When we measure FIO read performance (cache=writethrough, bs=4k,
iodepth=64) in VMs, ~80K/s notifications (e.g., EPT_MISCONFIG) are observed
from guest to qemu.
It turns out those frequent notificatons are caused by interference from
worker threads. Worker threads queue bottom halves after completing IO
requests. Pending bottom halves may lead to either aio_compute_timeout()
zeros timeout and pass it to try_poll_mode() or run_poll_handlers() returns
no progress after noticing pending aio_notify() events. Both cause
run_poll_handlers() to call poll_set_started(false) to disable poll mode.
However, for both cases, as timeout is already zeroed, the event loop
(i.e., aio_poll()) just processes bottom halves and then starts the next
event loop iteration. So, disabling poll mode has no value but leads to
unnecessary notifications from guest.
To minimize unnecessary notifications from guest, defer disabling poll
mode to when the event loop is about to be blocked.
With this patch applied, FIO seq-read performance (bs=4k, iodepth=64,
cache=writethrough) in VMs increases from 330K/s to 413K/s IOPS.
Suggested-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Chao Gao <chao.gao@intel.com>
Message-id: 20220710120849.63086-1-chao.gao@intel.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Do not encode the pointer as a constant in the opcode stream.
This pointer is specific to the cpu that first generated the
translation, which runs into problems with both hot-pluggable
cpus and user-only threads, as cpus are removed. It's also a
potential correctness issue in the theoretical case of a
slightly-heterogenous system, because if CPU 0 generates a
TB and then CPU 1 executes it, CPU 1 will end up using CPU 0's
hash table, which might have a wrong set of registers in it.
(All our current systems are either completely homogenous,
M-profile, or have CPUs sufficiently different that they
wouldn't be sharing TBs anyway because the differences would
show up in the TB flags, so the correctness issue is only
theoretical, not practical.)
Perform the lookup in either helper_access_check_cp_reg,
or a new helper_lookup_cp_reg.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230106194451.1213153-3-richard.henderson@linaro.org
[PMM: added note in commit message about correctness issue]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Move the ri == NULL case to the top of the function and return.
This allows the else to be removed and the code unindented.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20230106194451.1213153-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Qemu doesn't implement Debug Communication Channel, as well as the rest
of external debug interface. However, Microsoft Hyper-V in tries to
access some of those registers during an EL2 context switch.
Since there is no architectural way to not advertise support for external
debug, provide RAZ/WI stubs for OSDTRRX_EL1, OSDTRTX_EL1 and OSECCR_EL1
registers in the same way the rest of DCM is currently done. Do account
for access traps though with access_tda.
Signed-off-by: Evgeny Iakovlev <eiakovlev@linux.microsoft.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20230120155929.32384-3-eiakovlev@linux.microsoft.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The architecture does not define any functionality for the CLAIM tag bits.
So we will just keep the raw bits, as per spec.
Signed-off-by: Evgeny Iakovlev <eiakovlev@linux.microsoft.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230120155929.32384-2-eiakovlev@linux.microsoft.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In v7m_exception_taken(), for v8M we set the EXC_RETURN.ES bit if
either the exception targets Secure or if the CPU doesn't implement
the Security Extension. This is incorrect: the v8M Arm ARM specifies
that the ES bit should be RES0 if the Security Extension is not
implemented, and the pseudocode agrees.
Remove the incorrect condition, so that we leave the ES bit 0
if the Security Extension isn't implemented.
This doesn't have any guest-visible effects for our current set of
emulated CPUs, because all our v8M CPUs implement the Security
Extension; but it's worth fixing in case we add a v8M CPU without
the extension in future.
Reported-by: Igor Kotrasinski <i.kotrasinsk@samsung.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Unify the two helper_set_pstate_{sm,za} in this function.
Do not call helper_* functions from svcr_write.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230112102436.1913-8-philmd@linaro.org
Message-Id: <20230112004322.161330-1-richard.henderson@linaro.org>
[PMD: Split patch in multiple tiny steps]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
ARM_SBCON_I2C() macro and ArmSbconI2CState typedef are
already declared via the QOM DECLARE_INSTANCE_CHECKER()
macro in "hw/i2c/arm_sbcon_i2c.h". Drop the VERSATILE_I2C
declarations from versatile_i2c.c.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230110082508.24038-5-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230110082508.24038-4-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In order to rename TYPE_VERSATILE_I2C as TYPE_ARM_SBCON_I2C
(the formal ARM naming), start renaming its state.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230110082508.24038-3-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230110082508.24038-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Define TYPE_GPIO_I2C in the public "hw/i2c/bitbang_i2c.h"
header and use it in hw/arm/musicpal.c.
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: Corey Minyard <cminyard@mvista.com>
Message-id: 20230111085016.44551-2-philmd@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
BASEPRI, FAULTMASK, and their _NS equivalents only exist on devices with
the Main Extension. However, the MRS instruction did not check this,
and the MSR instruction handled it inconsistently (warning BASEPRI, but
silently ignoring writes to BASEPRI_NS). Unify this behavior and always
warn when reading or writing any of these registers if the extension is
not present.
