Currently armv7m_load_kernel() takes the size of the block of memory
where it should load the initial guest image, but assumes that it
should always load it at address 0. This happens to be true of all
our M-profile boards at the moment, but it isn't guaranteed to always
be so: M-profile CPUs can be configured (via init-svtor and
init-nsvtor, which match equivalent hardware configuration signals)
to have the initial vector table at any address, not just zero. (For
instance the Teeny board has the boot ROM at address 0x0200_0000.)
Add a base address argument to armv7m_load_kernel(), so that
callers now pass in both base address and size. All the current
callers pass 0, so this is not a behaviour change.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220823160417.3858216-3-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Currently our semihosting implementations generally prohibit use of
semihosting calls in system emulation from the guest userspace. This
is a very long standing behaviour justified originally "to provide
some semblance of security" (since code with access to the
semihosting ABI can do things like read and write arbitrary files on
the host system). However, it is sometimes useful to be able to run
trusted guest code which performs semihosting calls from guest
userspace, notably for test code. Add a command line suboption to
the existing semihosting-config option group so that you can
explicitly opt in to semihosting from guest userspace with
-semihosting-config userspace=on
(There is no equivalent option for the user-mode emulator, because
there by definition all code runs in userspace and has access to
semihosting already.)
This commit adds the infrastructure for the command line option and
adds a bool 'is_user' parameter to the function
semihosting_userspace_enabled() that target code can use to check
whether it should be permitting the semihosting call for userspace.
It mechanically makes all the callsites pass 'false', so they
continue checking "is semihosting enabled in general". Subsequent
commits will make each target that implements semihosting honour the
userspace=on option by passing the correct value and removing
whatever "don't do this for userspace" checking they were doing by
hand.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220822141230.3658237-2-peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Historically, The mtime/mtimecmp has been part of the CPU because
they are per hart entities. However, they actually belong to aclint
which is a MMIO device.
Move them to the ACLINT device. This also emulates the real hardware
more closely.
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Message-Id: <20220824221357.41070-2-atishp@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
When optional AIA PLIC support was added the to the virt machine, the
address cells property was removed leading the issues with dt-validate
on a dump from the virt machine:
/stuff/qemu/qemu.dtb: plic@c000000: '#address-cells' is a required property
From schema: /stuff/linux/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
Add back the property to suppress the warning.
Reported-by: Rob Herring <robh@kernel.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Message-id: 20220810184612.157317-3-mail@conchuod.ie
Link: https://lore.kernel.org/linux-riscv/20220803170552.GA2250266-robh@kernel.org/
Fixes: e6faee6585 ("hw/riscv: virt: Add optional AIA APLIC support to virt machine")
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Booting using "Direct Kernel Boot" for PolarFire SoC & skipping u-boot
entirely is probably not advisable, but it does at least show signs of
life. Recent Linux kernel versions make use of peripherals that are
missing definitions in QEMU and lead to kernel panics. These issues
almost certain rear their head for other methods of booting, but I was
unable to figure out a suitable HSS version that is recent enough to
support these peripherals & works with QEMU.
With these peripherals added, booting a kernel with the following hangs
hangs waiting for the system controller's hwrng, but the kernel no
longer panics. With the Linux driver for hwrng disabled, it boots to
console.
qemu-system-riscv64 -M microchip-icicle-kit \
-m 2G -smp 5 \
-kernel $(vmlinux_bin) \
-dtb $(dtb)\
-initrd $(initramfs) \
-display none -serial null \
-serial stdio
More peripherals are added than strictly required to fix the panics in
the hopes of avoiding a replication of this problem in the future.
Some of the peripherals which are in the device tree for recent kernels
are implemented in the FPGA fabric. The eMMC/SD mux, which exists as
an unimplemented device is replaced by a wider entry. This updated
entry covers both the mux & the remainder of the FPGA fabric connected
to the MSS using Fabric Interrconnect (FIC) 3.
Link: https://github.com/polarfire-soc/icicle-kit-reference-design#fabric-memory-map
Link: https://ww1.microchip.com/downloads/aemDocuments/documents/FPGA/ProductDocuments/SupportingCollateral/V1_4_Register_Map.zip
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220813135127.2971754-1-mail@conchuod.ie>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The following patch updates opentitan to match the new configuration,
as per, lowRISC/opentitan@217a0168ba
Note: with this patch we now skip the usage of the opentitan
`boot_rom`. The Opentitan boot rom contains hw verification
for devies which we are currently not supporting in qemu. As of now,
the `boot_rom` has no major significance, however, would be good to
support in the future.
Tested by running utests from the latest tock [1]
(that supports this version of OT).
[1] https://github.com/tock/tock/pull/3056
Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220812005229.358850-1-wilfred.mallawa@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The 'fdt' param is not being used in riscv_setup_rom_reset_vec().
