Re: [Qemu-devel] [PATCH v2 0/3] target/riscv: use tcg_lookup_and_goto_ptr

["Emilio G. Cota" <cota@braap.org>]

On Tue, Sep 04, 2018 at 16:42:32 -0700, Alistair Francis wrote:
> On Tue, Sep 4, 2018 at 4:39 PM, Emilio G. Cota <cota@braap.org> wrote:
> > On Tue, Sep 04, 2018 at 13:18:28 -0700, Alistair Francis wrote:
> >> On Fri, Aug 31, 2018 at 3:22 PM, Emilio G. Cota <cota@braap.org> wrote:
> >> > On Fri, Aug 10, 2018 at 13:39:38 -0400, Emilio G. Cota wrote:
> >> >> Changes wrt v1: changed patch 3 as suggested by Richard. Also
> >> >> added his R-b's.
> >> >>
> >> >> You can fetch this series from:
> >> >>   https://github.com/cota/qemu/tree/riscv-lookup_ptr-v2
> >> >
> >> > RISC-V maintainers: any plans of picking this up for 3.1?
> >>
> >> Thanks for CCing me.
> >>
> >> I think Michael must be really busy, I haven't seen any activity for
> >> awhile. I'm going to send a PR with everything that has been reviewed
> >> and applies cleanly.
> >
> > Thanks!
> >
> > Did patch 1 not apply cleanly? I see it's not part of the pullreq
> > you just sent.
> >
> > I'd like the three patches to go in in the original order, since
> > the perf numbers in patch 3's commit log are laid out assuming
> > that is the case.
> 
> The content of patch 1 was applied in this commit:
> 
> commit 07ea28b41830f946de3841b0ac61a3413679feb9
> Author: Richard Henderson <richard.henderson@linaro.org>
> Date:   Wed May 30 18:06:23 2018 -0700
> 
>     tcg: Pass tb and index to tcg_gen_exit_tb separately
> 
>     Do the cast to uintptr_t within the helper, so that the compiler
>     can type check the pointer argument.  We can also do some more
>     sanity checking of the index argument.
> 
>     Reviewed-by: Laurent Vivier <laurent@vivier.eu>
>     Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> 
> https://github.com/qemu/qemu/commit/07ea28b41830f946de3841b0ac61a3413679feb9
> 
> so unfortunately the patch no longer applies.

If I rebase the 3 patches on top of the current master (19b599f7),
the 3 patches apply cleanly, including patch 1:

--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -135,7 +135,7 @@ static void gen_goto_tb(DisasContext *ctx, int n, targ
         if (ctx->base.singlestep_enabled) {
             gen_exception_debug();
         } else {
-            tcg_gen_exit_tb(NULL, 0);
+            tcg_gen_lookup_and_goto_ptr();
         }
     }
 }

Did you apply the patches manually or pull from a branch?
The latest branch I have on this is:
   https://github.com/cota/qemu/tree/riscv-lookup_ptr-v2
(although note that that branch doesn't have Richard's
R-b tag for patch 3)

Thanks,

		Emilio