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From: Christoph Hellwig <hch@lst.de>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Juergen Gross <jgross@suse.com>, Christoph Hellwig <hch@lst.de>,
	Tuowen Zhao <ztuowen@gmail.com>,
	AceLan Kao <acelan.kao@canonical.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Roman Gilg <subdiff@gmail.com>, Lee Jones <lee.jones@linaro.org>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-ia64@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Maarten Lankhorst <maarten.lankh>
Subject: Re: [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64
Date: Wed, 13 Nov 2019 07:27:08 +0000	[thread overview]
Message-ID: <20191113072708.GA3213@lst.de> (raw)
In-Reply-To: <20191112222423.GO11244@42.do-not-panic.com>

On Tue, Nov 12, 2019 at 10:24:23PM +0000, Luis Chamberlain wrote:
> I think this would be possible if we could flop ioremap_nocache() to UC
> instead of UC- on x86. Otherwise, I can't see how we can remove this by
> still not allowing direct MTRR calls.

If everything goes well ioremap_nocache will be gone as of 5.5.

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Juergen Gross <jgross@suse.com>, Christoph Hellwig <hch@lst.de>,
	Tuowen Zhao <ztuowen@gmail.com>,
	AceLan Kao <acelan.kao@canonical.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Roman Gilg <subdiff@gmail.com>, Lee Jones <lee.jones@linaro.org>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-ia64@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Souptick Joarder <jrdr.linux@gmail.com>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64
Date: Wed, 13 Nov 2019 07:27:08 +0000	[thread overview]
Message-ID: <20191113072708.GA3213@lst.de> (raw)
In-Reply-To: <20191112222423.GO11244@42.do-not-panic.com>

On Tue, Nov 12, 2019 at 10:24:23PM +0000, Luis Chamberlain wrote:
> I think this would be possible if we could flop ioremap_nocache() to UC
> instead of UC- on x86. Otherwise, I can't see how we can remove this by
> still not allowing direct MTRR calls.

If everything goes well ioremap_nocache will be gone as of 5.5.

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Juergen Gross <jgross@suse.com>, Christoph Hellwig <hch@lst.de>,
	Tuowen Zhao <ztuowen@gmail.com>,
	AceLan Kao <acelan.kao@canonical.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Roman Gilg <subdiff@gmail.com>, Lee Jones <lee.jones@linaro.org>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-ia64@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Maarten Lankhorst <maarten.lankh>
Subject: Re: [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64
Date: Wed, 13 Nov 2019 08:27:08 +0100	[thread overview]
Message-ID: <20191113072708.GA3213@lst.de> (raw)
In-Reply-To: <20191112222423.GO11244@42.do-not-panic.com>

On Tue, Nov 12, 2019 at 10:24:23PM +0000, Luis Chamberlain wrote:
> I think this would be possible if we could flop ioremap_nocache() to UC
> instead of UC- on x86. Otherwise, I can't see how we can remove this by
> still not allowing direct MTRR calls.

If everything goes well ioremap_nocache will be gone as of 5.5.

WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de>
To: Luis Chamberlain <mcgrof@kernel.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
	Juergen Gross <jgross@suse.com>, Christoph Hellwig <hch@lst.de>,
	Tuowen Zhao <ztuowen@gmail.com>,
	AceLan Kao <acelan.kao@canonical.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
	Roman Gilg <subdiff@gmail.com>, Lee Jones <lee.jones@linaro.org>,
	"Luis R. Rodriguez" <mcgrof@suse.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	X86 ML <x86@kernel.org>, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	linux-ia64@vger.kernel.org, Tony Luck <tony.luck@intel.com>,
	Fenghua Yu <fenghua.yu@intel.com>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Souptick Joarder <jrdr.linux@gmail.com>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Linux Fbdev development list <linux-fbdev@vger.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64
Date: Wed, 13 Nov 2019 08:27:08 +0100	[thread overview]
Message-ID: <20191113072708.GA3213@lst.de> (raw)
In-Reply-To: <20191112222423.GO11244@42.do-not-panic.com>

On Tue, Nov 12, 2019 at 10:24:23PM +0000, Luis Chamberlain wrote:
> I think this would be possible if we could flop ioremap_nocache() to UC
> instead of UC- on x86. Otherwise, I can't see how we can remove this by
> still not allowing direct MTRR calls.

If everything goes well ioremap_nocache will be gone as of 5.5.

  reply	other threads:[~2019-11-13  7:27 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-11 19:22 [PATCH] video: fbdev: atyfb: only use ioremap_uc() on i386 and ia64 Arnd Bergmann
2019-11-11 19:22 ` Arnd Bergmann
2019-11-11 19:22 ` Arnd Bergmann
2019-11-11 19:22 ` Arnd Bergmann
2019-11-12 10:55 ` Christoph Hellwig
2019-11-12 10:55   ` Christoph Hellwig
2019-11-12 10:55   ` Christoph Hellwig
2019-11-12 13:04   ` Daniel Vetter
2019-11-12 13:04     ` Daniel Vetter
2019-11-12 13:04     ` Daniel Vetter
2019-11-12 14:06     ` Christoph Hellwig
2019-11-12 14:06       ` Christoph Hellwig
2019-11-12 14:06       ` Christoph Hellwig
2019-11-12 14:06       ` Christoph Hellwig
2019-11-12 14:26       ` Daniel Vetter
2019-11-12 14:26         ` Daniel Vetter
2019-11-12 14:26         ` Daniel Vetter
2019-11-12 22:24         ` Luis Chamberlain
2019-11-12 22:24           ` Luis Chamberlain
2019-11-12 22:24           ` Luis Chamberlain
2019-11-13  7:27           ` Christoph Hellwig [this message]
2019-11-13  7:27             ` Christoph Hellwig
2019-11-13  7:27             ` Christoph Hellwig
2019-11-13  7:27             ` Christoph Hellwig
2019-11-13  7:38             ` Arnd Bergmann
2019-11-13  7:38               ` Arnd Bergmann
2019-11-13  7:38               ` Arnd Bergmann
2019-11-13  7:38               ` Arnd Bergmann
2019-11-13  7:38               ` Arnd Bergmann
2019-11-13  9:31               ` Andy Shevchenko
2019-11-13  9:31                 ` Andy Shevchenko
2019-11-13  9:31                 ` Andy Shevchenko
2019-11-13  9:31                 ` Andy Shevchenko
2019-11-13  9:31                 ` Andy Shevchenko
2019-11-13 18:45                 ` Luis Chamberlain
2019-11-13 18:45                   ` Luis Chamberlain
2019-11-13 18:45                   ` Luis Chamberlain
2019-11-12 22:17       ` Luis Chamberlain
2019-11-12 22:17         ` Luis Chamberlain
2019-11-12 22:17         ` Luis Chamberlain

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