From: Guo Ren <guoren@kernel.org>
To: Jean-Philippe Brucker <jean-philippe@linaro.org>
Cc: aou@eecs.berkeley.edu,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Arnd Bergmann <arnd@arndb.de>,
suzuki.poulose@arm.com, Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Palmer Dabbelt <palmer@sifive.com>,
christoffer.dall@arm.com, iommu@lists.linux-foundation.org,
Mike Rapoport <rppt@linux.ibm.com>,
Anup Patel <anup.Patel@wdc.com>,
Atish Patra <Atish.Patra@wdc.com>,
Julien Grall <julien.grall@arm.com>,
james.morse@arm.com, gary@garyguo.net,
Paul Walmsley <paul.walmsley@sifive.com>,
linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file
Date: Fri, 20 Sep 2019 08:07:38 +0800 [thread overview]
Message-ID: <CAJF2gTQtk7VhBgUan6WOZgc3UaQzHL8SxMi=yiHG-8eC207BbQ@mail.gmail.com> (raw)
In-Reply-To: <20190919151844.GG1013538@lophozonia>
On Thu, Sep 19, 2019 at 11:18 PM Jean-Philippe Brucker
<jean-philippe@linaro.org> wrote:
>
> The SMMU does support PCI Virtual Function - an hypervisor can assign a
> VF to a guest, and let that guest partition the VF into smaller contexts
> by using PASID. What it can't support is assigning partitions of a PCI
> function (VF or PF) to multiple Virtual Machines, since there is a
> single S2 PGD per function (in the Stream Table Entry), rather than one
> S2 PGD per PASID context.
>
In my concept, the two sentences "The SMMU does support PCI Virtual
Functio" v.s. "What it can't support is assigning partitions of a PCI
function (VF or PF) to multiple Virtual Machines" are conflict and I
don't want to play naming game :)
--
Best Regards
Guo Ren
ML: https://lore.kernel.org/linux-csky/
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next prev parent reply other threads:[~2019-09-20 0:07 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190321163623.20219-1-julien.grall@arm.com>
[not found] ` <20190321163623.20219-12-julien.grall@arm.com>
[not found] ` <0dfe120b-066a-2ac8-13bc-3f5a29e2caa3@arm.com>
[not found] ` <CAJF2gTTXHHgDboaexdHA284y6kNZVSjLis5-Q2rDnXCxr4RSmA@mail.gmail.com>
[not found] ` <c871a5ae-914f-a8bb-9474-1dcfec5d45bf@arm.com>
[not found] ` <20190619091219.GB7767@fuggles.cambridge.arm.com>
[not found] ` <CAJF2gTTmFq3yYa9UrdZRAFwJgC=KmKTe2_NFy_UZBUQovqQJPg@mail.gmail.com>
[not found] ` <20190619123939.GF7767@fuggles.cambridge.arm.com>
[not found] ` <CAJF2gTSiiiewTLwVAXvPLO7rTSUw1rg8VtFLzANdP2S2EEbTjg@mail.gmail.com>
[not found] ` <20190624104006.lvm32nahemaqklxc@willie-the-truck>
2019-09-07 23:52 ` [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file Guo Ren
2019-09-12 14:02 ` Will Deacon
2019-09-12 14:59 ` Guo Ren
2019-09-13 7:13 ` Guo Ren
2019-09-14 8:49 ` Guo Ren
2019-09-16 12:57 ` Jean-Philippe Brucker
2019-09-19 13:07 ` Guo Ren
2019-09-19 15:18 ` Jean-Philippe Brucker
2019-09-20 0:07 ` Guo Ren [this message]
2019-09-20 7:18 ` Jean-Philippe Brucker
2019-09-14 14:01 ` Palmer Dabbelt
2019-09-15 5:03 ` Anup Patel
2019-09-16 18:18 ` Will Deacon
2019-09-16 18:28 ` Palmer Dabbelt
2019-09-17 3:42 ` Anup Patel
2019-09-19 13:36 ` Guo Ren
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