We are mapping ESCC to a static (incorrect) address on machine init. This
overlaps with our vram, rendering the screen barely usable.
Since openBIOS is clever enough to map ESCC to where it needs to be, we can
just drop that invalid map and everyone's happy.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Missed during memory region conversion: The i8259 now depends on the ISA
bus being created first. Reorder the initialization.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This requires some amount of hoop-jumping, so that we don't
inadvertently claim port 0x3f6, which is used by ISA IDE.
The sysbus initialization path is as yet unconverted.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Slightly non-obvious with mips_jazz passing in the region
structure to populate.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
The only non-obvious part is pic_poll_read which used
"addr1 >> 7" to detect whether one referred to either
the master or slave PIC. Instead, test this directly.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
i8259 is an ISA device (or at least, depends on the ISA infrastructure to
register its ioport); and the ISA bus is supplied by piix4. Later patches
make this dependency explicit.
Use qemu_irq_proxy() to stop the cycle by adding an extra layer of
indirection.
Signed-off-by: Avi Kivity <avi@redhat.com>
In particular, the i8259 was being initialized before the ISA bus,
leading to a crash.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
To replace isa_init_ioport and isa_init_ioport_range
as the ISA devices are converted to the memory api.
[avi: use memory_region_size()]
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Not used yet, but at least we're provided with the correct region.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Returns the I/O address space. Useful for implementing
PCI-ISA bridge devices.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
In some cases we have a circular dependency involving irqs - the irq
controller depends on a bus, which in turn depends on the irq controller.
Add qemu_irq_proxy() which acts as a passthrough, except that the target
irq may be set later on.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
The virtio code uses wmb() macros in several places, as required by the
SMP-aware virtio protocol. However the wmb() macro is locally defined
to be a compiler barrier only. This is probably sufficient on x86
due to its strong storage ordering model, but it certainly isn't on other
platforms, such as ppc.
In any case, qemu already has some globally defined memory barrier macros
in qemu-barrier.h. This patch, therefore converts virtio.c to use those
barrier macros. The macros in qemu-barrier.h are also wrong (or at least,
safe for x86 only) but this way at least there's only one place to fix
them.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Need to check that guest slot/device number is not > 31 or walk off
the devfn table when checking if a devfn is available or not in a guest.
before this fix, passing in an addr=abc or addr=34,
can crash qemu, sometimes fail gracefully if data past end
of devfn table fails the availability test.
with this fix, get clean error:
Property 'pci-assign.addr' doesn't take value '34'
also tested when no addr= param passed for guest (pcicfg) address,
and that worked as well.
Signed-off-by: Don Dutile <ddutile@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Do not try to map against the PCI bar in the ISA version of the device.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
We need to initialize legacy_address_space during ISA VGA setup so that
the chain-4 alias can be registered properly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This is based on the original fix by Hervé Poussineau: pc_memory_init
actually takes a memory region for mapping BIOS and extension ROMs. That
equals the PCI memory region if PCI is available, but must be system
memory in the ISA case.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
[Originally sent to qemu-kvm list, but I was redirected here]
The Capabilities Pointer is NULL, so this bit shouldn't be set. The state of
this bit doesn't appear to change any behavior on Linux/Windows versions we've
tested, but it does cause Windows' PCI/PCI Express Compliance Test to balk.
I happen to have a physical 82540EM controller, and it also sets the
Capabilities Bit, but it actually has items on the capabilities list to go
with it :)
Signed-off-by: dann frazier <dann.frazier@canonical.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Wire up the OMAP1 GPIO clock -- this fixes a hw_error() on startup
with OMAP1 based machines (sx1, cheetah).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Convert the omap_intc devices to qdev. This includes adding
a 'revision' property which will be needed for omap3.
The bulk of this patch is the replacement of "s->irq[x][y]"
with "qdev_get_gpio_in(s->ih[x], y)" now that the interrupt
controller exposes its input lines as qdev gpio inputs.
The devices are named "omap-intc" and "omap2-intc", following
the filename and the OMAP2/3 hardware names, although some
internal functions are still named "omap_inth_*".
