From: Anup Patel <anup@brainfault.org> To: Atish Patra <atishp@atishpatra.org> Cc: Anup Patel <apatel@ventanamicro.com>, Paolo Bonzini <pbonzini@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com>, Alistair Francis <Alistair.Francis@wdc.com>, KVM General <kvm@vger.kernel.org>, "open list:KERNEL VIRTUAL MACHINE FOR RISC-V (KVM/riscv)" <kvm-riscv@lists.infradead.org>, linux-riscv <linux-riscv@lists.infradead.org>, "linux-kernel@vger.kernel.org List" <linux-kernel@vger.kernel.org> Subject: Re: [PATCH v2 3/7] RISC-V: KVM: Treat SBI HFENCE calls as NOPs Date: Mon, 9 May 2022 11:02:21 +0530 [thread overview] Message-ID: <CAAhSdy281_AgjQyUXLfF8ZP2SXpyKGVd68XwVEGuQVFoz16_3g@mail.gmail.com> (raw) In-Reply-To: <CAOnJCU+sDbJERnrcTUiLowvpfRDJ=-YPkc2dxzbfsD+qFBMUKw@mail.gmail.com> On Wed, May 4, 2022 at 7:44 AM Atish Patra <atishp@atishpatra.org> wrote: > > On Wed, Apr 20, 2022 at 4:25 AM Anup Patel <apatel@ventanamicro.com> wrote: > > > > We should treat SBI HFENCE calls as NOPs until nested virtualization > > is supported by KVM RISC-V. This will help us test booting a hypervisor > > under KVM RISC-V. > > > > Signed-off-by: Anup Patel <apatel@ventanamicro.com> > > --- > > arch/riscv/kvm/vcpu_sbi_replace.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/arch/riscv/kvm/vcpu_sbi_replace.c b/arch/riscv/kvm/vcpu_sbi_replace.c > > index 0f217365c287..3c1dcd38358e 100644 > > --- a/arch/riscv/kvm/vcpu_sbi_replace.c > > +++ b/arch/riscv/kvm/vcpu_sbi_replace.c > > @@ -117,7 +117,11 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run > > case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID: > > case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA: > > case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID: > > - /* TODO: implement for nested hypervisor case */ > > + /* > > + * Until nested virtualization is implemented, the > > + * SBI HFENCE calls should be treated as NOPs > > + */ > > + break; > > default: > > ret = -EOPNOTSUPP; > > } > > -- > > 2.25.1 > > > > > Reviewed-by: Atish Patra <atishp@rivosinc.com> Queued this patch for 5.19 Thanks, Anup > -- > Regards, > Atish _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: Anup Patel <anup@brainfault.org> To: Atish Patra <atishp@atishpatra.org> Cc: Anup Patel <apatel@ventanamicro.com>, Paolo Bonzini <pbonzini@redhat.com>, Palmer Dabbelt <palmer@dabbelt.com>, Paul Walmsley <paul.walmsley@sifive.com>, Alistair Francis <Alistair.Francis@wdc.com>, KVM General <kvm@vger.kernel.org>, "open list:KERNEL VIRTUAL MACHINE FOR RISC-V (KVM/riscv)" <kvm-riscv@lists.infradead.org>, linux-riscv <linux-riscv@lists.infradead.org>, "linux-kernel@vger.kernel.org List" <linux-kernel@vger.kernel.org> Subject: Re: [PATCH v2 3/7] RISC-V: KVM: Treat SBI HFENCE calls as NOPs Date: Mon, 9 May 2022 11:02:21 +0530 [thread overview] Message-ID: <CAAhSdy281_AgjQyUXLfF8ZP2SXpyKGVd68XwVEGuQVFoz16_3g@mail.gmail.com> (raw) In-Reply-To: <CAOnJCU+sDbJERnrcTUiLowvpfRDJ=-YPkc2dxzbfsD+qFBMUKw@mail.gmail.com> On Wed, May 4, 2022 at 7:44 AM Atish Patra <atishp@atishpatra.org> wrote: > > On Wed, Apr 20, 2022 at 4:25 AM Anup Patel <apatel@ventanamicro.com> wrote: > > > > We should treat SBI HFENCE calls as NOPs until nested virtualization > > is supported by KVM RISC-V. This will help us test booting a hypervisor > > under KVM RISC-V. > > > > Signed-off-by: Anup Patel <apatel@ventanamicro.com> > > --- > > arch/riscv/kvm/vcpu_sbi_replace.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/arch/riscv/kvm/vcpu_sbi_replace.c b/arch/riscv/kvm/vcpu_sbi_replace.c > > index 0f217365c287..3c1dcd38358e 100644 > > --- a/arch/riscv/kvm/vcpu_sbi_replace.c > > +++ b/arch/riscv/kvm/vcpu_sbi_replace.c > > @@ -117,7 +117,11 @@ static int kvm_sbi_ext_rfence_handler(struct kvm_vcpu *vcpu, struct kvm_run *run > > case SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID: > > case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA: > > case SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID: > > - /* TODO: implement for nested hypervisor case */ > > + /* > > + * Until nested virtualization is implemented, the > > + * SBI HFENCE calls should be treated as NOPs > > + */ > > + break; > > default: > > ret = -EOPNOTSUPP; > > } > > -- > > 2.25.1 > > > > > Reviewed-by: Atish Patra <atishp@rivosinc.com> Queued this patch for 5.19 Thanks, Anup > -- > Regards, > Atish
next prev parent reply other threads:[~2022-05-09 5:32 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-04-20 11:24 [PATCH v2 0/7] KVM RISC-V Sv57x4 support and HFENCE improvements Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 1/7] RISC-V: KVM: Use G-stage name for hypervisor page table Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-04 2:13 ` Atish Patra 2022-05-04 2:13 ` Atish Patra 2022-05-09 5:30 ` Anup Patel 2022-05-09 5:30 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 2/7] RISC-V: KVM: Add Sv57x4 mode support for G-stage Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-04 2:14 ` Atish Patra 2022-05-04 2:14 ` Atish Patra 2022-05-09 5:31 ` Anup Patel 2022-05-09 5:31 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 3/7] RISC-V: KVM: Treat SBI HFENCE calls as NOPs Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-04 2:14 ` Atish Patra 2022-05-04 2:14 ` Atish Patra 2022-05-09 5:32 ` Anup Patel [this message] 2022-05-09 5:32 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 4/7] RISC-V: KVM: Introduce range based local HFENCE functions Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-06 6:49 ` Atish Patra 2022-05-06 6:49 ` Atish Patra 2022-05-09 5:33 ` Anup Patel 2022-05-09 5:33 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 5/7] RISC-V: KVM: Reduce KVM_MAX_VCPUS value Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-04 2:15 ` Atish Patra 2022-05-04 2:15 ` Atish Patra 2022-05-09 5:33 ` Anup Patel 2022-05-09 5:33 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 6/7] RISC-V: KVM: Add remote HFENCE functions based on VCPU requests Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-06 7:41 ` Atish Patra 2022-05-06 7:41 ` Atish Patra 2022-05-09 5:34 ` Anup Patel 2022-05-09 5:34 ` Anup Patel 2022-04-20 11:24 ` [PATCH v2 7/7] RISC-V: KVM: Cleanup stale TLB entries when host CPU changes Anup Patel 2022-04-20 11:24 ` Anup Patel 2022-05-06 7:53 ` Atish Patra 2022-05-06 7:53 ` Atish Patra 2022-05-09 5:34 ` Anup Patel 2022-05-09 5:34 ` Anup Patel
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