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From: Jianyong Wu <jianyong.wu@arm.com>
To: netdev@vger.kernel.org, yangbo.lu@nxp.com,
	john.stultz@linaro.org, tglx@linutronix.de, pbonzini@redhat.com,
	sean.j.christopherson@intel.com, maz@kernel.org,
	richardcochran@gmail.com, Mark.Rutland@arm.com,
	Will.Deacon@arm.com, suzuki.poulose@arm.com
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
	Steve.Capper@arm.com, Kaly.Xin@arm.com, justin.he@arm.com,
	jianyong.wu@arm.com, nd@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH v3 6/6] kvm: arm64: Add capability check extension for ptp_kvm
Date: Wed, 18 Sep 2019 04:07:16 -0400	[thread overview]
Message-ID: <20190918080716.64242-7-jianyong.wu@arm.com> (raw)
In-Reply-To: <20190918080716.64242-1-jianyong.wu@arm.com>

Let userspace check if there is kvm ptp service in host.
before VMs migrate to a another host, VMM may check if this
cap is available to determine the migration behaviour.

Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Suggested-by: Marc Zyngier <maz@kernel.org>
---
 include/uapi/linux/kvm.h | 1 +
 virt/kvm/arm/arm.c       | 1 +
 2 files changed, 2 insertions(+)

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 2fe12b40d503..a0bff6002bd9 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -993,6 +993,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_ARM_SVE 170
 #define KVM_CAP_ARM_PTRAUTH_ADDRESS 171
 #define KVM_CAP_ARM_PTRAUTH_GENERIC 172
+#define KVM_CAP_ARM_KVM_PTP 173
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c
index bd5c55916d0d..80999985160b 100644
--- a/virt/kvm/arm/arm.c
+++ b/virt/kvm/arm/arm.c
@@ -201,6 +201,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_MP_STATE:
 	case KVM_CAP_IMMEDIATE_EXIT:
 	case KVM_CAP_VCPU_EVENTS:
+	case KVM_CAP_ARM_KVM_PTP:
 		r = 1;
 		break;
 	case KVM_CAP_ARM_SET_DEVICE_ADDR:
-- 
2.17.1


      parent reply	other threads:[~2019-09-18  8:08 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-18  8:07 [RFC PATCH v3 0/6] Enable ptp_kvm for arm64 Jianyong Wu
2019-09-18  8:07 ` [RFC PATCH v3 1/6] psci: Export psci_ops.conduit symbol as modules will use it Jianyong Wu
2019-09-18  8:07 ` [RFC PATCH v3 2/6] ptp: Reorganize ptp_kvm modules to make it arch-independent Jianyong Wu
2019-09-18  8:07 ` [RFC PATCH v3 3/6] timekeeping: Expose API allowing retrival of current clocksource and counter value Jianyong Wu
2019-09-18  8:29   ` Paolo Bonzini
2019-09-18  8:07 ` [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm Jianyong Wu
2019-09-18  8:25   ` Paolo Bonzini
2019-09-18  9:57     ` Jianyong Wu (Arm Technology China)
2019-09-18 10:23       ` Paolo Bonzini
2019-09-19  9:46         ` Jianyong Wu (Arm Technology China)
2019-09-19 11:07           ` Paolo Bonzini
2019-09-19 11:39             ` Marc Zyngier
2019-09-19 12:13               ` Paolo Bonzini
2019-09-23  3:19                 ` Jianyong Wu (Arm Technology China)
2019-10-09  5:21                 ` Jianyong Wu (Arm Technology China)
2019-10-09  6:36                   ` Paolo Bonzini
2019-10-09  8:18                     ` Jianyong Wu (Arm Technology China)
2019-10-09  9:13                       ` Paolo Bonzini
2019-10-09 16:05                         ` John Stultz
2019-10-09 20:56                           ` Paolo Bonzini
2019-10-14  5:50                         ` Jianyong Wu (Arm Technology China)
2019-10-14  6:58                           ` Paolo Bonzini
2019-09-23  4:57             ` Jianyong Wu (Arm Technology China)
2019-09-24 14:20               ` Paolo Bonzini
2019-09-25 10:27                 ` Jianyong Wu (Arm Technology China)
2019-09-18  8:07 ` [RFC PATCH v3 5/6] ptp: arm64: Enable ptp_kvm for arm64 Jianyong Wu
2019-09-18  8:07 ` Jianyong Wu [this message]

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