Signed-off-by: David Reiss <dreiss@meta.com>
Message-id: 167330628518.10497.13100425787268927786-0@git.sr.ht
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This is a 64-bit register on AArch64, even if the high 44 bits
are RES0. Because this is defined as ARM_CP_STATE_BOTH, we are
asserting that the cpreg field is 64-bits.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1400
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230115171633.3171890-1-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* riscv_htif: Support console output via proxy syscall
* Cleanup firmware and device tree loading
* Fix elen check when using vector extensions
* add RISC-V OpenSBI boot test
* Ensure we always follow MISA parsing
* Fix up masking of vsip/vsie accesses
* Trap on writes to stimecmp from VS when hvictl.VTI=1
* Introduce helper_set_rounding_mode_chkfrm
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Merge tag 'pull-riscv-to-apply-20230120' of https://github.com/alistair23/qemu into staging
Second RISC-V PR for QEMU 8.0
* riscv_htif: Support console output via proxy syscall
* Cleanup firmware and device tree loading
* Fix elen check when using vector extensions
* add RISC-V OpenSBI boot test
* Ensure we always follow MISA parsing
* Fix up masking of vsip/vsie accesses
* Trap on writes to stimecmp from VS when hvictl.VTI=1
* Introduce helper_set_rounding_mode_chkfrm
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# gpg: Signature made Fri 20 Jan 2023 07:38:37 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
* tag 'pull-riscv-to-apply-20230120' of https://github.com/alistair23/qemu: (37 commits)
hw/riscv/virt.c: move create_fw_cfg() back to virt_machine_init()
target/riscv: Remove helper_set_rod_rounding_mode
target/riscv: Introduce helper_set_rounding_mode_chkfrm
tcg/riscv: Use tcg_pcrel_diff in tcg_out_ldst
target/riscv: Trap on writes to stimecmp from VS when hvictl.VTI=1
target/riscv: Fix up masking of vsip/vsie accesses
hw/riscv: use ms->fdt in riscv_socket_fdt_write_distance_matrix()
hw/riscv: use MachineState::fdt in riscv_socket_fdt_write_id()
hw/riscv/virt.c: remove 'is_32_bit' param from create_fdt_socket_cpus()
hw/riscv/sifive_u.c: simplify create_fdt()
hw/riscv/virt.c: simplify create_fdt()
hw/riscv/spike.c: simplify create_fdt()
target/riscv: Use TARGET_FMT_lx for env->mhartid
target/riscv/cpu.c: do not skip misa logic in riscv_cpu_realize()
target/riscv/cpu: set cpu->cfg in register_cpu_props()
hw/riscv/boot.c: use MachineState in riscv_load_kernel()
hw/riscv/boot.c: use MachineState in riscv_load_initrd()
hw/riscv: write bootargs 'chosen' FDT after riscv_load_kernel()
hw/riscv: write initrd 'chosen' FDT inside riscv_load_initrd()
hw/riscv/spike.c: load initrd right after riscv_load_kernel()
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
PnvChip is typedef'ed in five places, and PnvPhb4PecState in two.
Keep one, drop the others.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221222104628.659681-5-armbru@redhat.com>
The next commit needs to include hw/ppc/pnv.h from
hw/pci-host/pnv_phb.h. Avoid an inclusion loop.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221222104628.659681-4-armbru@redhat.com>
A few headers neglect to include headers they need. They compile only
if something else includes the required header(s) first. Fix that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221222104628.659681-3-armbru@redhat.com>
PnvChipClass, PnvChip, Pnv8Chip, Pnv9Chip, and Pnv10Chip are defined
in pnv.h. Many users of the header don't actually need them. One
instance is this inclusion loop: hw/ppc/pnv_homer.h includes
hw/ppc/pnv.h for typedef PnvChip, and vice versa for struct PnvHomer.
Similar structs live in their own headers: PnvHomerClass and PnvHomer
in pnv_homer.h, PnvLpcClass and PnvLpcController in pci_lpc.h,
PnvPsiClass, PnvPsi, Pnv8Psi, Pnv9Psi, Pnv10Psi in pnv_psi.h, ...
Move PnvChipClass, PnvChip, Pnv8Chip, Pnv9Chip, and Pnv10Chip to new
pnv_chip.h, and adjust include directives. This breaks the inclusion
loop mentioned above.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221222104628.659681-2-armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221221133551.3967339-3-armbru@redhat.com>
We have two inclusion loops:
block/block.h
-> block/block-global-state.h
-> block/block-common.h
-> block/blockjob.h
-> block/block.h
block/block.h
-> block/block-io.h
-> block/block-common.h
-> block/blockjob.h
-> block/block.h
I believe these go back to Emanuele's reorganization of the block API,
merged a few months ago in commit d7e2fe4aac.
