From: Heiko Stübner <heiko@sntech.de>
To: kvm-riscv@lists.infradead.org
Subject: [PATCH -next v21 11/27] riscv: Allocate user's vector context in the first-use trap
Date: Thu, 08 Jun 2023 15:58:15 +0200 [thread overview]
Message-ID: <1917725.CQOukoFCf9@diego> (raw)
In-Reply-To: <20230605110724.21391-12-andy.chiu@sifive.com>
Am Montag, 5. Juni 2023, 13:07:08 CEST schrieb Andy Chiu:
> 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 at linaro.org
> Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
WARNING: multiple messages have this Message-ID (diff)
From: "Heiko Stübner" <heiko@sntech.de>
To: 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>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
"Jisheng Zhang" <jszhang@kernel.org>,
"Liao Chang" <liaochang1@huawei.com>,
"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>,
"Andy Chiu" <andy.chiu@sifive.com>
Subject: Re: [PATCH -next v21 11/27] riscv: Allocate user's vector context in the first-use trap
Date: Thu, 08 Jun 2023 15:58:15 +0200 [thread overview]
Message-ID: <1917725.CQOukoFCf9@diego> (raw)
In-Reply-To: <20230605110724.21391-12-andy.chiu@sifive.com>
Am Montag, 5. Juni 2023, 13:07:08 CEST schrieb Andy Chiu:
> 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: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
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WARNING: multiple messages have this Message-ID (diff)
From: "Heiko Stübner" <heiko@sntech.de>
To: 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>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Lad Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com>,
"Jisheng Zhang" <jszhang@kernel.org>,
"Liao Chang" <liaochang1@huawei.com>,
"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>,
"Andy Chiu" <andy.chiu@sifive.com>
Subject: Re: [PATCH -next v21 11/27] riscv: Allocate user's vector context in the first-use trap
Date: Thu, 08 Jun 2023 15:58:15 +0200 [thread overview]
Message-ID: <1917725.CQOukoFCf9@diego> (raw)
In-Reply-To: <20230605110724.21391-12-andy.chiu@sifive.com>
Am Montag, 5. Juni 2023, 13:07:08 CEST schrieb Andy Chiu:
> 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: Heiko Stuebner <heiko.stuebner@vrull.eu>
Tested-by: Heiko Stuebner <heiko.stuebner@vrull.eu>
next prev parent reply other threads:[~2023-06-08 13:58 UTC|newest]
Thread overview: 153+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-05 11:06 [PATCH -next v21 00/27] riscv: Add vector ISA support Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:06 ` [PATCH -next v21 01/27] riscv: Rename __switch_to_aux() -> fpu Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:06 ` [PATCH -next v21 02/27] riscv: Extending cpufeature.c to detect V-extension Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:06 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 03/27] riscv: hwprobe: Add support for probing V in RISCV_HWPROBE_KEY_IMA_EXT_0 Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-08 12:36 ` Heiko Stübner
2023-06-08 12:36 ` Heiko Stübner
2023-06-08 12:36 ` Heiko Stübner
2023-06-28 0:30 ` Stefan O'Rear
2023-06-28 0:30 ` Stefan O'Rear
2023-06-28 0:30 ` Stefan O'Rear
2023-06-28 1:56 ` Palmer Dabbelt
2023-06-28 1:56 ` Palmer Dabbelt
2023-06-28 1:56 ` Palmer Dabbelt
2023-06-28 4:53 ` Stefan O'Rear
2023-06-28 4:53 ` Stefan O'Rear
2023-06-28 4:53 ` Stefan O'Rear
2023-06-05 11:07 ` [PATCH -next v21 04/27] riscv: Add new csr defines related to vector extension Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 05/27] riscv: Clear vector regfile on bootup Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 06/27] riscv: Disable Vector Instructions for kernel itself Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 07/27] riscv: Introduce Vector enable/disable helpers Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 08/27] riscv: Introduce riscv_v_vsize to record size of Vector context Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 09/27] riscv: Introduce struct/helpers to save/restore per-task Vector state Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-12 14:32 ` Rémi Denis-Courmont
2023-06-12 14:32 ` Rémi Denis-Courmont
