From: Samuel Holland <samuel.holland@sifive.com> To: Palmer Dabbelt <palmer@dabbelt.com> Cc: Andrew Jones <ajones@ventanamicro.com>, linux-kernel@vger.kernel.org, Conor Dooley <conor@kernel.org>, linux-riscv@lists.infradead.org, Stefan O'Rear <sorear@fastmail.com>, Samuel Holland <samuel.holland@sifive.com>, stable@vger.kernel.org Subject: [PATCH -fixes v3 1/2] riscv: Fix enabling cbo.zero when running in M-mode Date: Wed, 14 Feb 2024 01:01:56 -0800 [thread overview] Message-ID: <20240214090206.195754-2-samuel.holland@sifive.com> (raw) In-Reply-To: <20240214090206.195754-1-samuel.holland@sifive.com> When the kernel is running in M-mode, the CBZE bit must be set in the menvcfg CSR, not in senvcfg. Cc: <stable@vger.kernel.org> Fixes: 43c16d51a19b ("RISC-V: Enable cbo.zero in usermode") Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Samuel Holland <samuel.holland@sifive.com> --- (no changes since v1) 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 -- 2.43.0
WARNING: multiple messages have this Message-ID (diff)
From: Samuel Holland <samuel.holland@sifive.com> To: Palmer Dabbelt <palmer@dabbelt.com> Cc: Andrew Jones <ajones@ventanamicro.com>, linux-kernel@vger.kernel.org, Conor Dooley <conor@kernel.org>, linux-riscv@lists.infradead.org, Stefan O'Rear <sorear@fastmail.com>, Samuel Holland <samuel.holland@sifive.com>, stable@vger.kernel.org Subject: [PATCH -fixes v3 1/2] riscv: Fix enabling cbo.zero when running in M-mode Date: Wed, 14 Feb 2024 01:01:56 -0800 [thread overview] Message-ID: <20240214090206.195754-2-samuel.holland@sifive.com> (raw) In-Reply-To: <20240214090206.195754-1-samuel.holland@sifive.com> When the kernel is running in M-mode, the CBZE bit must be set in the menvcfg CSR, not in senvcfg. Cc: <stable@vger.kernel.org> Fixes: 43c16d51a19b ("RISC-V: Enable cbo.zero in usermode") Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Signed-off-by: Samuel Holland <samuel.holland@sifive.com> --- (no changes since v1) 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 -- 2.43.0 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2024-02-14 9:02 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-02-14 9:01 [PATCH -fixes v3 0/2] riscv: cbo.zero fixes Samuel Holland 2024-02-14 9:01 ` Samuel Holland 2024-02-14 9:01 ` Samuel Holland [this message] 2024-02-14 9:01 ` [PATCH -fixes v3 1/2] riscv: Fix enabling cbo.zero when running in M-mode Samuel Holland 2024-02-14 9:28 ` Andrew Jones 2024-02-14 9:28 ` Andrew Jones 2024-02-27 19:48 ` Alexandre Ghiti 2024-02-27 19:48 ` Alexandre Ghiti 2024-02-27 20:01 ` Samuel Holland 2024-02-27 20:01 ` Samuel Holland 2024-02-14 9:01 ` [PATCH -fixes v3 2/2] riscv: Save/restore envcfg CSR during CPU suspend Samuel Holland 2024-02-14 9:01 ` Samuel Holland 2024-02-14 9:29 ` Andrew Jones 2024-02-14 9:29 ` Andrew Jones
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