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From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Arnd Bergmann <arnd@kernel.org>, Ferry Toth <fntoth@gmail.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Matthew Wilcox <willy@infradead.org>,
	Sean Christopherson <seanjc@google.com>,
	Davide Ciminaghi <ciminaghi@gnudd.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	kvm@vger.kernel.org
Subject: Re: [PATCH 08/11] x86: document X86_INTEL_MID as 64-bit-only
Date: Thu, 5 Dec 2024 10:03:39 +0200	[thread overview]
Message-ID: <Z1FeWwoyJMA0Zx5z@smile.fi.intel.com> (raw)
In-Reply-To: <206b50a2-922f-4a29-8c1a-b8695b19e65c@app.fastmail.com>

On Wed, Dec 04, 2024 at 09:38:05PM +0100, Arnd Bergmann wrote:
> On Wed, Dec 4, 2024, at 19:55, Andy Shevchenko wrote:
> > On Wed, Dec 4, 2024 at 12:31 PM Arnd Bergmann <arnd@kernel.org> wrote:

...

> > It's all other way around (from SW point of view). For unknown reasons
> > Intel decided to release only 32-bit SW and it became the only thing
> > that was heavily tested (despite misunderstanding by some developers
> > that pointed finger to the HW without researching the issue that
> > appears to be purely software in a few cases) _that_ time.  Starting
> > ca. 2017 I enabled 64-bit for Merrifield and from then it's being used
> > by both 32- and 64-bit builds.
> >
> > I'm totally fine to drop 32-bit defaults for Merrifield/Moorefield,
> > but let's hear Ferry who might/may still have a use case for that.
> 
> Ok. I tried to find the oldest Android image and saw it used a 64-bit
> kernel, but that must have been after your work then.

I stand up corrected, what I said is related to Merrifield, Moorefield
may have 64-bit users on the phones from day 1, though.

...

> Changed now to
> 
>           The only supported devices are the 22nm Merrified (Z34xx) and
>           Moorefield (Z35xx) SoC used in the Intel Edison board and
>           a small number of Android devices such as the Asus Zenfone 2,
>           Asus FonePad 8 and Dell Venue 7.

LGTM, thanks!

...

> >> -         Intel MID platforms are based on an Intel processor and chipset which
> >> -         consume less power than most of the x86 derivatives.
> >
> > Why remove this? AFAIK it states the truth.
> 
> It seemed irrelevant for users that configure the kernel. I've
> put it back now.

It might be, but it was already there. Thanks for leaving it untouched.

-- 
With Best Regards,
Andy Shevchenko



  reply	other threads:[~2024-12-05  8:03 UTC|newest]

