First, this permission never protected a node from being changed, as
generic child-replacing functions don't check it.
Second, it's a strange thing: it presents a permission of parent node
to change its child. But generally, children are replaced by different
mechanisms, like jobs or qmp commands, not by nodes.
Graph-mod permission is hard to understand. All other permissions
describe operations which done by parent node on its child: read,
write, resize. Graph modification operations are something completely
different.
The only place where BLK_PERM_GRAPH_MOD is used as "perm" (not shared
perm) is mirror_start_job, for s->target. Still modern code should use
bdrv_freeze_backing_chain() to protect from graph modification, if we
don't do it somewhere it may be considered as a bug. So, it's a bit
risky to drop GRAPH_MOD, and analyzing of possible loss of protection
is hard. But one day we should do it, let's do it now.
One more bit of information is that locking the corresponding byte in
file-posix doesn't make sense at all.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210902093754.2352-1-vsementsov@virtuozzo.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Consider the case when the whole buffer is zero and end is unaligned.
If i <= tail, we return 1 and do one unaligned WRITE, RMW happens.
If i > tail, we do on aligned WRITE_ZERO (or skip if target is zeroed)
and again one unaligned WRITE, RMW happens.
Let's do better: don't fragment the whole-zero buffer and report it as
ZERO: in case of zeroed target we just do nothing and avoid RMW. If
target is not zeroes, one unaligned WRITE_ZERO should not be much worse
than one unaligned WRITE.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211217164654.1184218-3-vsementsov@virtuozzo.com>
Tested-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This demonstrates what happens when the block status changes in
sub-min_sparse granularity, but all of the parts are zeroed out. The
alignment logic in is_allocated_sectors() prevents that the target image
remains fully sparse as expected, but turns it into a data cluster of
explicit zeros.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20211217164654.1184218-2-vsementsov@virtuozzo.com>
Tested-by: Peter Lieven <pl@kamp.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The calculation in sector2cluster() is done relative to the offset of
the root directory. Any writes to blocks before the start of the root
directory (in particular, writes to the FAT) result in negative values,
which are not handled correctly in vvfat_write().
This changes sector2cluster() to return a signed value, and makes sure
that vvfat_write() doesn't try to find mappings for negative cluster
number. It clarifies the code in vvfat_write() to make it more obvious
that the cluster numbers can be negative.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20211209152231.23756-1-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The size of the qcow size was calculated so that only the FAT partition
would fit on it, but not the whole disk. However, offsets relative to
the whole disk are used to access it, so increase its size to be large
enough for that.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20211209151815.23495-1-kwolf@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
With CAP_DAC_OVERRIDE (which e.g. root generally has), permission checks
will be bypassed when opening files.
308 in one instance tries to open a read-only file (FUSE export) with
qemu-io as read/write, and expects this to fail. However, when running
it as root, opening will succeed (thanks to CAP_DAC_OVERRIDE) and only
the actual write operation will fail.
Note this as "Case not run", but have the test pass in either case.
Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Fixes: 2c7dd057aa
("export/fuse: Pass default_permissions for mount")
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220103120014.13061-1-hreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Test the following scenario:
- Simple stream block in two-layer backing chain (base and top)
- The job is drained via blk_drain(), then an error occurs while the job
settles the ongoing request
- And so the job completes while in blk_drain()
This was reported as a segfault, but is fixed by "block-backend: prevent
dangling BDS pointers across aio_poll()".
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2036178
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220111153613.25453-3-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The BlockBackend root child can change when aio_poll() is invoked. This
happens when a temporary filter node is removed upon blockjob
completion, for example.
Functions in block/block-backend.c must be aware of this when using a
blk_bs() pointer across aio_poll() because the BlockDriverState refcnt
may reach 0, resulting in a stale pointer.
One example is scsi_device_purge_requests(), which calls blk_drain() to
wait for in-flight requests to cancel. If the backup blockjob is active,
then the BlockBackend root child is a temporary filter BDS owned by the
blockjob. The blockjob can complete during bdrv_drained_begin() and the
last reference to the BDS is released when the temporary filter node is
removed. This results in a use-after-free when blk_drain() calls
bdrv_drained_end(bs) on the dangling pointer.