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Writing to IRQSTATUS should affect irqst, not irqen -- error
spotted by Andrzej Zaborowski.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
Promote the remark about why we handle FIFOTHRESHOLDSTATUS the
way we do from the commit message of de8af7fe0 to a comment in
the code.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andrzej Zaborowski <andrew.zaborowski@intel.com>
Add a new context flag PATHNAME_FSCONTEXT and indicate whether
the fs driver track fid using path names. Also add a private
pointer that help us to track fs driver specific values in there
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This enables us to add handles to track fids later. The
V9fsPath added is similar to V9fsString except that the
size include the NULL byte also.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
On rename we take the write lock and this ensure path
doesn't change as we operate on them.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Implement an I/O space index-data register pair as defined by the AHCI
spec, including the corresponding SATA PCI capability and BAR.
This allows real-mode code to access the AHCI registers; real-mode
code cannot address the memory-mapped register space because it is
beyond the first megabyte.
Signed-off-by: Daniel Verkamp <daniel@drv.nu>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
It's a trivial wrapper for soc_dma_port_add_mem(), which makes
the memory API conversion more difficult because it takes a ram
addr_t. Drop.
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
When assigning a 32-bit value to cmd->xfer (which is 64-bits)
it can be erroneously sign extended because the intermediate
32-bit computation is signed. Fix this by standardizing on
the ld*_be_p functions.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
I've found that FreeBSD AHCI driver doesn't work with AHCI hardware
emulation of QEMU 0.15.0. I believe the problem is on QEMU's side. As I
see, it clears port's Interrupt Enable register each time when reset of
any level happens. Is is reasonable for the global controller reset. It
is probably not good, but acceptable for FreeBSD driver for the port
hard reset. But it is IMO wrong for the device soft reset. None of real
hardware I know behaves that way.
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
It will not be needed for reads and writes if the HBA provides a sglist.
In addition, this lets scsi-disk refuse commands with an excessive
allocation length, as well as limit memory on usual well-behaved guests.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Also, consistently use qiov.size instead of iov.iov_len.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Support bridge filtering on top of the memory
API as suggested by Avi Kivity:
Create a memory region for the bridge's address space. This region is
not directly added to system_memory or its descendants. Devices under
the bridge see this region as its pci_address_space(). The region is
as large as the entire address space - it does not take into account
any windows.
For each of the three windows (pref, non-pref, vga), create an alias
with the appropriate start and size. Map the alias into the bridge's
parent's pci_address_space(), as subregions.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The switch to the new memory API caused the following problem:
The pci device may call pci_register_bar() to use PCI bus's address
space. But we don't init PCI bus's address space if it is not bus
0. A crash was reported:
http://lists.gnu.org/archive/html/qemu-devel/2011-08/msg02243.html
More work will be needed to make bridge filtering work correctly
with the memory API.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Fix up some erroneous comments in code:
interrupt pins are named A-D, the
interrupt pin register is always readonly
and isn't zeroed out on reset.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
eepro100 was the last user. Now pci_add_capability is powerful enough.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
I found no rationale for this in the logs, and it is quite bad because
it will make scsi-generic unsafe WRT power failures.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Since we use memory API in sun4u.c, after
71579cae30, setting up isa_mem_base
puts vga.chain4 outside of the physical address space.
Fix by removing obsolete isa_mem_base set up.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The virtio device lifecycle can be observed by looking at the sequence
of set status operations. This is especially important for catching the
reset operation (status value 0), which resets the device and all
virtqueues.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Make qdev_device_help print both device and bus properties.
Helps libvirt to figure whenever bus properties such as
PCI.multifunction are supported present or not.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This does not yet unbreak PPC (which has its own problems) but
potentially other non-x86 systems where isa_mem_base is != 0.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Fix a number of bugs in the implementation of writes to the CM_CTRL
system register:
* write to cm_ctrl, not cm_init !
* an '&' vs '^' typo meant we would write the inverse of the bits
* handling the LED via printf() meant we spew lots of output
to stdout when Linux uses the LED as a heartbeat indicator
* we would hw_error() if a reset was requested rather than
actually resetting
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
In text mode, even a full refresh of the screen takes multiple updates.
As we reset the dump file pointer after the first call, we only wrote
the first line.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Those blanks violate the coding conventions, see
scripts/checkpatch.pl.
Blanks missing after colons in the changed lines were added.
