Re: [PATCH v2] linux-user/riscv: Add Zicboz extensions to hwprobe

[Andrew Jones <ajones@ventanamicro.com>]

On Fri, Nov 24, 2023 at 06:41:25PM +0100, Christoph Müllner wrote:
> On Fri, Nov 24, 2023 at 5:59 PM Andrew Jones <ajones@ventanamicro.com> wrote:
> >
> > 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.
> 
> Hi Andrew, this is already upstream, just the EXT_ZICBOZ is missing:

Oh, thanks. In that case,

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>

drew