From: Drew Fustini <fustini@kernel.org>
To: yunhui cui <cuiyunhui@bytedance.com>
Cc: "Adrien Ricciardi" <aricciardi@baylibre.com>,
"Alexandre Ghiti" <alex@ghiti.fr>,
"Atish Kumar Patra" <atishp@rivosinc.com>,
"Atish Patra" <atish.patra@linux.dev>,
"Babu Moger" <babu.moger@amd.com>,
"Ben Horgan" <ben.horgan@arm.com>,
"Borislav Petkov" <bp@alien8.de>,
"Chen Pei" <cp0613@linux.alibaba.com>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Conor Dooley" <conor+dt@kernel.org>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Dave Martin" <Dave.Martin@arm.com>,
"Fenghua Yu" <fenghua.yu@intel.com>,
"Gong Shuai" <gong.shuai@sanechips.com.cn>,
"Gong Shuai" <gsh517@gmail.com>,
guo.wenjia23@zte.com.cn, "James Morse" <james.morse@arm.com>,
"Kornel Dulęba" <mindal@semihalf.com>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
liu.qingtao2@zte.com.cn,
"Liu Zhiwei" <zhiwei_liu@linux.alibaba.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Paul Walmsley" <pjw@kernel.org>,
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"Radim Krčmář" <rkrcmar@ventanamicro.com>,
"Reinette Chatre" <reinette.chatre@intel.com>,
"Rob Herring" <robh@kernel.org>,
"Samuel Holland" <samuel.holland@sifive.com>,
"Sebastian Andrzej Siewior" <bigeasy@linutronix.de>,
"Tony Luck" <tony.luck@intel.com>,
"Vasudevan Srinivasan" <vasu@rivosinc.com>,
"Ved Shanbhogue" <ved@rivosinc.com>,
"Weiwei Li" <liwei1518@gmail.com>,
linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
x86@kernel.org, devicetree@vger.kernel.org,
linux-rt-devel@lists.linux.dev, linux-doc@vger.kernel.org
Subject: Re: [External] [PATCH v2 3/8] riscv: Add support for srmcfg CSR from Ssqosid extension
Date: Sat, 27 Jun 2026 14:58:18 -0700 [thread overview]
Message-ID: <akBHesvINKE+nCXF@x1> (raw)
In-Reply-To: <CAEEQ3wkhiE=TdFTzEn39GVWSgGnaN0raBpmd=6sYaoh304LNBg@mail.gmail.com>
On Sat, Jun 27, 2026 at 05:38:28PM +0800, yunhui cui wrote:
> Hi Drew,
>
> On Thu, Jun 25, 2026 at 9:40 AM Drew Fustini <fustini@kernel.org> wrote:
[..]
> > +config RISCV_ISA_SSQOSID
> > + bool "Ssqosid extension support for supervisor mode Quality of Service ID"
> > + depends on 64BIT
>
> Why is 64BIT required here?
Sashiko raised many potential issues related to RV32 in reviews of my
RFC series:
v3: https://sashiko.dev/#/patchset/20260414-ssqosid-cbqri-rqsc-v7-0-v3-0-b3b2e7e9847a%40kernel.org
v4: https://sashiko.dev/#/patchset/20260510-ssqosid-cbqri-rqsc-v7-0-v4-0-eb53831ef683%40kernel.org
v5: https://sashiko.dev/#/patchset/20260524-ssqosid-cbqri-rqsc-v7-0-v5-0-78d3a7ba9dbe%40kernel.org
v6: https://sashiko.dev/#/patchset/20260601-ssqosid-cbqri-rqsc-v7-0-v6-0-baf00f50028a%40kernel.org
RV32 systems with CBQRI didn't seem likely to me so I decided requiring
64BIT would eliminate the potential issues that Sashiko raised. If there
is actually a 32-bit implementation that someone knows of, then I would
be happy to re-evaluate RV32 support.
Thanks,
Drew
next prev parent reply other threads:[~2026-06-27 21:58 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-25 1:38 [PATCH v2 0/8] riscv: Add Ssqosid and initial CBQRI resctrl support Drew Fustini
2026-06-25 1:38 ` [PATCH v2 1/8] dt-bindings: riscv: Add Ssqosid extension description Drew Fustini
2026-06-25 1:38 ` [PATCH v2 2/8] riscv: Detect the Ssqosid extension Drew Fustini
2026-06-25 1:38 ` [PATCH v2 3/8] riscv: Add support for srmcfg CSR from " Drew Fustini
2026-06-25 1:50 ` sashiko-bot
2026-06-27 9:11 ` [External] " yunhui cui
2026-06-27 21:21 ` Drew Fustini
2026-06-27 9:38 ` yunhui cui
2026-06-27 21:58 ` Drew Fustini [this message]
2026-06-25 1:38 ` [PATCH v2 4/8] riscv_cbqri: Add capacity controller probe and allocation device ops Drew Fustini
2026-06-27 9:19 ` [External] " yunhui cui
2026-06-27 21:45 ` Drew Fustini
2026-06-27 9:31 ` yunhui cui
2026-06-27 22:10 ` Drew Fustini
2026-06-25 1:38 ` [PATCH v2 5/8] riscv_cbqri: resctrl: Add cache allocation via capacity block mask Drew Fustini
2026-06-25 1:53 ` sashiko-bot
2026-06-25 1:38 ` [PATCH v2 6/8] riscv: Enable resctrl filesystem for Ssqosid Drew Fustini
2026-06-25 1:38 ` [PATCH v2 7/8] dt-bindings: riscv: Add generic CBQRI controller binding Drew Fustini
2026-06-25 16:19 ` Conor Dooley
2026-06-25 19:21 ` Drew Fustini
2026-06-26 15:44 ` Conor Dooley
2026-06-26 16:05 ` Drew Fustini
2026-06-26 16:08 ` Conor Dooley
2026-06-25 1:38 ` [PATCH v2 8/8] riscv_cbqri: Add CBQRI cache capacity-allocation platform driver Drew Fustini
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