From: "Björn Töpel" <bjorn@kernel.org>
To: Andy Chiu <andy.chiu@sifive.com>,
linux-riscv@lists.infradead.org, palmer@dabbelt.com,
anup@brainfault.org, atishp@atishpatra.org,
kvm-riscv@lists.infradead.org, kvm@vger.kernel.org
Cc: vineetg@rivosinc.com, greentime.hu@sifive.com,
guoren@linux.alibaba.com, "Andy Chiu" <andy.chiu@sifive.com>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Andrew Jones" <ajones@ventanamicro.com>,
"Heiko Stuebner" <heiko.stuebner@vrull.eu>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
"Liao Chang" <liaochang1@huawei.com>,
"Jisheng Zhang" <jszhang@kernel.org>,
"Vincent Chen" <vincent.chen@sifive.com>,
"Guo Ren" <guoren@kernel.org>, "Björn Töpel" <bjorn@rivosinc.com>,
"Xianting Tian" <xianting.tian@linux.alibaba.com>,
"Mattias Nissler" <mnissler@rivosinc.com>,
"Richard Henderson" <richard.henderson@linaro.org>
Subject: Re: [PATCH -next v15 10/19] riscv: Allocate user's vector context in the first-use trap
Date: Thu, 23 Mar 2023 11:29:37 +0100 [thread overview]
Message-ID: <87edpf4v72.fsf@all.your.base.are.belong.to.us> (raw)
In-Reply-To: <20230317113538.10878-11-andy.chiu@sifive.com>
Andy Chiu <andy.chiu@sifive.com> writes:
> Vector unit is disabled by default for all user processes. Thus, a
> process will take a trap (illegal instruction) into kernel at the first
> time when it uses Vector. Only after then, the kernel allocates V
> context and starts take care of the context for that user process.
>
> Suggested-by: Richard Henderson <richard.henderson@linaro.org>
> Link: https://lore.kernel.org/r/3923eeee-e4dc-0911-40bf-84c34aee962d@linaro.org
> Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Björn Töpel <bjorn@rivosinc.com>
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next prev parent reply other threads:[~2023-03-23 10:29 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 11:35 [PATCH -next v15 00/19] riscv: Add vector ISA support Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 01/19] riscv: Rename __switch_to_aux() -> fpu Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 02/19] riscv: Extending cpufeature.c to detect V-extension Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 03/19] riscv: Add new csr defines related to vector extension Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 04/19] riscv: Clear vector regfile on bootup Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 05/19] riscv: Disable Vector Instructions for kernel itself Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 06/19] riscv: Introduce Vector enable/disable helpers Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 07/19] riscv: Introduce riscv_v_vsize to record size of Vector context Andy Chiu
2023-03-20 13:02 ` Conor Dooley
2023-03-17 11:35 ` [PATCH -next v15 08/19] riscv: Introduce struct/helpers to save/restore per-task Vector state Andy Chiu
2023-03-20 13:05 ` Conor Dooley
2023-03-20 14:46 ` Andy Chiu
2023-03-20 14:54 ` Conor Dooley
2023-03-22 1:54 ` Guo Ren
2023-03-23 10:21 ` Björn Töpel
2023-03-17 11:35 ` [PATCH -next v15 09/19] riscv: Add task switch support for vector Andy Chiu
2023-03-20 13:07 ` Conor Dooley
2023-03-23 10:23 ` Björn Töpel
2023-03-17 11:35 ` [PATCH -next v15 10/19] riscv: Allocate user's vector context in the first-use trap Andy Chiu
2023-03-20 13:27 ` Conor Dooley
2023-03-23 10:29 ` Björn Töpel [this message]
2023-03-17 11:35 ` [PATCH -next v15 11/19] riscv: Add ptrace vector support Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 12/19] riscv: signal: check fp-reserved words unconditionally Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 13/19] riscv: signal: Add sigcontext save/restore for vector Andy Chiu
2023-03-20 13:36 ` Conor Dooley
2023-03-23 7:50 ` Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 14/19] riscv: signal: Report signal frame size to userspace via auxv Andy Chiu
2023-03-23 10:36 ` Björn Töpel
2023-03-23 14:39 ` Guo Ren
2023-03-17 11:35 ` [PATCH -next v15 15/19] riscv: signal: validate altstack to reflect Vector Andy Chiu
2023-03-20 13:40 ` Conor Dooley
2023-03-17 11:35 ` [PATCH -next v15 16/19] riscv: prevent stack corruption by reserving task_pt_regs(p) early Andy Chiu
2023-03-17 11:35 ` [PATCH -next v15 17/19] riscv: kvm: Add V extension to KVM ISA Andy Chiu
2023-03-17 11:54 ` Anup Patel
2023-03-17 11:35 ` [PATCH -next v15 18/19] riscv: KVM: Add vector lazy save/restore support Andy Chiu
2023-03-17 12:02 ` Anup Patel
2023-03-17 11:35 ` [PATCH -next v15 19/19] riscv: Enable Vector code to be built Andy Chiu
2023-03-17 15:46 ` Nathan Chancellor
2023-03-20 13:47 ` Conor Dooley
2023-03-23 10:44 ` [PATCH -next v15 00/19] riscv: Add vector ISA support Björn Töpel
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