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[149.6.153.187]) by smtp.gmail.com with ESMTPSA id s65sm3181026wmf.48.2019.12.06.03.36.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 06 Dec 2019 03:36:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=rEB0PYeg3rST9N64Dd3NGVhbxk+j4ecFYL8NdrsWizQ=; b=i9N40PxZ9zJY5umnbMRKBXEqEJHcinWs4l+kq6pnKYU8IljbK2S7ypNSo6xMaBAI1B PBvxY50Oi3//fN9r4uPRmqIUdrAZKBR13qSKai3TtCLaI+OT98RvO4++HaWOLLCrBH0F OqsfDsK4aWUY0NStw/RfeaxPHnmEvG9F3LkGHwPf+m+PFgCAJ5BHbQsOnn1tmU7ia/t2 byTAiHmVuTB5Rf5zASxekBoWTNBJqjP91o37gvNRpn4PPsVVSxepdjdoUOASh+UUSJ1d acwZyebwj8yyux2mDFYQND/gUgXqcSUlv2lNhGDe7aMzpt0tHXKsafgdLzkfQw0wKMJn xY8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=rEB0PYeg3rST9N64Dd3NGVhbxk+j4ecFYL8NdrsWizQ=; b=k5iy9odqxZVwr/PeCsfpUi8NgfV2zy1zpPU8jJGfcqQU7s+mEnVy30VGNwRG0QUVwb 8VLcG0OIa5x4xp4Gf8sd1glQgeq8ZSQMEumRFLaO0KQqjTZLO7TVBCsP+qw4VqjrBjO+ xF3O0of6EuY2/NXNm3LDrSKYGIEtRsqJuerwB7GggquGlOKPZ17EgQCH+X5gw/9LURvo N0OLbXntS9LhnAkK8gn7sSF5yUgnDXNe6p3QvlPmFjlvTO6S+HVBoWdHXbngo3RPrVDb xnLhDmwrajsTbs8IrtvN11nI1APCtys4VAyXFG5y3/gKQzwiOnTmTYVTwoja3chk+DfK lY3Q== X-Gm-Message-State: APjAAAUkcIA1TQibJh1UnJvSy7ezkMY7kMImlZ74QMZID23ICw7bg/3t MxWH9Gfp+iYQ2VRt0nGo2tlUVCE9 X-Google-Smtp-Source: APXvYqxkWkpXVEemPSjXlD/z5JmisUCVZpMeEHOhCOrANjdA3gseXRKwYea9HYBpBvRcIihsr46QGg== X-Received: by 2002:a5d:49c3:: with SMTP id t3mr15402872wrs.113.1575632198195; Fri, 06 Dec 2019 03:36:38 -0800 (PST) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 1/1] target/i386: disable VMX features if nested=0 Date: Fri, 6 Dec 2019 12:36:35 +0100 Message-Id: <20191206113635.6570-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191206113635.6570-1-pbonzini@redhat.com> References: <20191206113635.6570-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::443 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yang Zhong , Catherine Ho Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" From: Yang Zhong If kvm does not support VMX feature by nested=3D0, the kvm_vmx_basic can't get the right value from MSR_IA32_VMX_BASIC register, which make qemu coredump when qemu do KVM_SET_MSRS. The coredump info: error: failed to set MSR 0x480 to 0x0 kvm_put_msrs: Assertion `ret =3D=3D cpu->kvm_msr_buf->nmsrs' failed. Signed-off-by: Yang Zhong Message-Id: <20191206071111.12128-1-yang.zhong@intel.com> Reported-by: Catherine Ho Signed-off-by: Paolo Bonzini --- target/i386/kvm.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/i386/kvm.c b/target/i386/kvm.c index bf1655645b..1d10046a6c 100644 --- a/target/i386/kvm.c +++ b/target/i386/kvm.c @@ -2572,6 +2572,14 @@ static void kvm_msr_entry_add_vmx(X86CPU *cpu, Featu= reWordArray f) uint64_t kvm_vmx_basic =3D kvm_arch_get_supported_msr_feature(kvm_state, MSR_IA32_VMX_BASIC); + + if (!kvm_vmx_basic) { + /* If the kernel doesn't support VMX feature (kvm_intel.nested=3D0= ), + * then kvm_vmx_basic will be 0 and KVM_SET_MSR will fail. + */ + return; + } + uint64_t kvm_vmx_misc =3D kvm_arch_get_supported_msr_feature(kvm_state, MSR_IA32_VMX_MISC); --=20 2.21.0