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Re: [PATCH v2] linux-user/riscv: Add Zicboz extensions to hwprobe
From: |
Andrew Jones |
Subject: |
Re: [PATCH v2] linux-user/riscv: Add Zicboz extensions to hwprobe |
Date: |
Fri, 24 Nov 2023 17:59:05 +0100 |
On Thu, Nov 23, 2023 at 07:12:59PM +0100, Christoph Muellner wrote:
> From: Christoph Müllner <christoph.muellner@vrull.eu>
>
> Upstream Linux recently added RISC-V Zicboz support to the hwprobe API.
> This patch introduces this for QEMU's user space emulator.
>
> Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
> ---
> linux-user/syscall.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/linux-user/syscall.c b/linux-user/syscall.c
> index 65ac3ac796..2f9a1c5279 100644
> --- a/linux-user/syscall.c
> +++ b/linux-user/syscall.c
> @@ -8799,6 +8799,7 @@ static int do_getdents64(abi_long dirfd, abi_long arg2,
> abi_long count)
> #define RISCV_HWPROBE_EXT_ZBA (1 << 3)
> #define RISCV_HWPROBE_EXT_ZBB (1 << 4)
> #define RISCV_HWPROBE_EXT_ZBS (1 << 5)
> +#define RISCV_HWPROBE_EXT_ZICBOZ (1 << 6)
>
> #define RISCV_HWPROBE_KEY_CPUPERF_0 5
> #define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
> @@ -8855,6 +8856,8 @@ static void risc_hwprobe_fill_pairs(CPURISCVState *env,
> RISCV_HWPROBE_EXT_ZBB : 0;
> value |= cfg->ext_zbs ?
> RISCV_HWPROBE_EXT_ZBS : 0;
> + value |= cfg->ext_zicboz ?
> + RISCV_HWPROBE_EXT_ZICBOZ : 0;
> __put_user(value, &pair->value);
> break;
> case RISCV_HWPROBE_KEY_CPUPERF_0:
> --
> 2.41.0
>
>
We should also add support for getting the block size with
RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE.
Thanks,
drew