Let's leave cpu_init with just generic CPU initialization and
QOM-related functions.
The rest of the SPR registration functions will be moved in the
following patches along with the code that uses them. These are only
the commonly used ones.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-28-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
These will need to be accessed from other files once we move the CPUs
code to separate files.
The check_pow_hid0 and check_pow_hid0_74xx are too specific to be
moved to a header so I'll deal with them later when splitting this
code between the multiple CPU families.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-27-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Put the SPR registration macros in a header that is accessible outside
of cpu_init.c. The following patches will move CPU-specific code to
separate files and will need to access it.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-26-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The following patches will move CPU-specific code into separate files,
so expose the most used SPR registration functions:
register_sdr1_sprs | 22 callers
register_low_BATs | 20 callers
register_non_embedded_sprs | 19 callers
register_high_BATs | 10 callers
register_thrm_sprs | 8 callers
register_usprgh_sprs | 6 callers
register_6xx_7xx_soft_tlb | only 3 callers, but it helps to
keep the soft TLB code consistent.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-25-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Initial intent for the spr_tcg header was to expose the spr_read|write
callbacks that are only used by TCG code. However, although these
routines are TCG-specific, the KVM code needs access to env->sprs
which creation is currently coupled to the callback registration.
We are probably not going to decouple SPR creation and TCG callback
registration any time soon, so let's rename the header to spr_common
to accomodate the register_*_sprs functions that will be moved out of
cpu_init.c in the following patches.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-24-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This function registers just one SPR and has only two callers, so open
code it.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-23-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The important part of this function is that it applies to non-embedded
CPUs, not that it also applies to the 601. We removed support for the
601 anyway, so rename this function.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-22-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The init_proc_755 function is identical to the 745 one except for the
755-specific registers. I think it is worth it to make them share
code.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-21-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
init_proc_603 is defined after init_proc_e300, so I had to move some
code around to make it work.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-19-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This is done to improve init_proc readability and to make subsequent
patches that touch this code a bit cleaner.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-18-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This is done to improve init_proc readability and to make subsequent
patches that touch this code a bit cleaner.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-17-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This is just to have 755-specific registers contained into a function,
intead of leaving them open-coded in init_proc_755. It makes init_proc
easier to read and keeps later patches that touch this code a bit
cleaner.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-16-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The 745 and 755 can share the HID registration, so move it all into
register_755_sprs, which applies for both CPUs.
Also rename that function to register_745_sprs, since the 745 is the
earliest of the two. This will help with separating 755-specific
registers in a subsequent patch.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-14-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Move some of the 440 registers that are being repeated in the 440*
CPUs to register_440_sprs.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-11-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
We're considering these two to be from different CPU families, so
duplicate some code to keep them separate.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-10-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
We're considering these two to be in different CPU families (6xx and
7xx), so keep their SPR registration separate.
The code was copied into register_G2_sprs and the common function was
renamed to apply only to the 755.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-9-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Make sure that every register_*_sprs function only has calls to
spr_register* to register individual SPRs. Do not allow nesting. This
makes the code easier to follow and a look at init_proc_* should
suffice to know what SPRs a CPU has.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-6-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Now that the 601 was removed, all of our CPUs have a timebase, so that
can be moved into the common function.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-5-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The top level init_proc calls register_generic_sprs but also registers
some other SPRs outside of that function. Let's group everything into
a single place.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-4-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The G2LE CPU initialization code is the same as the G2. Use the latter
for both.
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-3-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The /* XXX : not implemented */ comments all over cpu_init are
confusing and ambiguous.
Do they mean not implemented by QEMU, not implemented in a specific
access mode? Not implemented by the CPU? Do they apply to just the
register right after or to a whole block? Do they mean we have an
action to take in the future to implement these? Are they only
informative?
Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20220216162426.1885923-2-farosas@linux.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This implements the Nested KVM HV hcall API for spapr under TCG.
The L2 is switched in when the H_ENTER_NESTED hcall is made, and the
L1 is switched back in returned from the hcall when a HV exception
is sent to the vhyp. Register state is copied in and out according to
the nested KVM HV hcall API specification.
The hdecr timer is started when the L2 is switched in, and it provides
the HDEC / 0x980 return to L1.
The MMU re-uses the bare metal radix 2-level page table walker by
using the get_pate method to point the MMU to the nested partition
table entry. MMU faults due to partition scope errors raise HV
exceptions and accordingly are routed back to the L1.
The MMU does not tag translations for the L1 (direct) vs L2 (nested)
guests, so the TLB is flushed on any L1<->L2 transition (hcall entry
and exit).
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
[ clg: checkpatch fixes ]
Message-Id: <20220216102545.1808018-10-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Introduce virtual hypervisor methods that can support a "Nested KVM HV"
implementation using the bare metal 2-level radix MMU, and using HV
exceptions to return from H_ENTER_NESTED (rather than cause interrupts).
