linux-kernel - RE: [PATCH v12 24/37] x86/idtentry: Incorporate definitions/declarations of the FRED entries

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Date:   Tue, 28 Nov 2023 18:39:01 +0000
From:   "Li, Xin3" <xin3.li@...el.com>
To:     Borislav Petkov <bp@...en8.de>
CC:     "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>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "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>,
        "seanjc@...gle.com" <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>,
        "andrew.cooper3@...rix.com" <andrew.cooper3@...rix.com>,
        "jiangshanlai@...il.com" <jiangshanlai@...il.com>,
        "nik.borisov@...e.com" <nik.borisov@...e.com>
Subject: RE: [PATCH v12 24/37] x86/idtentry: Incorporate
 definitions/declarations of the FRED entries

> > FRED and IDT can share most of the definitions and declarations so
> > that in the majority of cases the actual handler implementation is the
> > same.
> >
> > The differences are the exceptions where FRED stores exception related
> > information on the stack and the sysvec implementations as FRED can
> > handle irqentry/exit() in the dispatcher instead of having it in each
> > handler.
> >
> > Also add stub defines for vectors which are not used due to Kconfig
> > decisions to spare the ifdeffery in the actual FRED dispatch code.
> >
> > Tested-by: Shan Kang <shan.kang@...el.com>
> > Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> > Signed-off-by: Xin Li <xin3.li@...el.com>
> 
> This makes me wonder too who the author is. The commit message text sounds
> like tglx. :)

You have a very good sense 😊

This is mostly from his review comments and suggestions on my original
changes to IDTENTRY.  So probably I should put a "Suggested-by" instead
of "Signed-off-by" as HPA pointed out!

Thanks!
    Xin