From: Peter Maydell <peter.maydell@linaro.org>
To: "Philippe Mathieu-Daudé" <philmd@redhat.com>
Cc: "Jason Wang" <jasowang@redhat.com>,
"QEMU Developers" <qemu-devel@nongnu.org>,
"Beniamino Galvani" <b.galvani@gmail.com>,
"Niek Linnenbank" <nieklinnenbank@gmail.com>,
qemu-arm <qemu-arm@nongnu.org>,
"Igor Mammedov" <imammedo@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>
Subject: Re: [PATCH v4 00/20] Add Allwinner H3 SoC and Orange Pi PC Machine
Date: Tue, 18 Feb 2020 10:05:01 +0000 [thread overview]
Message-ID: <CAFEAcA-kNNWgLc8NxWgVJQk29BVr28j-A_d4M+8=7nfpTzhzcQ@mail.gmail.com> (raw)
In-Reply-To: <3aa04b23-80a8-21d1-7481-d52b6d8f88c1@redhat.com>
On Tue, 18 Feb 2020 at 06:46, Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> IIRC from the specs, cards are block devices and the only alignment
> required is the size of a block (512KiB for your 4GiB card).
Isn't there something related to erase blocks too, which impose
a larger granularity than just a single block?
Anyway, in general the backing image for an SD card device
needs to be exactly the size of the SD card you're emulating,
because QEMU needs somewhere it can write back the data
if the guest decides to write to the last block on the card.
So short-length images generally don't work (true for all
block devices, not just SD cards, I think). This often bites users
if they're using some distro "here's a disk/sd card image file"
where the expected use with real hardware is "dd the image
file onto the SD card".
thanks
-- PMM
next prev parent reply other threads:[~2020-02-18 10:06 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-19 0:50 [PATCH v4 00/20] Add Allwinner H3 SoC and Orange Pi PC Machine Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 01/20] hw/arm: add Allwinner H3 System-on-Chip Niek Linnenbank
2020-01-19 18:01 ` Philippe Mathieu-Daudé
2020-02-01 19:21 ` Niek Linnenbank
2020-02-01 20:52 ` Philippe Mathieu-Daudé
2020-01-19 0:50 ` [PATCH v4 02/20] hw/arm: add Xunlong Orange Pi PC machine Niek Linnenbank
2020-01-19 18:04 ` Philippe Mathieu-Daudé
2020-02-02 22:47 ` Niek Linnenbank
2020-01-21 16:39 ` Igor Mammedov
2020-02-02 22:37 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 03/20] hw/arm/allwinner-h3: add Clock Control Unit Niek Linnenbank
2020-01-19 18:34 ` Philippe Mathieu-Daudé
2020-02-01 21:15 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 04/20] hw/arm/allwinner-h3: add USB host controller Niek Linnenbank
2020-01-19 18:37 ` Philippe Mathieu-Daudé
2020-01-19 18:44 ` Philippe Mathieu-Daudé
2020-02-02 19:33 ` Niek Linnenbank
2020-02-12 22:23 ` Philippe Mathieu-Daudé
2020-02-02 19:12 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 05/20] hw/arm/allwinner-h3: add System Control module Niek Linnenbank
2020-01-19 18:46 ` Philippe Mathieu-Daudé
2020-01-19 0:50 ` [PATCH v4 06/20] hw/arm/allwinner: add CPU Configuration module Niek Linnenbank
2020-01-19 18:52 ` Philippe Mathieu-Daudé
2020-02-02 20:25 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 07/20] hw/arm/allwinner: add Security Identifier device Niek Linnenbank
2020-01-19 18:57 ` Philippe Mathieu-Daudé
2020-02-02 20:47 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 08/20] hw/arm/allwinner: add SD/MMC host controller Niek Linnenbank
2020-01-19 19:01 ` Philippe Mathieu-Daudé
2020-02-02 21:43 ` Niek Linnenbank
2020-02-07 21:09 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 09/20] hw/arm/allwinner-h3: add EMAC ethernet device Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 10/20] hw/arm/allwinner-h3: add Boot ROM support Niek Linnenbank
2020-01-19 19:14 ` Philippe Mathieu-Daudé
2020-02-02 22:11 ` Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 11/20] hw/arm/allwinner-h3: add SDRAM controller device Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 12/20] hw/arm/allwinner: add RTC device support Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 13/20] tests/boot_linux_console: Add a quick test for the OrangePi PC board Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 14/20] tests/boot_linux_console: Add initrd test for the Orange Pi " Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 15/20] tests/boot_linux_console: Add a SD card test for the OrangePi " Niek Linnenbank
2020-01-19 0:50 ` [PATCH v4 16/20] tests/boot_linux_console: Add a SLOW test booting Ubuntu on OrangePi PC Niek Linnenbank
2020-01-19 22:30 ` Philippe Mathieu-Daudé
2020-02-06 21:21 ` Niek Linnenbank
2020-02-12 22:02 ` Philippe Mathieu-Daudé
2020-01-19 0:50 ` [PATCH v4 17/20] Acceptance tests: Extract _console_interaction() Niek Linnenbank
2020-01-19 0:51 ` [PATCH v4 18/20] Acceptance tests: Add interrupt_interactive_console_until_pattern() Niek Linnenbank
2020-01-19 0:51 ` [PATCH v4 19/20] tests/boot_linux_console: Test booting NetBSD via U-Boot on OrangePi PC Niek Linnenbank
2020-01-19 0:51 ` [PATCH v4 20/20] docs: add Orange Pi PC document Niek Linnenbank
2020-01-19 11:51 ` [PATCH v4 00/20] Add Allwinner H3 SoC and Orange Pi PC Machine Niek Linnenbank
2020-02-12 21:47 ` Niek Linnenbank
2020-02-12 22:12 ` Philippe Mathieu-Daudé
2020-02-17 20:27 ` Niek Linnenbank
2020-02-18 6:46 ` Philippe Mathieu-Daudé
2020-02-18 10:05 ` Peter Maydell [this message]
2020-02-18 21:50 ` Niek Linnenbank
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