From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f226.google.com (mail-pg1-f226.google.com [209.85.215.226]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E70662FD7D3 for ; Mon, 18 May 2026 22:52:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.226 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779144750; cv=none; b=Hv7zUT8e7nG02fjFPnQZbQ+QGs7MQRY32mCzK/45xRGgbtvre0yREaiQSFZcv4D0yyW1bD8j1IGGF1SNQa8PoXaEA0mZ7lAFR0O0Jxi6JxkvKPOMvR3Bwa1MGUp3QZri65o2GDa8KoQvHiVHuETYvl9iAMvEmd+wgeKKH/ofpws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779144750; c=relaxed/simple; bh=GXFirbRQY8eofGnX+XhCUeN8t+xObvng6WItNjs0XUA=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MAUPwHWWSu4keHVGZvSOYhfGMy7IAWedBMy2/l5TUnAJ0RLmaOszrTagmAbZzolb28uWOe7elF83AnGqUFJlgcm3sL9Amq7AX7IyoJcQft/1Aple8OY024XunMxj1VTy835VOdw3cA56Y5SNrrwmKpIc5fTIXi4quqLlrFg91bs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com; spf=fail smtp.mailfrom=broadcom.com; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b=HuD6fs89; arc=none smtp.client-ip=209.85.215.226 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=broadcom.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=broadcom.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="HuD6fs89" Received: by mail-pg1-f226.google.com with SMTP id 41be03b00d2f7-c80148ae949so1072964a12.2 for ; Mon, 18 May 2026 15:52:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779144747; x=1779749547; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:dkim-signature:x-gm-gg:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=HLMyqZOyNhfQqrj2PAOWk68Yiq/VRAM+JvdOW2MXk6o=; b=lXVu/d07I9IFPMfy/rmYJUJxBBLoNhGPvo8cY4rJdCnY51QbKNRhjzWC/d3WJRgLv+ Rew34B6AFOoHDF1m7+ycG/Z/FXq2l9BrL546HECr2hxfco+j3P6x1giXCn+l/ppzRgBD 5BDoB1ApBxwgy2bGOnxOEazXcS4w+F3MOaznFM88XWofMfRNEgqbVXrGLAND4Ramzas2 MEIkM/g0djsRpJi1jzunbOGGCIKxqOHSaVFqq2kmVTiq3RoO89ZlDDhk4qWC+IF2lVng lLQIfDz5dixeaGerlLo/T4RF4IDIgr5+yXm2TdiayJoljG5Qp/KOYaOXIWL4GkFeam59 eOTw== X-Forwarded-Encrypted: i=1; AFNElJ+AAu0u1NCG0thRyr/ET9OAo0iojTAYGxvtddSXDcjmOE9PWWlr97rQCFMp39Q2OmvZ4zU+I0806zYIuyeNAg==@lists.linux.dev X-Gm-Message-State: AOJu0YzTdjxGgAWvCI4EPKv6/qpGvjiyzJI/jY3r9mUQVKXAEwV/s2sQ MpCvCeI9vgmXvj+9gbLWyoqn8Dp6mI4/C3jMqI6YY1GrcYAsl03LQF8wOY+eL5xjOW+HMDtTOQe e/f4LKjo1jJuEvnvVHDk+tNpMEmU8jwCEvwLMrrYPxGW1Ls6DW+n8BnhP+b8m3dc/zqqpv6tXe3 VZpRa3qbO42yPLiQsvtD+pT0QZGgwnN1cV8LT5Q9rvOccx4uHdk2NbzLRmwgGqFPxE7bB6nIkYS uVPS7/Y6LOS3XkDT6TEtKZEYw== X-Gm-Gg: Acq92OGFLjFJnv8mS6EUSXe47kNKf4zRz9yvB5rOCrNa6bJgo3+2uONH5bgswtyNHuw F8gG313Out2tPy6LQ/3OD07oh+S43LfQ+XOX115Q1c39H4CKPyo1nIwDnmW2xuEyDTV+GXmFlqv s2+Cu6ud749fgxyeqW+V1obV4r7dd3SSAZafFRg0IuE//BH2T04l2B+R1JmLPRhsWg5NnKYaW2u V8NdDnVHBlnwT1mQSfyU+o4OxhOCUObVJMBkLd7TM/SuSNEa9UbU/6F5woPr9ls7C52vkvL7rl1 