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Message-ID: <SA1PR11MB673482336F1F1C7C68EAD320A8C2A@SA1PR11MB6734.namprd11.prod.outlook.com>
Date:   Wed, 27 Sep 2023 05:15:20 +0000
From:   "Li, Xin3" <xin3.li@...el.com>
To:     "andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>,
        Nikolay Borisov <nik.borisov@...e.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>
CC:     "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
        "Lutomirski, Andy" <luto@...nel.org>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "Christopherson,, Sean" <seanjc@...gle.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Gross, Jurgen" <jgross@...e.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        "mhiramat@...nel.org" <mhiramat@...nel.org>,
        "jiangshanlai@...il.com" <jiangshanlai@...il.com>
Subject: RE: [PATCH v11 05/37] x86/trapnr: Add event type macros to
 <asm/trapnr.h>

> >> +EVENT_TYPE_PRIV_SWEXC    5    // INT1 #define EVENT_TYPE_SWEXC    6
> >> +// INTO, INT3
> >
> > nit: This turned into INTO (Oh) rather than INT0( zero) in v11
> 
> Yes, v11 corrected a bug in v10.
> 
> The INTO instruction is "INT on Overflow".  No zero involved.
> 
> INT3 is thusly named because it generates vector 3.  Similarly for INT1 although it
> had the unofficial name ICEBP long before INT1 got documented.
> 
> If INTO were to have a number, it would need to be 4, but it's behaviour is
> conditional on the overflow flag, unlike INT3/1 which are unconditional
> exceptions.

live x86 SDM!

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