diff options
| author | Atish Patra <atish.patra@wdc.com> | 2021-09-27 17:10:11 +0530 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2021-10-04 16:07:16 +0530 |
| commit | 3a9f66cb25e18a3eeca36c08d9f823a35b3ddc22 (patch) | |
| tree | a15be60b9addd26c0fde559d2f2a80cad0bda612 /arch/riscv/include/asm/kvm_host.h | |
| parent | 9955371cc014e02a1ef2d13c4aaf743d18bd66aa (diff) | |
RISC-V: KVM: Add timer functionality
The RISC-V hypervisor specification doesn't have any virtual timer
feature.
Due to this, the guest VCPU timer will be programmed via SBI calls.
The host will use a separate hrtimer event for each guest VCPU to
provide timer functionality. We inject a virtual timer interrupt to
the guest VCPU whenever the guest VCPU hrtimer event expires.
This patch adds guest VCPU timer implementation along with ONE_REG
interface to access VCPU timer state from user space.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/include/asm/kvm_host.h')
| -rw-r--r-- | arch/riscv/include/asm/kvm_host.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/kvm_host.h b/arch/riscv/include/asm/kvm_host.h index 17ed90a4798e..c22d3f6519fa 100644 --- a/arch/riscv/include/asm/kvm_host.h +++ b/arch/riscv/include/asm/kvm_host.h @@ -12,6 +12,7 @@ #include <linux/types.h> #include <linux/kvm.h> #include <linux/kvm_types.h> +#include <asm/kvm_vcpu_timer.h> #ifdef CONFIG_64BIT #define KVM_MAX_VCPUS (1U << 16) @@ -60,6 +61,9 @@ struct kvm_arch { /* stage2 page table */ pgd_t *pgd; phys_addr_t pgd_phys; + + /* Guest Timer */ + struct kvm_guest_timer timer; }; struct kvm_mmio_decode { @@ -175,6 +179,9 @@ struct kvm_vcpu_arch { unsigned long irqs_pending; unsigned long irqs_pending_mask; + /* VCPU Timer */ + struct kvm_vcpu_timer timer; + /* MMIO instruction details */ struct kvm_mmio_decode mmio_decode; |