From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: kvm-ppc@vger.kernel.org
Cc: x86@kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-s390@vger.kernel.org, linux-riscv@lists.infradead.org,
linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
kvm-riscv@lists.infradead.org,
Alex Williamson <alex.williamson@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Fabiano Rosas <farosas@linux.ibm.com>
Subject: Re: [PATCH kernel] KVM: PPC: Make KVM_CAP_IRQFD_RESAMPLE platform dependent
Date: Tue, 13 Sep 2022 22:50:49 +1000 [thread overview]
Message-ID: <59dfb450-5a91-f27b-6edf-0adfa89729b7@ozlabs.ru> (raw)
In-Reply-To: <0d4bb0fa-10c6-3f5a-34c8-293144b3fdbb@ozlabs.ru>
Ping? It's been a while and probably got lost :-/
On 18/05/2022 16:27, Alexey Kardashevskiy wrote:
>
>
> On 5/4/22 17:48, Alexey Kardashevskiy wrote:
>> When introduced, IRQFD resampling worked on POWER8 with XICS. However
>> KVM on POWER9 has never implemented it - the compatibility mode code
>> ("XICS-on-XIVE") misses the kvm_notify_acked_irq() call and the native
>> XIVE mode does not handle INTx in KVM at all.
>>
>> This moved the capability support advertising to platforms and stops
>> advertising it on XIVE, i.e. POWER9 and later.
>>
>> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
>> ---
>>
>>
>> Or I could move this one together with KVM_CAP_IRQFD. Thoughts?
>
>
> Ping?
>
>>
>> ---
>> arch/arm64/kvm/arm.c | 3 +++
>> arch/mips/kvm/mips.c | 3 +++
>> arch/powerpc/kvm/powerpc.c | 6 ++++++
>> arch/riscv/kvm/vm.c | 3 +++
>> arch/s390/kvm/kvm-s390.c | 3 +++
>> arch/x86/kvm/x86.c | 3 +++
>> virt/kvm/kvm_main.c | 1 -
>> 7 files changed, 21 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
>> index 523bc934fe2f..092f0614bae3 100644
>> --- a/arch/arm64/kvm/arm.c
>> +++ b/arch/arm64/kvm/arm.c
>> @@ -210,6 +210,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm,
>> long ext)
>> case KVM_CAP_SET_GUEST_DEBUG:
>> case KVM_CAP_VCPU_ATTRIBUTES:
>> case KVM_CAP_PTP_KVM:
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> +#endif
>> r = 1;
>> break;
>> case KVM_CAP_SET_GUEST_DEBUG2:
>> diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
>> index a25e0b73ee70..0f3de470a73e 100644
>> --- a/arch/mips/kvm/mips.c
>> +++ b/arch/mips/kvm/mips.c
>> @@ -1071,6 +1071,9 @@ int kvm_vm_ioctl_check_extension(struct kvm
>> *kvm, long ext)
>> case KVM_CAP_READONLY_MEM:
>> case KVM_CAP_SYNC_MMU:
>> case KVM_CAP_IMMEDIATE_EXIT:
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> +#endif
>> r = 1;
>> break;
>> case KVM_CAP_NR_VCPUS:
>> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
>> index 875c30c12db0..87698ffef3be 100644
>> --- a/arch/powerpc/kvm/powerpc.c
>> +++ b/arch/powerpc/kvm/powerpc.c
>> @@ -591,6 +591,12 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm,
>> long ext)
>> break;
>> #endif
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> + r = !xive_enabled();
>> + break;
>> +#endif
>> +
>> case KVM_CAP_PPC_ALLOC_HTAB:
>> r = hv_enabled;
>> break;
>> diff --git a/arch/riscv/kvm/vm.c b/arch/riscv/kvm/vm.c
>> index c768f75279ef..b58579b386bb 100644
>> --- a/arch/riscv/kvm/vm.c
>> +++ b/arch/riscv/kvm/vm.c
>> @@ -63,6 +63,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm,
>> long ext)
>> case KVM_CAP_READONLY_MEM:
>> case KVM_CAP_MP_STATE:
>> case KVM_CAP_IMMEDIATE_EXIT:
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> +#endif
>> r = 1;
>> break;
>> case KVM_CAP_NR_VCPUS:
>> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
>> index 156d1c25a3c1..85e093fc8d13 100644
>> --- a/arch/s390/kvm/kvm-s390.c
>> +++ b/arch/s390/kvm/kvm-s390.c
>> @@ -564,6 +564,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm,
>> long ext)
>> case KVM_CAP_SET_GUEST_DEBUG:
>> case KVM_CAP_S390_DIAG318:
>> case KVM_CAP_S390_MEM_OP_EXTENSION:
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> +#endif
>> r = 1;
>> break;
>> case KVM_CAP_SET_GUEST_DEBUG2:
>> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
>> index 0c0ca599a353..a0a7b769483d 100644
>> --- a/arch/x86/kvm/x86.c
>> +++ b/arch/x86/kvm/x86.c
>> @@ -4273,6 +4273,9 @@ int kvm_vm_ioctl_check_extension(struct kvm
>> *kvm, long ext)
>> case KVM_CAP_SYS_ATTRIBUTES:
>> case KVM_CAP_VAPIC:
>> case KVM_CAP_ENABLE_CAP:
>> +#ifdef CONFIG_HAVE_KVM_IRQFD
>> + case KVM_CAP_IRQFD_RESAMPLE:
>> +#endif
>> r = 1;
>> break;
>> case KVM_CAP_EXIT_HYPERCALL:
>> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
>> index 70e05af5ebea..885e72e668a5 100644
>> --- a/virt/kvm/kvm_main.c
>> +++ b/virt/kvm/kvm_main.c
>> @@ -4293,7 +4293,6 @@ static long
>> kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
>> #endif
>> #ifdef CONFIG_HAVE_KVM_IRQFD
>> case KVM_CAP_IRQFD:
>> - case KVM_CAP_IRQFD_RESAMPLE:
>> #endif
>> case KVM_CAP_IOEVENTFD_ANY_LENGTH:
>> case KVM_CAP_CHECK_EXTENSION_VM:
>
--
Alexey
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next prev parent reply other threads:[~2022-09-13 12:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 7:48 [PATCH kernel] KVM: PPC: Make KVM_CAP_IRQFD_RESAMPLE platform dependent Alexey Kardashevskiy
2022-05-18 6:27 ` Alexey Kardashevskiy
2022-09-13 12:50 ` Alexey Kardashevskiy [this message]
2022-09-16 1:10 ` Nicholas Piggin
2022-09-16 9:00 ` Marc Zyngier
2022-09-16 5:07 ` Anup Patel
2023-03-31 15:17 ` Paolo Bonzini
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