From nobody Sun Sep 14 14:10:10 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 540B1C77B75 for ; Mon, 15 May 2023 17:01:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243558AbjEORBe (ORCPT ); Mon, 15 May 2023 13:01:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243456AbjEOQ7z (ORCPT ); Mon, 15 May 2023 12:59:55 -0400 Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 130E683CE; Mon, 15 May 2023 09:59:47 -0700 (PDT) Received: by mail-pl1-x62b.google.com with SMTP id d9443c01a7336-1ab032d9266so120602405ad.0; Mon, 15 May 2023 09:59:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1684169986; x=1686761986; 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=cmY2ej1hy4vAs/f4OlrbKuvNcHo8SUtv7o8IcsrQg3U=; b=llobHjZ8CaIv83lisuWYuHqNS76/tNXm2lgpfFKCeP6ap94oN1gkuO+vAaGen3l7Zf /5N9F6v7G42Et49vEQ4VYj0iNh3BUmWx45NHrOwY6DFCAIrau+ZWoft2KLtHIvm+J6M9 GjXehqZjYbmt+TDyDM0qFuICTBIMGYCZJjMeAojhXpVR0uqz0+acO0YybhbjaQSHPA55 7cMs9Y+n6PFLSzYGnlLM4tkK5Vg0NZFew5KLtO3NBkZ3+zlJQIsyO86fR30/uLY0m003 iDD9GC0tTbV8Lpcm8XbGD1Cds3XMYs+m+DcjhoIwNKfuS9Tb7GXTMDNPUoFoWObxFFES E3RA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684169986; x=1686761986; 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=cmY2ej1hy4vAs/f4OlrbKuvNcHo8SUtv7o8IcsrQg3U=; b=UU5Q0/y4zuhNb40+zmiO122y1xSm3PTXBHhnMmuanAiuFU+fM1awCsG5UFzduwuyuc pmrsxW29Ke1Dh7f9FYzXRE+WJnNOHklGwFEj8B5gVO8ge5nGdMsgrmnlH6x19SmDxs57 Y7tZKDYR8E4GD/Irb+SKRx0M/nYbCuKPW6/w27EkMaM1wLwgCn3QnuRlfIVTRD7lIPuq 6fU46eph2U+oISgx+oTGa1uA+8gHNutTp9iXGQiFfqaCD4BhmCQiqX93h4aemCSHq8VG A8O2wZssfxR11/14fBBm9SIOHZplswKVA0kWPUWusTUcJKtgfOHIp5AY3Vr2LxuXEqjI L4Lw== X-Gm-Message-State: AC+VfDybsvqnf7wuu+SprOO44lBFmaDNjzPe2VBrLL2ogorXsSyDVUEq kz30QyUI46bC3MGvKvfJTs0= X-Google-Smtp-Source: ACHHUZ5ax8PMzMJyb4JE01QgIu1eN/8WniJ6gslKo//Mqlo5UEC9KUHdakOZkvioQ2T6mK0YMaHGpQ== X-Received: by 2002:a17:90a:e50d:b0:247:6a31:d59d with SMTP id t13-20020a17090ae50d00b002476a31d59dmr33951385pjy.1.1684169986489; Mon, 15 May 2023 09:59:46 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:f:85bb:dfc8:391f:ff73]) by smtp.gmail.com with ESMTPSA id x13-20020a17090aa38d00b0024df6bbf5d8sm2151pjp.30.2023.05.15.09.59.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 May 2023 09:59:46 -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 V6 14/14] x86/hyperv: Add hyperv-specific handling for VMMCALL under SEV-ES Date: Mon, 15 May 2023 12:59:16 -0400 Message-Id: <20230515165917.1306922-15-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230515165917.1306922-1-ltykernel@gmail.com> References: <20230515165917.1306922-1-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. Signed-off-by: Tianyu Lan --- arch/x86/kernel/cpu/mshyperv.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 0c5f9f7bd7ba..3469b369e627 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; @@ -577,6 +578,20 @@ static bool __init ms_hyperv_msi_ext_dest_id(void) return eax & HYPERV_VS_PROPERTIES_EAX_EXTENDED_IOAPIC_RTE; } =20 +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; +} + const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv =3D { .name =3D "Microsoft Hyper-V", .detect =3D ms_hyperv_platform, @@ -584,4 +599,6 @@ 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, + .runtime.sev_es_hcall_prepare =3D hv_sev_es_hcall_prepare, + .runtime.sev_es_hcall_finish =3D hv_sev_es_hcall_finish, }; --=20 2.25.1