From: Stefan Hajnoczi <stefanha@gmail.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-trivial@nongnu.org, patches@linaro.org,
qemu-devel@nongnu.org, Yurij Popov <oss@djphoenix.ru>
Subject: Re: [Qemu-trivial] [PATCH] qemu-timer: Don't use RDTSC on 386s and 486s
Date: Mon, 3 Dec 2012 14:00:30 +0100 [thread overview]
Message-ID: <20121203130030.GF6048@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <1353683570-30525-1-git-send-email-peter.maydell@linaro.org>
On Fri, Nov 23, 2012 at 03:12:50PM +0000, Peter Maydell wrote:
> Adjust the conditional which guards the implementation of
> cpu_get_real_ticks() via RDTSC, so that we don't try to use it
> on x86 CPUs which don't implement RDTSC. Instead we will fall
> back to the no-cycle-counter-available default implementation.
>
> Reported-by: Yurij Popov <oss@djphoenix.ru>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> qemu-timer.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/qemu-timer.h b/qemu-timer.h
> index da7e97c..e35f163 100644
> --- a/qemu-timer.h
> +++ b/qemu-timer.h
> @@ -169,7 +169,7 @@ static inline int64_t cpu_get_real_ticks(void)
> return retval;
> }
>
> -#elif defined(__i386__)
> +#elif defined(__i586__)
>
> static inline int64_t cpu_get_real_ticks(void)
> {
> --
> 1.7.9.5
Dropping this due to the issue with gcc __i586__ that has been
discussed.
Stefan
WARNING: multiple messages have this Message-ID (diff)
From: Stefan Hajnoczi <stefanha@gmail.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: qemu-trivial@nongnu.org, patches@linaro.org,
qemu-devel@nongnu.org, Yurij Popov <oss@djphoenix.ru>
Subject: Re: [Qemu-devel] [Qemu-trivial] [PATCH] qemu-timer: Don't use RDTSC on 386s and 486s
Date: Mon, 3 Dec 2012 14:00:30 +0100 [thread overview]
Message-ID: <20121203130030.GF6048@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <1353683570-30525-1-git-send-email-peter.maydell@linaro.org>
On Fri, Nov 23, 2012 at 03:12:50PM +0000, Peter Maydell wrote:
> Adjust the conditional which guards the implementation of
> cpu_get_real_ticks() via RDTSC, so that we don't try to use it
> on x86 CPUs which don't implement RDTSC. Instead we will fall
> back to the no-cycle-counter-available default implementation.
>
> Reported-by: Yurij Popov <oss@djphoenix.ru>
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
> qemu-timer.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/qemu-timer.h b/qemu-timer.h
> index da7e97c..e35f163 100644
> --- a/qemu-timer.h
> +++ b/qemu-timer.h
> @@ -169,7 +169,7 @@ static inline int64_t cpu_get_real_ticks(void)
> return retval;
> }
>
> -#elif defined(__i386__)
> +#elif defined(__i586__)
>
> static inline int64_t cpu_get_real_ticks(void)
> {
> --
> 1.7.9.5
Dropping this due to the issue with gcc __i586__ that has been
discussed.
Stefan
next prev parent reply other threads:[~2012-12-03 13:01 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-23 15:12 [Qemu-trivial] [PATCH] qemu-timer: Don't use RDTSC on 386s and 486s Peter Maydell
2012-11-23 15:12 ` [Qemu-devel] " Peter Maydell
2012-11-23 15:15 ` [Qemu-trivial] " Paolo Bonzini
2012-11-23 15:15 ` [Qemu-devel] " Paolo Bonzini
2012-11-23 15:17 ` [Qemu-trivial] " Peter Maydell
2012-11-23 15:17 ` [Qemu-devel] " Peter Maydell
2012-11-23 15:31 ` [Qemu-trivial] " Jamie Lokier
2012-11-23 15:31 ` Jamie Lokier
2012-11-23 15:38 ` [Qemu-trivial] " Peter Maydell
2012-11-23 15:38 ` Peter Maydell
2012-11-23 16:21 ` [Qemu-trivial] " Jamie Lokier
2012-11-23 16:21 ` Jamie Lokier
2012-11-23 15:37 ` [Qemu-trivial] " Peter Maydell
2012-11-23 15:37 ` [Qemu-devel] " Peter Maydell
2012-11-23 16:19 ` [Qemu-trivial] " Jamie Lokier
2012-11-23 16:19 ` Jamie Lokier
2012-11-24 17:39 ` [Qemu-devel] [PATCH] tcg-i386: Improve cmov detection Richard Henderson
2012-11-24 18:12 ` Peter Maydell
2012-11-26 16:23 ` Richard Henderson
2012-12-10 15:42 ` 陳韋任 (Wei-Ren Chen)
2012-11-25 13:44 ` Aurelien Jarno
2012-12-03 13:00 ` Stefan Hajnoczi [this message]
2012-12-03 13:00 ` [Qemu-devel] [Qemu-trivial] [PATCH] qemu-timer: Don't use RDTSC on 386s and 486s Stefan Hajnoczi
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