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RE: [RFC PATCH 1/1] x86/traps: Get rid of exception handlers' second argument error code
- To: "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Li, Xin3" <xin3.li@xxxxxxxxx>
- Date: Fri, 4 Aug 2023 17:19:45 +0000
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- Cc: "Lutomirski, Andy" <luto@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, "Gross, Jurgen" <jgross@xxxxxxxx>, "Ostrovsky, Boris" <boris.ostrovsky@xxxxxxxxxx>
- Delivery-date: Fri, 04 Aug 2023 17:20:16 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHZxq1luoPee3LE20qWOZPEmJublq/Z7qYAgABzAbA=
- Thread-topic: [RFC PATCH 1/1] x86/traps: Get rid of exception handlers' second argument error code
> On 04/08/2023 8:57 am, Xin Li wrote:
> > I haven't checked Xen implications with this change, i.e., does Xen
> > hypervisor need to adjust how it passes arguments to PV guests?
>
> This is an internal detail of how Linux handles data on it's stacks, isn't it?
Yes, it is completely internal to Linux.
> The Xen code in Linux will need adjustment to match, but this is not a
> hypervisor
> ABI (which obviously can't and won't change).
You're right! Thanks for confirming!
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