Re: [RFT 1/2] RISC-V: handle missing "no-map" properties for OpenSBI's PMP protected regions

From: Conor Dooley <conor@kernel.org>
To: Conor Dooley <conor.dooley@microchip.com>
Cc: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	geert+renesas@glider.be, Atish Patra <atishp@rivosinc.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	apatel@ventanamicro.com, alexghiti@rivosinc.com,
	Bjorn Topel <bjorn@rivosinc.com>,
	suagrfillet@gmail.com, jeeheng.sia@starfivetech.com,
	petrtesarik@huaweicloud.com, linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org,
	prabhakar.mahadev-lad.rj@bp.renesas.com
Subject: Re: [RFT 1/2] RISC-V: handle missing "no-map" properties for OpenSBI's PMP protected regions
Date: Tue, 19 Dec 2023 17:18:19 +0000	[thread overview]
Message-ID: <20231219-fernlike-device-4d7186aa4deb@spud> (raw)
In-Reply-To: <20231207-buffalo-varmint-de843c8a12bb@wendy>

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Hey,

On Thu, Dec 07, 2023 at 01:11:23PM +0000, Conor Dooley wrote:
> On Thu, Dec 07, 2023 at 01:02:00PM +0000, Lad, Prabhakar wrote:
> > On Wed, Dec 6, 2023 at 2:26 PM Conor Dooley <conor@kernel.org> wrote:
> > > On Wed, Dec 06, 2023 at 04:52:11AM -0800, Palmer Dabbelt wrote:
> > > > On Thu, 10 Aug 2023 02:07:10 PDT (-0700), Conor Dooley wrote:
> 
> > > > > I'm perfectly happy to drop this series though, if people generally are
> > > > > of the opinion that this sort of firmware workaround is ill-advised.
> > > > > We are unaffected by it, so I certainly have no pressure to have
> > > > > something working here. It's my desire not to be user-hostile that
> > > > > motivated this patch.
> > > >
> > > > IIUC you guys and Reneas are the only ones who have hardware that might be
> > > > in a spot where users aren't able to update the firmware (ie, it's out in
> > > > production somewhere).
> > >
> > > I dunno if we can really keep thinking like that though. In terms of
> > > people who have devicetrees in the kernel and stuff available in western
> > > catalog distribution, sure.
> > > I don't think we can assume that that covers all users though, certainly
> > > the syntacore folks pop up every now and then, and I sure hope that
> > > Andes etc have larger customer bases than the in-kernel users would
> > > suggest.
> > >
> > > > So I'm adding Geert, though he probably saw this
> > > > months ago...
> > >
> > > Prabhakar might be a good call on that front. I'm not sure if the
> > > Renesas stuff works on affected versions of OpenSBI though, guess it
> > > depends on the sequencing of the support for the non-coherent stuff and
> > > when this bug was fixed.
> > >
> > ATM, I dont think there are any users who are using the upstream
> > kernel + OpenSBI (apart from me and Geert!). Currently the customers
> > are using the BSP releases.
> 
> That doesn't really answer whether or not you (and your customers) are
> using an affected version of the vendor OpenSBI?
> The affected range for OpenSBI itself is [v0.8 to v1.3).

Did you perhaps miss this mail Prabhakar?

Cheers,
Conor.

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