HV exceptions can now be raised in the TCG spapr machine when running a
nested KVM HV guest. The main ones are the lev==1 syscall, the hdecr,
hdsi and hisi, hv fu, and hv emu, and h_virt external interrupts.
HV exceptions are intercepted in the exception handler code and instead
of causing interrupts in the guest and switching the machine to HV mode,
they go to the vhyp where it may exit the H_ENTER_NESTED hcall with the
interrupt vector numer as return value as required by the hcall API.
Address translation is provided by the 2-level page table walker that is
implemented for the bare metal radix MMU. The partition scope page table
is pointed to the L1's partition scope by the get_pate vhc method.
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20220216102545.1808018-9-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
This moves the logic to reset the QEMU exception state into its own
function.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[ clg: checkpatch fixes ]
Message-Id: <20220216102545.1808018-8-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The virtual hypervisor currently always intercepts and handles
hypercalls but with a future change this will not always be the case.
Add a helper for the test so the logic is abstracted from the mechanism.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20220216102545.1808018-7-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
In prepartion for implementing a full partition table option for
vhyp, update the get_pate method to take an lpid and return a
success/fail indicator.
The spapr implementation currently just asserts lpid is always 0
and always return success.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[ clg: checkpatch fixes ]
Message-Id: <20220216102545.1808018-6-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The radix on vhyp MMU uses a single-level radix table walk, with the
partition scope mapping provided by the flat QEMU machine memory.
A subsequent change will use the two-level radix walk on vhyp in some
situations, so provide a helper which can abstract that logic.
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20220216102545.1808018-5-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Machines which don't emulate the HDEC facility are able to use the
timer for something else. Provide functions to start and stop the
hdecr timer.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[ clg: checkpatch fixes ]
Message-Id: <20220216102545.1808018-4-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The spapr virtual hypervisor does not require the hdecr timer.
Remove it.
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Message-Id: <20220216102545.1808018-3-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Invalid or missing partition table entry exceptions should cause HV
interrupts. HDSISR is set to bad MMU config, which is consistent with
the ISA and experimentally matches what POWER9 generates.
Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[ clg: checkpatch fixes ]
Message-Id: <20220216102545.1808018-2-npiggin@gmail.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
If the device backend is not persistent memory for the nvdimm, there is
need for explicit IO flushes on the backend to ensure persistence.
On SPAPR, the issue is addressed by adding a new hcall to request for
an explicit flush from the guest when the backend is not pmem. So, the
approach here is to convey when the hcall flush is required in a device
tree property. The guest once it knows the device backend is not pmem,
makes the hcall whenever flush is required.
To set the device tree property, a new PAPR specific device type inheriting
the nvdimm device is implemented. When the backend doesn't have pmem=on
the device tree property "ibm,hcall-flush-required" is set, and the guest
makes hcall H_SCM_FLUSH requesting for an explicit flush. The new device
has boolean property pmem-override which when "on" advertises the device
tree property even when pmem=on for the backend. The flush function
invokes the fdatasync or pmem_persist() based on the type of backend.
The vmstate structures are made part of the spapr-nvdimm device object.
The patch attempts to keep the migration compatibility between source and
destination while rejecting the incompatibles ones with failures.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <164396256092.109112.17933240273840803354.stgit@ltczzess4.aus.stglabs.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
The patch adds support for the SCM flush hcall for the nvdimm devices.
To be available for exploitation by guest through the next patch. The
hcall is applicable only for new SPAPR specific device class which is
also introduced in this patch.
The hcall expects the semantics such that the flush to return with
H_LONG_BUSY_ORDER_10_MSEC when the operation is expected to take longer
time along with a continue_token. The hcall to be called again by providing
the continue_token to get the status. So, all fresh requests are put into
a 'pending' list and flush worker is submitted to the thread pool. The
thread pool completion callbacks move the requests to 'completed' list,
which are cleaned up after collecting the return status for the guest
in subsequent hcall from the guest.
