From owner-freebsd-virtualization@freebsd.org Sat May 9 09:50:04 2020 Return-Path: Delivered-To: freebsd-virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A919E2E2606 for ; Sat, 9 May 2020 09:50:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (unknown [127.0.1.3]) by mx1.freebsd.org (Postfix) with ESMTP id 49K2Vh45tGz4WTM for ; Sat, 9 May 2020 09:50:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 8AEBC2E2605; Sat, 9 May 2020 09:50:04 +0000 (UTC) Delivered-To: virtualization@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 8AB0F2E2604 for ; Sat, 9 May 2020 09:50:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 49K2Vh3Cqsz4WTL for ; Sat, 9 May 2020 09:50:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 69DB519F72 for ; Sat, 9 May 2020 09:50:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 0499o4JD093461 for ; Sat, 9 May 2020 09:50:04 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 0499o4CF093460 for virtualization@FreeBSD.org; Sat, 9 May 2020 09:50:04 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: virtualization@FreeBSD.org Subject: [Bug 246168] Ubuntu 20.04 KVM / QEMU Failure with nested FreeBSD bhyve Date: Sat, 09 May 2020 09:50:04 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: bhyve X-Bugzilla-Version: 12.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: grehan@FreeBSD.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: virtualization@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-virtualization@freebsd.org X-Mailman-Version: 2.1.32 Precedence: list List-Id: "Discussion of various virtualization techniques FreeBSD supports." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 09 May 2020 09:50:04 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246168 --- Comment #10 from Peter Grehan --- I used a laptop-class CPU when trying the repro (core i5-8250U). In particu= lar, there is a difference in VT-x features as reported by the L1 guest: VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID vs your system: VT-x: PAT,HLT,MTF,PAUSE,EPT,UG,VPID,VID,PostIntr The one of interest here is that KVM is emulating APIC-virtualization (VID,PostIntr). One thing to try is to disable this feature in the L1 guest. In /boot/loader.conf, put an entry=20 hw.vmm.vmx.use_apic_vid=3D0 After (re)booting the L1 guest, the status of this parameter can be checked with: # sysctl hw.vmm.vmx.cap.virtual_interrupt_delivery hw.vmm.vmx.cap.virtual_interrupt_delivery: 0 <- should be zero --=20 You are receiving this mail because: You are the assignee for the bug.=