Explicitly hold a reference to bs across block APIs that invoke
aio_poll().
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2021778
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2036178
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220111153613.25453-2-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
When building QEMU with --disable-vhost-user and using introspection,
query-qmp-schema lists vhost-user-blk even though it's not actually
available:
{ "execute": "query-qmp-schema" }
{
"return": [
...
{
"name": "312",
"members": [
{
"name": "nbd"
},
{
"name": "vhost-user-blk"
}
],
"meta-type": "enum",
"values": [
"nbd",
"vhost-user-blk"
]
},
Restrict vhost-user-blk in BlockExportType when
CONFIG_VHOST_USER_BLK_SERVER is disabled, so it
doesn't end listed by query-qmp-schema.
Fixes: 90fc91d50b ("convert vhost-user-blk server to block export API")
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220107105420.395011-4-f4bug@amsat.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Add missing vhost-user-blk help:
$ qemu-storage-daemon -h
...
--export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,
addr.type=unix,addr.path=<socket-path>[,writable=on|off]
[,logical-block-size=<block-size>][,num-queues=<num-queues>]
export the specified block node as a
vhosts-user-blk device over UNIX domain socket
--export [type=]vhost-user-blk,id=<id>,node-name=<node-name>,
fd,addr.str=<fd>[,writable=on|off]
[,logical-block-size=<block-size>][,num-queues=<num-queues>]
export the specified block node as a
vhosts-user-blk device over file descriptor
...
Fixes: 90fc91d50b ("convert vhost-user-blk server to block export API")
Reported-by: Qing Wang <qinwang@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220107105420.395011-3-f4bug@amsat.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220107105420.395011-2-f4bug@amsat.org>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
The -device JSON syntax impl leaks a reference on the created
DeviceState instance. As a result when you hot-unplug the
device, the device_finalize method won't be called and thus
it will fail to emit the required DEVICE_DELETED event.
A 'json-cli' feature was previously added against the
'device_add' QMP command QAPI schema to indicated to mgmt
apps that -device supported JSON syntax. Given the hotplug
bug that feature flag is not usable for its purpose, so
we add a new 'json-cli-hotplug' feature to indicate the
-device supports JSON without breaking hotplug.
Fixes: 5dacda5167
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/802
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220105123847.4047954-2-berrange@redhat.com>
Reviewed-by: Laurent Vivier <lvivier@redhat.com>
Tested-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Remove drive_get_max_devs, as it is not used by anyone.
Last use was removed in commit 8f2d75e81d
("hw: Drop superfluous special checks for orphaned -drive").
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20211215121140.456939-4-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
drive_def is only a particular use case of
qemu_opts_parse_noisily, so it can be inlined.
Also remove drive_mark_claimed_by_board, as it is only defined
but not implemented (nor used) anywhere.
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20211215121140.456939-3-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
bdrv_backing_overridden is only used in block.c, so there is
no need to leave it in block_int.h
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20211215121140.456939-2-eesposit@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* KVM_GET/SET_SREGS2 support for x86
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Merge remote-tracking branch 'remotes/bonzini-gitlab/tags/for-upstream' into staging
* configure and meson cleanups
* KVM_GET/SET_SREGS2 support for x86
# gpg: Signature made Wed 12 Jan 2022 13:09:19 GMT
# gpg: using RSA key F13338574B662389866C7682BFFBD25F78C7AE83
# gpg: issuer "pbonzini@redhat.com"
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" [full]
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" [full]
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini-gitlab/tags/for-upstream:
meson: reenable filemonitor-inotify compilation
meson: build all modules by default
configure: do not create roms/seabios/config.mak if SeaBIOS not present
tests/tcg: Fix target-specific Makefile variables path for user-mode
KVM: x86: ignore interrupt_bitmap field of KVM_GET/SET_SREGS
KVM: use KVM_{GET|SET}_SREGS2 when supported.
