From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([209.51.188.92]:34623) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gmFZY-0001WZ-82 for qemu-devel@nongnu.org; Wed, 23 Jan 2019 05:15:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gmFZT-0007J9-W1 for qemu-devel@nongnu.org; Wed, 23 Jan 2019 05:15:50 -0500 From: Eric Auger Date: Wed, 23 Jan 2019 11:14:47 +0100 Message-Id: <20190123101458.12478-8-eric.auger@redhat.com> In-Reply-To: <20190123101458.12478-1-eric.auger@redhat.com> References: <20190123101458.12478-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v5 07/18] kvm: add kvm_arm_get_max_vm_phys_shift List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, shameerali.kolothum.thodi@huawei.com, imammedo@redhat.com, david@redhat.com Cc: dgilbert@redhat.com, david@gibson.dropbear.id.au, drjones@redhat.com Add the kvm_arm_get_max_vm_phys_shift() helper that returns the log of the maximum IPA size supported by KVM. This capability needs to be known to create the VM with a specific IPA max size (kvm_type passed along KVM_CREATE_VM ioctl. Signed-off-by: Eric Auger --- v3 -> v4: - s/s/ms in kvm_arm_get_max_vm_phys_shift function comment - check KVM_CAP_ARM_VM_IPA_SIZE extension v1 -> v2: - put this in ARM specific code --- target/arm/kvm.c | 8 ++++++++ target/arm/kvm_arm.h | 16 ++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/target/arm/kvm.c b/target/arm/kvm.c index e00ccf9c98..877c588ef5 100644 --- a/target/arm/kvm.c +++ b/target/arm/kvm.c @@ -18,6 +18,7 @@ #include "qemu/error-report.h" #include "sysemu/sysemu.h" #include "sysemu/kvm.h" +#include "sysemu/kvm_int.h" #include "kvm_arm.h" #include "cpu.h" #include "trace.h" @@ -162,6 +163,13 @@ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu) env->features =3D arm_host_cpu_features.features; } =20 +int kvm_arm_get_max_vm_phys_shift(MachineState *ms) +{ + KVMState *s =3D KVM_STATE(ms->accelerator); + + return kvm_check_extension(s, KVM_CAP_ARM_VM_IPA_SIZE); +} + int kvm_arch_init(MachineState *ms, KVMState *s) { /* For ARM interrupt delivery is always asynchronous, diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h index 6393455b1d..5969c41f83 100644 --- a/target/arm/kvm_arm.h +++ b/target/arm/kvm_arm.h @@ -207,6 +207,17 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeature= s *ahcf); */ void kvm_arm_set_cpu_features_from_host(ARMCPU *cpu); =20 +/** + * kvm_arm_get_max_vm_phys_shift - Returns log2 of the max IPA size + * supported by KVM + * + * @ms: Machine state handle + * + * Return the max number of IPA bits or a negative value if + * the host kernel does not expose this value. + */ +int kvm_arm_get_max_vm_phys_shift(MachineState *ms); + /** * kvm_arm_sync_mpstate_to_kvm * @cpu: ARMCPU @@ -239,6 +250,11 @@ static inline void kvm_arm_set_cpu_features_from_hos= t(ARMCPU *cpu) cpu->host_cpu_probe_failed =3D true; } =20 +static inline int kvm_arm_get_max_vm_phys_shift(MachineState *ms) +{ + return -ENOENT; +} + static inline int kvm_arm_vgic_probe(void) { return 0; --=20 2.20.1