Re: [PATCH v3 14/14] RISC-V: KVM: Increment firmware pmu events

From: Anup Patel <anup@brainfault.org>
To: Atish Patra <atishp@rivosinc.com>
Cc: linux-kernel@vger.kernel.org,
	Andrew Jones <ajones@ventanamicro.com>,
	 Atish Patra <atishp@atishpatra.org>, Guo Ren <guoren@kernel.org>,
	 Heiko Stuebner <heiko@sntech.de>,
	kvm-riscv@lists.infradead.org, kvm@vger.kernel.org,
	 linux-riscv@lists.infradead.org,
	Mark Rutland <mark.rutland@arm.com>,
	 Palmer Dabbelt <palmer@dabbelt.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	 Sergey Matyukevich <sergey.matyukevich@syntacore.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH v3 14/14] RISC-V: KVM: Increment firmware pmu events
Date: Mon, 30 Jan 2023 21:18:10 +0530	[thread overview]
Message-ID: <CAAhSdy1C1wKDBwRbyx=i63_AyGBsgN881_E-fxR=8qqYgwUtGw@mail.gmail.com> (raw)
In-Reply-To: <20230127182558.2416400-15-atishp@rivosinc.com>

On Fri, Jan 27, 2023 at 11:56 PM Atish Patra <atishp@rivosinc.com> wrote:
>
> KVM supports firmware events now. Invoke the firmware event increment
> function from appropriate places.
>
> Signed-off-by: Atish Patra <atishp@rivosinc.com>

Looks good to me.

Reviewed-by: Anup Patel <anup@brainfault.org>

Regards,
Anup

> ---
>  arch/riscv/kvm/tlb.c              | 4 ++++
>  arch/riscv/kvm/vcpu_sbi_replace.c | 7 +++++++
>  2 files changed, 11 insertions(+)
>
> diff --git a/arch/riscv/kvm/tlb.c b/arch/riscv/kvm/tlb.c
> index 309d79b..b797f7c 100644
> --- a/arch/riscv/kvm/tlb.c
> +++ b/arch/riscv/kvm/tlb.c
> @@ -181,6 +181,7 @@ void kvm_riscv_local_tlb_sanitize(struct kvm_vcpu *vcpu)
>
>  void kvm_riscv_fence_i_process(struct kvm_vcpu *vcpu)
>  {
> +       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_FENCE_I_RCVD);
>         local_flush_icache_all();
>  }
>
> @@ -264,15 +265,18 @@ void kvm_riscv_hfence_process(struct kvm_vcpu *vcpu)
>                                                 d.addr, d.size, d.order);
>                         break;
>                 case KVM_RISCV_HFENCE_VVMA_ASID_GVA:
> +                       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_HFENCE_VVMA_ASID_RCVD);
>                         kvm_riscv_local_hfence_vvma_asid_gva(
>                                                 READ_ONCE(v->vmid), d.asid,
>                                                 d.addr, d.size, d.order);
>                         break;
>                 case KVM_RISCV_HFENCE_VVMA_ASID_ALL:
> +                       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_HFENCE_VVMA_ASID_RCVD);
>                         kvm_riscv_local_hfence_vvma_asid_all(
>                                                 READ_ONCE(v->vmid), d.asid);
>                         break;
>                 case KVM_RISCV_HFENCE_VVMA_GVA:
> +                       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_HFENCE_VVMA_RCVD);
>                         kvm_riscv_local_hfence_vvma_gva(
>                                                 READ_ONCE(v->vmid),
>                                                 d.addr, d.size, d.order);
> diff --git a/arch/riscv/kvm/vcpu_sbi_replace.c b/arch/riscv/kvm/vcpu_sbi_replace.c
> index abeb55f..71a671e 100644
> --- a/arch/riscv/kvm/vcpu_sbi_replace.c
> +++ b/arch/riscv/kvm/vcpu_sbi_replace.c
> @@ -11,6 +11,7 @@
>  #include <linux/kvm_host.h>
>  #include <asm/sbi.h>
>  #include <asm/kvm_vcpu_timer.h>
> +#include <asm/kvm_vcpu_pmu.h>
>  #include <asm/kvm_vcpu_sbi.h>
>
>  static int kvm_sbi_ext_time_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
> @@ -25,6 +26,7 @@ static int kvm_sbi_ext_time_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
>                 return 0;
>         }
>
> +       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_SET_TIMER);
>  #if __riscv_xlen == 32
>         next_cycle = ((u64)cp->a1 << 32) | (u64)cp->a0;
>  #else
> @@ -57,6 +59,7 @@ static int kvm_sbi_ext_ipi_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
>                 return 0;
>         }
>
> +       kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_IPI_SENT);
>         kvm_for_each_vcpu(i, tmp, vcpu->kvm) {
>                 if (hbase != -1UL) {
>                         if (tmp->vcpu_id < hbase)
> @@ -67,6 +70,7 @@ static int kvm_sbi_ext_ipi_handler(struct kvm_vcpu *vcpu, struct kvm_run *run,
>                 ret = kvm_riscv_vcpu_set_interrupt(tmp, IRQ_VS_SOFT);
>                 if (ret < 0)
>                         break;
> +               kvm_riscv_vcpu_pmu_incr_fw(tmp, SBI_PMU_FW_IPI_RECVD);
>         }
>
>         return ret;
> @@ -90,6 +94,7 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run
>         switch (funcid) {
>         case SBI_EXT_RFENCE_REMOTE_FENCE_I:
>                 kvm_riscv_fence_i(vcpu->kvm, hbase, hmask);
> +               kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_FENCE_I_SENT);
>                 break;
>         case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA:
>                 if (cp->a2 == 0 && cp->a3 == 0)
> @@ -97,6 +102,7 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run
>                 else
>                         kvm_riscv_hfence_vvma_gva(vcpu->kvm, hbase, hmask,
>                                                   cp->a2, cp->a3, PAGE_SHIFT);
> +               kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_HFENCE_VVMA_SENT);
>                 break;
>         case SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID:
>                 if (cp->a2 == 0 && cp->a3 == 0)
> @@ -107,6 +113,7 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run
>                                                        hbase, hmask,
>                                                        cp->a2, cp->a3,
>                                                        PAGE_SHIFT, cp->a4);
> +               kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_HFENCE_VVMA_ASID_SENT);
>                 break;
>         case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA:
>         case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID:
> --
> 2.25.1
>

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