meson: add comments in the target-specific flags section
configure, meson: move config-poison.h to meson
meson: build contrib/ executables after generated headers
configure: move non-command-line variables away from command-line parsing section
configure: parse --enable/--disable-strip automatically, flip default
configure, makefile: remove traces of really old files
configure: do not set bsd_user/linux_user early
configure: simplify creation of plugin symbol list
block/file-posix: Simplify the XFS_IOC_DIOINFO handling
meson: cleanup common-user/ build
user: move common-user includes to a subdirectory of {bsd,linux}-user/
meson: reuse common_user_inc when building files specific to user-mode emulators
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* New SLOF for PPC970 and POWER5+ (Alexey)
* Fixes for POWER5+ pseries (Cedric)
* Updates of documentation (Leonardo and Thomas)
* First step of exception model cleanup (Fabiano)
* User created PHB3/PHB4 devices (Daniel and Cedric)
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Merge remote-tracking branch 'remotes/legoater/tags/pull-ppc-20220112' into staging
ppc 7.0 queue:
* New SLOF for PPC970 and POWER5+ (Alexey)
* Fixes for POWER5+ pseries (Cedric)
* Updates of documentation (Leonardo and Thomas)
* First step of exception model cleanup (Fabiano)
* User created PHB3/PHB4 devices (Daniel and Cedric)
# gpg: Signature made Wed 12 Jan 2022 10:43:21 GMT
# gpg: using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@kaod.org>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: A0F6 6548 F048 95EB FE6B 0B60 51A3 43C7 CFFB ECA1
* remotes/legoater/tags/pull-ppc-20220112: (34 commits)
ppc/pnv: use stack->pci_regs[] in pnv_pec_stk_pci_xscom_write()
ppc/pnv: turn pnv_phb4_update_regions() into static
ppc/pnv: Introduce user creatable pnv-phb4 devices
ppc/pnv: turn 'phb' into a pointer in struct PnvPhb4PecStack
ppc/pnv: move PHB4 XSCOM init to phb4_realize()
ppc/pnv: set phb4 properties in stk_realize()
pnv_phb4_pec: use pnv_phb4_pec_get_phb_id() in pnv_pec_dt_xscom()
pnv_phb4_pec.c: move pnv_pec_phb_offset() to pnv_phb4.c
pnv_phb4.c: change TYPE_PNV_PHB4_ROOT_BUS name
pnv_phb3.h: change TYPE_PNV_PHB3_ROOT_BUS name
ppc/pnv: Move num_phbs under Pnv8Chip
ppc/pnv: Complete user created PHB3 devices
ppc/pnv: Reparent user created PHB3 devices to the PnvChip
ppc/pnv: Introduce support for user created PHB3 devices
pnv_phb4.c: check if root port exists in rc_config functions
pnv_phb4.c: make pnv-phb4-root-port user creatable
ppc/pnv: Attach PHB3 root port device when defaults are enabled
pnv_phb4.c: add unique chassis and slot for pnv_phb4_root_port
pnv_phb3.c: add unique chassis and slot for pnv_phb3_root_port
target/ppc: Set the correct endianness for powernv memory dumps
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reenable util/filemonitor-inotify compilation. Compilation was
disabled when commit a620fbe9ac ("configure: convert compiler tests
to meson, part 5") moved CONFIG_INOTIFY1 from config-host.mak to
config-host.h.
This fixes the usb-mtp device and reenables test-util-filemonitor.
Fixes: a620fbe9ac ("configure: convert compiler tests to meson, part 5")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/800
Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Message-Id: <20220107133514.7785-1-vr_qemu@t-online.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
With more recent versions of Meson, the build.ninja file is more selective
as to what is built by default, and not building the modules results in test
failures.
Mark the modules as built-by-default and, to make the dependencies more
precise, also require them to be up-to-date before running tests.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/801
Tested-by: Li Zhang <lizhang@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If roms/seabios/Makefile is not present, the configure script
is not creating the roms/seabios directory anymore (commit
5dce7b8d8c, "configure: remove DIRS", 2021-12-18); thus, creating
roms/seabios/config.mak fails.
The easiest thing to do is to not create the file, since it will not
be used.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit 812b31d3f9 refactor missed to update this path.
Fixes: 812b31d3f9 ("configs: rename default-configs to configs and reorganise")
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211226001541.3807919-1-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This is unnecessary, because the interrupt would be retrieved and queued
anyway by KVM_GET_VCPU_EVENTS and KVM_SET_VCPU_EVENTS respectively,
and it makes the flow more similar to the one for KVM_GET/SET_SREGS2.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This allows to make PDPTRs part of the migration
stream and thus not reload them after migration which
is against X86 spec.