Fortunately, breaking them is merely a matter of deleting unnecessary
includes from headers, and adding them back in places where they are
now missing.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221221133551.3967339-2-armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221221131435.3851212-6-armbru@redhat.com>
qemu/coroutine.h and qemu/lockable.h include each other.
They need each other only in macro expansions, so we could simply drop
both inclusions to break the loop, and add suitable includes to files
that expand the macros.
Instead, move a part of qemu/coroutine.h to new qemu/coroutine-core.h
so that qemu/coroutine-core.h doesn't need qemu/lockable.h, and
qemu/lockable.h only needs qemu/coroutine-core.h. Result:
qemu/coroutine.h includes qemu/lockable.h includes
qemu/coroutine-core.h.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221221131435.3851212-5-armbru@redhat.com>
[Semantic rebase conflict with 7c10cb38cc "accel/tcg: Add debuginfo
support" resolved]
Commit 1c20d3ff60 ("hw/riscv: virt: Add a machine done notifier")
moved the initialization of fw_cfg to the virt_machine_done() callback.
Problem is that the validation of fw_cfg by devices such as ramfb is
done before the machine done notifier is called. Moving create_fw_cfg()
to machine_done() results in QEMU failing to boot when using a ramfb
device:
./qemu-system-riscv64 -machine virt -device ramfb -serial stdio
qemu-system-riscv64: -device ramfb: ramfb device requires fw_cfg with DMA
The fix is simple: move create_fw_cfg() config back to
virt_machine_init(). This happens to be the same way the ARM 'virt'
machine deals with fw_cfg (see machvirt_init() and virt_machine_done()
in hw/arm/virt.c), so we're keeping consistency with how other machines
handle this device.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1343
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230117132751.229738-2-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The only setting of RISCV_FRM_ROD is from the vector unit,
and now handled by helper_set_rounding_mode_chkfrm.
This helper is now unused.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230115160657.3169274-3-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The new helper always validates the contents of FRM, even
if the new rounding mode is not DYN. This is required by
the vector unit.
Track whether we've validated FRM separately from whether
we've updated fp_status with a given rounding mode, so that
we can elide calls correctly.
This partially reverts d6c4d3f2a6 which attempted the to do
the same thing, but with two calls to gen_set_rm(), which is
both inefficient and tickles an assertion in decode_save_opc.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1441
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230115160657.3169274-2-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
We failed to update this with the w^x split, so misses the fact
that true pc-relative offsets are usually small.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230117230415.354239-1-richard.henderson@linaro.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Per the AIA specification, writes to stimecmp from VS level should
trap when hvictl.VTI is set since the write may cause vsip.STIP to
become unset.
Fixes: 3ec0fe18a3 ("target/riscv: Add vstimecmp support")
Signed-off-by: Andrew Bresticker <abrestic@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221215224541.1423431-2-abrestic@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
The current logic attempts to shift the VS-level bits into their correct
position in mip while leaving the remaining bits in-tact. This is both
pointless and likely incorrect since one would expect that any new, future
VS-level interrupts will get their own position in mip rather than sharing
with their (H)S-level equivalent. Fix this, and make the logic more
readable, by just making off the VS-level bits and shifting them into
position.
This also fixes reads of vsip, which would only ever report vsip.VSSIP
since the non-writable bits got masked off as well.
Fixes: d028ac7512 ("arget/riscv: Implement AIA CSRs for 64 local interrupts on RV32")
Signed-off-by: Andrew Bresticker <abrestic@rivosinc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221215224541.1423431-1-abrestic@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
There's no need to use a MachineState pointer and a fdt pointer now that
all RISC-V machines are using the FDT from the MachineState.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230111170948.316276-7-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
There's no need to use a MachineState pointer and a fdt pointer now that
all RISC-V machines are using the FDT from the MachineState.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230111170948.316276-6-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
create_fdt_socket_cpus() writes a different 'mmu-type' value if we're
running in 32 or 64 bits. However, the flag is being calculated during
virt_machine_init(), and is passed around in create_fdt(), then
create_fdt_socket(), and then finally create_fdt_socket_cpus(). None of
the intermediate functions are using the flag, which is a bit
misleading.
Remove 'is_32_bit' flag from create_fdt_socket_cpus() and calculate it
using the already available RISCVVirtState pointer. This will also
change the signature of create_fdt_socket() and create_fdt(), making it
clear that these functions don't do anything special when we're running
in 32 bit mode.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230111170948.316276-5-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
'cmdline' isn't being used. Remove it.
A MachineState pointer is being retrieved via a MACHINE() macro calling
qdev_get_machine(). Use MACHINE(s) instead to avoid calling qdev().
'mem_size' is being set as machine->ram_size by the caller. Retrieve it
via ms->ram_size.
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230111170948.316276-4-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
'mem_size' and 'cmdline' aren't being used. Remove them.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230111170948.316276-3-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