This patch does not try to fix tabs, long lines and other
problems in the changed lines, therefore checkpatch.pl reports
many violations.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Today, when notifying a VM state change with vm_state_notify(),
we pass a VMSTOP macro as the 'reason' argument. This is not ideal
because the VMSTOP macros tell why qemu stopped and not exactly
what the current VM state is.
One example to demonstrate this problem is that vm_start() calls
vm_state_notify() with reason=0, which turns out to be VMSTOP_USER.
This commit fixes that by replacing the VMSTOP macros with a proper
state type called RunState.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Member variable is_read is written, but never read
(contrary to its name). Remove it.
Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
change fails while the tray is locked by the guest. eject -f forces
it open and removes any media. Unfortunately, the tray closes again
instantly. Since the lock remains as it is, there is no way to insert
another medium unless the guest voluntarily unlocks.
Fix by leaving the tray open after monitor eject.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
To let device models distinguish between eject and load.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Device models should be able to set it without an unclean include of
block_int.h.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Including it in device models is unclean, including it without a
reason adds insult to injury.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
It's convenience stuff for block device models, so block.h isn't the
ideal home either, but better than block_int.h.
Permits moving some #include "block_int.h" from device model .h into
.c.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Need to ask the device, so this requires new BlockDevOps member
is_tray_open().
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
It's a confused mess (see previous commit). No users remain.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
BlockDriverState member removable is a confused mess. It is true when
an ide-cd, scsi-cd or floppy qdev is attached, or when the
BlockDriverState was created with -drive if={floppy,sd} or -drive
if={ide,scsi,xen,none},media=cdrom ("created removable"), except when
an ide-hd, scsi-hd, scsi-generic or virtio-blk qdev is attached.
Three users remain:
1. eject_device(), via bdrv_is_removable() uses it to determine
whether a block device can eject media.
2. bdrv_info() is monitor command "info block". QMP documentation
says "true if the device is removable, false otherwise". From the
monitor user's point of view, the only sensible interpretation of
"is removable" is "can eject media with monitor commands eject and
change".
A block device can eject media unless a device is attached that
doesn't support it. Switch the two users over to new
bdrv_dev_has_removable_media() that returns exactly that.
3. bdrv_getlength() uses to suppress its length cache when media can
change (see commit 46a4e4e6). Media change is either monitor
command change (updates the length cache), monitor command eject
(doesn't update the length cache, easily fixable), or physical
media change (invalidates length cache, not so easily fixable).
I'm refraining from improving anything here, because this series is
long enough already. Instead, I simply switch it over to
bdrv_dev_has_removable_media() as well.
This changes the behavior of the length cache and of monitor commands
eject and change in two cases:
a. drive not created removable, no device attached
The commit makes the drive removable, and defeats the length cache.
Example: -drive if=none
b. drive created removable, but the attached drive is non-removable,
and doesn't call bdrv_set_removable(..., 0) (most devices don't)
The commit makes the drive non-removable, and enables the length
cache.
Example: -drive if=xen,media=cdrom -M xenpv
The other non-removable devices that don't call
bdrv_set_removable() can't currently use a drive created removable,
either because they aren't qdevified, or because they lack a drive
property. Won't stay that way.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Use a subsection, so that migration to older version still works,
provided the tray is closed and unlocked.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
MMC-5 6.40.2.6 specifies that START STOP UNIT succeeds when the drive
already has the requested state. cmd_start_stop_unit() fails when
asked to eject while the tray is open and locked. Fix that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Requires new BlockDevOps member is_medium_locked(). Implement for IDE
and SCSI CD-ROMs.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The device model knows best when to accept the guest's eject command.
No need to detour through the block layer.
bdrv_eject() can't fail anymore. Make it void.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We already track it in BlockDriverState. Just like tray open/close
state, we should track it in the device models instead, because it's
device state.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We already track it in BlockDriverState. Just like tray open/close
state, we should track it in the device models instead, because it's
device state.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Commit 4be9762a changed bdrv_is_inserted() to fail when the tray is
open. Unfortunately, there are two different kinds of users, with
conflicting needs.
1. Device models using bdrv_eject(), currently ide-cd and scsi-cd.
They expect bdrv_is_inserted() to reflect the tray status. Commit
4be9762a makes them happy.
2. Code that wants to know whether a BlockDriverState has media, such
as find_image_format(), bdrv_flush_all(). Commit 4be9762a makes them
unhappy. In particular, it breaks flush on VM stop for media ejected
by the guest.
