We implement KVM device interface for in-kernel AIA irqchip so that
user-space can use KVM device ioctls to create, configure, and destroy
in-kernel AIA irqchip.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
To incrementally implement in-kernel AIA irqchip support, we first
add minimal skeletal support which only compiles but does not provide
any functionality.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
We hard-code the kvm_riscv_aia_nr_hgei to zero until IMSIC HW
guest file support is added in KVM RISC-V.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
We add IMSIC related defines in a separate header so that different
parts of KVM code can share it. Once AIA drivers are merged will
have a common IMSIC header shared by both KVM and IRQCHIP driver.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
The RISC-V host will have one guest external interrupt line for each
VS-level IMSICs associated with a HART. The guest external interrupt
lines are per-HART resources and hypervisor can use HGEIE, HGEIP, and
HIE CSRs to manage these guest external interrupt lines.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
The AIA specification introduce per-HART AIA CSRs which primarily
support:
* 64 local interrupts on both RV64 and RV32
* priority for each of the 64 local interrupts
* interrupt filtering for local interrupts
This patch virtualize above mentioned AIA CSRs and also extend
ONE_REG interface to allow user-space save/restore Guest/VM
view of these CSRs.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
To incrementally implement AIA support, we first add minimal skeletal
support which only compiles and detects AIA hardware support at the
boot-time but does not provide any functionality.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
