Date: Wed, 13 Jan 2021 11:08:26 +0100 From: Emmanuel Vadot <manu@bidouilliste.com> To: Konstantin Belousov <kostikbel@gmail.com> Cc: Emmanuel Vadot <manu@freebsd.org>, src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org, myfreeweb <greg@unrelenting.technology> Subject: Re: git: 11d62b6f31ab - main - linuxkpi: add kernel_fpu_begin/kernel_fpu_end Message-ID: <20210113110826.46fbc900b3c375e7215a8195@bidouilliste.com> In-Reply-To: <X/2hR9Hi3Jhf5ZNs@kib.kiev.ua> References: <202101121143.10CBh02x095972@gitrepo.freebsd.org> <X/2hR9Hi3Jhf5ZNs@kib.kiev.ua>
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On Tue, 12 Jan 2021 15:16:55 +0200 Konstantin Belousov <kostikbel@gmail.com> wrote: > On Tue, Jan 12, 2021 at 11:43:00AM +0000, Emmanuel Vadot wrote: > > The branch main has been updated by manu: > > > > URL: https://cgit.FreeBSD.org/src/commit/?id=11d62b6f31ab4e99df6d0c6c23406b57eaa37f41 > > > > commit 11d62b6f31ab4e99df6d0c6c23406b57eaa37f41 > > Author: Emmanuel Vadot <manu@FreeBSD.org> > > AuthorDate: 2021-01-12 11:02:38 +0000 > > Commit: Emmanuel Vadot <manu@FreeBSD.org> > > CommitDate: 2021-01-12 11:31:00 +0000 > > > > linuxkpi: add kernel_fpu_begin/kernel_fpu_end > > > > With newer AMD GPUs (>=Navi,Renoir) there is FPU context usage in the > > amdgpu driver. > > The `kernel_fpu_begin/end` implementations in drm did not even allow nested > > begin-end blocks. > > Does Linux allow more then one thread to execute kernel_fpu_begin ? I actually have no idea, adding Greg to cc. -- Emmanuel Vadot <manu@bidouilliste.com>
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