Revert the change to bdrv_is_inserted(). Check the tray status in the
device models instead.
Note on IDE: Since only ATAPI devices have a tray, and they don't
accept ATA commands since the recent commit "ide: Reject ATA commands
specific to drive kinds", checking in atapi.c suffices.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We already track it in BlockDriverState since commit 4be9762a. As
discussed in that commit's message, we should track it in the device
device models instead, because it's device state.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We already track it in BlockDriverState since commit 4be9762a. As
discussed in that commit's message, we should track it in the device
device models instead, because it's device state.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
"eject" is misleading; it means "eject" when start is clear, but
"load" when start is set. Rename to loej, because that's how MMC-5
calls it, in section 6.40.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
ACS-2 Table B.2 explicitly prohibits ATAPI devices from implementing
WIN_RECAL, WIN_READ_EXT, WIN_READDMA_EXT, WIN_READ_NATIVE_MAX,
WIN_MULTREAD_EXT, WIN_WRITE, WIN_WRITE_ONCE, WIN_WRITE_EXT,
WIN_WRITEDMA_EXT, WIN_MULTWRITE_EXT, WIN_WRITE_VERIFY, WIN_VERIFY,
WIN_VERIFY_ONCE, WIN_VERIFY_EXT, WIN_SPECIFY, WIN_MULTREAD,
WIN_MULTWRITE, WIN_SETMULT, WIN_READDMA, WIN_READDMA_ONCE,
WIN_WRITEDMA, WIN_WRITEDMA_ONCE, WIN_FLUSH_CACHE_EXT. Restrict them
to IDE_HD and IDE_CFATA.
Same for CFA_WRITE_SECT_WO_ERASE, CFA_WRITE_MULTI_WO_ERASE. Restrict
them to IDE_CFATA, like the other CFA_ commands.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
No functional change.
It would be nice to have handler functions in the table, like commit
e1a064f9 did for ATAPI. Left for another day.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Must set the ATAPI device signature, see ATA4 8.27.5.2 Outputs for
PACKET Command feature set devices, and ACS-2 7.36.6 Outputs for
PACKET feature set devices.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
See ISA, 4.4.6 (interrupt option), 4.4.7 (high priority interrupt
option) and 4.4.8 (timer interrupt option) for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Sample board and sample CPU core are used for debug and may be used for
development of custom SoC emulators.
This board has two fixed size memory regions for DTCM and ITCM and
variable length SRAM region.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Move mipsnet_init() function to mipssim machine
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Avoid this warning from clang analyzer by deleting the variable:
/src/qemu/hw/lsi53c895a.c:895:5: warning: Value stored to 'id' is never read
id = (current_tag >> 8) & 0xf;
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The code does not have any effect as is, fix it.
Spotted by clang analyzer:
/src/qemu/hw/hid.c:99:13: warning: Value stored to 'x1' is never read
x1 = 1;
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Compile g364fb in hwlib. Two compilations less for the full build.
Acked-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Initialize glib threads unconditionally in main() instead
of using g_thread_get_initialized in the 9p code.
Fixes a build failure on RHEL-5, which ships glib 2.12.
g_thread_get_initialized was added in 2.20.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Adding a 2nd balloon device after unplugging the first one doesn't work.
Also, the 'info balloon' command should indicate an error mentioning no
balloon device is registered after unplug.
Reproduction steps given by Shaolong Hu:
(qemu) info balloon
Device 'balloon' has not been activated by the guest
(qemu) device_add virtio-balloon-pci,id=balloon1
(qemu) info balloon
balloon: actual=4096
(qemu) balloon 2048
(qemu) info balloon
balloon: actual=2048
(qemu) device_del balloon1
(qemu) info balloon
balloon: actual=4096
(qemu) balloon 2048
(qemu) info balloon
balloon: actual=4096
(qemu) device_del balloon1
Device 'balloon1' not found
(qemu) device_add virtio-balloon-pci,id=balloon1
Another balloon device already registered
Device 'virtio-balloon-pci' could not be initialized
(qemu) device_add virtio-balloon-pci,id=balloon2
Another balloon device already registered
Device 'virtio-balloon-pci' could not be initialized
Reported-by: Shaolong Hu <shu@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Ensure that we read "request-abs-pointer" after the frontend has written
it. This means that we will correctly set up an ansolute or relative
pointer handler correctly.
