There's no need to have a gigantic if in there let's move the elf
32/64 bit logic into the section, segment or note code.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-9-frankja@linux.ibm.com>
There's no need to have two write functions. Let's rather have two
functions that set the data for elf 32/64 and then write it in a
common function.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-8-frankja@linux.ibm.com>
Checking d_class in dump_info leads to lengthy conditionals so let's
shorten things a bit by introducing a helper function.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-7-frankja@linux.ibm.com>
Offset calculations are easy enough to get wrong. Let's add a few
variables to make moving around elf headers and data sections easier.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220330123603.107120-6-frankja@linux.ibm.com>
When s->shdr_num is 0 we'll add 0 bytes of section headers which is
equivalent to not adding section headers but with the multiplication
we can remove a if/else.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-5-frankja@linux.ibm.com>
Let's move from a boolean to a int variable which will later enable us
to store the number of sections that are in the dump file.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-4-frankja@linux.ibm.com>
There's no need to have phdr_num and sh_info at the same time. We can
make phdr_num 32 bit and set PN_XNUM when we write the header if
phdr_num >= PN_XNUM.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220407094824.5074-1-frankja@linux.ibm.com>
Let's move to the new way of handling errors before changing the dump
code. This patch has mostly been generated by the coccinelle script
scripts/coccinelle/errp-guard.cocci.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-2-frankja@linux.ibm.com>
The GICv4 ITS VMOVP command's semantics require it to perform the
operation on every ITS connected to the same GIC that the ITS that
received the command is attached to. This means that the GIC object
needs to keep a pointer to every ITS that is connected to it
(previously it was sufficient for the ITS to have a pointer to its
GIC).
Add a glib ptrarray to the GICv3 object which holds pointers to every
connected ITS, and make the ITS add itself to the array for the GIC
it is connected to when it is realized.
Note that currently all QEMU machine types with an ITS have exactly
one ITS in the system, so typically the length of this ptrarray will
be 1. Multiple ITSes are typically used to improve performance on
real hardware, so we wouldn't need to have more than one unless we
were modelling a real machine type that had multile ITSes.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[PMM: Moved gicv3_add_its() to arm_gicv3_its_common.h to avoid
compilation error building the KVM ITS]
Message-id: 20220408141550.1271295-16-peter.maydell@linaro.org
For GICv4, interrupt table entries read by process_its_cmd() may
indicate virtual LPIs which are to be directly injected into a VM.
Implement the ITS side of the code for handling this. This is
similar to the existing handling of physical LPIs, but instead of
looking up a collection ID in a collection table, we look up a vPEID
in a vPE table. As with the physical LPIs, we leave the rest of the
work to code in the redistributor device.
The redistributor half will be implemented in a later commit;
for now we just provide a stub function which does nothing.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-15-peter.maydell@linaro.org
Split the part of process_its_cmd() which is specific to physical
interrupts into its own function. This is the part which starts by
taking the ICID and looking it up in the collection table. The
handling of virtual interrupts is significantly different (involving
a lookup in the vPE table) so structuring the code with one
sub-function for the physical interrupt case and one for the virtual
interrupt case will be clearer than putting both cases in one large
function.
The code for handling the "remove mapping from ITE" for the DISCARD
command remains in process_its_cmd() because it is common to both
virtual and physical interrupts.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-14-peter.maydell@linaro.org
Factor out the sequence of looking up a CTE from an ICID including
the validity and error checks.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-13-peter.maydell@linaro.org
The operation of finding an interrupt table entry given a (DeviceID,
EventID) pair is necessary in multiple different ITS commands. The
process requires first using the DeviceID as an index into the device
table to find the DTE, and then useng the EventID as an index into
the interrupt table specified by that DTE to find the ITE. We also
need to handle all the possible error cases: indexes out of range,
table memory not readable, table entries not valid.
Factor this out into a separate lookup_ite() function which we
can then call from the places where we were previously open-coding
this sequence. We'll also need this for some of the new GICv4.0
commands.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-12-peter.maydell@linaro.org
In the ItsCmdResult enum, we currently distinguish only CMD_STALL
(failure, stall processing of the command queue) and CMD_CONTINUE
(keep processing the queue), and we use the latter both for "there
was a parameter error, go on to the next command" and "the command
succeeded, go on to the next command". Sometimes we would like to
distinguish those two cases, so add CMD_CONTINUE_OK to the enum to
represent the success situation, and use it in the relevant places.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-11-peter.maydell@linaro.org
Implement the GICv4 VMAPP command, which writes an entry to the vPE
table.