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20211101132300.192584-2-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This ensures that the file is regenerated properly whenever config-target.h
or config-devices.h files change.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This will be needed as soon as config-poison.h moves from configure to
a meson custom_target (which is built at "ninja" time).
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This makes it easier to identify candidates for moving to Meson.
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Always include the STRIP variable in config-host.mak (it's only used
by the s390-ccw firmware build, and it adds a default if configure
omitted it), and use meson-buildoptions.sh to turn
--enable/--disable-strip into -Dstrip.
The default is now not to strip the binaries like for almost every other
package that has a configure script.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
These files have been removed for more than year in the best
case, or for more than ten years for some really old TCG files.
Remove any traces of it.
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Similar to other optional features, leave the variables empty and compute
the actual value later. Use the existence of include or source directories
to detect whether an OS or CPU supports respectively bsd-user and linux-user.
For now, BSD user-mode emulation is buildable even on TCI-only
architectures. This probably will change once safe signals are
brought over from linux-user.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
--dynamic-list is present on all supported ELF (not Windows or Darwin)
platforms, since it dates back to 2006; -exported_symbols_list is
likewise present on all supported versions of macOS. Do not bother
doing a functional test in configure.
Remove the file creation from configure as well: for Darwin, move the
the creation of the Darwin-formatted symbols to meson; for ELF, use the
file in the source path directly and switch from -Wl, to -Xlinker to
not break weird paths that include a comma.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The handling for the XFS_IOC_DIOINFO ioctl is currently quite excessive:
This is not a "real" feature like the other features that we provide with
the "--enable-xxx" and "--disable-xxx" switches for the configure script,
since this does not influence lots of code (it's only about one call to
xfsctl() in file-posix.c), so people don't gain much with the ability to
disable this with "--disable-xfsctl".
It's also unfortunate that the ioctl will be disabled on Linux in case
the user did not install the right xfsprogs-devel package before running
configure. Thus let's simplify this by providing the ioctl definition
on our own, so we can completely get rid of the header dependency and
thus the related code in the configure script.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20211215125824.250091-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
It is not necessary to have a separate static_library just for common_user
files; using the one that already covers the rest of common_ss is enough
unless you need to reuse some source files between emulators and tests.
Just place common files for all user-mode emulators in common_ss,
similar to what is already done for softmmu_ss in full system emulators.
The only disadvantage is that the include_directories under bsd-user/include/
and linux-user/include/ are now enabled for all targets rather than only
user mode emulators. This however is not different from how include/sysemu/
is available when building user mode emulators.
Tested-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Avoid polluting the compilation of common-user/ with local include files;
making an include file available to common-user/ should be a deliberate
decision in order to keep a clear interface that can be used by both
bsd-user/ and linux-user/.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
pnv_pec_stk_pci_xscom_write() is pnv_pec_stk_pci_xscom_ops write
callback. It writes values into regs in the stack->nest_regs[] array.
The pnv_pec_stk_pci_xscom_read read callback, on the other hand, returns
values of the stack->pci_regs[]. In fact, at this moment, the only use
of stack->pci_regs[] is in pnv_pec_stk_pci_xscom_read(). There's no code
that is written anything in stack->pci_regs[], which is suspicious.
Considering that stack->nest_regs[] is widely used by the nested
MemoryOps pnv_pec_stk_nest_xscom_ops, in both read and write callbacks,
the conclusion is that we're writing the wrong array in
pnv_pec_stk_pci_xscom_write(). This function should write stack->pci_regs[]
instead.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220111200132.633896-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Its only callers are inside pnv_phb4.c.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-6-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This patch introduces pnv-phb4 user creatable devices that are created
in a similar manner as pnv-phb3 devices, allowing the user to interact
with the PHBs directly instead of creating PCI Express Controllers that
will create a certain amount of PHBs per controller index.
We accomplish this by doing the following:
- add a pnv_phb4_get_stack() helper to retrieve which stack an user
created phb4 would occupy;
- when dealing with an user created pnv-phb4 (detected by checking if
phb->stack is NULL at the start of phb4_realize()), retrieve its stack
and initialize its properties as done in stk_realize();
- use 'defaults_enabled()' in stk_realize() to avoid creating and
initializing a 'stack->phb' qdev that might be overwritten by an user
created pnv-phb4 device. This process is wrapped into a new helper
called pnv_pec_stk_default_phb_realize().
