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Re: [Qemu-devel] [PATCH 05/35] tcg-s390: Icache flush is a no-op.
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [PATCH 05/35] tcg-s390: Icache flush is a no-op. |
Date: |
Thu, 10 Jun 2010 00:55:09 +0200 |
User-agent: |
Mutt/1.5.20 (2009-06-14) |
On Fri, Jun 04, 2010 at 12:14:13PM -0700, Richard Henderson wrote:
> Before gcc 4.2, __builtin___clear_cache doesn't exist, and
> afterward the gcc s390 backend implements it as nothing.
Does it means that instruction and data caches are coherent on s390?
> Signed-off-by: Richard Henderson <address@hidden>
> ---
> tcg/s390/tcg-target.h | 5 -----
> 1 files changed, 0 insertions(+), 5 deletions(-)
>
> diff --git a/tcg/s390/tcg-target.h b/tcg/s390/tcg-target.h
> index d8a2955..d7fe0c7 100644
> --- a/tcg/s390/tcg-target.h
> +++ b/tcg/s390/tcg-target.h
> @@ -94,9 +94,4 @@ enum {
>
> static inline void flush_icache_range(unsigned long start, unsigned long
> stop)
> {
> -#if QEMU_GNUC_PREREQ(4, 1)
> - __builtin___clear_cache((char *) start, (char *) stop);
> -#else
> -#error not implemented
> -#endif
> }
> --
> 1.7.0.1
>
>
>
--
Aurelien Jarno GPG: 1024D/F1BCDB73
address@hidden http://www.aurel32.net
[Qemu-devel] [PATCH 07/35] tcg: Optionally sign-extend 32-bit arguments for 64-bit host., Richard Henderson, 2010/06/04