Simplify the API by removing it. While we're at it, remove the redundant
'return' statement at the end of function.
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Alistair Francis <alistair.francis@wdc.com>
Cc: Bin Meng <bin.meng@windriver.com>
Cc: Vijai Kumar K <vijai@behindbytes.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220728181926.2123771-1-danielhb413@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Cache the translation from guest to host address, so we may
use direct loads when we hit on the primary translation page.
Look up the second translation page only once, during translation.
This obviates another lookup of the second page within tb_gen_code
after translation.
Fixes a bug in that plugin_insn_append should be passed the bytes
in the original memory order, not bswapped by pieces.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Pass these along to translator_loop -- pc may be used instead
of tb->pc, and host_pc is currently unused. Adjust all targets
at one time.
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The only user can easily use translator_lduw and
adjust the type to signed during the return.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The base qemu_ram_addr_from_host function is already in
softmmu/physmem.c; move the nofail version to be adjacent.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The function is not used outside of cpu-exec.c. Move it and
its subroutines up in the file, before the first use.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The current implementation is a no-op, simply returning addr.
This is incorrect, because we ought to be checking the page
permissions for execution.
Make get_page_addr_code inline for both implementations.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Introduce a function that checks whether a given address is on the same
page as where disassembly started. Having it improves readability of
the following patches.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20220811095534.241224-3-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[rth: Make the DisasContextBase parameter const.]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Map the stack executable if required by default or on demand.
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Tested-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Add a new property "big-endian" to allow configuring the RTC as either
little or big endian, the default is little endian.
Currently overriding the default to big endian is only used by the m68k
virt platform. New platforms should prefer to use little endian and not
set this.
Cc: Laurent Vivier <lvivier@redhat.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
These will be shared with the virt platform.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>
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Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging
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# Primary key fingerprint: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211
* tag 'net-pull-request' of https://github.com/jasowang/qemu: (21 commits)
net: tulip: Restrict DMA engine to memories
net/colo.c: Fix the pointer issue reported by Coverity.
vdpa: Delete CVQ migration blocker
vdpa: Add virtio-net mac address via CVQ at start
vhost_net: add NetClientState->load() callback
vdpa: extract vhost_vdpa_net_cvq_add from vhost_vdpa_net_handle_ctrl_avail
vdpa: Move command buffers map to start of net device
vdpa: add net_vhost_vdpa_cvq_info NetClientInfo
vhost_net: Add NetClientInfo stop callback
vhost_net: Add NetClientInfo start callback
vhost: Do not depend on !NULL VirtQueueElement on vhost_svq_flush
vhost: Delete useless read memory barrier
vhost: use SVQ element ndescs instead of opaque data for desc validation
vhost: stop transfer elem ownership in vhost_handle_guest_kick
vdpa: Use ring hwaddr at vhost_vdpa_svq_unmap_ring
vhost: Always store new kick fd on vhost_svq_set_svq_kick_fd
vdpa: Make SVQ vring unmapping return void
vdpa: Remove SVQ vring from iova_tree at shutdown
util: accept iova_tree_remove_parameter by value
vdpa: do not save failed dma maps in SVQ iova tree
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Support for the unix socket has existed both in BSD and Linux for the
longest time, but not on Windows. Since Windows 10 build 17063 [1],
the native support for the unix socket has come to Windows. Starting
this build, two Win32 processes can use the AF_UNIX address family
over Winsock API to communicate with each other.
[1] https://devblogs.microsoft.com/commandline/af_unix-comes-to-windows/
Signed-off-by: Xuzhou Cheng <xuzhou.cheng@windriver.com>
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220802075200.907360-3-bmeng.cn@gmail.com>
We can restore the device state in the destination via CVQ now. Remove
the migration blocker.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
It allows per-net client operations right after device's successful
start. In particular, to load the device status.
Vhost-vdpa net will use it to add the CVQ buffers to restore the device
status.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Used by the backend to perform actions after the device is stopped.
In particular, vdpa net use it to unmap CVQ buffers to the device,
cleaning the actions performed in prepare().
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This is used by the backend to perform actions before the device is
started.
In particular, vdpa net use it to map CVQ buffers to the device, so it
can send control commands using them.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
It's convenient to call iova_tree_remove from a map returned from
iova_tree_find or iova_tree_find_iova. With the current code this is not
possible, since we will free it, and then we will try to search for it
again.
Fix it making accepting the map by value, forcing a copy of the
argument. Not applying a fixes tag, since there is no use like that at
the moment.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
In the first 7.2 queue we have changes in the powernv pnv-phb handling,
the start of the QOMification of the ppc405 model, the removal of the
taihu machine, a new SLOF image and others.