Thread overview: 77+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-12-04 10:30 [PATCH 00/11] x86: 32-bit cleanups Arnd Bergmann
2024-12-04 10:30 ` [PATCH 01/11] x86/Kconfig: Geode CPU has cmpxchg8b Arnd Bergmann
2024-12-04 10:30 ` [PATCH 02/11] x86: drop 32-bit "bigsmp" machine support Arnd Bergmann
2024-12-04 10:30 ` [PATCH 03/11] x86: Kconfig.cpu: split out 64-bit atom Arnd Bergmann
2024-12-04 13:16   ` Thomas Gleixner
2024-12-04 15:55     ` H. Peter Anvin
2024-12-04 18:21       ` Andy Shevchenko
2024-12-04 10:30 ` [PATCH 04/11] x86: split CPU selection into 32-bit and 64-bit Arnd Bergmann
2024-12-04 18:31   ` Andy Shevchenko
2024-12-04 21:18     ` Arnd Bergmann
2024-12-04 10:30 ` [PATCH 05/11] x86: remove HIGHMEM64G support Arnd Bergmann
2024-12-04 13:29   ` Brian Gerst
2024-12-04 13:43     ` Arnd Bergmann
2024-12-04 14:02       ` Brian Gerst
2024-12-04 15:00         ` Brian Gerst
2024-12-04 15:58         ` H. Peter Anvin
2024-12-04 15:53       ` H. Peter Anvin
2024-12-04 16:37     ` H. Peter Anvin
2024-12-04 16:55       ` Arnd Bergmann
2024-12-04 18:37         ` Andy Shevchenko
2024-12-04 21:14           ` Arnd Bergmann
2025-04-11 23:44   ` Dave Hansen
2025-04-12  8:39     ` Ingo Molnar
2025-04-12 10:05     ` Mike Rapoport
2025-04-12 10:44       ` Arnd Bergmann
2025-04-12 19:48       ` Ingo Molnar
2025-04-13  8:08         ` [PATCH] x86/e820: discard high memory that can't be addressed by 32-bit systems Mike Rapoport
2025-04-13  9:23           ` [tip: x86/urgent] x86/e820: Discard " tip-bot2 for Mike Rapoport (Microsoft)
2025-04-14 14:19             ` Dave Hansen
2025-04-15  7:18               ` Mike Rapoport
2025-04-15 13:43                 ` Dave Hansen
2025-04-16  7:17                   ` Ingo Molnar
2025-04-16  7:51                     ` Ingo Molnar
2025-04-16  7:24           ` tip-bot2 for Mike Rapoport (Microsoft)
2025-04-16  8:16           ` tip-bot2 for Mike Rapoport (Microsoft)
2025-04-17 16:22           ` [PATCH] x86/e820: discard " Nathan Chancellor
2025-04-18  6:33             ` Ingo Molnar
2025-04-18  9:01               ` Mike Rapoport
2025-04-18 12:59                 ` Ingo Molnar
2025-04-18 19:25                   ` Mike Rapoport
2025-04-18 19:29                     ` Dave Hansen
2025-04-18 19:49           ` Guenter Roeck
2025-04-12 10:40     ` [PATCH 05/11] x86: remove HIGHMEM64G support Arnd Bergmann
2024-12-04 10:30 ` [PATCH 06/11] x86: drop SWIOTLB and PHYS_ADDR_T_64BIT for PAE Arnd Bergmann
2024-12-04 18:41   ` Andy Shevchenko
2024-12-04 20:52     ` Arnd Bergmann
2024-12-05  7:59       ` Andy Shevchenko
2024-12-04 10:30 ` [PATCH 07/11] x86: drop support for CONFIG_HIGHPTE Arnd Bergmann
2024-12-04 10:30 ` [PATCH 08/11] x86: document X86_INTEL_MID as 64-bit-only Arnd Bergmann
2024-12-04 18:55   ` Andy Shevchenko
2024-12-04 20:38     ` Arnd Bergmann
2024-12-05  8:03       ` Andy Shevchenko [this message]
2024-12-06 11:23     ` Ferry Toth
2024-12-06 14:27       ` Arnd Bergmann
2024-12-04 10:30 ` [PATCH 09/11] x86: rework CONFIG_GENERIC_CPU compiler flags Arnd Bergmann
2024-12-04 15:36   ` Tor Vic
2024-12-04 17:51     ` Arnd Bergmann
2024-12-04 17:09   ` Nathan Chancellor
2024-12-04 17:52     ` Arnd Bergmann
2024-12-04 18:10   ` Linus Torvalds
2024-12-04 19:43     ` Arnd Bergmann
2024-12-04 23:33       ` Linus Torvalds
2024-12-05  8:13         ` Andy Shevchenko
2024-12-05 10:09           ` Arnd Bergmann
2024-12-05 11:17             ` Andy Shevchenko
2024-12-05 11:58               ` Arnd Bergmann
2024-12-05 12:35                 ` Jason A. Donenfeld
2024-12-05  9:46         ` Arnd Bergmann
2024-12-05 10:01           ` Andy Shevchenko
2024-12-05 10:47             ` Arnd Bergmann
2024-12-05  8:07       ` Andy Shevchenko
2024-12-06 13:56   ` David Laight
2024-12-04 10:30 ` [PATCH 10/11] x86: remove old STA2x11 support Arnd Bergmann
2024-12-05  7:35   ` Davide Ciminaghi
2024-12-04 10:30 ` [PATCH 11/11] x86: drop 32-bit KVM host support Arnd Bergmann
2024-12-04 15:30   ` Sean Christopherson
2024-12-04 16:33     ` Arnd Bergmann

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