From mboxrd@z Thu Jan 1 00:00:00 1970 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 1116AC4332F for ; Sat, 19 Nov 2022 03:48:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232532AbiKSDsh (ORCPT ); Fri, 18 Nov 2022 22:48:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37954 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232544AbiKSDra (ORCPT ); Fri, 18 Nov 2022 22:47:30 -0500 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DFF5BF803; Fri, 18 Nov 2022 19:46:58 -0800 (PST) Received: by mail-pf1-x433.google.com with SMTP id d192so6681472pfd.0; Fri, 18 Nov 2022 19:46:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; 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=Dn38defXSzafrqFyjuRL6cm4llsqPTH+TKtsPBjqhmM=; b=U9SmzWmMPdi+GTCOWAVMDuYMa2ra4/VmRWt71/144RtiJ/lAeGqiEUf9zUG9O851GN TJTrQSmKkbDgG/zbFAqoVnUE47fp9hSqWBdJQ6Fv//j/0fK8ihzrAneaDGhjiq7frp5M BsyLUZGfsDZWfuQ0XBXbjpn/lAcw+PpQBFDlfCq/3XnaRu4NVibrG5xg2/87bDApaG+M MZI+e9CkPlIpOjgQ6vQELW1E1GVk/PdEN1xDcCy9P/gOPJJkUxelSA9qe3lJOc0FMnq+ 6Jl2i1NzBcSaiRzkNyEIKXum6edHYgSDykoZklpFl2nInrceTYIdMfvfSOpN3HutCEGK moWg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=Dn38defXSzafrqFyjuRL6cm4llsqPTH+TKtsPBjqhmM=; b=HhbLCJDiTGgDWgmMaQQoZIjDmE0h6Dngl4GQDTTe457bmZvDlwoG2vGgmizjtZ0koa iuVssxUCUtTGfEJ+lDFwZXn8bb9s+jwdn/D7r5HzdY1erC/QnpNF2nyh21VBAb+r3Kbd NtNxtXhozTjxEGeuRWQ9kncrOEc930VnGYeHhSQfdJFvstAdyIKnk/4K5XhuygYQ7YCJ 252yYFxjS3vSCMfswDYKD2ttsUg7WVGwdhLwgvhCxu6vI2ADHYmWRL9UGRyeqFoeHlQn wtNcfXx/9iVy/qAclBNd+3CNAMc+YEXMwB4fDygCwwMbpDeMwoQRusSrH+7Z8ylYt1Be DWZg== X-Gm-Message-State: ANoB5pkfK+wjjK36MbohjrCeu7D0FZv4AcfuBVkERGIXMMUHs1ubhSbl XIkL/RclgllYCt8tAdlKmVc= X-Google-Smtp-Source: AA0mqf5+5sUTrnmfWZqryMJVyu9lhL8pbYtiSGhKCtpMEVtjuBaAVD20Qoa02B7aO8gczuxUSv/olg== X-Received: by 2002:a63:48b:0:b0:43b:f6df:3356 with SMTP id 133-20020a63048b000000b0043bf6df3356mr9461903pge.352.1668829617938; Fri, 18 Nov 2022 19:46:57 -0800 (PST) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:38:f087:1794:92c5:f8f0]) by smtp.gmail.com with ESMTPSA id e5-20020a056a0000c500b005360da6b26bsm3913892pfj.159.2022.11.18.19.46.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Nov 2022 19:46:57 -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 V2 14/18] x86/hyperv: Add hyperv-specific hadling for VMMCALL under SEV-ES Date: Fri, 18 Nov 2022 22:46:28 -0500 Message-Id: <20221119034633.1728632-15-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221119034633.1728632-1-ltykernel@gmail.com> References: <20221119034633.1728632-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-hyperv@vger.kernel.org From: Tianyu Lan Add Hyperv-specific handling for faults caused by VMMCALL instructions. Signed-off-by: Tianyu Lan --- arch/x86/kernel/cpu/mshyperv.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index b266f648e5cd..a4e526378603 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -725,6 +725,20 @@ static bool __init ms_hyperv_msi_ext_dest_id(void) return eax & HYPERV_VS_PROPERTIES_EAX_EXTENDED_IOAPIC_RTE; } +static void hv_sev_es_hcall_prepare(struct ghcb *ghcb, struct pt_regs *regs) +{ + /* 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 = { .name = "Microsoft Hyper-V", .detect = ms_hyperv_platform, @@ -732,4 +746,6 @@ const __initconst struct hypervisor_x86 x86_hyper_ms_hyperv = { .init.x2apic_available = ms_hyperv_x2apic_available, .init.msi_ext_dest_id = ms_hyperv_msi_ext_dest_id, .init.init_platform = ms_hyperv_init_platform, + .runtime.sev_es_hcall_prepare = hv_sev_es_hcall_prepare, + .runtime.sev_es_hcall_finish = hv_sev_es_hcall_finish, }; -- 2.25.1