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| author | Rajnesh Kanwal <rkanwal@rivosinc.com> | 2023-10-16 12:17:35 +0100 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2023-11-07 11:02:17 +1000 |
| commit | 1697837ed98cf56a6f65edd06128151f83b99403 (patch) | |
| tree | 19c70275348fb836c8ec1d0d13c9facc8db9231b /target/riscv/machine.c | |
| parent | 1ebad505f3d5108513bf150b901344caceb3a7c1 (diff) | |
| download | qemu-1697837ed98cf56a6f65edd06128151f83b99403.zip qemu-1697837ed98cf56a6f65edd06128151f83b99403.tar.gz qemu-1697837ed98cf56a6f65edd06128151f83b99403.tar.bz2 | |
target/riscv: Add M-mode virtual interrupt and IRQ filtering support.
This change adds support for inserting virtual interrupts from M-mode
into S-mode using mvien and mvip csrs. IRQ filtering is a use case of
this change, i-e M-mode can stop delegating an interrupt to S-mode and
instead enable it in MIE and receive those interrupts in M-mode and then
selectively inject the interrupt using mvien and mvip.
Also, the spec doesn't mandate the interrupt to be actually supported
in hardware. Which allows M-mode to assert virtual interrupts to S-mode
that have no connection to any real interrupt events.
This is defined as part of the AIA specification [0], "5.3 Interrupt
filtering and virtual interrupts for supervisor level".
[0]: https://github.com/riscv/riscv-aia/releases/download/1.0/riscv-interrupts-1.0.pdf
Signed-off-by: Rajnesh Kanwal <rkanwal@rivosinc.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Message-ID: <20231016111736.28721-6-rkanwal@rivosinc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target/riscv/machine.c')
| -rw-r--r-- | target/riscv/machine.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/target/riscv/machine.c b/target/riscv/machine.c index c7c862c..f65a95f 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -351,8 +351,8 @@ static const VMStateDescription vmstate_jvt = { const VMStateDescription vmstate_riscv_cpu = { .name = "cpu", - .version_id = 8, - .minimum_version_id = 8, + .version_id = 9, + .minimum_version_id = 9, .post_load = riscv_cpu_post_load, .fields = (VMStateField[]) { VMSTATE_UINTTL_ARRAY(env.gpr, RISCVCPU, 32), @@ -379,6 +379,9 @@ const VMStateDescription vmstate_riscv_cpu = { VMSTATE_UINT64(env.mip, RISCVCPU), VMSTATE_UINT64(env.miclaim, RISCVCPU), VMSTATE_UINT64(env.mie, RISCVCPU), + VMSTATE_UINT64(env.mvien, RISCVCPU), + VMSTATE_UINT64(env.mvip, RISCVCPU), + VMSTATE_UINT64(env.sie, RISCVCPU), VMSTATE_UINT64(env.mideleg, RISCVCPU), VMSTATE_UINTTL(env.satp, RISCVCPU), VMSTATE_UINTTL(env.stval, RISCVCPU), |