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Merge tag 'pull-ppc-20220831' of https://gitlab.com/danielhb/qemu into staging
ppc patch queue for 2022-08-31:
In the first 7.2 queue we have changes in the powernv pnv-phb handling,
the start of the QOMification of the ppc405 model, the removal of the
taihu machine, a new SLOF image and others.
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# gpg: Signature made Wed 31 Aug 2022 16:09:58 EDT
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# gpg: Good signature from "Daniel Henrique Barboza <danielhb413@gmail.com>" [unknown]
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* tag 'pull-ppc-20220831' of https://gitlab.com/danielhb/qemu: (60 commits)
ppc4xx: Fix code style problems reported by checkpatch
ppc/ppc4xx: Fix sdram trace events
hw/ppc/Kconfig: Move imply before select
hw/ppc/sam460ex: Remove PPC405 dependency from sam460ex
ppc405: Move machine specific code to ppc405_boards.c
ppc/ppc405: QOM'ify FPGA
ppc/ppc405: Use an explicit I2C object
hw/intc/ppc-uic: Convert ppc-uic to a PPC4xx DCR device
ppc/ppc405: Use an embedded PPCUIC model in SoC state
ppc4xx: Rename ppc405-ebc to ppc4xx-ebc
ppc4xx: Move EBC model to ppc4xx_devs.c
ppc4xx: Rename ppc405-plb to ppc4xx-plb
ppc4xx: Move PLB model to ppc4xx_devs.c
ppc/ppc405: QOM'ify MAL
ppc/ppc405: QOM'ify PLB
ppc/ppc405: QOM'ify POB
ppc/ppc405: QOM'ify OPBA
ppc/ppc405: QOM'ify EBC
ppc/ppc405: QOM'ify DMA
ppc/ppc405: QOM'ify GPIO
...
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
When a SCSI command is received from the guest, the CDB length implied
by the first byte might exceed the number of bytes the guest sent. In
this case scsi_req_new() will read uninitialized data, causing
unpredictable behavior.
Adds the buf_len parameter to scsi_req_new() and plumbs it through the
call stack.
Signed-off-by: John Millikin <john@john-millikin.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1127
Message-Id: <20220817053458.698416-1-john@john-millikin.com>
[Fill in correct length for adapters other than ESP. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Make ppc-uic a subclass of ppc4xx-dcr-device which will handle the cpu
link and make it uniform with the other PPC4xx devices.
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <eb548130cf60aea8a6ea4dba4dee1686b3cabc3d.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This device is shared between different 4xx socs.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <63d9b14c8ff5f73e35bffca1036394b5235735ee.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The EBC is shared between 405 and 440 so move it to shared file.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <10eae70509ca4bd74858fc2c0a0f0e4eb9330199.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This device is shared between different 4xx socs.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <5b13ebfd12a71a28035bed5a915cbeee81cf21d1.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The PLB is shared between 405 and 440 so move it to the shared file.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <2498384bf3e18959ee8cb984d72fb66b8a6ecadc.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The Memory Access Layer (MAL) controller is currently modeled as a DCR
device with 4 IRQs. Also drop the ppc4xx_mal_init() helper and adapt
the sam460ex machine.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[balaton: ppc4xx_dcr_register changes, add finalize method]
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <d54a243dff94d95ba30dbcc09c27700a90ade932.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
The Device Control Registers (DCR) of on-SoC devices are accessed by
software through the use of the mtdcr and mfdcr instructions. These
are converted in transactions on a side band bus, the DCR bus, which
connects the on-SoC devices to the CPU.
Ideally, we should model these accesses with a DCR namespace and DCR
memory regions but today the DCR handlers are installed in a DCR table
under the CPU. Instead, introduce a little device model wrapper to hold
a CPU link and handle registration of DCR handlers.
The DCR device inherits from SysBus because most of these devices also
have MMIO regions and/or IRQs. Being a SysBusDevice makes things easier
to install the device model in the overall SoC.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
[balaton: Explicit opaque parameter for dcr callbacks]
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <9b21bdf55e0a728f093bad299e030d98f302ded0.1660746880.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Drop the use of ppc4xx_init() and duplicate a bit of code related to
clocks in the SoC realize routine. We will clean that up in the
following patches.
ppc_dcr_init() simply allocates default DCR handlers for the CPU. Maybe
this could be done in model initializer of the CPU families needing it.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <20220809153904.485018-8-clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
When enabling user created PHBs (a change reverted by commit 9c10d86fee)
we were handling PHBs created by default versus by the user in different
manners. The only difference between these PHBs is that one will have a
valid phb3->chip that is assigned during pnv_chip_power8_realize(),
while the user created needs to search which chip it belongs to.
Aside from that there shouldn't be any difference. Making the default
PHBs behave in line with the user created ones will make it easier to
re-introduce them later on. It will also make the code easier to follow
since we are dealing with them in equal manner.
