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From: Ingo Molnar <mingo@kernel.org>
To: "Jürgen Groß" <jgross@suse.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
	Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH 05/32] x86/mtrr: Stop using 32-bit MSR interfaces
Date: Thu, 2 Jul 2026 11:15:43 +0200	[thread overview]
Message-ID: <akYsP5la7hw_pKEL@gmail.com> (raw)
In-Reply-To: <83b55b6e-1828-40a3-b296-105897fed3ad@suse.com>


* Jürgen Groß <jgross@suse.com> wrote:

> > > alternative I could use struct msr by doing:
> > > 
> > >    rdmsrq(MSR_K6_UWCCR, msr.q);
> > >    regs[0] = msr.l;
> > >    regs[1] = msr.h;
> > > 
> > >    ...
> > > 
> > >    msr.l = regs[0];
> > >    msr.h = regs[1];
> > >    wrmsrq(MSR_K6_UWCCR, msr.q);
> 
> I think it would be easier to just use that initially. I can change the
> patch accordingly.
> 
> > Or just move regs[] over to a struct msr variable use?
> 
> That would be nasty, as the index used for addressing the correct regs[]
> member is _calculated_, so for each access there would need to be an "if".

Ok, fair enough.

Thanks,

	Ingo

  reply	other threads:[~2026-07-02  9:15 UTC|newest]

Thread overview: 80+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-29  6:04 [PATCH 00/32] x86/msr: Drop 32-bit MSR interfaces Juergen Gross
2026-06-29  6:04 ` [PATCH 01/32] thermal/intel: Stop using " Juergen Gross
2026-07-02  9:31   ` Ingo Molnar
2026-07-02 11:18     ` Jürgen Groß
2026-06-29  6:04 ` [PATCH 02/32] powercap: " Juergen Gross
2026-06-29 11:25   ` Ingo Molnar
2026-06-29 11:33     ` Jürgen Groß
2026-06-29 12:31       ` Ingo Molnar
2026-06-29 12:52         ` Jürgen Groß
2026-06-29  6:04 ` [PATCH 03/32] edac: " Juergen Gross
2026-06-30  1:50   ` Zhuo, Qiuxu
2026-07-02 10:15   ` [tip: x86/msr] EDAC: " tip-bot2 for Juergen Gross
2026-06-29  6:04 ` [PATCH 04/32] acpi: " Juergen Gross
2026-06-30 12:30   ` Rafael J. Wysocki (Intel)
2026-06-30 12:42     ` Jürgen Groß
2026-07-02  9:17     ` Ingo Molnar
2026-07-02 11:33       ` Rafael J. Wysocki (Intel)
2026-06-29  6:04 ` [PATCH 05/32] x86/mtrr: " Juergen Gross
2026-06-29 11:33   ` Ingo Molnar
2026-06-29 11:41     ` Jürgen Groß
2026-06-29 12:27       ` Ingo Molnar
2026-06-29 13:04         ` Jürgen Groß
2026-07-02  9:15           ` Ingo Molnar [this message]
2026-06-29  6:04 ` [PATCH 06/32] x86/msr: Stop using 32-bit MSR interfaces in lib/msr-smp.c Juergen Gross
2026-07-02 10:16   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:04 ` [PATCH 07/32] x86/msr: Remove wrmsr_safe() Juergen Gross
2026-06-29  6:04 ` [PATCH 08/32] x86/mce: Stop using 32-bit MSR interfaces Juergen Gross
2026-07-02 10:16   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 09/32] KVM/x86: " Juergen Gross
2026-06-29  6:05 ` [PATCH 10/32] x86/hygon: " Juergen Gross
2026-07-02 10:16   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 11/32] x86/pci: " Juergen Gross
2026-07-02 10:16   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 12/32] x86/amd: " Juergen Gross
2026-07-02 10:16   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 13/32] x86/featctl: " Juergen Gross
2026-07-02  9:39   ` Ingo Molnar
2026-07-02 11:19     ` Jürgen Groß
2026-06-29  6:05 ` [PATCH 14/32] x86/tsc: " Juergen Gross
2026-07-02 10:15   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 15/32] x86/msr: Remove rdmsr_safe() Juergen Gross
2026-06-29  6:05 ` [PATCH 16/32] cpufreq: Stop using 32-bit MSR interfaces Juergen Gross
2026-06-29 14:55   ` Zhongqiu Han
2026-06-30  6:38     ` Juergen Gross
2026-06-29  6:05 ` [PATCH 17/32] x86/resctrl: " Juergen Gross
2026-07-01 16:49   ` Reinette Chatre
2026-07-02 10:15   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 18/32] x86/apic: " Juergen Gross
2026-07-02 10:15   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 19/32] x86/cpu: " Juergen Gross
2026-07-02 10:15   ` [tip: x86/msr] " tip-bot2 for Juergen Gross
2026-06-29  6:05 ` [PATCH 20/32] drivers/ata: " Juergen Gross
2026-06-29  6:05 ` [PATCH 21/32] agp/nvidia: " Juergen Gross
2026-06-29  6:05 ` [PATCH 22/32] fbdev/geode: " Juergen Gross
2026-06-29  6:05 ` [PATCH 23/32] hw_random/via-rng: " Juergen Gross
2026-06-29  6:05 ` [PATCH 24/32] drivers/gpio: " Juergen Gross
2026-06-29 10:33   ` Bartosz Golaszewski
2026-07-01  8:13   ` Linus Walleij
2026-07-01  8:32     ` Juergen Gross
2026-06-29  6:05 ` [PATCH 25/32] drivers/misc: " Juergen Gross
2026-06-29  6:05 ` [PATCH 26/32] x86/msr: Remove wrmsr() Juergen Gross
2026-06-29  6:05 ` [PATCH 27/32] x86/hyperv: Stop using 32-bit MSR interfaces Juergen Gross
2026-06-29  6:05 ` [PATCH 28/32] x86/olpc: " Juergen Gross
2026-06-29  6:05 ` [PATCH 29/32] hwmon: " Juergen Gross
2026-06-29 15:05   ` Guenter Roeck
2026-06-29  6:05 ` [PATCH 30/32] x86/msr: Remove rdmsr() Juergen Gross
2026-06-29  6:05 ` [PATCH 31/32] treewide: convert rdmsrq() from a macro to an inline function Juergen Gross
2026-06-29  6:05 ` [PATCH 32/32] x86/msr: Simplify some rdmsrq() use cases Juergen Gross
2026-06-29  6:52 ` [PATCH 00/32] x86/msr: Drop 32-bit MSR interfaces Arnd Bergmann
2026-06-29  7:01   ` Jürgen Groß
2026-06-29  8:06     ` Arnd Bergmann
2026-06-29  8:15       ` Jürgen Groß
2026-06-29  8:30         ` Jan Beulich
2026-06-29  8:38         ` Arnd Bergmann
2026-06-30 20:06           ` H. Peter Anvin
2026-06-29 11:19       ` Ingo Molnar
2026-06-30 18:59         ` Sean Christopherson
2026-07-01  8:33           ` Jürgen Groß
2026-07-02 10:07           ` Ingo Molnar
2026-07-02 11:03             ` Juergen Gross

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