Signed-off-by: John Haxby <john.haxby@oracle.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Rename the existing xendev 'connect' op to 'initialised' and introduce
a new 'connected' op. This new op, if defined, is called when the
backend is connected. Note that since there is no state transition this
may be called more than once.
Signed-off-by: John Haxby <john.haxby@oracle.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
unlinkat - Remove a directory entry
size[4] Tunlinkat tag[2] dirfid[4] name[s] flag[4]
size[4] Runlinkat tag[2]
older Tremove have the below request format
size[4] Tremove tag[2] fid[4]
The remove message is used to remove a directory entry either file or directory
The remove opreation is actually a directory opertation and should ideally have
dirfid, if not we cannot represent the fid on server with anything other than
name. We will have to derive the directory name from fid in the Tremove request.
NOTE: The operation doesn't clunk the unlink fid.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
rename - change name of file or directory
size[4] Trenameat tag[2] olddirfid[4] oldname[s] newdirfid[4] newname[s]
size[4] Rrenameat tag[2]
older Trename have the below request format
size[4] Trename tag[2] fid[4] newdirfid[4] name[s]
The rename message is used to change the name of a file, possibly moving it
to a new directory. The rename opreation is actually a directory opertation
and should ideally have olddirfid, if not we cannot represent the fid on server
with anything other than name. We will have to derive the old directory name
from fid in the Trename request.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Since qid is allocated out of stack we need to intialize
the field to zero. Otherwise we will send wrong qid value
to client.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
We need to update the fidp path before opendir. Since we don't
use the fid returned by mkdir, earlier code should not have
much issue. We do a double v9fs_string_copy here. The later patch
cleanup the entire function.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
* qemu-common.h is not a system include file, so it should be included
with "" instead of <>. Otherwise incremental builds might fail
because only local include files are checked for changes.
* linux-user/syscall.c included the file twice.
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
This error was reported by cppcheck:
qemu/hw/9pfs/virtio-9p-debug.c:342:
error: Invalid number of character ({) when these macros are defined:
'DEBUG_DATA'.
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Add a separate reset function musb_reset() to the usb-musb interface,
so that users who implement a reset function can also reset usb-musb.
Use this in tusb6010.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Initialise usb-musb by passing it a DeviceState* and the offset of the
IRQs in its gpio array, rather than a plain pointer to an irq array.
This is simpler for callers and also allows us to pass in a valid parent
to usb_bus_new(), so the USB bus actually appears in the qdev tree.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Identifiers with double leading underscore are reserved, so rename
__musb_irq_max so we don't encroach on reserved namespace.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch makes qemu assign a port when creating the device, not when
attaching it. For most usb devices this isn't a noticable difference
because they are in attached state all the time.
The change affects usb-host devices which live in detached state while
the real device is unplugged from the host. They have a fixed port
assigned all the time now instead of getting grabbing one on attach and
releasing it at detach, i.e. they stop floating around at the usb bus.
The change also allows to simplify usb-hub. It doesn't need the
handle_attach() callback any more to configure the downstream ports.
This can be done at device initialitation time now. The changed
initialization order (first grab upstream port, then register downstream
ports) also fixes some icky corner cases. For example it is not possible
any more to plug the hub into one of its own downstream ports.
The usb host adapters must care too. USBPort->dev being non-NULL
doesn't imply any more the device is in attached state. The host
adapters must additionally check the USBPort->dev->attached flag.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The ->complete() callback might have released the USBPacket (uhci
actually does), so we must not touch it after the callback returns.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This patch adds code to do minimal siTD handling, which is basically
just following the next pointer. This is good enougth to handle the
inactive siTDs used by FreeBSD. Active siTDs are skipped too as we
don't have split transfer support in qemu, additionally a warning is
printed.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
if qxl_send_events was called from spice server context, and then
migration had completed before a call to pipe_read, the target
guest qxl driver didn't get the interrupt. In addition,
qxl_send_events ignored further interrupts of the same kind, since
ram->int_pending was set. As a result, the guest driver was stacked
or very slow (when the waiting for the interrupt was with timeout).