The semantics makes it necessary to preserve the continue_tokens and
their return status across migrations. So, the completed flush states
are forwarded to the destination and the pending ones are restarted
at the destination in post_load. The necessary nvdimm flush specific
vmstate structures are also introduced in this patch which are to be
saved in the new SPAPR specific nvdimm device to be introduced in the
following patch.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <164396254862.109112.16675611182159105748.stgit@ltczzess4.aus.stglabs.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
A new subclass inheriting NVDIMMDevice is going to be introduced in
subsequent patches. The new subclass uses the realize and unrealize
callbacks. Add them on NVDIMMClass to appropriately call them as part
of plug-unplug.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Acked-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <164396253158.109112.1926755104259023743.stgit@ltczzess4.aus.stglabs.ibm.com>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
* Remove old Ibex PLIC header file
* Allow writing 8 bytes with generic loader
* Fixes for RV128
* Refactor RISC-V CPU configs
* Initial support for XVentanaCondOps custom extension
* Fix for vill field in vtype
* Fix trap cause for RV32 HS-mode CSR access from RV64 HS-mode
* Support for svnapot, svinval and svpbmt extensions
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Merge remote-tracking branch 'remotes/alistair/tags/pull-riscv-to-apply-20220216' into staging
Fourth RISC-V PR for QEMU 7.0
* Remove old Ibex PLIC header file
* Allow writing 8 bytes with generic loader
* Fixes for RV128
* Refactor RISC-V CPU configs
* Initial support for XVentanaCondOps custom extension
* Fix for vill field in vtype
* Fix trap cause for RV32 HS-mode CSR access from RV64 HS-mode
* Support for svnapot, svinval and svpbmt extensions
# gpg: Signature made Wed 16 Feb 2022 06:24:52 GMT
# gpg: using RSA key F6C4AC46D4934868D3B8CE8F21E10D29DF977054
# gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [full]
# Primary key fingerprint: F6C4 AC46 D493 4868 D3B8 CE8F 21E1 0D29 DF97 7054
* remotes/alistair/tags/pull-riscv-to-apply-20220216: (35 commits)
docs/system: riscv: Update description of CPU
target/riscv: add support for svpbmt extension
target/riscv: add support for svinval extension
target/riscv: add support for svnapot extension
target/riscv: add PTE_A/PTE_D/PTE_U bits check for inner PTE
target/riscv: Ignore reserved bits in PTE for RV64
hw/intc: Add RISC-V AIA APLIC device emulation
target/riscv: Allow users to force enable AIA CSRs in HART
hw/riscv: virt: Use AIA INTC compatible string when available
target/riscv: Implement AIA IMSIC interface CSRs
target/riscv: Implement AIA xiselect and xireg CSRs
target/riscv: Implement AIA mtopi, stopi, and vstopi CSRs
target/riscv: Implement AIA interrupt filtering CSRs
target/riscv: Implement AIA hvictl and hviprioX CSRs
target/riscv: Implement AIA CSRs for 64 local interrupts on RV32
target/riscv: Implement AIA local interrupt priorities
target/riscv: Allow AIA device emulation to set ireg rmw callback
target/riscv: Add defines for AIA CSRs
target/riscv: Add AIA cpu feature
target/riscv: Allow setting CPU feature from machine/device emulation
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Since the hypervisor extension been non experimental and enabled for
default CPU, the previous command is no longer available and the
option `x-h=true` or `h=true` is also no longer required.
Signed-off-by: Yu Li <liyu.yukiteru@bytedance.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <9040401e-8f87-ef4a-d840-6703f08d068c@bytedance.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
- add PTE_PBMT bits: It uses two PTE bits, but otherwise has no effect on QEMU, since QEMU is sequentially consistent and doesn't model PMAs currently
- add PTE_PBMT bit check for inner PTE
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-6-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
- sinval.vma, hinval.vvma and hinval.gvma do the same as sfence.vma, hfence.vvma and hfence.gvma except extension check
- do nothing other than extension check for sfence.w.inval and sfence.inval.ir
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-5-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
- add PTE_N bit
- add PTE_N bit check for inner PTE
- update address translation to support 64KiB continuous region (napot_bits = 4)
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-4-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
For non-leaf PTEs, the D, A, and U bits are reserved for future standard use.
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-3-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Highest bits of PTE has been used for svpbmt, ref: [1], [2], so we
need to ignore them. They cannot be a part of ppn.
1: The RISC-V Instruction Set Manual, Volume II: Privileged Architecture
4.4 Sv39: Page-Based 39-bit Virtual-Memory System
4.5 Sv48: Page-Based 48-bit Virtual-Memory System
2: https://github.com/riscv/virtual-memory/blob/main/specs/663-Svpbmt-diff.pdf
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Liu Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Cc: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220204022658.18097-2-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The RISC-V AIA (Advanced Interrupt Architecture) defines a new
interrupt controller for wired interrupts called APLIC (Advanced
Platform Level Interrupt Controller). The APLIC is capabable of
forwarding wired interupts to RISC-V HARTs directly or as MSIs
(Message Signaled Interupts).
This patch adds device emulation for RISC-V AIA APLIC.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20220204174700.534953-19-anup@brainfault.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
We add "x-aia" command-line option for RISC-V HART using which
allows users to force enable CPU AIA CSRs without changing the
interrupt controller available in RISC-V machine.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20220204174700.534953-18-anup@brainfault.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
We should use the AIA INTC compatible string in the CPU INTC
DT nodes when the CPUs support AIA feature. This will allow
Linux INTC driver to use AIA local interrupt CSRs.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20220204174700.534953-17-anup@brainfault.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The AIA specification defines IMSIC interface CSRs for easy access
to the per-HART IMSIC registers without using indirect xiselect and
xireg CSRs. This patch implements the AIA IMSIC interface CSRs.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20220204174700.534953-16-anup@brainfault.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Fabiano Rosas
Nicholas Piggin
Shivaprasad G Bhat
Peter Maydell
Yu Li
Weiwei Li
Guo Ren
Anup Patel