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[59.124.168.89]) by smtp.gmail.com with ESMTPSA id cv1sm1940511pjb.48.2021.11.09.01.48.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Nov 2021 01:48:44 -0800 (PST) From: Greentime Hu To: palmer@dabbelt.com, paul.walmsley@sifive.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, aou@eecs.berkeley.edu Subject: [PATCH v9 08/17] riscv: Add vector struct and assembler definitions Date: Tue, 9 Nov 2021 17:48:20 +0800 Message-Id: <15d09938180ee45bc5481c4a2d41ad656ca23c82.1636362169.git.greentime.hu@sifive.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add vector state context struct in struct thread and asm-offsets.c definitions. The vector registers will be saved in datap pointer of __riscv_v_state. It will be dynamically allocated in kernel space. It will be put right after the __riscv_v_state data structure in user space. Co-developed-by: Vincent Chen Signed-off-by: Vincent Chen Signed-off-by: Greentime Hu --- arch/riscv/include/asm/processor.h | 1 + arch/riscv/include/uapi/asm/ptrace.h | 11 +++++++++++ arch/riscv/kernel/asm-offsets.c | 6 ++++++ 3 files changed, 18 insertions(+) diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 46b492c78cbb..a268f1382e52 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -35,6 +35,7 @@ struct thread_struct { unsigned long s[12]; /* s[0]: frame pointer */ struct __riscv_d_ext_state fstate; unsigned long bad_cause; + struct __riscv_v_state vstate; }; /* Whitelist the fstate from the task_struct for hardened usercopy */ diff --git a/arch/riscv/include/uapi/asm/ptrace.h b/arch/riscv/include/uapi/asm/ptrace.h index 882547f6bd5c..bd3b8a710246 100644 --- a/arch/riscv/include/uapi/asm/ptrace.h +++ b/arch/riscv/include/uapi/asm/ptrace.h @@ -77,6 +77,17 @@ union __riscv_fp_state { struct __riscv_q_ext_state q; }; +struct __riscv_v_state { + unsigned long vstart; + unsigned long vl; + unsigned long vtype; + unsigned long vcsr; + void *datap; +#if __riscv_xlen == 32 + __u32 __padding; +#endif +}; + #endif /* __ASSEMBLY__ */ #endif /* _UAPI_ASM_RISCV_PTRACE_H */ diff --git a/arch/riscv/kernel/asm-offsets.c b/arch/riscv/kernel/asm-offsets.c index 90f8ce64fa6f..34f43c84723a 100644 --- a/arch/riscv/kernel/asm-offsets.c +++ b/arch/riscv/kernel/asm-offsets.c @@ -72,6 +72,12 @@ void asm_offsets(void) OFFSET(TSK_STACK_CANARY, task_struct, stack_canary); #endif + OFFSET(RISCV_V_STATE_VSTART, __riscv_v_state, vstart); + OFFSET(RISCV_V_STATE_VL, __riscv_v_state, vl); + OFFSET(RISCV_V_STATE_VTYPE, __riscv_v_state, vtype); + OFFSET(RISCV_V_STATE_VCSR, __riscv_v_state, vcsr); + OFFSET(RISCV_V_STATE_DATAP, __riscv_v_state, datap); + DEFINE(PT_SIZE, sizeof(struct pt_regs)); OFFSET(PT_EPC, pt_regs, epc); OFFSET(PT_RA, pt_regs, ra); -- 2.31.1