Change (!bdrv_is_removable(bs) || bdrv_is_inserted(bs)) to just
bdrv_is_inserted(). Rationale:
The value of bdrv_is_removable(bs) matters only when
bdrv_is_inserted(bs) is false.
bdrv_is_inserted(bs) is true when bs is open (bs->drv != NULL) and
not an empty host drive (CD-ROM or floppy).
Therefore, bdrv_is_removable(bs) matters only when:
1. bs is not open
old: may call bdrv_flush(bs), which does nothing
new: won't call
2. bs is an empty host drive
old: may call bdrv_flush(bs), which calls driver method
raw_flush(), which calls fdatasync() or equivalent, which
can't do anything useful while the drive is empty
new: won't call
Result is bs->drv && !bdrv_is_read_only(bs) && bdrv_is_inserted(bs).
bdrv_is_inserted(bs) implies bs->drv. Drop the redundant test.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
fdctrl_change_cb() gets called on a virtual media change via monitor.
It would be nice if host device block drivers called it on physical
media change, but they don't.
bdrv_media_changed() lets you poll for media change, but it returns
"don't know" except with block driver "host_floppy".
FDrive member media_changed gets set on device initialization and by
fdctrl_change_cb(), and cleared by fdctrl_media_changed(). Thus, it's
set on first entry to fdctrl_media_changed() since device
initialization or virtual media change.
fdctrl_media_changed() ignores media_changed unless
bdrv_media_changed() returns "don't know". If we change media via
monitor (setting media_changed), and the new media's block driver
returns 0, we lose. Fortunately, "host_floppy" always returns 1 on
first call. Brittle. Clean it up not to rely on it.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Block driver "raw" forwards most methods to the underlying block
driver. However, it doesn't implement method bdrv_media_changed().
Makes bdrv_media_changed() always return -ENOTSUP.
I believe -fda /dev/fd0 gives you raw over host_floppy, and disk
change detection (fdc register 7 bit 7) is broken. Testing my theory
requires a computer museum, though.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Drop WIN_SRST, it has the same value as WIN_DEVICE_RESET.
Drop unused WIN_RESTORE, it has the same value as WIN_RECAL.
Drop codes that are not implemented and long obsolete: WIN_READ_LONG,
WIN_READ_LONG_ONCE, WIN_WRITE_LONG, WIN_WRITE_LONG_ONCE, WIN_FORMAT
(all obsolete since ATA4), WIN_ACKMEDIACHANGE, WIN_POSTBOOT,
WIN_PREBOOT (obsolete since ATA3), WIN_WRITE_SAME (obsolete since
ATA3, code reused for something else in ACS2), WIN_IDENTIFY_DMA
(obsolete since ATA4).
Drop codes that are not implemented and vendor-specific:
EXABYTE_ENABLE_NEST, DISABLE_SEAGATE.
Drop WIN_INIT, it isn't implemented, its value used to be reserved,
and is used for something else since ATA8.
CFA_IDLEIMMEDIATE isn't specific to CFATA. ACS-2 shows it as a
defined command in ATA-1, -2 and -3. Rename to WIN_IDLEIMMEDIATE2.
Mark vendor specific, retired, and obsolete codes.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Multiplexing callbacks complicates matters needlessly.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
For now, this just protects against programming errors like having the
same drive back multiple non-qdev devices, or untimely bdrv_delete().
Later commits will add other interesting uses.
While there, rename BlockDriverState member peer to dev, bdrv_attach()
to bdrv_attach_dev(), bdrv_detach() to bdrv_detach_dev(), and
bdrv_get_attached() to bdrv_get_attached_dev().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
qemu may segfault when a BH handler first deletes a BH and then (possibly
indirectly) calls a nested qemu_bh_poll(). This is because the inner instance
frees the BH and deletes it from the list that the outer one processes.
This patch deletes BHs only in the outermost qemu_bh_poll instance.
Commit 7887f620 already tried to achieve the same, but it assumed that the BH
handler would only delete its own BH. With a nested qemu_bh_poll(), this isn't
guaranteed, so that commit wasn't enough. Hope this one fixes it for real.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Requests depending on a failed request would end up waiting forever. This fixes
the error path to continue dependent requests even when the request has failed.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add some notes about Linux AIO explaining why we don't use AIO in
some situations.
Signed-off-by: Frediano Ziglio <freddy77@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
No change to the CPU kinds, so SMP will only work if
manually changing the cpu to 34Kf:
-cpu 34Kf -smp 2
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
1. The pending need to pass the Status IM gating.
2. The priority is from seven (highest prio) down to zero.
QEMU was doing the opposite.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
These registers share some of their fields. Writes to these fields
should be visible through the corresponding mirror fields.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
cfi02 is annoying in that is ignores some address bits; we probably
want explicit support in the memory API for that.
In order to get the correct opaque into the MemoryRegion object, the
allocation scheme is changed so that the flash emulation code allocates
memory, instead of the caller. This clears a FIXME in the flash code.
Signed-off-by: Avi Kivity <avi@redhat.com>
The code will remap all PAMs, even if just one is updated, resulting
in reduced performance. Wrap in a transaction to detect that those
other PAMs have not changed.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
This prevents spurious unmapping and remapping of the vga windows,
which reduces performance.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Add a new memory space for PCI instead of using system memory.
This also fixes a bug where VGA region vga.chain4 is
accidentally mapped to 0xa0000 instead of 0x1ff000a0000.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Prepares for uint32 replacement.
Signed-off-by: Andreas Färber <andreas.faerber@web.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
