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Wed, 25 Oct 2023 16:27:41 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFHaqMu3EYaR+QZ1Te8CvUU2C5xsfeXRSkM21Gq+jIbIbRpqhJO8yPP1wG0XmKCueu/xlSqsw== X-Received: by 2002:a05:622a:1a0a:b0:419:5775:7d6a with SMTP id f10-20020a05622a1a0a00b0041957757d6amr21183802qtb.16.1698276461019; Wed, 25 Oct 2023 16:27:41 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Manos Pitsidianakis Subject: [PULL 11/24] kvm: require KVM_IRQFD for kernel irqchip Date: Thu, 26 Oct 2023 01:27:04 +0200 Message-ID: <20231025232718.89428-12-pbonzini@redhat.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231025232718.89428-1-pbonzini@redhat.com> References: <20231025232718.89428-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.129.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1698276695688100001 Content-Type: text/plain; charset="utf-8" KVM_IRQFD was introduced in Linux 2.6.32, and since then it has always been available on architectures that support an in-kernel interrupt controller. We can require it unconditionally. Reviewed-by: Manos Pitsidianakis Signed-off-by: Paolo Bonzini --- accel/kvm/kvm-all.c | 13 +++++-------- accel/stubs/kvm-stub.c | 1 - hw/intc/arm_gicv3_its_kvm.c | 2 +- include/sysemu/kvm.h | 6 +++--- target/riscv/kvm/kvm-cpu.c | 2 +- 5 files changed, 10 insertions(+), 14 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 0c7b0569da4..be50d47f7b4 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -91,7 +91,6 @@ bool kvm_split_irqchip; bool kvm_async_interrupts_allowed; bool kvm_halt_in_kernel_allowed; bool kvm_eventfds_allowed; -bool kvm_irqfds_allowed; bool kvm_resamplefds_allowed; bool kvm_msi_via_irqfd_allowed; bool kvm_gsi_routing_allowed; @@ -2128,10 +2127,6 @@ static int kvm_irqchip_assign_irqfd(KVMState *s, Eve= ntNotifier *event, } } =20 - if (!kvm_irqfds_enabled()) { - return -ENOSYS; - } - return kvm_vm_ioctl(s, KVM_IRQFD, &irqfd); } =20 @@ -2292,6 +2287,11 @@ static void kvm_irqchip_create(KVMState *s) return; } =20 + if (kvm_check_extension(s, KVM_CAP_IRQFD) <=3D 0) { + fprintf(stderr, "kvm: irqfd not implemented\n"); + exit(1); + } + /* First probe and see if there's a arch-specific hook to create the * in-kernel irqchip for us */ ret =3D kvm_arch_irqchip_create(s); @@ -2589,9 +2589,6 @@ static int kvm_init(MachineState *ms) kvm_eventfds_allowed =3D (kvm_check_extension(s, KVM_CAP_IOEVENTFD) > 0); =20 - kvm_irqfds_allowed =3D - (kvm_check_extension(s, KVM_CAP_IRQFD) > 0); - kvm_resamplefds_allowed =3D (kvm_check_extension(s, KVM_CAP_IRQFD_RESAMPLE) > 0); =20 diff --git a/accel/stubs/kvm-stub.c b/accel/stubs/kvm-stub.c index bce005adad8..19d58f2778f 100644 --- a/accel/stubs/kvm-stub.c +++ b/accel/stubs/kvm-stub.c @@ -18,7 +18,6 @@ KVMState *kvm_state; bool kvm_kernel_irqchip; bool kvm_async_interrupts_allowed; bool kvm_eventfds_allowed; -bool kvm_irqfds_allowed; bool kvm_resamplefds_allowed; bool kvm_msi_via_irqfd_allowed; bool kvm_gsi_routing_allowed; diff --git a/hw/intc/arm_gicv3_its_kvm.c b/hw/intc/arm_gicv3_its_kvm.c index 61c1cc7bdb8..f7df602cfff 100644 --- a/hw/intc/arm_gicv3_its_kvm.c +++ b/hw/intc/arm_gicv3_its_kvm.c @@ -123,7 +123,7 @@ static void kvm_arm_its_realize(DeviceState *dev, Error= **errp) =20 kvm_msi_use_devid =3D true; kvm_gsi_direct_mapping =3D false; - kvm_msi_via_irqfd_allowed =3D kvm_irqfds_enabled(); + kvm_msi_via_irqfd_allowed =3D true; } =20 /** diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h index 93dccf5dd92..575dee53b39 100644 --- a/include/sysemu/kvm.h +++ b/include/sysemu/kvm.h @@ -37,7 +37,6 @@ extern bool kvm_split_irqchip; extern bool kvm_async_interrupts_allowed; extern bool kvm_halt_in_kernel_allowed; extern bool kvm_eventfds_allowed; -extern bool kvm_irqfds_allowed; extern bool kvm_resamplefds_allowed; extern bool kvm_msi_via_irqfd_allowed; extern bool kvm_gsi_routing_allowed; @@ -102,8 +101,10 @@ extern bool kvm_msi_use_devid; * Returns: true if we can use irqfds to inject interrupts into * a KVM CPU (ie the kernel supports irqfds and we are running * with a configuration where it is meaningful to use them). + * + * Always available if running with in-kernel irqchip. */ -#define kvm_irqfds_enabled() (kvm_irqfds_allowed) +#define kvm_irqfds_enabled() kvm_irqchip_in_kernel() =20 /** * kvm_resamplefds_enabled: @@ -167,7 +168,6 @@ extern bool kvm_msi_use_devid; #define kvm_async_interrupts_enabled() (false) #define kvm_halt_in_kernel() (false) #define kvm_eventfds_enabled() (false) -#define kvm_irqfds_enabled() (false) #define kvm_resamplefds_enabled() (false) #define kvm_msi_via_irqfd_enabled() (false) #define kvm_gsi_routing_allowed() (false) diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c index 090d6176275..26e68c7ab45 100644 --- a/target/riscv/kvm/kvm-cpu.c +++ b/target/riscv/kvm/kvm-cpu.c @@ -1420,7 +1420,7 @@ void kvm_riscv_aia_create(MachineState *machine, uint= 64_t group_shift, exit(1); } =20 - kvm_msi_via_irqfd_allowed =3D kvm_irqfds_enabled(); + kvm_msi_via_irqfd_allowed =3D true; } =20 static void kvm_cpu_instance_init(CPUState *cs) --=20 2.41.0