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[2001:1ae9:1c2:4c00:20f:c6b4:1e57:7965]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aac0e82f621sm69398766b.40.2024.12.19.06.12.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Dec 2024 06:12:31 -0800 (PST) Date: Thu, 19 Dec 2024 15:12:30 +0100 From: Andrew Jones To: Yunhui Cui Cc: punit.agrawal@bytedance.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, conor@kernel.org, cleger@rivosinc.com, charlie@rivosinc.com, evan@rivosinc.com, samuel.holland@sifive.com, andybnac@gmail.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] RISC-V: Enable Zicbom in usermode Message-ID: <20241219-4332cfcb6bd63baf5d0328d7@orel> References: <20241025091527.57825-1-cuiyunhui@bytedance.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20241025091527.57825-1-cuiyunhui@bytedance.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241219_061234_438561_D57AA31E X-CRM114-Status: GOOD ( 17.75 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Fri, Oct 25, 2024 at 05:15:27PM +0800, Yunhui Cui wrote: > Like Zicboz, by enabling the corresponding bits of senvcfg, > the instructions cbo.clean, cbo.flush, and cbo.inval can be > executed normally in user mode. > > Signed-off-by: Yunhui Cui > --- > arch/riscv/kernel/cpufeature.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > index 1992ea64786e..bc850518ab41 100644 > --- a/arch/riscv/kernel/cpufeature.c > +++ b/arch/riscv/kernel/cpufeature.c > @@ -924,7 +924,7 @@ unsigned long riscv_get_elf_hwcap(void) > void __init riscv_user_isa_enable(void) > { > if (riscv_has_extension_unlikely(RISCV_ISA_EXT_ZICBOZ)) > - current->thread.envcfg |= ENVCFG_CBZE; > + current->thread.envcfg |= ENVCFG_CBIE | ENVCFG_CBCFE | ENVCFG_CBZE; > else if (any_cpu_has_zicboz) > pr_warn("Zicboz disabled as it is unavailable on some harts\n"); > } > -- > 2.39.2 > Hi Yunhui, Do you plan to send a v2 of this? Thanks, drew _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv