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Sun, 11 Feb 2024 18:26:44 -0800 (PST) X-Forwarded-Encrypted: i=1; AJvYcCUfdeKz8qQ1Wm/LNrWafjLgkv2+Xkl8QrY/iZkgowaE8IySyAhm6B7a9c9c/cifytyBUKmSpQly+vFAnwjO1HIVW1XVe+DkIvqGaDhJ43ypOJnuMyTSRDRJMdhMKGU+Az55/4QPqYlZXa82EICvNRAepdBnJg4jItKVtMxdi7IV5ihxUtDCkD/VY9r2gLvJ Received: from sw06.internal.sifive.com ([4.53.31.132]) by smtp.gmail.com with ESMTPSA id mg8-20020a170903348800b001da27cbcf5dsm1719624plb.228.2024.02.11.18.26.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Feb 2024 18:26:44 -0800 (PST) From: Samuel Holland To: Andrew Jones , Palmer Dabbelt Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Samuel Holland , stable@kernel.org Subject: [PATCH -fixes 1/2] riscv: Fix enabling cbo.zero when running in M-mode Date: Sun, 11 Feb 2024 18:26:14 -0800 Message-ID: <20240212022642.1968739-1-samuel.holland@sifive.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790658442683949834 X-GMAIL-MSGID: 1790658442683949834 When the kernel is running in M-mode, the CBZE bit must be set in the menvcfg CSR, not in senvcfg. Cc: stable@kernel.org Fixes: 43c16d51a19b ("RISC-V: Enable cbo.zero in usermode") Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones --- arch/riscv/include/asm/csr.h | 2 ++ arch/riscv/kernel/cpufeature.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 510014051f5d..2468c55933cd 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -424,6 +424,7 @@ # define CSR_STATUS CSR_MSTATUS # define CSR_IE CSR_MIE # define CSR_TVEC CSR_MTVEC +# define CSR_ENVCFG CSR_MENVCFG # define CSR_SCRATCH CSR_MSCRATCH # define CSR_EPC CSR_MEPC # define CSR_CAUSE CSR_MCAUSE @@ -448,6 +449,7 @@ # define CSR_STATUS CSR_SSTATUS # define CSR_IE CSR_SIE # define CSR_TVEC CSR_STVEC +# define CSR_ENVCFG CSR_SENVCFG # define CSR_SCRATCH CSR_SSCRATCH # define CSR_EPC CSR_SEPC # define CSR_CAUSE CSR_SCAUSE diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 89920f84d0a3..c5b13f7dd482 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -950,7 +950,7 @@ arch_initcall(check_unaligned_access_all_cpus); void riscv_user_isa_enable(void) { if (riscv_cpu_has_extension_unlikely(smp_processor_id(), RISCV_ISA_EXT_ZICBOZ)) - csr_set(CSR_SENVCFG, ENVCFG_CBZE); + csr_set(CSR_ENVCFG, ENVCFG_CBZE); } #ifdef CONFIG_RISCV_ALTERNATIVE