From nobody Mon Feb 9 14:50:33 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+89192+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+89192+1787277+3901457@groups.io; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1650544099; cv=none; d=zohomail.com; s=zohoarc; b=YnC2QwzX9ZZ+1lmonqJYPm06fe2nvl3jejeofdikBPuHcnRMSxvRnAOktULSKmQiV0UQt9eYG7M9A1stW1LWQA+j4b5Xna4GS9bqEDzIcp66Zkj3mC+886t9/5g6gXbCf2vj4N8a8o6BcvK+yTD6va4zI++e2vc9ItVWHkCx0p4= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1650544099; 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=94O0H2Qrasx2m7hWUfd1vxaP2GpyV1q6gfHfPjutZZg=; b=JGIdH1ol6w7P7MUm0Px6xF+AhggUkdF9pwkBqeMglF0XxELXNwhr/+HJSH4vER2wwlRi8H4qPOYdQYccXonqPeJNR79CEHpTYThwxZ/CAWQ5r+KgPCijBHpg9neY0J5ouJA0sb3ue33uvwuaSXcIYDDNm3r2MRyBOFRov+FS7a8= 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+89192+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 1650544099277789.4174925919464; Thu, 21 Apr 2022 05:28:19 -0700 (PDT) Return-Path: X-Received: by 127.0.0.2 with SMTP id Jrj0YY1788612x4DjphS0pma; Thu, 21 Apr 2022 05:28:18 -0700 X-Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by mx.groups.io with SMTP id smtpd.web12.20733.1650544098141888200 for ; Thu, 21 Apr 2022 05:28:18 -0700 X-Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-439-aaPLL6FGOeauIpmKCnzBSQ-1; Thu, 21 Apr 2022 08:28:14 -0400 X-MC-Unique: aaPLL6FGOeauIpmKCnzBSQ-1 X-Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B97D480346E; Thu, 21 Apr 2022 12:28:13 +0000 (UTC) X-Received: from sirius.home.kraxel.org (unknown [10.39.192.9]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 23C2A20296A5; Thu, 21 Apr 2022 12:28:01 +0000 (UTC) X-Received: by sirius.home.kraxel.org (Postfix, from userid 1000) id 52BBB180086C; Thu, 21 Apr 2022 14:27:55 +0200 (CEST) From: "Gerd Hoffmann" To: devel@edk2.groups.io Cc: Pawel Polawski , Gerd Hoffmann , Ard Biesheuvel , Liming Gao , Hao A Wu , Ray Ni , Oliver Steffen , Leif Lindholm , Jiewen Yao , Jordan Justen , Abner Chang , Jian J Wang Subject: [edk2-devel] [PATCH v4 5/6] OvmfPkg/Microvm/pcie: mPhysMemAddressWidth tweak Date: Thu, 21 Apr 2022 14:27:54 +0200 Message-Id: <20220421122755.1436026-6-kraxel@redhat.com> In-Reply-To: <20220421122755.1436026-1-kraxel@redhat.com> References: <20220421122755.1436026-1-kraxel@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 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: S2cxDiZuRJ6OAo3amix5f0M1x1787277AA= Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1650544098; bh=DrNOX9Re/kPrepEntT4+fSaKFMqCvdlWWFVVDEHWycM=; h=Cc:Content-Type:Date:From:Reply-To:Subject:To; b=mjqwidieCBuAQn/BjXUV8k47LjcLGcLY6BC4gPUZwgBwdxliWFFouzlO1GxMSvEMVX5 JcbjiyT68OET+C6RWjEpqvPfRMyzswX4okAJC8zYWxrjaF64r3Z9Tg7rPLgwsrO2KrkEt zNhOUVnKjPQKXLyVrscvQoLjfHleiZDN92M= X-ZohoMail-DKIM: pass (identity @groups.io) X-ZM-MESSAGEID: 1650544100087100001 Content-Type: text/plain; charset="utf-8"; x-default="true" microvm places the 64bit mmio space at the end of the physical address space. So mPhysMemAddressWidth must be correct, otherwise the pci host bridge setup throws an error because it thinks the 64bit mmio window is not addressable. On microvm we can simply use standard cpuid to figure the address width because the host-phys-bits option (-cpu ${name},host-phys-bits=3Don) is forced to be enabled. Side note: For 'pc' and 'q35' this is not the case for backward compatibility reasons. Signed-off-by: Gerd Hoffmann --- OvmfPkg/Library/PlatformInitLib/MemDetect.c | 41 +++++++++++++++++++++ OvmfPkg/PlatformPei/Platform.c | 2 +- 2 files changed, 42 insertions(+), 1 deletion(-) diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/= PlatformInitLib/MemDetect.c index 83a7b6726bb7..c28d7601f87e 100644 --- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c +++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c @@ -491,6 +491,42 @@ PlatformGetFirstNonAddress ( return FirstNonAddress; } =20 +/* + * Use CPUID to figure physical address width. Does *not* work + * reliable on qemu. For historical reasons qemu returns phys-bits=3D40 + * even in case the host machine supports less than that. + * + * qemu has a cpu property (host-phys-bits=3D{on,off}) to change that + * and make sure guest phys-bits are not larger than host phys-bits., + * but it is off by default. Exception: microvm machine type + * hard-wires that property to on. + */ +VOID +EFIAPI +PlatformAddressWidthFromCpuid ( + IN OUT EFI_HOB_PLATFORM_INFO *PlatformInfoHob + ) +{ + UINT32 RegEax; + + AsmCpuid (0x80000000, &RegEax, NULL, NULL, NULL); + if (RegEax >=3D 0x80000008) { + AsmCpuid (0x80000008, &RegEax, NULL, NULL, NULL); + PlatformInfoHob->PhysMemAddressWidth =3D (UINT8)RegEax; + } else { + PlatformInfoHob->PhysMemAddressWidth =3D 36; + } + + PlatformInfoHob->FirstNonAddress =3D LShiftU64 (1, PlatformInfoHob->Phys= MemAddressWidth); + + DEBUG (( + DEBUG_INFO, + "%a: cpuid: phys-bits is %d\n", + __FUNCTION__, + PlatformInfoHob->PhysMemAddressWidth + )); +} + /** Initialize the PhysMemAddressWidth field in PlatformInfoHob based on gue= st RAM size. **/ @@ -503,6 +539,11 @@ PlatformAddressWidthInitialization ( UINT64 FirstNonAddress; UINT8 PhysMemAddressWidth; =20 + if (PlatformInfoHob->HostBridgeDevId =3D=3D 0xffff /* microvm */) { + PlatformAddressWidthFromCpuid (PlatformInfoHob); + return; + } + // // As guest-physical memory size grows, the permanent PEI RAM requiremen= ts // are dominated by the identity-mapping page tables built by the DXE IP= L. diff --git a/OvmfPkg/PlatformPei/Platform.c b/OvmfPkg/PlatformPei/Platform.c index f006755d5fdb..009db67ee60a 100644 --- a/OvmfPkg/PlatformPei/Platform.c +++ b/OvmfPkg/PlatformPei/Platform.c @@ -357,12 +357,12 @@ InitializePlatform ( =20 S3Verification (); BootModeInitialization (&mPlatformInfoHob); - AddressWidthInitialization (&mPlatformInfoHob); =20 // // Query Host Bridge DID // mPlatformInfoHob.HostBridgeDevId =3D PciRead16 (OVMF_HOSTBRIDGE_DID); + AddressWidthInitialization (&mPlatformInfoHob); =20 MaxCpuCountInitialization (&mPlatformInfoHob); =20 --=20 2.35.1 -=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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