The first step is to turn chip8->phbs[] into a PnvPHB3 pointer array.
This will allow us to assign user created PHBs into it later on. The way
we initilize the default case is now more in line with that would happen
with the user created case: the object is created, parented by the chip
because pnv_xscom_dt() relies on it, and then assigned to the array.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-6-danielhb413@gmail.com>
pnv_parent_qom_fixup() and pnv_parent_bus_fixup() are versions of the
helpers that were reverted by commit 9c10d86fee "ppc/pnv: Remove
user-created PHB{3,4,5} devices". They are needed to amend the QOM and
bus hierarchies of user created pnv-phbs, matching them with default
pnv-phbs.
A new helper pnv_phb_user_device_init() is created to handle
user-created devices setup. We're going to call it inside
pnv_phb_realize() in case we're realizing an user created device. This
will centralize all user device realated in a single spot, leaving the
realize functions of the phb3/phb4 backends untouched.
Another helper called pnv_chip_add_phb() was added to handle the
particularities of each chip version when adding a new PHB.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-5-danielhb413@gmail.com>
The same rationale provided in the PHB3 bus case applies here.
Note: we could have merged both buses in a single object, like we did
with the root ports, and spare some boilerplate. The reason we opted to
preserve both buses objects is twofold:
- there's not user side advantage in doing so. Unifying the root ports
presents a clear user QOL change when we enable user created devices back.
The buses objects, aside from having a different QOM name, is transparent
to the user;
- we leave a door opened in case we want to increase the root port limit
for phb4/5 later on without having to deal with phb3 code.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-3-danielhb413@gmail.com>
We rely on the phb-id and chip-id, which are PHB properties, to assign
chassis and slot to the root port. For default devices this is no big
deal: the root port is being created under pnv_phb_realize() and the
values are being passed on via the 'index' and 'chip-id' of the
pnv_phb_attach_root_port() helper.
If we want to implement user created root ports we have a problem. The
user created root port will not be aware of which PHB it belongs to,
unless we're willing to violate QOM best practices and access the PHB
via dev->parent_bus->parent. What we can do is to access the root bus
parent bus.
Since we're already assigning the root port as QOM child of the bus, and
the bus is initiated using PHB properties, let's add phb-id and chip-id
as properties of the bus. This will allow us trivial access to them, for
both user-created and default root ports, without doing anything too
shady with QOM.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220811163950.578927-2-danielhb413@gmail.com>
The helper is only used in this file.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-13-danielhb413@gmail.com>
The attribute is unused.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-11-danielhb413@gmail.com>
We support only a single root port, PNV_PHB_ROOT_PORT.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-10-danielhb413@gmail.com>
The unified pnv-phb-root-port can be used instead. The phb4-root-port
device isn't exposed to the user in any official QEMU release so there's
no ABI breakage in removing it.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-9-danielhb413@gmail.com>
The unified pnv-phb-root-port can be used in its place. There is no ABI
breakage in doing so because no official QEMU release introduced user
creatable pnv-phb3-root-port devices.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-8-danielhb413@gmail.com>
Change the parent type of the PnvPHB4 device to TYPE_PARENT since the
PCI bus is going to be initialized by the PnvPHB parent. Functions that
needs to access the bus via a PnvPHB4 object can do so via the
phb4->phb_base pointer.
pnv_phb4_pec now creates a PnvPHB object.
The powernv9 machine class will create PnvPHB devices with version '4'.
powernv10 will create using version '5'. Both are using global machine
properties in their class_init() to do that.
These changes will benefit us when adding PnvPHB user creatable devices
for powernv9 and powernv10.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-6-danielhb413@gmail.com>
Similar to what we already did for the PnvPHB3 device, let's add a
helper to init the bus when using a PnvPHB4. This helper will be used by
PnvPHb when PnvPHB4 turns into a backend.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-5-danielhb413@gmail.com>
We need a handful of changes that needs to be done in a single swoop to
turn PnvPHB3 into a PnvPHB backend.
In the PnvPHB3, since the PnvPHB device implements PCIExpressHost and
will hold the PCI bus, change PnvPHB3 parent to TYPE_DEVICE. There are a
couple of instances in pnv_phb3.c that needs to access the PCI bus, so a
phb_base pointer is added to allow access to the parent PnvPHB. The
PnvPHB3 root port will now be connected to a PnvPHB object.
In pnv.c, the powernv8 machine chip8 will now hold an array of PnvPHB
objects. pnv_get_phb3_child() needs to be adapted to return the PnvPHB3
backend from the PnvPHB child. A global property is added in
pnv_machine_power8_class_init() to ensure that all PnvPHBs are created
with phb->version = 3.
After all these changes we're still able to boot a powernv8 machine with
default settings. The real gain will come with user created PnvPHB
devices, coming up next.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-4-danielhb413@gmail.com>