VCLP4H4OoctXMd+k1rOqq4eaIyjzFWeIrj/5cUMOOKUCmdSGw4hW7IEvYGuyXTtAG94iq20WYmD gWC4yEWa2DAV7xzWtxsGCmPnEyx7VZjY6DCPAVrmPM3C+YV2yu1fxmDxRVtpLEX0NEFccerk6di p21EvyZ7lZ X-Received: by 2002:a17:903:1b70:b0:2bc:b80f:6782 with SMTP id d9443c01a7336-2bd7e7dcaa0mr188021575ad.11.1779144747196; Mon, 18 May 2026 15:52:27 -0700 (PDT) Received: from smtp-us-east1-p01-i01-si01.dlp.protect.broadcom.com ([144.49.247.127]) by smtp-relay.gmail.com with ESMTPS id d9443c01a7336-2bd5c35d715sm11962535ad.24.2026.05.18.15.52.26 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 May 2026 15:52:27 -0700 (PDT) X-Relaying-Domain: broadcom.com X-CFilter-Loop: Reflected Received: by mail-qv1-f72.google.com with SMTP id 6a1803df08f44-8aca14d1faaso79751096d6.3 for ; Mon, 18 May 2026 15:52:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1779144746; x=1779749546; darn=lists.linux.dev; h=content-transfer-encoding:in-reply-to:autocrypt:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:from:to:cc:subject:date:message-id:reply-to; bh=HLMyqZOyNhfQqrj2PAOWk68Yiq/VRAM+JvdOW2MXk6o=; b=HuD6fs89sEQqEHe3my0g93k6qsJ5Rcu5JPT4vwOahKv0HBub/V1NAm9OVicd+m9wa7 HoVCJuVJEAY/Llc5vyg8ZfhgfuVrnUEsMfWAecq1+BEAfjdYPDAGMeNGxxwl6EuYj1EG j3cGJQHWJm4swahNbZqdNSIKLwC/Yn9XNJkrs= X-Forwarded-Encrypted: i=1; AFNElJ/zt9gldYK98C+J29l7r4tjtK4LlCwXOsG8jzXDsYLyn5SP8R7RZLZ2tvnxe9IWm+cbV1gWAAI53xPvZfPqvg==@lists.linux.dev X-Received: by 2002:a05:6214:2343:b0:8ca:257d:1861 with SMTP id 6a1803df08f44-8ca257d1abbmr173747826d6.33.1779144746014; Mon, 18 May 2026 15:52:26 -0700 (PDT) X-Received: by 2002:a05:6214:2343:b0:8ca:257d:1861 with SMTP id 6a1803df08f44-8ca257d1abbmr173747486d6.33.1779144745575; Mon, 18 May 2026 15:52:25 -0700 (PDT) Received: from [10.66.193.70] ([192.19.161.250]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8ca3619c703sm71370436d6.33.2026.05.18.15.52.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 May 2026 15:52:24 -0700 (PDT) Message-ID: <70843c91-b1f7-4f5b-9960-43390df6dd2d@broadcom.com> Date: Mon, 18 May 2026 15:52:21 -0700 Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/4] x86/vmware: Hypercall refactoring and improved guest support To: x86@kernel.org, virtualization@lists.linux.dev, bp@alien8.de, hpa@zytor.com, dave.hansen@linux.intel.com, mingo@redhat.com, tglx@linutronix.de Cc: ajay.kaher@broadcom.com, brennan.lamoreaux@broadcom.com, bo.gan@broadcom.com, bcm-kernel-feedback-list@broadcom.com, linux-kernel@vger.kernel.org, kas@kernel.org, rick.p.edgecombe@intel.com, linux-coco@lists.linux.dev References: <20260307004238.1181299-1-alexey.makhalov@broadcom.com> <20260309235250.2611115-1-alexey.makhalov@broadcom.com> Content-Language: en-US From: Alexey Makhalov Autocrypt: addr=alexey.makhalov@broadcom.com; keydata= xsFNBGVo9lkBEACeouRIm6Q3QTvjcnPczfBqgLffURstVJz5nqjnrNR4T+8dwNrZB8PTgOWA