linux-kernel - Re: [PATCH v9 03/24] virt: sev-guest: Make payload a variable length array

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Message-ID: <20240624061117.GBZnkOBR5FVW8i6qsG@fat_crate.local>
Date: Mon, 24 Jun 2024 08:11:17 +0200
From: Borislav Petkov <bp@...en8.de>
To: "Nikunj A. Dadhania" <nikunj@....com>
Cc: linux-kernel@...r.kernel.org, thomas.lendacky@....com, x86@...nel.org,
	kvm@...r.kernel.org, mingo@...hat.com, tglx@...utronix.de,
	dave.hansen@...ux.intel.com, pgonda@...gle.com, seanjc@...gle.com,
	pbonzini@...hat.com
Subject: Re: [PATCH v9 03/24] virt: sev-guest: Make payload a variable length
 array

On Sun, Jun 23, 2024 at 09:46:09PM +0530, Nikunj A. Dadhania wrote:
> Yes, payload was earlier fixed at 4000 bytes, without considering the size
> of snp_guest_msg.

Sorry, you'd need to try explaining this again. Who wasn't considering the
size of snp_guest_msg?

AFAICT, the code currently does sizeof(struct snp_guest_msg) which contains
both the header *and* the payload.

What could help is if you structure your commit message this way:

1. Prepare the context for the explanation briefly.

2. Explain the problem at hand.

3. "It happens because of <...>"

4. "Fix it by doing X"

5. "(Potentially do Y)."

And some of those above are optional depending on the issue being
explained.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette