From nobody Mon Feb 9 16:19:41 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) client-ip=66.175.222.108; envelope-from=bounce+27952+80342+1787277+3901457@groups.io; helo=mail02.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+80342+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1631091753; cv=none; d=zohomail.com; s=zohoarc; b=GL2j6EHUtJrnjsXwwgsmC8gtbF3rZ4+PTJToCa045BcXjTyxCNE99bUCvv7dgPnZyTCccAzhstyMucRKWoVNOGGONt6QqVCkg97F8o+KRQ24iTnRei0oxsMokA4wNiX7iiDunvhk5fmPe5MoFTSDLRBLJvVsHkAqX2AUFzLo5OM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1631091753; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=vbD4FNuYLQiNTQGQYd5LgWj4cuNSRuHmYmo1OjEzGl4=; b=X5qqbvng9xdWAK4ATbteBzlCTWBWD9pHQT4Wbt7nFN8lOBaCzAEtBCUDCzMBoKmqigKuFw2JAVOWky2CZWeJWtJCU/fBE+hBIHsL0uctF6cTpE2Q+mkkQoDlbgmAhj/d6T5Y/AjEQrFbImqOV6G07ypf1JViWZPnclWq6guJldc= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.108 as permitted sender) smtp.mailfrom=bounce+27952+80342+1787277+3901457@groups.io; dmarc=fail header.from= (p=none dis=none) Received: from mail02.groups.io (mail02.groups.io [66.175.222.108]) by mx.zohomail.com with SMTPS id 1631091753575296.8908102883697; Wed, 8 Sep 2021 02:02:33 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id 9772YY1788612x1ylvfF7zHz; Wed, 08 Sep 2021 02:02:33 -0700 X-Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mx.groups.io with SMTP id smtpd.web12.9007.1631091752635491645 for ; Wed, 08 Sep 2021 02:02:32 -0700 X-Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-270-9hVgFRO8N8SBaEHxRJrAqw-1; Wed, 08 Sep 2021 05:02:29 -0400 X-MC-Unique: 9hVgFRO8N8SBaEHxRJrAqw-1 X-Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 853F5107ACCA; Wed, 8 Sep 2021 09:02:27 +0000 (UTC) X-Received: from sirius.home.kraxel.org (unknown [10.39.192.91]) by smtp.corp.redhat.com (Postfix) with ESMTPS id C11AA196F1; Wed, 8 Sep 2021 09:02:19 +0000 (UTC) X-Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 052601800980; Wed, 8 Sep 2021 11:01:20 +0200 (CEST) From: "Gerd Hoffmann" To: devel@edk2.groups.io Cc: Jiewen Yao , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Michael D Kinney , Andrew Fish , Gerd Hoffmann , Jordan Justen , Leif Lindholm , Julien Grall , Anthony Perard , Ard Biesheuvel , Stefan Berger , Jiewen Yao Subject: [edk2-devel] [PATCH v3 18/19] OvmfPkg/Microvm: add README Date: Wed, 8 Sep 2021 11:01:18 +0200 Message-Id: <20210908090119.2378189-19-kraxel@redhat.com> In-Reply-To: <20210908090119.2378189-1-kraxel@redhat.com> References: <20210908090119.2378189-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Precedence: Bulk List-Unsubscribe: List-Subscribe: List-Help: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,kraxel@redhat.com X-Gm-Message-State: T8gTUiZ7Ny73tDjhfmtSvezYx1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1631091753; bh=koGmAd8S49LnnIvBAA7Vo9ZxYDjIxR2c8KrGcXGVbFM=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=rkDESG9JqeCJFKVG6OdvFWhE3isWbMc/UQHXEpnhM+85BcRRBP2F53vMVat85u8qU5m dcgK778nCxP0SIhu7FEpoUntUbo0+rLuUN4H3swViRQDRdO5LbCnT/gl+IWU0YzV4vYP/ ZgbpiO6r0nzDgeeZ6XAPEGHTscovnyzEry4= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1631091755254100002 Content-Type: text/plain; charset="utf-8" Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=3D3599 Signed-off-by: Gerd Hoffmann Acked-by: Jiewen Yao --- OvmfPkg/Microvm/README | 54 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 OvmfPkg/Microvm/README diff --git a/OvmfPkg/Microvm/README b/OvmfPkg/Microvm/README new file mode 100644 index 000000000000..78c2b53318de --- /dev/null +++ b/OvmfPkg/Microvm/README @@ -0,0 +1,54 @@ + +This is an *experimental* port of OVMF for the qemu microvm +machine type. + +microvm background info +----------------------- + +microvm is designed for modern, virtio-based workloads. Most legacy +lpc/isa devices like pit and pic can be turned off. virtio-mmio +(i.e. '-device virtio-{blk,net,scsi,...}-device') is used for +storage/network/etc. + +Optional pcie support is available and any pcie device supported by +qemu can be plugged in (including virtio-pci if you prefer that over +virtio-mmio). + +https://qemu.readthedocs.io/en/latest/system/i386/microvm.html +https://www.kraxel.org/blog/2020/10/qemu-microvm-acpi/ + +design issues +------------- + +Not fully clear yet how to do hardware detection best. Right now +using device tree to find virtio-mmio devices and pcie host bridge, +can reuse existing ArmVirtPkg code that way. Needs patched qemu. + +features +-------- + [working] serial console + [working] direct kernel boot + [in progress] virtio-mmio support + [in progress] pcie support + +known limitations +----------------- + * rtc=3Don is required for now. + * can't use separate code/vars (actually an microvm limitation, + there is no pflash support). + * transitional virtio-pci devices do not work. microvm doesn't + support ioports on pcie, and ovmf doesn't initialize pcie devices + with ioports if there is no address space for them (even though + pcie devices are required to be functional without ioports). + +known bugs +---------- + * timer has wrong frequency (running fast on my hardware). + +usage +----- +qemu-system-x86_64 \ + -nographic \ + -machine microvm,acpi=3Don,pit=3Doff,pic=3Doff,rtc=3Don \ + -bios /path/to/MICROVM.fd \ + [ ... more args here ... ] --=20 2.31.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. 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