2023-06-12 14:32 ` Rémi Denis-Courmont
2023-06-13 14:19 ` Andy Chiu
2023-06-13 14:19 ` Andy Chiu
2023-06-13 14:19 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 10/27] riscv: Add task switch support for vector Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 11/27] riscv: Allocate user's vector context in the first-use trap Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 16:04 ` Conor Dooley
2023-06-05 16:04 ` Conor Dooley
2023-06-05 16:04 ` Conor Dooley
2023-06-08 13:58 ` Heiko Stübner [this message]
2023-06-08 13:58 ` Heiko Stübner
2023-06-08 13:58 ` Heiko Stübner
2023-06-05 11:07 ` [PATCH -next v21 12/27] riscv: Add ptrace vector support Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 13/27] riscv: signal: check fp-reserved words unconditionally Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 14/27] riscv: signal: Add sigcontext save/restore for vector Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-10-08 9:19 ` Aurelien Jarno
2023-10-08 9:19 ` Aurelien Jarno
2023-10-08 9:19 ` Aurelien Jarno
2023-10-08 16:23 ` Andy Chiu
2023-10-08 16:23 ` Andy Chiu
2023-10-08 16:23 ` Andy Chiu
2023-10-09 17:08 ` Aurelien Jarno
2023-10-09 17:08 ` Aurelien Jarno
2023-10-09 17:08 ` Aurelien Jarno
2023-06-05 11:07 ` [PATCH -next v21 15/27] riscv: signal: Report signal frame size to userspace via auxv Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 16/27] riscv: signal: validate altstack to reflect Vector Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 17/27] riscv: prevent stack corruption by reserving task_pt_regs(p) early Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 18/27] riscv: kvm: Add V extension to KVM ISA Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 19/27] riscv: KVM: Add vector lazy save/restore support Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 20/27] riscv: hwcap: change ELF_HWCAP to a function Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 16:24 ` Conor Dooley
2023-06-05 16:24 ` Conor Dooley
2023-06-05 16:24 ` Conor Dooley
2023-06-12 14:36 ` Rémi Denis-Courmont
2023-06-12 15:30 ` Conor Dooley
2023-06-05 11:07 ` [PATCH -next v21 21/27] riscv: Add prctl controls for userspace vector management Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 22/27] riscv: Add sysctl to set the default vector rule for new processes Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 23/27] riscv: detect assembler support for .option arch Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 15:48 ` Nathan Chancellor
2023-06-05 15:48 ` Nathan Chancellor
2023-06-05 15:48 ` Nathan Chancellor
2023-06-05 16:25 ` Conor Dooley
2023-06-05 16:25 ` Conor Dooley
2023-06-05 16:25 ` Conor Dooley
2024-01-21 1:13 ` Eric Biggers
2024-01-21 1:13 ` Eric Biggers
2024-01-21 1:13 ` Eric Biggers
2024-01-21 2:55 ` Palmer Dabbelt
2024-01-21 2:55 ` Palmer Dabbelt
2024-01-21 2:55 ` Palmer Dabbelt
2024-01-21 14:32 ` Andy Chiu
2024-01-21 14:32 ` Andy Chiu
2024-01-21 14:32 ` Andy Chiu
2024-01-21 18:10 ` Eric Biggers
2024-01-21 18:10 ` Eric Biggers
2024-01-21 18:10 ` Eric Biggers
2024-01-22 22:29 ` Nathan Chancellor
2024-01-22 22:29 ` Nathan Chancellor
2024-01-22 22:29 ` Nathan Chancellor
2024-01-24 21:58 ` Eric Biggers
2024-01-24 21:58 ` Eric Biggers
2024-01-24 21:58 ` Eric Biggers
2023-06-05 11:07 ` [PATCH -next v21 24/27] riscv: Enable Vector code to be built Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 25/27] riscv: Add documentation for Vector Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-12 14:40 ` Rémi Denis-Courmont
2023-06-05 11:07 ` [PATCH -next v21 26/27] selftests: Test RISC-V Vector prctl interface Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` [PATCH -next v21 27/27] selftests: add .gitignore file for RISC-V hwprobe Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-05 11:07 ` Andy Chiu
2023-06-09 14:00 ` [PATCH -next v21 00/27] riscv: Add vector ISA support Palmer Dabbelt
2023-06-09 14:00 ` Palmer Dabbelt
2023-06-09 14:00 ` Palmer Dabbelt
2023-06-09 14:50 ` patchwork-bot+linux-riscv
2023-06-09 14:50 ` patchwork-bot+linux-riscv
2023-06-09 14:50 ` patchwork-bot+linux-riscv
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