Signed-off-by: Yonit Halperin <yhalperi@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Fix format string errors causing compile failure on 32 bit hosts
when spice is enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
- do not return extra pages when requesting all pages (PAGE CODE = 0x3f)
- return correct sense code for PC = 3 (saved parameters not supported)
- do not return geometry pages for CD devices
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Even though we do not use them, we should include the last three
bytes of sense data in the additional sense length.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Rename SERVICE_ACTION_IN to SERVICE_ACTION_IN_16 to distinguish
from the 12-byte CDB variant, and add a constant for the subcommand.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Writes go through scsi_write_complete at least twice, the first time
to get some data without having actually written anything. Because
of this, the first time scsi_write_complete is called it will call
bdrv_acct_done and account a read incorrectly. Fix this by looking
at the aiocb. I am doing the same in scsi_read_complete for symmetry,
but it is only needed in the (bogus) case of bdrv_aio_readv returning
NULL.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Device models should be able to use it without an unclean include of
block_int.h.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
We try the drive defined with -drive if=ide,index=0 (or equivalent
sugar). We use it only if (dinfo && bdrv_is_inserted(dinfo->bdrv) &&
!bdrv_is_removable(dinfo->bdrv)). This is a convoluted way to test
for "drive media can't be removed".
The only way to create such a drive with -drive if=ide is media=cdrom.
And that sets dinfo->media_cd, so just test that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
pci_piix3_xen_ide_unplug() unplugs only disks, not CD-ROMs. It peeks
into the DriveInfo's BlockDriverState to distinguish between the two.
Unclean; use DriveInfo member media_cd, like xen_config_dev_blk().
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>
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>
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>
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>
Most changes were made using these commands:
git grep -la '__attribute__((packed))'|xargs perl -pi -e 's/__attribute__\(\(packed\)\)/QEMU_PACKED/'
git grep -la '__attribute__ ((packed))'|xargs perl -pi -e 's/__attribute__ \(\(packed\)\)/QEMU_PACKED/'
git grep -la '__attribute__((__packed__))'|xargs perl -pi -e 's/__attribute__\(\(__packed__\)\)/QEMU_PACKED/'
git grep -la '__attribute__ ((__packed__))'|xargs perl -pi -e 's/__attribute__ \(\(__packed__\)\)/QEMU_PACKED/'
git grep -la '__attribute((packed))'|xargs perl -pi -e 's/__attribute\(\(packed\)\)/QEMU_PACKED/'
Whitespace in linux-user/syscall_defs.h was fixed manually
to avoid warnings from scripts/checkpatch.pl.
Manual changes were also applied to hw/pc.c.
I did not fix indentation with tabs in block/vvfat.c.
The patch will show 4 errors with scripts/checkpatch.pl.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Enabling the I/O thread by default seems like an important part of declaring
1.0. Besides allowing true SMP support with KVM, the I/O thread means that the
TCG VCPU doesn't have to multiplex itself with the I/O dispatch routines which
currently requires a (racey) signal based alarm system.
I know there have been concerns about performance. I think so far the ones that
have come up (virtio-net) are most likely due to secondary reasons like
decreased batching.
I think we ought to force enabling I/O thread early in 1.0 development and
commit to resolving any lingering issues.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
cppcheck reports this error:
qemu/hw/sh_intc.c:390: error: Possible null pointer dereference:
s - otherwise it is redundant to check if s is null at line 385
If s were NULL, the printf() statement would crash.
Setting braces fixes this bug.
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Reviewed-by: Andreas Färber <andreas.faerber@web.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Convert the tusb6010 to qdev.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit implements the prefetch engine feature of the GPMC
which can be used for NAND devices. This includes both interrupt
driven and DMA-filling modes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Refactor the gpmc state structure so items relating to
the prefetch engine are in their own sub-struct and have
more useful names.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
OMAP3630 adds an extra bit of address masking, so a mask of
0xb1111 is valid. Unfortunately the GPMC_REVISION is the same as
on the OMAP3430 which only has three bits of address masking, so
we have to derive this feature directly from the OMAP revision
rather than from the GPMC revision.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add the OMAP 3630 to the omap_mpu_model enumeration, and add the
corresponding cpu_is_omap3630() function.
(OMAP3 isn't supported yet but this is useful in upgrading common
components to be "OMAP3 ready". We already have this for OMAP3430.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Support accesses to NAND devices, both by mapping them into
the GPMC address space, and via the NAND_COMMAND, NAND_ADDRESS
and NAND_DATA GPMC registers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Take a pointer to the omap mpu state struct in omap_gpmc_init.