For GICv4.1 this command has extra fields in the command packet
and additional behaviour. We define the 4.1-only fields with the
FIELD macro, but only implement the GICv4.0 version of the command.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-10-peter.maydell@linaro.org
Implement the GICv4 VMAPI and VMAPTI commands. These write
an interrupt translation table entry that maps (DeviceID,EventID)
to (vPEID,vINTID,doorbell). The only difference between VMAPI
and VMAPTI is that VMAPI assumes vINTID == EventID rather than
both being specified in the command packet.
(This code won't be reachable until we allow the GIC version to be
set to 4. Support for reading this new virtual-interrupt DTE and
handling it correctly will be implemented in a later commit.)
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-9-peter.maydell@linaro.org
The GICv4 defines a new in-guest-memory table for the ITS: this is
the vPE table. Implement the new GITS_BASER2 register which the
guest uses to tell the ITS where the vPE table is located, including
the decode of the register fields into the TableDesc structure which
we do for the GITS_BASER<n> when the guest enables the ITS.
We guard provision of the new register with the its_feature_virtual()
function, which does a check of the GITS_TYPER.Virtual bit which
indicates presence of ITS support for virtual LPIs. Since this bit
is currently always zero, GICv4-specific features will not be
accessible to the guest yet.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-8-peter.maydell@linaro.org
In process_mapti() we check interrupt IDs to see whether they are
in the valid LPI range. Factor this out into its own utility
function, as we're going to want it elsewhere too for GICv4.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-7-peter.maydell@linaro.org
In a GICv3, it is impossible for the GIC to deliver a VIRQ or VFIQ to
the CPU unless the CPU has EL2, because VIRQ and VFIQ are only
configurable via EL2-only system registers. Moreover, in our
implementation we were only calculating and updating the state of the
VIRQ and VFIQ lines in gicv3_cpuif_virt_irq_fiq_update() when those
EL2 system registers changed. We were therefore able to assert in
arm_cpu_set_irq() that we didn't see a VIRQ or VFIQ line update if
EL2 wasn't present.
This assumption no longer holds with GICv4:
* even if the CPU does not have EL2 the guest is able to cause the
GIC to deliver a virtual LPI by programming the ITS (which is a
silly thing for it to do, but possible)
* because we now need to recalculate the state of the VIRQ and VFIQ
lines in more cases than just "some EL2 GIC sysreg was written",
we will see calls to arm_cpu_set_irq() for "VIRQ is 0, VFIQ is 0"
even if the guest is not using the virtual LPI parts of the ITS
Remove the assertions, and instead simply ignore the state of the
VIRQ and VFIQ lines if the CPU does not have EL2.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-6-peter.maydell@linaro.org
We use the common function gicv3_idreg() to supply the CoreSight ID
register values for the GICv3 for the copies of these ID registers in
the distributor, redistributor and ITS register frames. This isn't
quite correct, because while most of the register values are the
same, the PIDR0 value should vary to indicate which of these three
frames it is. (You can see this and also the correct values of these
PIDR0 registers by looking at the GIC-600 or GIC-700 TRMs, for
example.)
Make gicv3_idreg() take an extra argument for the PIDR0 value.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-5-peter.maydell@linaro.org
Boards using the GICv3 need to configure it with both the total
number of CPUs and also the sizes of all the memory regions which
contain redistributors (one redistributor per CPU). At the moment
the GICv3 checks that the number of CPUs specified is not too many to
fit in the defined redistributor regions, but in fact the code
assumes that the two match exactly. For instance when we set the
GICR_TYPER.Last bit on the final redistributor in each region, we
assume that we don't need to consider the possibility of a region
being only half full of redistributors or even completely empty. We
also assume in gicv3_redist_read() and gicv3_redist_write() that we
can calculate the CPU index from the offset within the MemoryRegion
and that this will always be in range.