QdGV4bIyqtNG7UHQuZ7sVKr2tx0gYJyQ5uZgncEHB5YIuhQ/CyAHrVmO+5/0/xWCLI0g44rF ZJqsYw2JQ2+vayTWbR65rkOiKL8GOVFNZanDg80BRh6qCmCEMXd/tymxvgnvWpHtxMgukexk 4vV9nV4XhxRVYdpLk8mBxsh+AEbHE+nbWgIuJDrmrZDGI2Dha7JFoB0Mi6hbbYd9BdkcHKQ7 6c+S1xOrZL3jX7OIFhb4NNnEOhh8/+BDlyby478p6YsimNa7TgAUbrygGyfVG8usrZy8SvO+ vUbVQwqjcJaCK1xazK12dfuZm2kSMJUrJqa9ng6OMjkE2/WrtnK8ruFNSCdytzbuheT0nYUJ Uwy84cU4p2K/N2C4vYjcn+IT+l1BFr5FViKYruoRLVH6zK/WOoZjA+Fc6tdM5nC1pgSB9c7h XLQqDSzYPzk3nqeHWG1qJ0Hu7pscIrjxyNTIZ5le0TlpblJdoRcL5maDNw22yle8m4D18ERF VrqNoqwW8fObMCHbd6C3m75lzerq1HhrSvLyU4UfprEyAcjOI1C0319SXfYlXDjKXRQyaDZP wxln8uShSitSSnx0AsSAjcUa8Cc7km81+G2WSK3S2wVIAN11awARAQABzS5BbGV4ZXkgTWFr aGFsb3YgPGFsZXhleS5tYWtoYWxvdkBicm9hZGNvbS5jb20+wsGNBBMBCAA3FiEEjLzRtST/ a5u42vOKbM7yHr5SJ3cFAmVo9lwFCQ0oaIACGwMECwkIBwUVCAkKCwUWAgMBAAAKCRBszvIe vlInd0jTD/9bZtjehewLRrW3dRDAbLG/+J5g1K4X5qQPfAo42NrhZQlOTibL7ixwq7NSXynZ V4Iu9jHAW++KXjxJzkg7zjBf9OOvvgCpqZGKYgWNvHHnX4eIVh8Ikp5JtvGPMBcRv7lJA5co kb+RHo9iRrB1dvRIOsP1SlGS85SiNA0yvmgqwbigLDmDRSWtvvt9XPwU1iqF+1OopT3UE10i /z+qE2ogcw2ADveBovq2W4JeQEBvlETwDKOdh8Q3UBHOqrZUrL7YjpUxgmb89FcjdDzUU95I fCB5YxF0hUctxFH5Uujh2F4qk0m2rp7+aOGtxWCJUqkHXjgpOoxyn0FPZiZlDkst84NO5OSI 5ZFPwaFqxUrFF+cFCY2O/UE2gpoK9Lt3gYNK6o2WIAtufuiYVdK6lANMkBgZ+t2fDLIN147a 172zu8XnyJMTo+tVfUjxwqynoR/NSWpVPs0Ck3K0LGjQE0tJ6HZrH0vudXk3YaiqW+D4CtGh I17Pk0h6x8LCdjmWmuDXoc99ezOEFSyWuTHjAYxx3cmgSUyIhdHtimuf0CVLTcFoBErb/5pJ zjb11Cj0HP87FMH57bnD3qyfkBMOB6tztfdt3vkCBaWkxaiTGXNhwr4IiLUoi90yIdXDMcTj /gvnjXgN+31iYgPWgTOdUEQud0DwDwuDwkzx/0x4sF1Dfc7BTQRlaPZcARAAuGkoYKWcrCh8 5RffedM6uBZ4p5Z4+RVj05uq7hlAwhHUpLP/XGbgNzhJP375Lonmnuyg2x7oHxfiwOohuuiA MnhSeEXn2qWZJuHosrYxs9y2zyiE/GTUAcqKiYBFa/96zOaZjHpNuQ5qSHYL64WhqvtmCQYg fL+jes2Z4IXl2R7MrN9OE+G3A3pOAo8TZKUEmlUV85fSmgopIX+hCiSQmRNRtp2jK6hd2+38 YAXc+eRxYgXKaWX5zeBgNrfM7Oxeh/0iWRZPWstTvVH2xMlzywOB3e/fqg+Q3NlPGDrTyHoc L86ZELSLcMTFn+RXw8lX8oVjTcQA0M8sQHB5g0JEWtMsFjnQZkJGCfeh0Odbn/F8nZ6LQQtu +fjc/4n9vRun+PZjdhd3W9ZM9D87W9XJg9txIaYnoUXBLLpHK/OirFfr5cJTUf4svtE3EVXb x6P9vr7zqUbE0f76h1eDPmyMwFAuibIXhNoEoKQtEjLX9aKgKYny3hczRiuQpA+6U4oTNn4S /CEqphLPT53aMH0w4x0CebMPozf24ZE9YphdX8ECclLBlDL1/zx2xKrJNw8v6wdXMSfsybBW 98b5b1eVBk1uc1UMlpDl7AIHyCMTjL9Ha85eoya/Hk9l93aVHgK04hOBY2ED1/ZRpj0M5P5m tNX1JqZunpyvKooT1PrJr4UAEQEAAcLBfAQYAQgAJhYhBIy80bUk/2ubuNrzimzO8h6+Uid3 BQJlaPZeBQkNKGiAAhsMAAoJEGzO8h6+Uid3SDoQAI3XXqsehWKvyAVeGXPxmkk+Suos/nJC xZWjp4U2xbbegBnNWladZoNdlVW/WV+FSFsN5IWztxQTWBMI12A0dx+Ooi9PSIANnlN+gQsA 9WeQ5iDNveEHZyK1GmuqZ3M3YZ1r3T2KyzTnPPZQ1B8gMQ442bOBWe077MqtLaC0J1jHyWHU j6BbUCAyR2/OCV/n1bH4wYIm2lgrOd2WuzoAGvju+j2g7hMRxw/xeHeu8S0czHuEZ0dC6fR1 ZKUOw03+mM/xRzL1be6RVS9AF7R5oDd11RrTOb7k14z0inFqSRrRwzOPKcuMxrApcquar336 3FQuLcJLjBo/SAOh2JatOkkwkw5PZseqdwcAk5+wcCbdYy8J8ttR04iV1FzrdQp8HbVxGNo7 AlDn1qtoHzvJHSQG51tbXWfLIi1ek3tpwJWj08+Zo+M47X6B65g7wdrwCiiFfclhXhI1eJNy fqqZgi3rxgu4sc5lmR846emZ/Tx85/nizqWCv7xUBxQwmhRPZRW+37vS2OLpyrTtBj3/tEM9 m9GMmTZqaJFeK7WCpprJV4jNHpWZuNAsQrdK1MrceIxb0/6wYe0xK79lScxms+zs9pGTrO4U 5RoS4gXK65ECcBH8/mumV6oBmLrNxKUrzTczdo9PnkmRyZcAa6AndbjmQDznwxvTZu2LjMPC EuY0 In-Reply-To: <20260309235250.2611115-1-alexey.makhalov@broadcom.