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From: "Rémi Denis-Courmont" <remi@remlab.net>
To: palmer@dabbelt.com, linux-riscv@lists.infradead.org
Cc: andy.chiu@sifive.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -next v20 20/26] riscv: Add prctl controls for userspace vector management
Date: Wed, 24 May 2023 19:16:03 +0300	[thread overview]
Message-ID: <3656227.v5FYL8H6MN@basile.remlab.net> (raw)
In-Reply-To: <20230524092530.7773-1-andy.chiu@sifive.com>

Le keskiviikkona 24. toukokuuta 2023, 12.25.30 EEST Andy Chiu a écrit :
> How about adding the following 2 patches to deal with the problem.
> However, I am concerned if this makes ELF_HWCAP too complicated. e.g.
> Future extensions may as well want to do something here after we create
> an entry here.

Fine with me but I feel that we are missing the bigger picture here, as to 
what the usage pattern/guideline for the prctl() on userspace side should be?

Maybe it was already discussed, and I just missed it, but I couldn't find it in 
the documentation.

-- 
Rémi Denis-Courmont
http://www.remlab.net/




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WARNING: multiple messages have this Message-ID (diff)
From: "Rémi Denis-Courmont" <remi@remlab.net>
To: palmer@dabbelt.com, linux-riscv@lists.infradead.org
Cc: andy.chiu@sifive.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -next v20 20/26] riscv: Add prctl controls for userspace vector management
Date: Wed, 24 May 2023 19:16:03 +0300	[thread overview]
Message-ID: <3656227.v5FYL8H6MN@basile.remlab.net> (raw)
In-Reply-To: <20230524092530.7773-1-andy.chiu@sifive.com>

Le keskiviikkona 24. toukokuuta 2023, 12.25.30 EEST Andy Chiu a écrit :
> How about adding the following 2 patches to deal with the problem.
> However, I am concerned if this makes ELF_HWCAP too complicated. e.g.
> Future extensions may as well want to do something here after we create
> an entry here.

Fine with me but I feel that we are missing the bigger picture here, as to 
what the usage pattern/guideline for the prctl() on userspace side should be?

Maybe it was already discussed, and I just missed it, but I couldn't find it in 
the documentation.

-- 
Rémi Denis-Courmont
http://www.remlab.net/




  reply	other threads:[~2023-05-24 16:16 UTC|newest]

Thread overview: 166+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-18 16:19 [PATCH -next v20 00/26] riscv: Add vector ISA support Andy Chiu
2023-05-18 16:19 ` Andy Chiu
2023-05-18 16:19 ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 01/26] riscv: Rename __switch_to_aux() -> fpu Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 02/26] riscv: Extending cpufeature.c to detect V-extension Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 03/26] riscv: hwprobe: Add support for probing V in RISCV_HWPROBE_KEY_IMA_EXT_0 Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 17:28   ` Conor Dooley
2023-05-18 17:28     ` Conor Dooley
2023-05-18 17:28     ` Conor Dooley
2023-05-19 16:50   ` Evan Green
2023-05-19 16:50     ` Evan Green
2023-05-19 16:50     ` Evan Green
2023-05-24  0:48   ` Palmer Dabbelt
2023-05-24  0:48     ` Palmer Dabbelt
2023-05-24  0:48     ` Palmer Dabbelt
2023-06-01  4:46   ` Guo Ren
2023-06-01  4:46     ` Guo Ren
2023-06-01  4:46     ` Guo Ren
2023-05-18 16:19 ` [PATCH -next v20 04/26] riscv: Add new csr defines related to vector extension Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 05/26] riscv: Clear vector regfile on bootup Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 06/26] riscv: Disable Vector Instructions for kernel itself Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 07/26] riscv: Introduce Vector enable/disable helpers Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 08/26] riscv: Introduce riscv_v_vsize to record size of Vector context Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 09/26] riscv: Introduce struct/helpers to save/restore per-task Vector state Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-24  0:49   ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-18 16:19 ` [PATCH -next v20 10/26] riscv: Add task switch support for vector Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-24  0:49   ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-30 10:11     ` Andy Chiu
2023-05-30 10:11       ` Andy Chiu
2023-05-30 10:11       ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 11/26] riscv: Allocate user's vector context in the first-use trap Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 17:47   ` Conor Dooley
2023-05-18 17:47     ` Conor Dooley
2023-05-18 17:47     ` Conor Dooley
2023-05-22  9:40     ` Andy Chiu
2023-05-22  9:40       ` Andy Chiu
2023-05-22  9:40       ` Andy Chiu
2023-05-24  0:49   ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24 14:21     ` Darius Rad
2023-05-24 14:21       ` Darius Rad
2023-05-24 14:21       ` Darius Rad
2023-05-30 16:51   ` Guo Ren
2023-05-30 16:51     ` Guo Ren
2023-05-30 16:51     ` Guo Ren
2023-05-18 16:19 ` [PATCH -next v20 12/26] riscv: Add ptrace vector support Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-24  0:49   ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24  0:49     ` Palmer Dabbelt
2023-05-24  6:32     ` Arnd Bergmann
2023-05-24  6:32       ` Arnd Bergmann
2023-05-24  6:32       ` Arnd Bergmann
2023-05-24  7:50       ` Andreas Schwab
2023-05-24  7:50         ` Andreas Schwab
2023-05-24  7:50         ` Andreas Schwab
2023-05-18 16:19 ` [PATCH -next v20 13/26] riscv: signal: check fp-reserved words unconditionally Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 14/26] riscv: signal: Add sigcontext save/restore for vector Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 15/26] riscv: signal: Report signal frame size to userspace via auxv Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 16/26] riscv: signal: validate altstack to reflect Vector Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 17/26] riscv: prevent stack corruption by reserving task_pt_regs(p) early Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 18/26] riscv: kvm: Add V extension to KVM ISA Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 19/26] riscv: KVM: Add vector lazy save/restore support Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 20/26] riscv: Add prctl controls for userspace vector management Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-20 14:11   ` kernel test robot
2023-05-20 14:11     ` kernel test robot
2023-05-20 14:11     ` kernel test robot
2023-05-21  1:50   ` kernel test robot
2023-05-21  1:50     ` kernel test robot
2023-05-21  1:50     ` kernel test robot
2023-05-22  4:12     ` Andy Chiu
2023-05-22  4:12       ` Andy Chiu
2023-05-21  5:38   ` Rémi Denis-Courmont
2023-05-21  5:38     ` Rémi Denis-Courmont
2023-05-22  8:28     ` Andy Chiu
2023-05-22  8:28       ` Andy Chiu
2023-05-22  9:58       ` Rémi Denis-Courmont
2023-05-24  0:18         ` Palmer Dabbelt
2023-05-24  0:18           ` Palmer Dabbelt
2023-05-24  9:25           ` Andy Chiu
2023-05-24  9:25             ` Andy Chiu
2023-05-24 16:16             ` Rémi Denis-Courmont [this message]
2023-05-24 16:16               ` Rémi Denis-Courmont
2023-05-30 14:14               ` Andy Chiu
2023-05-30 14:14                 ` Andy Chiu
2023-05-24 16:13           ` Rémi Denis-Courmont
2023-05-24 16:13             ` Rémi Denis-Courmont
2023-05-23 13:56   ` Björn Töpel
2023-05-23 13:56     ` Björn Töpel
2023-05-23 13:56     ` Björn Töpel
2023-05-18 16:19 ` [PATCH -next v20 21/26] riscv: Add sysctl to set the default vector rule for new processes Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-23 13:45   ` Björn Töpel
2023-05-23 13:45     ` Björn Töpel
2023-05-23 13:45     ` Björn Töpel
2023-05-18 16:19 ` [PATCH -next v20 22/26] riscv: detect assembler support for .option arch Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 23/26] riscv: Enable Vector code to be built Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 17:31   ` Conor Dooley
2023-05-18 17:31     ` Conor Dooley
2023-05-18 17:31     ` Conor Dooley
2023-05-24  0:22     ` Palmer Dabbelt
2023-05-24  0:22       ` Palmer Dabbelt
2023-05-24  0:22       ` Palmer Dabbelt
2023-05-18 16:19 ` [PATCH -next v20 24/26] riscv: Add documentation for Vector Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-19  8:09   ` Bagas Sanjaya
2023-05-19  8:09     ` Bagas Sanjaya
2023-05-19  8:09     ` Bagas Sanjaya
2023-05-21  5:20   ` Rémi Denis-Courmont
2023-05-21  5:20     ` Rémi Denis-Courmont
2023-05-18 16:19 ` [PATCH -next v20 25/26] selftests: Test RISC-V Vector prctl interface Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19 ` [PATCH -next v20 26/26] selftests: add .gitignore file for RISC-V hwprobe Andy Chiu
2023-05-18 16:19   ` Andy Chiu
2023-05-18 16:19   ` Andy Chiu

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