Fortunately all the board code sets the redistributor region sizes to
exactly match the CPU count, so this isn't a visible bug. We could
in theory make the GIC code handle non-full redistributor regions, or
have it automatically reduce the provided region sizes to match the
CPU count, but the simplest thing is just to strengthen the error
check and insist that the CPU count and redistributor region size
settings match exactly, since all the board code does that anyway.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-4-peter.maydell@linaro.org
In the GICv3 code we implicitly rely on there being at least one CPU
and thus at least one redistributor and CPU interface. Sanity-check
that the property the board code sets is not zero.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-3-peter.maydell@linaro.org
In commit b6f96009ac we split do_process_its_cmd() from
process_its_cmd(), but forgot the usual blank line between function
definitions. Add it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-2-peter.maydell@linaro.org
* Add support for Ibex SPI to OpenTitan
* Add support for privileged spec version 1.12.0
* Use privileged spec version 1.12.0 for virt machine by default
* Allow software access to MIP SEIP
* Add initial support for the Sdtrig extension
* Optimisations for vector extensions
* Improvements to the misa ISA string
* Add isa extenstion strings to the device tree
* Don't allow `-bios` options with KVM machines
* Fix NAPOT range computation overflow
* Fix DT property mmu-type when CPU mmu option is disabled
* Make RISC-V ACLINT mtime MMIO register writable
* Add and enable native debug feature
* Support 64bit fdt address.
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Merge tag 'pull-riscv-to-apply-20220422-1' of github.com:alistair23/qemu into staging
First RISC-V PR for QEMU 7.1
* Add support for Ibex SPI to OpenTitan
* Add support for privileged spec version 1.12.0
* Use privileged spec version 1.12.0 for virt machine by default
* Allow software access to MIP SEIP
* Add initial support for the Sdtrig extension
* Optimisations for vector extensions
* Improvements to the misa ISA string
* Add isa extenstion strings to the device tree
* Don't allow `-bios` options with KVM machines
* Fix NAPOT range computation overflow
* Fix DT property mmu-type when CPU mmu option is disabled
* Make RISC-V ACLINT mtime MMIO register writable
* Add and enable native debug feature
* Support 64bit fdt address.
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# gpg: Signature made Thu 21 Apr 2022 05:35:48 PM PDT
# gpg: using RSA key F6C4AC46D4934868D3B8CE8F21E10D29DF977054
# gpg: Good signature from "Alistair Francis <alistair@alistair23.me>" [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: F6C4 AC46 D493 4868 D3B8 CE8F 21E1 0D29 DF97 7054
* tag 'pull-riscv-to-apply-20220422-1' of github.com:alistair23/qemu: (31 commits)
hw/riscv: boot: Support 64bit fdt address.
hw/core: tcg-cpu-ops.h: Update comments of debug_check_watchpoint()
target/riscv: cpu: Enable native debug feature
target/riscv: machine: Add debug state description
target/riscv: csr: Hook debug CSR read/write
target/riscv: cpu: Add a config option for native debug
target/riscv: debug: Implement debug related TCGCPUOps
hw/intc: riscv_aclint: Add reset function of ACLINT devices
hw/intc: Make RISC-V ACLINT mtime MMIO register writable
hw/intc: Support 32/64-bit mtimecmp and mtime accesses in RISC-V ACLINT
hw/intc: Add .impl.[min|max]_access_size declaration in RISC-V ACLINT
hw/riscv: virt: fix DT property mmu-type when CPU mmu option is disabled
target/riscv/pmp: fix NAPOT range computation overflow
hw/riscv: virt: Exit if the user provided -bios in combination with KVM
target/riscv: Use cpu_loop_exit_restore directly from mmu faults
target/riscv: fix start byte for vmv<nf>r.v when vstart != 0
target/riscv: Add isa extenstion strings to the device tree
target/riscv: misa to ISA string conversion fix
target/riscv: optimize helper for vmv<nr>r.v
target/riscv: optimize condition assign for scale < 0
...
