Linux running as the root partition? */ bool hv_root_partition; @@ -574,6 +575,22 @@ static bool __init ms_hyperv_msi_ext_dest_id(void) return eax & HYPERV_VS_PROPERTIES_EAX_EXTENDED_IOAPIC_RTE; } =20 +#ifdef CONFIG_AMD_MEM_ENCRYPT +static void hv_sev_es_hcall_prepare(struct ghcb *ghcb, struct pt_regs *reg= s) +{ + /* RAX and CPL are already in the GHCB */ + ghcb_set_rcx(ghcb, regs->cx); + ghcb_set_rdx(ghcb, regs->dx); + ghcb_set_r8(ghcb, regs->r8); +} + +static bool hv_sev_es_hcall_finish(struct ghcb *ghcb, struct pt_regs *regs) +{ + /* No checking of the return state needed */ + return true; +} +#endif + const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv =3D { .name =3D "Microsoft Hyper-V", .detect =3D ms_hyperv_platform, @@ -581,4 +598,8 @@ const __initconst struct hypervisor_x86 x86_hyper_ms_hy= perv =3D { .init.x2apic_available =3D ms_hyperv_x2apic_available, .init.msi_ext_dest_id =3D ms_hyperv_msi_ext_dest_id, .init.init_platform =3D ms_hyperv_init_platform, +#ifdef CONFIG_AMD_MEM_ENCRYPT + .runtime.sev_es_hcall_prepare =3D hv_sev_es_hcall_prepare, + .runtime.sev_es_hcall_finish =3D hv_sev_es_hcall_finish, +#endif }; --=20 2.25.1