From: Peter Maydell <peter.maydell@linaro.org>
To: Tom Yan <tom.ty89@gmail.com>
Cc: "Daniel P . Berrangé" <berrange@redhat.com>,
Qemu-block <qemu-block@nongnu.org>,
"Bin Meng" <bin.meng@windriver.com>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Alexander Bulekov" <alxndr@bu.edu>,
"Niek Linnenbank" <nieklinnenbank@gmail.com>,
"Michal Suchánek" <msuchanek@suse.de>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Warner Losh" <imp@bsdimp.com>
Subject: Re: [RFC PATCH 9/9] hw/sd: Allow card size not power of 2 again
Date: Thu, 24 Jun 2021 11:56:51 +0100 [thread overview]
Message-ID: <CAFEAcA-x-ZWKM0wEHm0-iqLydtyuFCm2ba+j6RGNwLyB0UEtTw@mail.gmail.com> (raw)
In-Reply-To: <CAGnHSE=CoXHKXeM+-PTv-EADcxisuqU3f91W1mCC0GTZO3UOuw@mail.gmail.com>
On Thu, 24 Jun 2021 at 11:27, Tom Yan <tom.ty89@gmail.com> wrote:
> I really think we should get (/ have gotten) things clear first. What
> exactly is the bug we have been talking about here? I mean like, where
> does it occur and what's the nature of it.
>
> 1. Is it specific to a certain type / model of backend / physical
> storage device that will be made use of by qemu for the emulated
> storage? (I presume not since you mention about image, unless you
> irrationally related/bound the emulated storage type and the physical
> storage type together.)
>
> 2. Does it have anything to do with a certain flaw in qemu itself?
> Like the code that does read/write operation is flawed that it cannot
> be handled by a certain *proper* backend device?
>
> 3. Or is it actually a bug in a certain driver / firmware blob that
> will be used by an *emulated* device in the guest? In that case, can
> we emulate another model so that it won't be using the problematic
> driver / firmware?
Definitely agreed -- before we start changing QEMU code we need
to identify clearly (a) what the real hardware does and (b) what
the situation was we were originally trying to fix.
thanks
-- PMM
next prev parent reply other threads:[~2021-06-24 11:14 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 18:00 [RFC PATCH 0/9] hw/sd: Allow card size not power of 2 again Philippe Mathieu-Daudé
2021-06-23 18:00 ` [PATCH 1/9] hw/sd: When card is in wrong state, log which state it is Philippe Mathieu-Daudé
2021-08-05 19:37 ` Eric Blake
2021-06-23 18:00 ` [PATCH 2/9] hw/sd: Extract address_in_range() helper, log invalid accesses Philippe Mathieu-Daudé
2021-08-05 19:46 ` Eric Blake
2021-06-23 18:00 ` [PATCH 3/9] tests/acceptance: Tag NetBSD tests as 'os:netbsd' Philippe Mathieu-Daudé
2021-07-03 8:41 ` Philippe Mathieu-Daudé
2021-07-03 8:43 ` Philippe Mathieu-Daudé
2021-07-04 12:35 ` Niek Linnenbank
2021-07-05 8:55 ` Philippe Mathieu-Daudé
2021-07-11 21:05 ` Philippe Mathieu-Daudé
2021-07-05 15:25 ` Willian Rampazzo
2021-07-13 16:57 ` Cleber Rosa
2021-06-23 18:00 ` [PATCH 4/9] tests/acceptance: Extract image_expand() helper Philippe Mathieu-Daudé
2021-07-05 15:27 ` Willian Rampazzo
2021-07-13 17:02 ` Cleber Rosa
2021-06-23 18:00 ` [PATCH 5/9] tests/acceptance: Use image_expand() in test_arm_orangepi_uboot_netbsd9 Philippe Mathieu-Daudé
2021-07-05 15:28 ` Willian Rampazzo
2021-08-04 20:54 ` Philippe Mathieu-Daudé
2021-08-05 17:06 ` Niek Linnenbank
2021-06-23 18:00 ` [RFC PATCH 6/9] tests/acceptance: Use image_expand() in test_arm_orangepi_bionic_20_08 Philippe Mathieu-Daudé
2021-07-05 15:30 ` Willian Rampazzo
2021-08-05 17:11 ` Niek Linnenbank
2021-06-23 18:00 ` [RFC PATCH 7/9] tests/acceptance: Do not expand SD card image in test_arm_orangepi_sd Philippe Mathieu-Daudé
2021-06-23 18:00 ` [PATCH 8/9] tests/acceptance: Remove now unused pow2ceil() Philippe Mathieu-Daudé
2021-07-05 15:32 ` Willian Rampazzo
2021-06-23 18:00 ` [RFC PATCH 9/9] hw/sd: Allow card size not power of 2 again Philippe Mathieu-Daudé
2021-06-24 10:17 ` Daniel P. Berrangé
2021-06-24 10:24 ` Tom Yan
2021-06-24 10:56 ` Peter Maydell [this message]
2021-06-24 16:08 ` Warner Losh
2021-06-24 2:50 ` [RFC PATCH 0/9] " Alexander Bulekov
2021-06-24 8:12 ` Philippe Mathieu-Daudé
2021-06-26 4:04 ` Alexander Bulekov
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