From nobody Tue Feb 10 05:45:08 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.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 Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1634739128760719.2284053478284; Wed, 20 Oct 2021 07:12:08 -0700 (PDT) Received: from localhost ([::1]:44860 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mdCK6-0007PI-S6 for importer@patchew.org; Wed, 20 Oct 2021 10:12:06 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41934) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mdCCh-0004cC-Lw for qemu-devel@nongnu.org; Wed, 20 Oct 2021 10:04:28 -0400 Received: from mail-ed1-x529.google.com ([2a00:1450:4864:20::529]:36366) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mdCCe-0006Vp-DO for qemu-devel@nongnu.org; Wed, 20 Oct 2021 10:04:27 -0400 Received: by mail-ed1-x529.google.com with SMTP id d3so27354186edp.3 for ; Wed, 20 Oct 2021 07:04:24 -0700 (PDT) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id a4sm1287095edk.71.2021.10.20.07.02.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Oct 2021 07:02:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0vUABkOdW3n1O+J/YlCSi4LCn6CSZ6NW/xi0cwG+LLU=; b=YwGxcfCRh9i+sBmBK3Ex4WWl4Fr53LQ/tafg0KmhORyumQUWN8tSZAxJnDzO2jtutF eAm+qAzEVZdd9WZ3iBTbnjPplSMLP4SMU2KW7hl1SdzunosZs4/oS+EbLKSOXxWIJR7G IyA+XMEjxFFRp9eAgKDK7fOiVWByMpW9NavxqxXFUVluJHoURm7ru7DEKYJhbLrixoIQ Tng1JqcUUp+I5IxxLWaLHRX4MdOjeV9gdvwLDMfb/k92CwMk4FX5Log3tlaQRi+Kxk0o gXLd/u2QMuPbbLtLQ1dzHi6P9aVztboafHAfWeVQ2801lnREMyavybeSTLQBPKK2GmHE 5MUA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=0vUABkOdW3n1O+J/YlCSi4LCn6CSZ6NW/xi0cwG+LLU=; b=s+sLTeXwf/ayhxy48YFAsOixO35zm606e1i5jmnhV+7VlJpXi2Pu9p8KqBufr6MvYi lAqtsA+Y1eVUCIa3DgR48v3KrDfOQk4MHN6GqSRLcjxmbSYU7E8zzTXpXUrQ8a+3y+E1 RYi/xquBqO5N+9FC38/y13VCSimPDrDZDdEe6Uv4Fm54doxWbiUkrtznw8/X+GWNUqk2 Err59NInKBCTZDhUpYdwQ4g+CN7BXQz/sEZw/jvLfckQayCtG5tJ78aeyFxGjseCtnia 1o7jQpmJjIZDTgsFuCsnMQgldQ7V9Hepxcsyszav8Bb+RASnlQLq7IUnuky8ouLdEk+C wGNA== X-Gm-Message-State: AOAM530Cdjypn8xAtRNKA00gCSguSDl4w/H45KLp/tVCKc/znKbWoYW6 SEDAExIlixtnLrk7uSCqZxHQ1uHklYY= X-Google-Smtp-Source: ABdhPJxg1JIKWZz2JOOShqCDGB0IemY7/Wbl9lZAYRAfm17nUXMu8G2cmIe/2DzNfD3SYm5IUiNxLw== X-Received: by 2002:a17:907:330e:: with SMTP id ym14mr48792751ejb.417.1634738571901; Wed, 20 Oct 2021 07:02:51 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PATCH 2/3] optionrom: add a DMA-enabled multiboot ROM Date: Wed, 20 Oct 2021 16:02:43 +0200 Message-Id: <20211020140244.485249-3-pbonzini@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20211020140244.485249-1-pbonzini@redhat.com> References: <20211020140244.485249-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=2a00:1450:4864:20::529; envelope-from=paolo.bonzini@gmail.com; helo=mail-ed1-x529.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.248, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action 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: adam@l4re.org, marcus.haehnel@kernkonzept.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1634739130641100001 From: Marcus H=C3=A4hnel Add a new option rom for the multiboot loader, using DMA transfers to copy data instead of "rep insb". This significantly lowers QEMU's startup latency by a factor of about 40, for example, going from 30sec to 0.8sec when loading modules of 120MB in size. Signed-off-by: Marcus H=C3=A4hnel Signed-off-by: Adam Lackorzynski [Modified to keep the non-DMA code depending on #ifdef USE_FW_CFG_DMA; do not write below stack. - Paolo] Signed-off-by: Paolo Bonzini Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- pc-bios/meson.build | 1 + pc-bios/multiboot_dma.bin | Bin 0 -> 1024 bytes pc-bios/optionrom/Makefile | 4 +- pc-bios/optionrom/multiboot.S | 4 +- pc-bios/optionrom/multiboot_dma.S | 2 + pc-bios/optionrom/optionrom.h | 66 ++++++++++++++++++++++++++++++ 6 files changed, 72 insertions(+), 5 deletions(-) create mode 100644 pc-bios/multiboot_dma.bin create mode 100644 pc-bios/optionrom/multiboot_dma.S diff --git a/pc-bios/meson.build b/pc-bios/meson.build index a44c9bc127..b40ff3f2bd 100644 --- a/pc-bios/meson.build +++ b/pc-bios/meson.build @@ -63,6 +63,7 @@ blobs =3D files( 'petalogix-s3adsp1800.dtb', 'petalogix-ml605.dtb', 'multiboot.bin', + 'multiboot_dma.bin', 'linuxboot.bin', 'linuxboot_dma.bin', 'kvmvapic.bin', diff --git a/pc-bios/multiboot_dma.bin b/pc-bios/multiboot_dma.bin new file mode 100644 index 0000000000000000000000000000000000000000..c0e2c3102a3358207c61d3ae113= 524fb6007abc3 GIT binary patch literal 1024 zcmd^-v1=3D1i9LIlmUTlcNU1}{N5`u&{DAHSmq6iKdix;GHRxaNnR0AR{3q;@~8~^LMo;4s!p158nI!-tWur_ul*P<{!&% z=3D%3>xm5f`4Bq!!)`Rkwf;(oFd*qcAb=3DmhXX1)X>Bw-tylkUpR_ETXkH1AnO4L$nJ| zWJui_M1kmKmTID)P`mI^=3DHM`~{VB1t1l_Ye=3DLor4X5{8Gd)zzw_o4<6zLQJ!drMolrKNZG2Z|kTOyaJIhYFc^ zFhhuQ9`r5fQLCrm#T4^_QylQ>8kgs;ZX9bIEiXb`8AIxu;?h~d%9izBkKht%WM1G* z^E{W9(OT9dt5in2qF}|dPH>dL>{=3DsV#-U1yFoWnOtw14D$&k*SUtsT%wS`ki@#&rUrnmtuDv`PtJm(Kg?H$Pdc0CL@YCy4R