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From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
To: Eric Anholt <eric@anholt.net>
Cc: Boris Brezillon <boris.brezillon@collabora.com>,
	kernel@collabora.com, dri-devel@lists.freedesktop.org,
	Rob Herring <robh+dt@kernel.org>,
	Neil Armstrong <narmstrong@baylibre.com>
Subject: Re: [PATCH 2/3] drm/panfrost: Expose HW counters to userspace
Date: Fri, 5 Apr 2019 09:17:23 -0700	[thread overview]
Message-ID: <20190405161723.GC9160@rosenzweig.io> (raw)
In-Reply-To: <87wok8tqf3.fsf@anholt.net>

> You can extend ioctl structs safely.  When older userspace passes theirs
> in, it has the shorter length encoded in the cmd. The kernel allocates
> the newest version's space, copies in the shorter struct, and
> zero-extends the rest.

Understood, thank you!
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  reply	other threads:[~2019-04-05 16:17 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-04 15:20 [PATCH 0/3] drm/panfrost: Expose HW counters to userspace Boris Brezillon
2019-04-04 15:20 ` [PATCH 1/3] drm/panfrost: Move gpu_{write, read}() macros to panfrost_regs.h Boris Brezillon
2019-04-04 15:20 ` [PATCH 2/3] drm/panfrost: Expose HW counters to userspace Boris Brezillon
2019-04-04 15:41   ` Alyssa Rosenzweig
2019-04-04 18:17     ` Boris Brezillon
2019-04-04 22:40       ` Alyssa Rosenzweig
2019-04-05 15:36     ` Eric Anholt
2019-04-05 16:17       ` Alyssa Rosenzweig [this message]
2019-04-04 15:20 ` [PATCH 3/3] panfrost/drm: Define T860 perf counters Boris Brezillon
2019-04-05 15:20 ` [PATCH 0/3] drm/panfrost: Expose HW counters to userspace Steven Price
2019-04-05 16:33   ` Alyssa Rosenzweig
2019-04-05 17:40     ` Boris Brezillon
2019-04-05 17:43       ` Alyssa Rosenzweig
2019-04-30 12:42   ` Boris Brezillon
2019-04-30 13:10     ` Rob Clark
2019-04-30 15:49       ` Jordan Crouse
2019-05-12 13:40         ` Boris Brezillon
2019-05-13 15:00           ` Jordan Crouse
2019-05-01 17:12     ` Eric Anholt
2019-05-12 13:17       ` Boris Brezillon
2019-05-11 22:32     ` Alyssa Rosenzweig
2019-05-12 13:38       ` Boris Brezillon
2019-05-13 12:48         ` Steven Price
2019-05-13 13:39           ` Boris Brezillon
2019-05-13 14:13             ` Steven Price
2019-05-13 14:56             ` Alyssa Rosenzweig

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