From: Paolo Bonzini <pbonzini@redhat.com>
To: Pavel Dovgaluk <Pavel.Dovgaluk@ispras.ru>,
'Peter Maydell' <peter.maydell@linaro.org>,
'QEMU Developers' <qemu-devel@nongnu.org>
Cc: 'Richard Henderson' <rth@twiddle.net>
Subject: Re: [Qemu-devel] when does a target frontend need to use gen_io_start()/gen_io_end() ?
Date: Wed, 13 May 2015 10:32:36 +0200 [thread overview]
Message-ID: <55530C24.70207@redhat.com> (raw)
In-Reply-To: <16201.3286528692$1431500273@news.gmane.org>
On 13/05/2015 08:57, Pavel Dovgaluk wrote:
>> > It's any instruction that can cause an icount read, typically through
>> > QEMU_CLOCK_VIRTUAL or cpu_get_ticks().
> Doesn't this mean that ARM has incorrect implementation of icount?
> MMIO is common for this platform, but none of memory accesses are
> surrounded with gen_io_start()/gen_io_end().
See here:
if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu_can_do_io(cpu)) {
cpu_io_recompile(cpu, retaddr);
}
in softmmu_template.h.
Paolo
prev parent reply other threads:[~2015-05-13 8:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-12 15:32 [Qemu-devel] when does a target frontend need to use gen_io_start()/gen_io_end() ? Peter Maydell
2015-05-12 15:43 ` Richard Henderson
2015-05-12 15:54 ` Peter Maydell
2015-05-12 18:17 ` Paolo Bonzini
2015-05-12 19:41 ` Peter Maydell
2015-05-13 8:42 ` Paolo Bonzini
2015-05-13 9:41 ` Peter Maydell
2015-05-13 10:03 ` Paolo Bonzini
2015-05-13 12:30 ` Frederic Konrad
2015-05-13 6:57 ` Pavel Dovgaluk
[not found] ` <16201.3286528692$1431500273@news.gmane.org>
2015-05-13 8:32 ` Paolo Bonzini [this message]
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