From nobody Mon Feb 9 10:26:04 2026 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E348A158D8D for ; Fri, 23 Feb 2024 20:42:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708720972; cv=none; b=Yl1L/nD8KRQbEyPrittucUd+Tw60rqrBvbGPibet3bpwlv6/roolQfrLoawZSnE/awgaski6O7qneA9G4LfzcXySa9t5wnV4pGihow0VwCKe3/qyt2F3gSdV3bdM4urqVfytKl/kUdCr+GCxh/jKZfLtNHyJJNogeovdkaF3BO0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708720972; c=relaxed/simple; bh=x8JOCHKvKb4ozY0sAwrZiWMcGVvJkG+syIMQG5Dq5oA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=XE1kGwoOYdI3fLvJrtpGAdlTwL7e8nnfk67gZNzEv5KaaqzO2Pa1Lj9OSE1Uby5n1575JG1J2ylEknR027OReNHRvSk9uejvbxhWySrYA+pgEocik3o0oWmIFCC/FCWKp3rqu/4UDOffGGw+lgc0QSZ1xbCPJ0ePUZRjb0JZo9A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=bpT+2oIB; arc=none smtp.client-ip=209.85.128.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="bpT+2oIB" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-608ad239f8fso22867787b3.0 for ; Fri, 23 Feb 2024 12:42:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708720970; x=1709325770; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=FfzNCmRZ0S/1zY2q7LR3gyLGd166iHY+ytisyKJMCXE=; b=bpT+2oIBtxQEZ5sHzyTYn58ZEVbChWKoqeyVU7YgevVPbxsTMBbkFVxnBJ2vrYKRED QVN4vsNproJH7drfX9lXIMKf5c1rouM4YcdATbY/b4sWyk/Q1ZzxlWMvoS80slMAGfra 37omCqmeSOl548rP/Zdrj6j3fNT3aguQ97cFoprNR1E4U3MB1Q65cG7ycfMx8R7UcXLL NEXu2JUzFVQ6K32SstHAn4i5RWT9etYIDGIrn6YmotxX9sd8boKnROT2pkzCad9T+Te1 JavvoSrkDBcpSRHGVAGbc5a3rngICnIHoGwNbGY6qNJ64a+CW4XuLMDVLqMzIa4W9nyL D5CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708720970; x=1709325770; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=FfzNCmRZ0S/1zY2q7LR3gyLGd166iHY+ytisyKJMCXE=; b=atq7cv6O6MZJHpLkhDXnegsgiGByQt0OH5KRO70HfkWMiovyDvrZ3vQRhu68CjBgKj IIAGqJ1Qhx55EjA3JusQRFwQU5w6Gp5Kbh1HFkzAEJi7pKYuEBqPAO6EOF9l7/FaToHm S/2SI4OGwvbZkwKSBLtCs9Oh/KETcNpfphdo4Faqi0L4AfEuSfJ153Kh1/qWagg0/yXX zehmMkFgsPtGRhs2MNE/W1z/EUrJWKa6Ow6r1TSOAZZazhBETxSYtmQ+W6DWNPGHinDI MHmC3PyRwzM2RNEvvPrGWGQGnVS632yiBLcXWnG05KYS589/bJVP3eUfhNSJ9qffYRIE 0n8g== X-Forwarded-Encrypted: i=1; AJvYcCWT7Z+aPcEPtvCEvzUNI2ePkCqxXhLm56b4IcqtYzeAhjVvV6rb6XYy/U2GhJZ0O8pWT11gWrA++eXocovFgytSOawVPvj2BPs+kOdl X-Gm-Message-State: AOJu0YyKNCNCBEywvL0JinIKQp6kjxXukN0Tejv1MHVYpbSjSZtx2vdq JsGAYHfc3RTFPOdCpB3TIMGtXZ9FhxqHTwAQQQmhgRM6Be68FsujRvr0YIyfP5nQOZu7qrsTWst SQQ== X-Google-Smtp-Source: AGHT+IGV/hthBaiJp1W+WKWwI6YRWoUvbR1xriGM2Y9FcbsRPxmHxnvvDAebYds6DGtRf3myzVI02QFezT4= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:2602:b0:dc6:519b:5425 with SMTP id dw2-20020a056902260200b00dc6519b5425mr242656ybb.11.1708720969888; Fri, 23 Feb 2024 12:42:49 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 23 Feb 2024 12:42:32 -0800 In-Reply-To: <20240223204233.3337324-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240223204233.3337324-1-seanjc@google.com> X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Message-ID: <20240223204233.3337324-8-seanjc@google.com> Subject: [PATCH 7/8] KVM: SVM: Create a stack frame in __svm_sev_es_vcpu_run() From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Tom Lendacky , Michael Roth , Alexey Kardashevskiy Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Now that KVM uses the host save area to context switch RBP, i.e. preserves RBP for the entirety of __svm_sev_es_vcpu_run(), create a stack frame using the standared FRAME_{BEGIN,END} macros. Note, __svm_sev_es_vcpu_run() is subtly not a leaf function as it can call into ibpb_feature() via UNTRAIN_RET_VM. Signed-off-by: Sean Christopherson --- arch/x86/kvm/svm/vmenter.S | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S index 48cdba47622c..5461c23ee762 100644 --- a/arch/x86/kvm/svm/vmenter.S +++ b/arch/x86/kvm/svm/vmenter.S @@ -3,6 +3,7 @@ #include #include #include +#include #include #include #include "kvm-asm-offsets.h" @@ -312,6 +313,8 @@ SYM_FUNC_END(__svm_vcpu_run) * @spec_ctrl_intercepted: bool */ SYM_FUNC_START(__svm_sev_es_vcpu_run) + FRAME_BEGIN + /* * Save non-volatile (callee-saved) registers to the host save area. * Except for RAX and RSP, all GPRs are restored on #VMEXIT, but not @@ -362,6 +365,7 @@ SYM_FUNC_START(__svm_sev_es_vcpu_run) */ UNTRAIN_RET_VM =20 + FRAME_END RET =20 RESTORE_GUEST_SPEC_CTRL_BODY --=20 2.44.0.rc0.258.g7320e95886-goog