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Dan: Test fixes and improvements (TLS mostly)
Peter: Postcopy improvements
Me: Race fix for info migrate, and compilation fix
V2:
Fixed checkpatch nit of unneeded NULL check
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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Merge tag 'pull-migration-20220421a' of https://gitlab.com/dagrh/qemu into staging
V2: Migration pull 2022-04-21
Dan: Test fixes and improvements (TLS mostly)
Peter: Postcopy improvements
Me: Race fix for info migrate, and compilation fix
V2:
Fixed checkpatch nit of unneeded NULL check
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
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# gpg: Signature made Thu 21 Apr 2022 11:38:42 AM PDT
# gpg: using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7
# gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full]
* tag 'pull-migration-20220421a' of https://gitlab.com/dagrh/qemu:
migration: Read state once
migration: Fix operator type
migration: Allow migrate-recover to run multiple times
migration: Move channel setup out of postcopy_try_recover()
migration: Export ram_load_postcopy()
migration: Move migrate_allow_multifd and helpers into migration.c
migration: Add pss.postcopy_requested status
migration: Drop multifd tls_hostname cache
migration: Postpone releasing MigrationState.hostname
tests: expand the migration precopy helper to support failures
tests: switch migration FD passing test to use common precopy helper
tests: introduce ability to provide hooks for migration precopy test
tests: merge code for UNIX and TCP migration pre-copy tests
tests: switch MigrateStart struct to be stack allocated
migration: fix use of TLS PSK credentials with a UNIX socket
tests: print newline after QMP response in qtest logs
tests: support QTEST_TRACE env variable
tests: improve error message when saving TLS PSK file fails
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
The current riscv_load_fdt() forces fdt_load_addr to be placed at a dram address within 3GB,
but not all platforms have dram_base within 3GB.
This patch adds an exception for dram base not within 3GB,
which will place fdt at dram_end align 16MB.
riscv_setup_rom_reset_vec() also needs to be modified
Signed-off-by: Dylan Jhong <dylan@andestech.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220419115945.37945-1-dylan@andestech.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This is now used by RISC-V as well. Update the comments.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-7-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Turn on native debug feature by default for all CPUs.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-6-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Add a subsection to machine.c to migrate debug CSR state.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-5-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This adds debug CSR read/write support to the RISC-V CSR RW table.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-4-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Add a config option to enable support for native M-mode debug.
This is disabled by default and can be enabled with 'debug=true'.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-3-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Implement .debug_excp_handler, .debug_check_{breakpoint, watchpoint}
TCGCPUOps and hook them into riscv_tcg_ops.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220421003324.1134983-2-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit implements reset function of all ACLINT devices.
ACLINT device reset will clear MTIME and MSIP register to 0.
Depend on RISC-V ACLINT spec v1.0-rc4:
https://github.com/riscv/riscv-aclint/blob/v1.0-rc4/riscv-aclint.adoc
Signed-off-by: Jim Shu <jim.shu@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220420080901.14655-5-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
RISC-V privilege spec defines that mtime is exposed as a memory-mapped
machine-mode read-write register. However, as QEMU uses host monotonic
timer as timer source, this makes mtime to be read-only in RISC-V
ACLINT.
This patch makes mtime to be writable by recording the time delta value
between the mtime value to be written and the timer value at the time
mtime is written. Time delta value is then added back whenever the timer
value is retrieved.
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220420080901.14655-4-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
RISC-V privilege spec defines that:
* In RV32, memory-mapped writes to mtimecmp modify only one 32-bit part
of the register.
* For RV64, naturally aligned 64-bit memory accesses to the mtime and
mtimecmp registers are additionally supported and are atomic.
It's possible to perform both 32/64-bit read/write accesses to both
mtimecmp and mtime registers.
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
Message-Id: <20220420080901.14655-3-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
If device's MemoryRegion doesn't have .impl.[min|max]_access_size
declaration, the default access_size_min would be 1 byte and
access_size_max would be 4 bytes (see: softmmu/memory.c).
This will cause a 64-bit memory access to ACLINT to be splitted into
two 32-bit memory accesses.
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
Message-Id: <20220420080901.14655-2-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The device tree property "mmu-type" is currently exported as either
"riscv,sv32" or "riscv,sv48".
However, the riscv cpu device tree binding [1] has a specific value
"riscv,none" for a HART without a MMU.
Set the device tree property "mmu-type" to "riscv,none" when the CPU mmu
option is disabled using rv32,mmu=off or rv64,mmu=off.
[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/riscv/cpus.yaml?h=v5.17
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220414155510.1364147-1-niklas.cassel@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
There is an overflow with the current code where a pmpaddr value of
0x1fffffff is decoded as sa=0 and ea=0 whereas it should be sa=0 and
ea=0xffffffff.
Fix that by simplifying the computation. There is in fact no need for
ctz64() nor special case for -1 to achieve proper results.
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <rq81o86n-17ps-92no-p65o-79o88476266@syhkavp.arg>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The -bios option is silently ignored if used in combination with -enable-kvm.
