LLaurent Vivierswim: update IWM/ISM register block decoding
| 文件 | 最后提交记录 | 最后更新时间 |
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block: add missed block_acct_setup with new block device init procedure Commit 5f76a7aac156ca75680dad5df4a385fd0b58f6b1 is looking harmless from the first glance, but it has changed things a lot. 'libvirt' uses it to detect that it should follow new initialization way and this changes things considerably. With this procedure followed, blockdev_init() is not called anymore and thus block_acct_setup() helper is not called. This means in particular that defaults for block accounting statistics are changed and account_invalid/account_failed are actually initialized as false instead of true originally. This commit changes things to match original world. There are the following constraints: * new default value in block_acct_init() is set to true * block_acct_setup() inside blockdev_init() is called before blkconf_apply_backend_options() * thus newly created option in block device properties has precedence if specified Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru> CC: Peter Krempa <pkrempa@redhat.com> CC: Markus Armbruster <armbru@redhat.com> CC: John Snow <jsnow@redhat.com> CC: Kevin Wolf <kwolf@redhat.com> CC: Hanna Reitz <hreitz@redhat.com> Message-Id: <20220824095044.166009-3-den@openvz.org> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com> | 3 年前 | |
hw/block/fdc-sysbus: Always mark sysbus floppy controllers as not having DMA The sysbus floppy controllers (devices sysbus-fdc and sun-fdtwo) don't support DMA. The core floppy controller code expects this to be indicated by setting FDCtrl::dma_chann to -1. This used to be done in the device instance_init functions sysbus_fdc_initfn() and sun4m_fdc_initfn(), but in commit 1430759ec3e we refactored this code and accidentally lost the setting of dma_chann. For sysbus-fdc this has no ill effects because we were redundantly also setting dma_chann in fdctrl_init_sysbus(), but for sun-fdtwo this means that guests which try to enable DMA on the floppy controller will cause QEMU to crash because FDCtrl::dma is NULL. Set dma_chann to -1 in the common instance init, and remove the redundant code in fdctrl_init_sysbus() that is also setting it. There is a six-year-old FIXME comment in the jazz board code to the effect that in theory it should support doing DMA via a custom DMA controller. If anybody ever chooses to fix that they can do it by adding support for setting both FDCtrl::dma_chann and FDCtrl::dma. (A QOM link property 'dma-controller' on the sysbus device which can be set to an instance of IsaDmaClass is probably the way to go.) Fixes: 1430759ec3 ("hw/block/fdc: Extract SysBus floppy controllers to fdc-sysbus.c") Resolves: https://gitlab.com/qemu-project/qemu/-/issues/958 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Message-Id: <20220505101842.2757905-1-peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> | 4 年前 | |
m25p80: Introduce an helper to retrieve the BlockBackend of a device It will help in getting rid of some drive_get(IF_MTD) calls by retrieving the BlockBackend directly from the m25p80 device. Cc: Alistair Francis <alistair@alistair23.me> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Cédric Le Goater <clg@kaod.org> | 2 年前 | |
swim: update IWM/ISM register block decoding Update the IWM/ISM register block decoding to match the description given in the "SWIM Chip Users Reference". This allows us to validate the device response to the guest OS which currently only does just enough to indicate that the floppy drive is unavailable. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Laurent Vivier <laurent@vivier.eu> Message-ID: <20231004083806.757242-14-mark.cave-ayland@ilande.co.uk> Signed-off-by: Laurent Vivier <laurent@vivier.eu> | 2 年前 |