Re: [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions

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Re: [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions

From:	Richard Henderson
Subject:	Re: [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions
Date:	Thu, 8 Sep 2022 08:29:57 +0100
User-agent:	Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0

On 9/6/22 13:22, Christoph Muellner wrote:

+NOP_PRIVCHECK(th_sfence_vmas, REQUIRE_PRIV_MHS)
+NOP_PRIVCHECK(th_sync, REQUIRE_PRIV_MHSU)
+NOP_PRIVCHECK(th_sync_i, REQUIRE_PRIV_MHSU)
+NOP_PRIVCHECK(th_sync_is, REQUIRE_PRIV_MHSU)
+NOP_PRIVCHECK(th_sync_s, REQUIRE_PRIV_MHSU)

These should not be nops: th_sfence_vmas requires a tlb flush; th.sync{,.i} needs to endthe current translation block; th.sync.{s,is} needs multiprocessor sync, which involves acall to async_safe_run_on_cpu.

r~

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[PATCH 00/11] Add support for the T-Head vendor extensions, Christoph Muellner, 2022/09/06
- [PATCH 01/11] riscv: Add privilege level to DisasContext, Christoph Muellner, 2022/09/06
  - Re: [PATCH 01/11] riscv: Add privilege level to DisasContext, LIU Zhiwei, 2022/09/15
  - Re: [PATCH 01/11] riscv: Add privilege level to DisasContext, Richard Henderson, 2022/09/16
    - Re: [PATCH 01/11] riscv: Add privilege level to DisasContext, Richard Henderson, 2022/09/16
    - Re: [PATCH 01/11] riscv: Add privilege level to DisasContext, LIU Zhiwei, 2022/09/16
- [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions, Christoph Muellner, 2022/09/06
  - Re: [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions, Richard Henderson <=
    - Re: [PATCH 03/11] RISC-V: Adding T-Head SYNC instructions, Christoph Müllner, 2022/09/09
- [PATCH 04/11] RISC-V: Adding T-Head Bitmanip instructions, Christoph Muellner, 2022/09/06
  - Re: [PATCH 04/11] RISC-V: Adding T-Head Bitmanip instructions, LIU Zhiwei, 2022/09/16
- [PATCH 02/11] RISC-V: Adding T-Head CMO instructions, Christoph Muellner, 2022/09/06
  - Re: [PATCH 02/11] RISC-V: Adding T-Head CMO instructions, LIU Zhiwei, 2022/09/15
  - Re: [PATCH 02/11] RISC-V: Adding T-Head CMO instructions, LIU Zhiwei, 2022/09/16
    - Re: [PATCH 02/11] RISC-V: Adding T-Head CMO instructions, Richard Henderson, 2022/09/16
- [PATCH 06/11] RISC-V: Adding T-Head multiply-accumulate instructions, Christoph Muellner, 2022/09/06
- [PATCH 05/11] RISC-V: Adding T-Head CondMov instructions, Christoph Muellner, 2022/09/06
- [PATCH 07/11] RISC-V: Adding T-Head XMAE support, Christoph Muellner, 2022/09/06

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