diff options
| author | Andrew Jones <ajones@ventanamicro.com> | 2023-12-20 19:00:18 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2023-12-30 08:56:22 +0300 |
| commit | 2a1f6bf079700f0f9d8045ab77b302aeb4d12c06 (patch) | |
| tree | 72fd530c895a6571383541f3347933a7d40c37ca /arch/riscv/kvm | |
| parent | 5fed84a800e6048656c17be6e921787db2b5c6c0 (diff) | |
| download | linux-2a1f6bf079700f0f9d8045ab77b302aeb4d12c06.tar.xz | |
RISC-V: KVM: Add steal-update vcpu request
Add a new vcpu request to inform a vcpu that it should record its
steal-time information. The request is made each time it has been
detected that the vcpu task was not assigned a cpu for some time,
which is easy to do by making the request from vcpu-load. The record
function is just a stub for now and will be filled in with the rest
of the steal-time support functions in following patches.
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
Diffstat (limited to 'arch/riscv/kvm')
| -rw-r--r-- | arch/riscv/kvm/vcpu.c | 5 | ||||
| -rw-r--r-- | arch/riscv/kvm/vcpu_sbi_sta.c | 4 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c index bf3952d1a621..6995b8b641e4 100644 --- a/arch/riscv/kvm/vcpu.c +++ b/arch/riscv/kvm/vcpu.c @@ -541,6 +541,8 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) kvm_riscv_vcpu_aia_load(vcpu, cpu); + kvm_make_request(KVM_REQ_STEAL_UPDATE, vcpu); + vcpu->cpu = cpu; } @@ -614,6 +616,9 @@ static void kvm_riscv_check_vcpu_requests(struct kvm_vcpu *vcpu) if (kvm_check_request(KVM_REQ_HFENCE, vcpu)) kvm_riscv_hfence_process(vcpu); + + if (kvm_check_request(KVM_REQ_STEAL_UPDATE, vcpu)) + kvm_riscv_vcpu_record_steal_time(vcpu); } } diff --git a/arch/riscv/kvm/vcpu_sbi_sta.c b/arch/riscv/kvm/vcpu_sbi_sta.c index 839911dcd837..e28351c9488b 100644 --- a/arch/riscv/kvm/vcpu_sbi_sta.c +++ b/arch/riscv/kvm/vcpu_sbi_sta.c @@ -8,6 +8,10 @@ #include <asm/kvm_vcpu_sbi.h> #include <asm/sbi.h> +void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu) +{ +} + static int kvm_sbi_sta_steal_time_set_shmem(struct kvm_vcpu *vcpu) { return SBI_ERR_FAILURE; |