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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@kernel.org,
	suzuki.poulose@arm.com, steven.price@arm.com
Cc: justin.he@arm.com, Wei.Chen@arm.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, nd@arm.com,
	kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v13 9/9] arm64: Add kvm capability check extension for ptp_kvm
Date: Fri, 19 Jun 2020 21:01:20 +0800	[thread overview]
Message-ID: <20200619130120.40556-10-jianyong.wu@arm.com> (raw)
In-Reply-To: <20200619130120.40556-1-jianyong.wu@arm.com>

Let userspace check if there is kvm ptp service in host.
Before VMs migrate to another host, VMM may check if this
cap is available to determine the next behavior.

Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Suggested-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/arm.c     | 4 ++++
 include/uapi/linux/kvm.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 90cb90561446..f41e84346468 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -194,6 +194,10 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2:
 	case KVM_CAP_ARM_NISV_TO_USER:
 	case KVM_CAP_ARM_INJECT_EXT_DABT:
+
+#ifdef CONFIG_ARM64_KVM_PTP_HOST
+	case KVM_CAP_ARM_KVM_PTP:
+#endif
 		r = 1;
 		break;
 	case KVM_CAP_ARM_SET_DEVICE_ADDR:
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 4fdf30316582..f3d4b00dac57 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1031,6 +1031,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_PPC_SECURE_GUEST 181
 #define KVM_CAP_HALT_POLL 182
 #define KVM_CAP_ASYNC_PF_INT 183
+#define KVM_CAP_ARM_KVM_PTP 184
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.17.1

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      parent reply	other threads:[~2020-06-19 13:02 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-19 13:01 [PATCH v13 0/9] Enable ptp_kvm for arm64 Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 1/9] arm64: Probe for the presence of KVM hypervisor services during boot Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 2/9] arm/arm64: KVM: Advertise KVM UID to guests via SMCCC Jianyong Wu
2020-07-27  3:45   ` Jianyong Wu
2020-07-27 11:38     ` Will Deacon
2020-07-28  1:07       ` Jianyong Wu
2020-08-20  9:43         ` Will Deacon
2020-06-19 13:01 ` [PATCH v13 3/9] smccc: Export smccc conduit get helper Jianyong Wu
2020-06-19 13:57   ` Christoph Hellwig
2020-06-22  1:29     ` Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 4/9] ptp: Reorganize ptp_kvm module to make it arch-independent Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 5/9] time: Add mechanism to recognize clocksource in time_get_snapshot Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 6/9] clocksource: Add clocksource id for arm arch counter Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 7/9] arm64/kvm: Add hypercall service for kvm ptp Jianyong Wu
2020-06-19 13:01 ` [PATCH v13 8/9] ptp: arm64: Enable ptp_kvm for arm64 Jianyong Wu
2020-06-19 13:01 ` Jianyong Wu [this message]

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