From nobody Mon Feb 9 01:19:44 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1569981743; cv=none; d=zoho.com; s=zohoarc; b=aqVFZzA3Tgd/neBOoYQG0IyXao/8MeNZZz800VPkE4Q7JShTeBn1Fki04pq1H4b0RJVBHrreHkR/2Mou6Z5U4+QfTu2dPj4Sexgzmk5nu7j5zGo+uEsaXwG34o3ofTDtPpb9LSuBpXYI+VVoHZK4GJiLpDIdywdQTJcsjBz7BsQ= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1569981743; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=1etyBp59fKsoGQvTf1tw0nugdAl4ss+Su7K+OuiHIOA=; b=Y4a9NaYzkV6kIRc4plzVlZx5bYv6dcRqIvdZJPltpPS0Fik5LbX2puS+pU8XmLBCsLfiFIFqXTsDDDrCsfLMxABqPaOZnwhGUdmed69VP3cSeaFkPVYyWtGa9KJ1y+BWXbKr7L/pQGP0JLvfAHdkbrrZ+sVyDe6u0FdCmfJuWB8= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1569981743706514.5564995150778; Tue, 1 Oct 2019 19:02:23 -0700 (PDT) Received: from localhost ([::1]:50504 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iFTy5-0006kM-8V for importer@patchew.org; Tue, 01 Oct 2019 22:02:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46821) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iFS0k-0001Lw-1E for qemu-devel@nongnu.org; Tue, 01 Oct 2019 19:56:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iFS0i-0002qf-IX for qemu-devel@nongnu.org; Tue, 01 Oct 2019 19:56:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54474) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iFS0d-0002hS-M3; Tue, 01 Oct 2019 19:56:49 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 3FE9218C4266; Tue, 1 Oct 2019 23:56:46 +0000 (UTC) Received: from probe.bos.redhat.com (dhcp-17-165.bos.redhat.com [10.18.17.165]) by smtp.corp.redhat.com (Postfix) with ESMTP id 78E8360BE0; Tue, 1 Oct 2019 23:56:44 +0000 (UTC) From: John Snow To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 7/8] bootdevice: FW_CFG interface for LCHS values Date: Tue, 1 Oct 2019 19:55:51 -0400 Message-Id: <20191001235552.17790-8-jsnow@redhat.com> In-Reply-To: <20191001235552.17790-1-jsnow@redhat.com> References: <20191001235552.17790-1-jsnow@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.62]); Tue, 01 Oct 2019 23:56:46 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 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: Fam Zheng , Kevin Wolf , Thomas Huth , qemu-block@nongnu.org, "Michael S. Tsirkin" , Laurent Vivier , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Arbel Moshe , Max Reitz , John Snow , "Gonglei \(Arei\)" , Sam Eiderman , Gerd Hoffmann , Stefan Hajnoczi , Paolo Bonzini , Laszlo Ersek , Karl Heubaum Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Sam Eiderman Using fw_cfg, supply logical CHS values directly from QEMU to the BIOS. Non-standard logical geometries break under QEMU. A virtual disk which contains an operating system which depends on logical geometries (consistent values being reported from BIOS INT13 AH=3D08) will most likely break under QEMU/SeaBIOS if it has non-standard logical geometries - for example 56 SPT (sectors per track). No matter what QEMU will report - SeaBIOS, for large enough disks - will use LBA translation, which will report 63 SPT instead. In addition we cannot force SeaBIOS to rely on physical geometries at all. A virtio-blk-pci virtual disk with 255 phyiscal heads cannot report more than 16 physical heads when moved to an IDE controller, since the ATA spec allows a maximum of 16 heads - this is an artifact of virtualization. By supplying the logical geometries directly we are able to support such "exotic" disks. We serialize this information in a similar way to the "bootorder" interface. The new fw_cfg entry is "bios-geometry". Reviewed-by: Karl Heubaum Reviewed-by: Arbel Moshe Signed-off-by: Sam Eiderman Message-id: 20190925110639.100699-8-sameid@google.com Signed-off-by: John Snow --- include/sysemu/sysemu.h | 1 + bootdevice.c | 32 ++++++++++++++++++++++++++++++++ hw/nvram/fw_cfg.c | 14 +++++++++++--- 3 files changed, 44 insertions(+), 3 deletions(-) diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h index 5bc5c79cbc..80c57fdc4e 100644 --- a/include/sysemu/sysemu.h +++ b/include/sysemu/sysemu.h @@ -106,6 +106,7 @@ void validate_bootdevices(const char *devices, Error **= errp); void add_boot_device_lchs(DeviceState *dev, const char *suffix, uint32_t lcyls, uint32_t lheads, uint32_t lsecs); void del_boot_device_lchs(DeviceState *dev, const char *suffix); +char *get_boot_devices_lchs_list(size_t *size); =20 /* handler to set the boot_device order for a specific type of MachineClas= s */ typedef void QEMUBootSetHandler(void *opaque, const char *boot_order, diff --git a/bootdevice.c b/bootdevice.c index 2b12fb85a4..b034ad7bdc 100644 --- a/bootdevice.c +++ b/bootdevice.c @@ -405,3 +405,35 @@ void del_boot_device_lchs(DeviceState *dev, const char= *suffix) } } } + +/* Serialized as: (device name\0 + lchs struct) x devices */ +char *get_boot_devices_lchs_list(size_t *size) +{ + FWLCHSEntry *i; + size_t total =3D 0; + char *list =3D NULL; + + QTAILQ_FOREACH(i, &fw_lchs, link) { + char *bootpath; + char *chs_string; + size_t len; + + bootpath =3D get_boot_device_path(i->dev, false, i->suffix); + chs_string =3D g_strdup_printf("%s %" PRIu32 " %" PRIu32 " %" PRIu= 32, + bootpath, i->lcyls, i->lheads, i->lse= cs); + + if (total) { + list[total - 1] =3D '\n'; + } + len =3D strlen(chs_string) + 1; + list =3D g_realloc(list, total + len); + memcpy(&list[total], chs_string, len); + total +=3D len; + g_free(chs_string); + g_free(bootpath); + } + + *size =3D total; + + return list; +} diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index 7dc3ac378e..18aff658c0 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -920,13 +920,21 @@ void *fw_cfg_modify_file(FWCfgState *s, const char *f= ilename, =20 static void fw_cfg_machine_reset(void *opaque) { + MachineClass *mc =3D MACHINE_GET_CLASS(qdev_get_machine()); + FWCfgState *s =3D opaque; void *ptr; size_t len; - FWCfgState *s =3D opaque; - char *bootindex =3D get_boot_devices_list(&len); + char *buf; =20 - ptr =3D fw_cfg_modify_file(s, "bootorder", (uint8_t *)bootindex, len); + buf =3D get_boot_devices_list(&len); + ptr =3D fw_cfg_modify_file(s, "bootorder", (uint8_t *)buf, len); g_free(ptr); + + if (!mc->legacy_fw_cfg_order) { + buf =3D get_boot_devices_lchs_list(&len); + ptr =3D fw_cfg_modify_file(s, "bios-geometry", (uint8_t *)buf, len= ); + g_free(ptr); + } } =20 static void fw_cfg_machine_ready(struct Notifier *n, void *data) --=20 2.21.0