Re: [patch V6 01/19] x86/cpu: Provide cpuid_read() et al.

From: Thomas Gleixner <tglx@linutronix.de>
To: Borislav Petkov <bp@alien8.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	x86@kernel.org, Tom Lendacky <thomas.lendacky@amd.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Arjan van de Ven <arjan@linux.intel.com>,
	Huang Rui <ray.huang@amd.com>, Juergen Gross <jgross@suse.com>,
	Dimitri Sivanich <dimitri.sivanich@hpe.com>,
	Sohil Mehta <sohil.mehta@intel.com>,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	Kan Liang <kan.liang@linux.intel.com>,
	Zhang Rui <rui.zhang@intel.com>,
	"Paul E. McKenney" <paulmck@kernel.org>,
	Feng Tang <feng.tang@intel.com>,
	Andy Shevchenko <andy@infradead.org>,
	Michael Kelley <mhklinux@outlook.com>,
	"Peter Zijlstra (Intel)" <peterz@infradead.org>,
	Wang Wendy <wendy.wang@intel.com>
Subject: Re: [patch V6 01/19] x86/cpu: Provide cpuid_read() et al.
Date: Wed, 14 Feb 2024 00:32:05 +0100	[thread overview]
Message-ID: <87v86seya2.ffs@tglx> (raw)
In-Reply-To: <20240213213650.GEZcvg8uvjPXTVhmHv@fat_crate.local>

On Tue, Feb 13 2024 at 22:36, Borislav Petkov wrote:

> On Tue, Feb 13, 2024 at 10:04:00PM +0100, Thomas Gleixner wrote:
>> +static inline void __cpuid_read(unsigned int leaf, unsigned int subleaf, u32 *regs)
>> +{
>> +	regs[CPUID_EAX] = leaf;
>> +	regs[CPUID_ECX] = subleaf;
>> +	__cpuid(regs, regs + 1, regs + 2, regs + 3);
>
> Yeah, 
>
> 	__cpuid(regs, regs + CPUID_EBX, regs + CPUID_ECX, regs + CPUID_EDX);
>
> explains what those numbers are.

Oops. Sorry, I missed that part of your previous reply and just
responded to the u32 *regs part. I'll send an update tomorrow.

Thanks,

        tglx