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-5-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
At this moment, stack->phb is the plain PnvPHB4 device itself instead of
a pointer to the device. This will present a problem when adding user
creatable devices because we can't deal with this struct and the
realize() callback from the user creatable device.
We can't get rid of this attribute, similar to what we did when enabling
pnv-phb3 user creatable devices, because pnv_phb4_update_regions() needs
to access stack->phb to do its job. This function is called twice in
pnv_pec_stk_update_map(), which is one of the nested xscom write
callbacks (via pnv_pec_stk_nest_xscom_write()). In fact,
pnv_pec_stk_update_map() code comment is explicit about how the order of
the unmap/map operations relates with the PHB subregions.
All of this indicates that this code is tied together in a way that we
either go on a crusade, featuring lots of refactories and redesign and
considerable pain, to decouple stack and phb mapping, or we allow stack
update_map operations to access the associated PHB as it is today even
after introducing pnv-phb4 user devices.
This patch chooses the latter. Instead of getting rid of stack->phb,
turn it into a PHB pointer. This will allow us to assign an user created
PHB to an existing stack later. In this process,
pnv_pec_stk_instance_init() is removed because stack->phb is being
initialized in stk_realize() instead.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-4-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The 'stack->phb_regs_mr' PHB4 passthrough XSCOM initialization relies on
'stack->phb' being not NULL. Moving 'stack->phb_regs_mr' region_init()
and add_subregion() to phb4_realize() time is a natural thing to do
since it's strictly PHB related.
The remaining XSCOM initialization is also related to 'stack->phb' but
in a different manner. For instance, 'stack->nest_regs_mr'
MemoryRegionOps, 'pnv_pec_stk_nest_xscom_ops', uses
pnv_pec_stk_nest_xscom_write() as a write callback. When trying to write
the PEC_NEST_STK_BAR_EN reg, pnv_pec_stk_update_map() is called. Inside
this function, pnv_phb4_update_regions() is called twice. This function
uses 'stack->phb' to manipulate memory regions of the phb.
This is not a problem now but, when enabling user creatable phb4s, a
stack that doesn't have an associated phb (i.e. stack->phb = NULL) it
will cause a SIGINT during boot in pnv_phb4_update_regions().
All this can be avoided if all XSCOM realize is moved to phb4_realize(),
when we have certainty about the existence of 'stack->phb'. A lot of
code was moved from pnv_phb4_pec.c to pnv_phb4.c due to static constant
and variables being used but the cleaner logic is worth the trouble.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-3-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Moving all phb4 properties setup to stk_realize() keeps this logic in
a single place instead of having it scattered between stk_realize() and
pec_realize().
'phb->index' can be retrieved using stack->stack_no and
pnv_phb4_pec_get_phb_id(), deprecating the use of 'phb-id' alias that
was being used for this purpose in pec_realize().
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220111131027.599784-2-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Relying on stack->phb to write the xscom DT of the PEC is something that
we won't be able to do with user creatable pnv-phb4 devices.
Hopefully, this can be done by using pnv_phb4_pec_get_phb_id(), which is
already used by pnv_pec_realize() to set the phb-id of the stack. Use
the same idea in pnv_pec_dt_xscom() to write ibm,phb-index without the
need to accessing stack->phb, since stack->phb is not granted to be !=
NULL when user creatable phbs are introduced.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220110143346.455901-4-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The logic inside pnv_pec_phb_offset() will be useful in the next patch
to determine the stack that should contain a PHB4 device.
Move the function to pnv_phb4.c and make it public since there's no
pnv_phb4_pec.h header. While we're at it, add 'stack_index' as a
parameter and make the function return 'phb-id' directly. And rename it
to pnv_phb4_pec_get_phb_id() to be even clearer about the function
intent.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220110143346.455901-3-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Similar to what was happening with pnv-phb3 buses,
TYPE_PNV_PHB4_ROOT_BUS set to "pnv-phb4-root-bus" is a bit too long for
a default root bus name. The usual default name for theses buses in QEMU
are 'pcie', but we want to make a distinction between pnv-phb4 buses and
other PCIE buses, at least as far as default name goes, because not all
PCIE devices are attachable to a pnv-phb4 root-bus type.
Changing the default to 'pnv-phb4-root' allow us to have a shorter name
while making this bus distinct, and the user can always set its own bus
naming via the "id" attribute anyway.
This is the 'info qtree' output after this change, using a powernv9
domain with 2 sockets and default settings enabled:
qemu-system-ppc64 -m 4G -machine powernv9,accel=tcg \
-smp 2,sockets=2,cores=1,threads=1
dev: pnv-phb4, id ""
index = 5 (0x5)
chip-id = 1 (0x1)
version = 704374636546 (0xa400000002)
device-id = 1217 (0x4c1)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb4-root.11
type pnv-phb4-root
dev: pnv-phb4-root-port, id ""
(...)
dev: pnv-phb4, id ""
index = 0 (0x0)
chip-id = 1 (0x1)
version = 704374636546 (0xa400000002)
device-id = 1217 (0x4c1)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb4-root.6
type pnv-phb4-root
dev: pnv-phb4-root-port, id ""
(..)
dev: pnv-phb4, id ""
index = 5 (0x5)
chip-id = 0 (0x0)
version = 704374636546 (0xa400000002)
device-id = 1217 (0x4c1)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb4-root.5
type pnv-phb4-root
dev: pnv-phb4-root-port, id ""
(...)
dev: pnv-phb4, id ""
index = 0 (0x0)
chip-id = 0 (0x0)
version = 704374636546 (0xa400000002)
device-id = 1217 (0x4c1)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb4-root.0
type pnv-phb4-root
dev: pnv-phb4-root-port, id ""
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220110143346.455901-11-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The TYPE_PNV_PHB3_ROOT_BUS name is used as the default bus name when
the dev has no 'id'. However, pnv-phb3-root-bus is a bit too long to be
used as a bus name.
Most common QEMU buses and PCI controllers are named based on their bus
type (e.g. pSeries spapr-pci-host-bridge is called 'pci'). The most
common name for a PCIE bus controller in QEMU is 'pcie'. Naming it
'pcie' would break the documented use of the pnv-phb3 device, since
'pcie.0' would now refer to the root bus instead of the first root port.
There's nothing particularly wrong with the 'root-bus' name used before,
aside from the fact that 'root-bus' is being used for pnv-phb3 and
pnv-phb4 created buses, which is not quite correct since these buses
aren't implemented the same way in QEMU - you can't plug a
pnv-phb4-root-port into a pnv-phb3 root bus, for example.
This patch renames it as 'pnv-phb3-root', which is a compromise between
the existing and the previously used name. Creating 3 phbs without ID
will result in an "info qtree" output similar to this:
bus: main-system-bus
type System
dev: pnv-phb3, id ""
index = 2 (0x2)
chip-id = 0 (0x0)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb3-root.2
type pnv-phb3-root
(...)
dev: pnv-phb3, id ""
index = 1 (0x1)
chip-id = 0 (0x0)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb3-root.1
type pnv-phb3-root
(...)
dev: pnv-phb3, id ""
index = 0 (0x0)
chip-id = 0 (0x0)
x-config-reg-migration-enabled = true
bypass-iommu = false
bus: pnv-phb3-root.0
type pnv-phb3-root
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20220105212338.49899-11-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
It is not used elsewhere so that's where it belongs.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-10-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
PHB3s ared SysBus devices and should be allowed to be dynamically
created.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-9-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The powernv machine uses the object hierarchy to populate the device
tree and each device should be parented to the chip it belongs to.
This is not the case for user created devices which are parented to
the container "/unattached".
Make sure a PHB3 device is parented to its chip by reparenting the
object if necessary.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-8-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
PHB3 devices and PCI devices can now be added to the powernv8 machine
using :
-device pnv-phb3,chip-id=0,index=1 \
-device nec-usb-xhci,bus=pci.1,addr=0x0
The 'index' property identifies the PHB3 in the chip. In case of user
created devices, a lookup on 'chip-id' is required to assign the
owning chip.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220105212338.49899-7-danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
