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Thu, 09 Oct 2025 10:08:53 -0700 (PDT) Date: Thu, 9 Oct 2025 12:08:52 -0500 From: Andrew Jones To: Yao Zihong Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, alexghiti@rivosinc.com, shuah@kernel.org, samuel.holland@sifive.com, evan@rivosinc.com, cleger@rivosinc.com, zihongyao@outlook.com, zhangyin2018@iscas.ac.cn, Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Charlie Jenkins , Jesse Taube , Inochi Amaoto , Aleksa Paunovic , Thomas =?utf-8?Q?Wei=C3=9Fschuh?= , Yunhui Cui , Nam Cao Subject: Re: [PATCH v2 2/4] riscv: hwprobe: Report Zicbop presence and block size Message-ID: <20251009-643d7302be8ec611ea622aff@orel> References: <20251009134318.23040-1-zihong.plct@isrc.iscas.ac.cn> <20251009134318.23040-3-zihong.plct@isrc.iscas.ac.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251009134318.23040-3-zihong.plct@isrc.iscas.ac.cn> On Thu, Oct 09, 2025 at 09:41:52PM +0800, Yao Zihong wrote: > Plumb Zicbop into hwprobe. Semantics mirror Zicbom/Zicboz to keep > userspace expectations aligned. > > Signed-off-by: Yao Zihong > --- > arch/riscv/kernel/sys_hwprobe.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/arch/riscv/kernel/sys_hwprobe.c b/arch/riscv/kernel/sys_hwprobe.c > index 000f4451a9d8..7a6ae1327504 100644 > --- a/arch/riscv/kernel/sys_hwprobe.c > +++ b/arch/riscv/kernel/sys_hwprobe.c > @@ -113,6 +113,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair, > EXT_KEY(ZCB); > EXT_KEY(ZCMOP); > EXT_KEY(ZICBOM); > + EXT_KEY(ZICBOP); > EXT_KEY(ZICBOZ); > EXT_KEY(ZICNTR); > EXT_KEY(ZICOND); > @@ -293,6 +294,11 @@ static void hwprobe_one_pair(struct riscv_hwprobe *pair, > if (hwprobe_ext0_has(cpus, RISCV_HWPROBE_EXT_ZICBOM)) > pair->value = riscv_cbom_block_size; > break; > + case RISCV_HWPROBE_KEY_ZICBOP_BLOCK_SIZE: > + pair->value = 0; > + if (hwprobe_ext0_has(cpus, RISCV_HWPROBE_EXT_ZICBOP)) > + pair->value = riscv_cbop_block_size; > + break; > case RISCV_HWPROBE_KEY_HIGHEST_VIRT_ADDRESS: > pair->value = user_max_virt_addr(); > break; > -- > 2.47.2 > Reviewed-by: Andrew Jones