The reason is that the machine starts in S-Mode, and the bios typically runs in
M-Mode.
Better exit in that case to not confuse the user.
Signed-off-by: Ralf Ramsauer <ralf.ramsauer@oth-regensburg.de>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Message-Id: <20220401121842.2791796-1-ralf.ramsauer@oth-regensburg.de>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The riscv_raise_exception function stores its argument into
exception_index and then exits to the main loop. When we
have already set exception_index, we can just exit directly.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220401125948.79292-2-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The spec for vmv<nf>r.v says: 'the instructions operate as if EEW=SEW,
EMUL = NREG, effective length evl= EMUL * VLEN/SEW.'
So the start byte for vstart != 0 should take sew into account
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220330021316.18223-1-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The Linux kernel parses the ISA extensions from "riscv,isa" DT
property. It used to parse only the single letter base extensions
until now. A generic ISA extension parsing framework was proposed[1]
recently that can parse multi-letter ISA extensions as well.
Generate the extended ISA string by appending the available ISA extensions
to the "riscv,isa" string if it is enabled so that kernel can process it.
[1] https://lkml.org/lkml/2022/2/15/263
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Suggested-by: Heiko Stubner <heiko@sntech.de>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Message-Id: <20220329195657.1725425-1-atishp@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Some bits in RISC-V `misa' CSR should not be reflected in the ISA
string. For instance, `S' and `U' (represents existence of supervisor
and user mode, respectively) in `misa' CSR must not be copied since
neither `S' nor `U' are valid single-letter extensions.
This commit also removes all reserved/dropped single-letter "extensions"
from the list.
- "B": Not going to be a single-letter extension (misa.B is reserved).
- "J": Not going to be a single-letter extension (misa.J is reserved).
- "K": Not going to be a single-letter extension (misa.K is reserved).
- "L": Dropped.
- "N": Dropped.
- "T": Dropped.
It also clarifies that the variable `riscv_single_letter_exts' is a
single-letter extension order list.
Signed-off-by: Tsukasa OI <research_trasio@irq.a4lg.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <4a4c11213a161a7eedabe46abe58b351bb0e2ef2.1648473008.git.research_trasio@irq.a4lg.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
LEN is not used for GEN_VEXT_VMV_WHOLE macro, so vmv<nr>r.v can share
the same helper
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220325085902.29500-2-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
for some cases, scale is always equal or less than 0, since lmul is not larger than 3
Signed-off-by: Weiwei Li <liweiwei@iscas.ac.cn>
Signed-off-by: Junqiang Wang <wangjunqiang@iscas.ac.cn>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220325085902.29500-1-liweiwei@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This adds initial support for the Sdtrig extension via the Trigger
Module, as defined in the RISC-V Debug Specification [1].
Only "Address / Data Match" trigger (type 2) is implemented as of now,
which is mainly used for hardware breakpoint and watchpoint. The number
of type 2 triggers implemented is 2, which is the number that we can
find in the SiFive U54/U74 cores.
[1] https://github.com/riscv/riscv-debug-spec/raw/master/riscv-debug-stable.pdf
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20220315065529.62198-2-bmeng.cn@gmail.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The RISC-V specification states that:
"Supervisor-level external interrupts are made pending based on the
logical-OR of the software-writable SEIP bit and the signal from the
external interrupt controller."
We currently only allow either the interrupt controller or software to
set the bit, which is incorrect.
This patch removes the miclaim mask when writing MIP to allow M-mode
software to inject interrupts, even with an interrupt controller.
We then also need to keep track of which source is setting MIP_SEIP. The
final value is a OR of both, so we add two bools and use that to keep
track of the current state. This way either source can change without
losing the correct value.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/904
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220317061817.3856850-3-alistair.francis@opensource.wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220317061817.3856850-2-alistair.francis@opensource.wdc.com>
Virt machine uses privileged specification version 1.12 now.
All other machine continue to use the default one defined for that
machine unless changed to 1.12 by the user explicitly.
This commit enforces the privilege version for csrs introduced in
v1.12 or after.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Message-Id: <20220303185440.512391-7-atishp@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The RISC-V privileged specification v1.12 defines few execution
environment configuration CSRs that can be used enable/disable
extensions per privilege levels.
Add the basic support for these CSRs.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Atish Patra <atishp@rivosinc.com>
Message-Id: <20220303185440.512391-6-atishp@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
