linux-kernel - Re: [PATCH kernel v2] x86/compressed/64: reduce #VC nesting for intercepted CPUID for SEV-SNP guest

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Message-ID: <ZRljbqRbaj+eoUU6@gmail.com>
Date:   Sun, 1 Oct 2023 14:17:50 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Alexey Kardashevskiy <aik@....com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>
Subject: Re: [PATCH kernel v2] x86/compressed/64: reduce #VC nesting for
 intercepted CPUID for SEV-SNP guest

* Borislav Petkov <bp@...en8.de> wrote:

> On Sun, Oct 01, 2023 at 08:40:30PM +1100, Alexey Kardashevskiy wrote:
> > Ingo says different, who wins? :)
> 
> I do: a function gives you type checking - a macro doesn't.

That's false, because this specific macro don't force any types, it
only passes types through as-is to type-checked functions, so both
the macro and the function variant does similar quality of type
checking ...

But I'm fine with both approaches, I suggested a macro because the
existing rdtsc definitions used macros already - but I have no
strong feelings which particular color this shed gets painted ...

Thanks,

	Ingo