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e On 3/9/26 4:52 PM, Alexey Makhalov wrote: > This series improves VMware guest support on x86 by refactoring the > hypercall infrastructure and adding better crash diagnostics, along > with encrypted guest support for the steal time clock. > > The first patch introduces a common vmware_hypercall() backend selected > via static calls. It consolidates the existing hypercall mechanisms > (backdoor, VMCALL/VMMCALL, and TDX) behind a single interface and > selects the optimal implementation at boot. This reduces duplication > and simplifies future extensions. > > Building on top of the new hypercall infrastructure, the next two > patches improve post-mortem debugging of VMware guests. They export > panic information to the hypervisor by dumping kernel messages to the > VM vmware.log on the host and explicitly reporting guest crash event > to the hypervisor. > > The final patch adds support for encrypted guests by ensuring that the > shared memory used for the steal time clock is mapped as decrypted > before being shared with the hypervisor. This enables steal time > accounting to function correctly when guest memory encryption is > enabled. > > Patch overview: > > 1. x86/vmware: Introduce common vmware_hypercall > > * Consolidate hypercall implementations behind a common API > * Select backend via static_call at boot > > 2. x86/vmware: Log kmsg dump on panic > > * Register a kmsg dumper > * Export panic logs to the host > > 3. x86/vmware: Report guest crash to the hypervisor > > * Register a panic notifier > * Notify the hypervisor about guest crashes > > 4. x86/vmware: Support steal time clock for encrypted guests > > * Mark shared steal time memory as decrypted early in boot > > > Changelog: > > V1 -> V2 > * Fix compilation warnings in patch 2 "x86/vmware: Log kmsg dump on panic" > reported by kernel test robot > > > Alexey Makhalov (4): > x86/vmware: Introduce common vmware_hypercall() > x86/vmware: Log kmsg dump on panic > x86/vmware: Report guest crash to the hypervisor > x86/vmware: Support steal time clock for encrypted guests > > arch/x86/include/asm/vmware.h | 276 ++++++++------------ > arch/x86/kernel/cpu/vmware.c | 470 +++++++++++++++++++++++++--------- > 2 files changed, 463 insertions(+), 283 deletions(-) > > > base-commit: 7d08a6ad25f85c9bb7d0382142838cb54713f1a3 Gentle reminder to review this change. Thanks, --Alexey