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Tsirkin" , Cornelia Huck , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Subject: [PATCH v3 03/14] s390x/s390-virtio-hcall: prepare for more diag500 hypercalls Date: Thu, 19 Dec 2024 15:41:04 +0100 Message-ID: <20241219144115.2820241-4-david@redhat.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241219144115.2820241-1-david@redhat.com> References: <20241219144115.2820241-1-david@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=dhildenb@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 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_H2=-1.116, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=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: 1734625420841116600 Content-Type: text/plain; charset="utf-8" Let's generalize, abstracting the virtio bits. diag500 is now a generic hypercall to handle QEMU/KVM specific things. Explicitly specify all already defined subcodes, including legacy ones (so we know what we can use for new hypercalls). Move the PGM_SPECIFICATION injection into the renamed function handle_diag_500(), so we can turn it into a void function. We'll rename the files separately, so git properly detects the rename. Message-ID: <20241008105455.2302628-4-david@redhat.com> Acked-by: Michael S. Tsirkin Reviewed-by: Thomas Huth Signed-off-by: David Hildenbrand --- hw/s390x/s390-virtio-hcall.c | 15 ++++++++------- hw/s390x/s390-virtio-hcall.h | 11 ++++++----- target/s390x/kvm/kvm.c | 20 +++----------------- target/s390x/tcg/misc_helper.c | 5 +++-- 4 files changed, 20 insertions(+), 31 deletions(-) diff --git a/hw/s390x/s390-virtio-hcall.c b/hw/s390x/s390-virtio-hcall.c index ca49e3cd22..5fb78a719e 100644 --- a/hw/s390x/s390-virtio-hcall.c +++ b/hw/s390x/s390-virtio-hcall.c @@ -1,5 +1,5 @@ /* - * Support for virtio hypercalls on s390 + * Support for QEMU/KVM hypercalls on s390 * * Copyright 2012 IBM Corp. * Author(s): Cornelia Huck @@ -57,18 +57,19 @@ static int handle_virtio_ccw_notify(uint64_t subch_id, = uint64_t data) return 0; } =20 -int s390_virtio_hypercall(CPUS390XState *env) +void handle_diag_500(S390CPU *cpu, uintptr_t ra) { + CPUS390XState *env =3D &cpu->env; const uint64_t subcode =3D env->regs[1]; =20 switch (subcode) { - case KVM_S390_VIRTIO_NOTIFY: + case DIAG500_VIRTIO_NOTIFY: env->regs[2] =3D handle_virtio_notify(env->regs[2]); - return 0; - case KVM_S390_VIRTIO_CCW_NOTIFY: + break; + case DIAG500_VIRTIO_CCW_NOTIFY: env->regs[2] =3D handle_virtio_ccw_notify(env->regs[2], env->regs[= 3]); - return 0; + break; default: - return -EINVAL; + s390_program_interrupt(env, PGM_SPECIFICATION, ra); } } diff --git a/hw/s390x/s390-virtio-hcall.h b/hw/s390x/s390-virtio-hcall.h index 3d9fe147d2..dca456b926 100644 --- a/hw/s390x/s390-virtio-hcall.h +++ b/hw/s390x/s390-virtio-hcall.h @@ -1,5 +1,5 @@ /* - * Support for virtio hypercalls on s390x + * Support for QEMU/KVM hypercalls on s390x * * Copyright IBM Corp. 2012, 2017 * Author(s): Cornelia Huck @@ -12,12 +12,13 @@ #ifndef HW_S390_VIRTIO_HCALL_H #define HW_S390_VIRTIO_HCALL_H =20 -#include "standard-headers/asm-s390/virtio-ccw.h" #include "cpu.h" =20 -/* The only thing that we need from the old kvm_virtio.h file */ -#define KVM_S390_VIRTIO_NOTIFY 0 +#define DIAG500_VIRTIO_NOTIFY 0 /* legacy, implemented as a NOP = */ +#define DIAG500_VIRTIO_RESET 1 /* legacy */ +#define DIAG500_VIRTIO_SET_STATUS 2 /* legacy */ +#define DIAG500_VIRTIO_CCW_NOTIFY 3 /* KVM_S390_VIRTIO_CCW_NOTIFY */ =20 -int s390_virtio_hypercall(CPUS390XState *env); +void handle_diag_500(S390CPU *cpu, uintptr_t ra); =20 #endif /* HW_S390_VIRTIO_HCALL_H */ diff --git a/target/s390x/kvm/kvm.c b/target/s390x/kvm/kvm.c index 32cf70bb19..508403609f 100644 --- a/target/s390x/kvm/kvm.c +++ b/target/s390x/kvm/kvm.c @@ -1492,22 +1492,6 @@ static int handle_e3(S390CPU *cpu, struct kvm_run *r= un, uint8_t ipbl) return r; } =20 -static int handle_hypercall(S390CPU *cpu, struct kvm_run *run) -{ - CPUS390XState *env =3D &cpu->env; - int ret =3D -EINVAL; - -#ifdef CONFIG_S390_CCW_VIRTIO - ret =3D s390_virtio_hypercall(env); -#endif /* CONFIG_S390_CCW_VIRTIO */ - if (ret =3D=3D -EINVAL) { - kvm_s390_program_interrupt(cpu, PGM_SPECIFICATION); - return 0; - } - - return ret; -} - static void kvm_handle_diag_288(S390CPU *cpu, struct kvm_run *run) { uint64_t r1, r3; @@ -1603,9 +1587,11 @@ static int handle_diag(S390CPU *cpu, struct kvm_run = *run, uint32_t ipb) case DIAG_SET_CONTROL_PROGRAM_CODES: handle_diag_318(cpu, run); break; +#ifdef CONFIG_S390_CCW_VIRTIO case DIAG_KVM_HYPERCALL: - r =3D handle_hypercall(cpu, run); + handle_diag_500(cpu, RA_IGNORED); break; +#endif /* CONFIG_S390_CCW_VIRTIO */ case DIAG_KVM_BREAKPOINT: r =3D handle_sw_breakpoint(cpu, run); break; diff --git a/target/s390x/tcg/misc_helper.c b/target/s390x/tcg/misc_helper.c index f44136a568..2b4310003b 100644 --- a/target/s390x/tcg/misc_helper.c +++ b/target/s390x/tcg/misc_helper.c @@ -119,10 +119,11 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, ui= nt32_t r3, uint32_t num) switch (num) { #ifdef CONFIG_S390_CCW_VIRTIO case 0x500: - /* KVM hypercall */ + /* QEMU/KVM hypercall */ bql_lock(); - r =3D s390_virtio_hypercall(env); + handle_diag_500(env_archcpu(env), GETPC()); bql_unlock(); + r =3D 0; break; #endif /* CONFIG_S390_CCW_VIRTIO */ case 0x44: --=20 2.47.1