Some details of GPMC behaviour depend on the OMAP version we
are a part of.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The OMAP3 TRM is inconsistent about whether the GPMC FIFOTHRESHOLDSTATUS
bit should be set when FIFOPOINTER > FIFOTHRESHOLD or when it is >=
FIFOTHRESHOLD. Apparently the underlying functional spec from which
the TRM was created states that the behaviour is ">=", and this also
makes more conceptual sense.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The omap_gpmc wasn't actually wiring up its IRQ, so
anything that provoked an interrupt would be using
uninitialised data for its IRQ number.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Fix a bug in the handling of writes to GPMC_IRQSTATUS:
it behaves as "write one to clear, writing zero is ignored".
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Refactor the omap_gpmc_cs_map/unmap functions:
* take the omap_gpmc_s* and a chipselect id rather than the
omap_gpmc_cs_file_s*, so they have access to the general gpmc
member fields
* extract the base and mask from the config registers in the functions
rather than at every callsite
* check for CSVALID in the functions rather than at every callsite
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now that all callers of omap_gpmc_attach pass in a MemoryRegion*,
we can remove the base_update and unmap function pointer arguments,
and the opaque pointer that was passed into these callbacks.
We can also remove the base and size fields from omap_gpmc_cs_file_s
as these are no longer necessary (you don't need the base/size
to unmap a MemoryRegion the way you did to undo a mapping made
with cpu_register_physical_memory()).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Minor whitespace-only cleanup (separated out from the qdevifying
patch for clarity).
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Qdevify the ONENAND device.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Refactor onenand_command() -- since it is essentially a method of
the device object, it doesn't make sense to pass in something as
an argument which is one of the object's own member fields.
Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
[Riku Voipio: Fixes and restructuring patchset]
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
[Peter Maydell: More fixes and cleanups for upstream submission]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Add a sysbus_mmio_get_region() which allows users of sysbus
devices to turn a (SysBusDevice*, mmioidx) tuple into a
MemoryRegion*. This enables some useful simplifications of
devices which pass through another device's mmio region
(either directly or by implementing some kind of memory
controller device).
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The a7 area was set up as an alias of itself, rather than the p4 area. This
sent the memory core into infinite recursion.
Fix by aliasing the a7 area to the p4 area.
Signed-off-by: Avi Kivity <avi@redhat.com>
clear interrupt request if the interrupt priority < CPU pil
clear hardware interrupt request if interrupts are disabled
Signed-off-by: Artyom Tarasenko <atar4qemu@gmail.com>
[blauwirbel@gmail.com: added a comment about magic 2]
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Extract G364 ROM contents from device emulation to machine emulation,
so device emulation can be reused in other machines (Commodore Amiga)
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
When the vhost notifier is disabled, the userspace handler runs
immediately: virtio_pci_set_host_notifier_internal might
call virtio_queue_notify_vq.
Since the VQ state and the tap backend state aren't
recovered yet, this causes
"Guest moved used index from XXX to YYY" assertions.
The solution is to split out host notifier handling
from vhost VQ setup and disable notifiers as our last step
when we stop vhost-net. For symmetry enable them first thing
on start.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This reverts commit 8ef9ea85a2, reversing
changes made to 444dc48298.
From Avi:
Please revert the entire pull (git revert 8ef9ea85a2) while I work this
out - it isn't trivial.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Some gcc versions do not properly detect that all possible cases are
covered and base and size are always initialized. Please gcc by defining
a pseudo default case.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Decouple the I/O accounting from bdrv_aio_readv/writev/flush and
make the hardware models call directly into the accounting helpers.
This means:
- we do not count internal requests from image formats in addition
to guest originating I/O
- we do not double count I/O ops if the device model handles it
chunk wise
- we only account I/O once it actuall is done
- can extent I/O accounting to synchronous or coroutine I/O easily
- implement I/O latency tracking easily (see the next patch)
I've conveted the existing device model callers to the new model,
device models that are using synchronous I/O and weren't accounted
before haven't been updated yet. Also scsi hasn't been converted
to the end-to-end accounting as I want to defer that after the pending
scsi layer overhaul.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
