From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zytor.com (terminus.zytor.com [198.137.202.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AAE3F136657; Sat, 29 Jun 2024 18:33:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.136 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719685989; cv=none; b=deEZEI4z5YHCeXfqDtv0t8XZI57Ck6AqVXDaRPhKVDNgHEsJ92zE4Jxh3yfZpInOAvNKaTa1tpFnXntP0xOIGXoH5z02v2VhdYwu9hL80EmcEjL2i/CyVj5ih+PTIxXsYBQhI4xDN+/rWLyjiiXhUKvKTagjnakd2CY1CptoE9Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719685989; c=relaxed/simple; bh=LvwoJCao6F3nNuus2bjVRQ+rYqxO5B0hTZiTUTknFjs=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=gywiLw3US0HNUB0wtJuESplBsJBvP8k8MUGrxzykYwR8JnaW3Mddmk2iU7YthnsS+CNOJqSIy3XzqOoHLh6zQ5FqGlgQl8bMFYP/Qyn0HpEPV95cLexhKrFrebrkV1jyzakW1X8IdfIK6UUzOBNktAExM2lxiAOwI8p1/+rnpRk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com; spf=pass smtp.mailfrom=zytor.com; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b=ei+sD8MF; arc=none smtp.client-ip=198.137.202.136 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=zytor.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=zytor.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=zytor.com header.i=@zytor.com header.b="ei+sD8MF" Received: from [192.168.7.205] ([71.202.166.45]) (authenticated bits=0) by mail.zytor.com (8.17.2/8.17.1) with ESMTPSA id 45TIWAO23565427 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NO); Sat, 29 Jun 2024 11:32:10 -0700 DKIM-Filter: OpenDKIM Filter v2.11.0 mail.zytor.com 45TIWAO23565427 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zytor.com; s=2024061501; t=1719685932; bh=EQ2vMgmQ/iIonY8TFZZEf4+MUqUkNJ4xDoc19GNiIxs=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ei+sD8MFKYWzgZscpEBrPr4YTSYBYuc6UsJVMnBIa7ccev7eGH4IkbEE0PmLvzk/F wTqrUQ5i3sRzaQWuq4Qeetvda1nszVkcYqgGiUvGYRfVAYk/1sDRV66Ws4w2UAPxX1 k1duHCmlahn62oTf6RpovAUiwbYZxmrtvvNXbWK9C66kcWWO+Ir7eSkj0ZaO0nUlS4 f1Fn+aKkhJH/M3naWQtxRdcOug3IrTzF2evsIaqZJ+0vnBeHr148zkpGMtfa790B6y 6CJF05s8gpzcPj5q2Jm8KyDWY4hD/ps64mVY0jmKrE9u1+MYwJnslVKfjTmwv9HzJX WyIotNhBfVUVA== Message-ID: Date: Sat, 29 Jun 2024 11:32:10 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 02/11] x86/irq: Define NMI source vectors To: Jacob Pan , X86 Kernel , Sean Christopherson , LKML , Thomas Gleixner , Dave Hansen , "H. Peter Anvin" , Ingo Molnar , Borislav Petkov , Xin Li , linux-perf-users@vger.kernel.org, Peter Zijlstra Cc: Paolo Bonzini , Tony Luck , Andy Lutomirski , acme@kernel.org, kan.liang@linux.intel.com, Andi Kleen , "Mehta, Sohil" References: <20240628201839.673086-1-jacob.jun.pan@linux.intel.com> <20240628201839.673086-3-jacob.jun.pan@linux.intel.com> Content-Language: en-US From: Xin Li Autocrypt: addr=xin@zytor.com; keydata= xsDNBGUPz1cBDACS/9yOJGojBFPxFt0OfTWuMl0uSgpwk37uRrFPTTLw4BaxhlFL0bjs6q+0 2OfG34R+a0ZCuj5c9vggUMoOLdDyA7yPVAJU0OX6lqpg6z/kyQg3t4jvajG6aCgwSDx5Kzg5 Rj3AXl8k2wb0jdqRB4RvaOPFiHNGgXCs5Pkux/qr0laeFIpzMKMootGa4kfURgPhRzUaM1vy bsMsL8vpJtGUmitrSqe5dVNBH00whLtPFM7IbzKURPUOkRRiusFAsw0a1ztCgoFczq6VfAVu raTye0L/VXwZd+aGi401V2tLsAHxxckRi9p3mc0jExPc60joK+aZPy6amwSCy5kAJ/AboYtY VmKIGKx1yx8POy6m+1lZ8C0q9b8eJ8kWPAR78PgT37FQWKYS1uAroG2wLdK7FiIEpPhCD+zH wlslo2ETbdKjrLIPNehQCOWrT32k8vFNEMLP5G/mmjfNj5sEf3IOKgMTMVl9AFjsINLHcxEQ 6T8nGbX/n3msP6A36FDfdSEAEQEAAc0WWGluIExpIDx4aW5Aenl0b3IuY29tPsLBDQQTAQgA NxYhBIUq/WFSDTiOvUIqv2u9DlcdrjdRBQJlD89XBQkFo5qAAhsDBAsJCAcFFQgJCgsFFgID AQAACgkQa70OVx2uN1HUpgv/cM2fsFCQodLArMTX5nt9yqAWgA5t1srri6EgS8W3F+3Kitge tYTBKu6j5BXuXaX3vyfCm+zajDJN77JHuYnpcKKr13VcZi1Swv6Jx1u0II8DOmoDYLb1Q2ZW v83W55fOWJ2g72x/UjVJBQ0sVjAngazU3ckc0TeNQlkcpSVGa/qBIHLfZraWtdrNAQT4A1fa sWGuJrChBFhtKbYXbUCu9AoYmmbQnsx2EWoJy3h7OjtfFapJbPZql+no5AJ3Mk9eE5oWyLH+ QWqtOeJM7kKvn/dBudokFSNhDUw06e7EoVPSJyUIMbYtUO7g2+Atu44G/EPP0yV0J4lRO6EA wYRXff7+I1jIWEHpj5EFVYO6SmBg7zF2illHEW31JAPtdDLDHYcZDfS41caEKOQIPsdzQkaQ oW2hchcjcMPAfyhhRzUpVHLPxLCetP8vrVhTvnaZUo0xaVYb3+wjP+D5j/3+hwblu2agPsaE vgVbZ8Fx3TUxUPCAdr/p73DGg57oHjgezsDNBGUPz1gBDAD4Mg7hMFRQqlzotcNSxatlAQNL MadLfUTFz8wUUa21LPLrHBkUwm8RujehJrzcVbPYwPXIO0uyL/F///CogMNx7Iwo6by43KOy g89wVFhyy237EY76j1lVfLzcMYmjBoTH95fJC/lVb5Whxil6KjSN/R/y3jfG1dPXfwAuZ/4N cMoOslWkfZKJeEut5aZTRepKKF54T5r49H9F7OFLyxrC/uI9UDttWqMxcWyCkHh0v1Di8176 jjYRNTrGEfYfGxSp+3jYL3PoNceIMkqM9haXjjGl0W1B4BidK1LVYBNov0rTEzyr0a1riUrp Qk+6z/LHxCM9lFFXnqH7KWeToTOPQebD2B/Ah5CZlft41i8L6LOF/LCuDBuYlu/fI2nuCc8d m4wwtkou1Y/kIwbEsE/6RQwRXUZhzO6llfoN96Fczr/RwvPIK5SVMixqWq4QGFAyK0m/1ap4 bhIRrdCLVQcgU4glo17vqfEaRcTW5SgX+pGs4KIPPBE5J/ABD6pBnUUAEQEAAcLA/AQYAQgA JhYhBIUq/WFSDTiOvUIqv2u9DlcdrjdRBQJlD89ZBQkFo5qAAhsMAAoJEGu9DlcdrjdR4C0L /RcjolEjoZW8VsyxWtXazQPnaRvzZ4vhmGOsCPr2BPtMlSwDzTlri8BBG1/3t/DNK4JLuwEj OAIE3fkkm+UG4Kjud6aNeraDI52DRVCSx6xff3bjmJsJJMb12mWglN6LjdF6K+PE+OTJUh2F dOhslN5C2kgl0dvUuevwMgQF3IljLmi/6APKYJHjkJpu1E6luZec/lRbetHuNFtbh3xgFIJx 2RpgVDP4xB3f8r0I+y6ua+p7fgOjDLyoFjubRGed0Be45JJQEn7A3CSb6Xu7NYobnxfkwAGZ Q81a2XtvNS7Aj6NWVoOQB5KbM4yosO5+Me1V1SkX2jlnn26JPEvbV3KRFcwV5RnDxm4OQTSk PYbAkjBbm+tuJ/Sm+5Yp5T/BnKz21FoCS8uvTiziHj2H7Cuekn6F8EYhegONm+RVg3vikOpn gao85i4HwQTK9/D1wgJIQkdwWXVMZ6q/OALaBp82vQ2U9sjTyFXgDjglgh00VRAHP7u1Rcu4 l75w1xInsg== In-Reply-To: <20240628201839.673086-3-jacob.jun.pan@linux.intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 6/28/2024 1:18 PM, Jacob Pan wrote: > When NMI-source reporting is supported, each logical processor maintains > a 16-bit NMI-source bitmap. It is up to the system software to assign NMI > sources for their matching vector (bit position) in the bitmap. > > Notice that NMI source vector is in a different namespace than the IDT > vectors. Though they share the same programming interface/field in the > NMI originator. > > This initial allocation of the NMI sources are limited to local NMIs in > that there is no external device NMI usage yet. > > Signed-off-by: Jacob Pan > --- > arch/x86/include/asm/irq_vectors.h | 28 ++++++++++++++++++++++++++++ > 1 file changed, 28 insertions(+) > > diff --git a/arch/x86/include/asm/irq_vectors.h b/arch/x86/include/asm/irq_vectors.h > index 13aea8fc3d45..e4cd33bc4fef 100644 > --- a/arch/x86/include/asm/irq_vectors.h > +++ b/arch/x86/include/asm/irq_vectors.h > @@ -105,6 +105,34 @@ > > #define NR_VECTORS 256 > > +/* > + * The NMI senders specify the NMI source vector as an 8bit integer in their s/The NMI senders/NMI senders/ > + * vector field with NMI delivery mode. A local APIC receiving an NMI will > + * set the corresponding bit in a 16bit bitmask, which is accumulated until > + * the NMI is delivered. > + * When a sender didn't specify an NMI source vector the source vector will > + * be 0, which will result in bit 0 of the bitmask being set. For out of > + * bounds vectors >= 16 bit 0 will also be set. > + * When bit 0 is set, system software must invoke all registered NMI handlers > + * as if NMI source feature is not enabled. Add empty lines in the above paragraph. > + * > + * Vector 2 is reserved for matching IDT NMI vector where it may be hardcoded > + * by some external devices. > + * > + * The NMI source vectors are sorted by descending priority with the exceptions > + * of 0 and 2. > + */ > +#define NMI_SOURCE_VEC_UNKNOWN 0 > +#define NMI_SOURCE_VEC_IPI_REBOOT 1 /* Crash reboot */ > +#define NMI_SOURCE_VEC_IDT_NMI 2 /* Match IDT NMI vector 2 */ > +#define NMI_SOURCE_VEC_IPI_SMP_STOP 3 /* Panic stop CPU */ > +#define NMI_SOURCE_VEC_IPI_BT 4 /* CPU backtrace */ > +#define NMI_SOURCE_VEC_PMI 5 /* PerfMon counters */ > +#define NMI_SOURCE_VEC_IPI_KGDB 6 /* KGDB */ > +#define NMI_SOURCE_VEC_IPI_MCE 7 /* MCE injection */ > +#define NMI_SOURCE_VEC_IPI_TEST 8 /* For remote and local IPIs */ > +#define NR_NMI_SOURCE_VECTORS 9 Fix alignment. > + > #ifdef CONFIG_X86_LOCAL_APIC > #define FIRST_SYSTEM_VECTOR POSTED_MSI_NOTIFICATION_VECTOR > #else