From: Zengruan Ye <yezengruan@huawei.com>
To: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <kvm@vger.kernel.org>,
<linux-doc@vger.kernel.org>,
<virtualization@lists.linux-foundation.org>
Cc: maz@kernel.org, daniel.lezcano@linaro.org, linux@armlinux.org.uk,
steven.price@arm.com, yezengruan@huawei.com,
catalin.marinas@arm.com, will@kernel.org
Subject: [PATCH v2 2/6] KVM: arm64: Add SMCCC paravirtualised lock calls
Date: Thu, 26 Dec 2019 21:58:29 +0800 [thread overview]
Message-ID: <20191226135833.1052-3-yezengruan@huawei.com> (raw)
In-Reply-To: <20191226135833.1052-1-yezengruan@huawei.com>
Add two new SMCCC compatible hypercalls for PV lock features:
PV_LOCK_FEATURES: 0xC6000020
PV_LOCK_PREEMPTED: 0xC6000021
Also add the header file which defines the ABI for the paravirtualized
lock features we're about to add.
Signed-off-by: Zengruan Ye <yezengruan@huawei.com>
---
arch/arm64/include/asm/pvlock-abi.h | 16 ++++++++++++++++
include/linux/arm-smccc.h | 14 ++++++++++++++
2 files changed, 30 insertions(+)
create mode 100644 arch/arm64/include/asm/pvlock-abi.h
diff --git a/arch/arm64/include/asm/pvlock-abi.h b/arch/arm64/include/asm/pvlock-abi.h
new file mode 100644
index 000000000000..06e0c3d7710a
--- /dev/null
+++ b/arch/arm64/include/asm/pvlock-abi.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright(c) 2019 Huawei Technologies Co., Ltd
+ * Author: Zengruan Ye <yezengruan@huawei.com>
+ */
+
+#ifndef __ASM_PVLOCK_ABI_H
+#define __ASM_PVLOCK_ABI_H
+
+struct pvlock_vcpu_state {
+ __le64 preempted;
+ /* Structure must be 64 byte aligned, pad to that size */
+ u8 padding[56];
+} __packed;
+
+#endif
diff --git a/include/linux/arm-smccc.h b/include/linux/arm-smccc.h
index 59494df0f55b..3a5c6b35492f 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -46,6 +46,7 @@
#define ARM_SMCCC_OWNER_OEM 3
#define ARM_SMCCC_OWNER_STANDARD 4
#define ARM_SMCCC_OWNER_STANDARD_HYP 5
+#define ARM_SMCCC_OWNER_VENDOR_HYP 6
#define ARM_SMCCC_OWNER_TRUSTED_APP 48
#define ARM_SMCCC_OWNER_TRUSTED_APP_END 49
#define ARM_SMCCC_OWNER_TRUSTED_OS 50
@@ -377,5 +378,18 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
ARM_SMCCC_OWNER_STANDARD_HYP, \
0x21)
+/* Paravirtualised lock calls */
+#define ARM_SMCCC_HV_PV_LOCK_FEATURES \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
+ ARM_SMCCC_SMC_64, \
+ ARM_SMCCC_OWNER_VENDOR_HYP, \
+ 0x20)
+
+#define ARM_SMCCC_HV_PV_LOCK_PREEMPTED \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
+ ARM_SMCCC_SMC_64, \
+ ARM_SMCCC_OWNER_VENDOR_HYP, \
+ 0x21)
+
#endif /*__ASSEMBLY__*/
#endif /*__LINUX_ARM_SMCCC_H*/
--
2.19.1
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next prev parent reply other threads:[~2019-12-26 13:59 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-26 13:58 [PATCH v2 0/6] KVM: arm64: VCPU preempted check support Zengruan Ye
2019-12-26 13:58 ` [PATCH v2 1/6] KVM: arm64: Document PV-lock interface Zengruan Ye
2020-01-09 14:53 ` Steven Price
2020-01-11 6:51 ` yezengruan
2019-12-26 13:58 ` Zengruan Ye [this message]
2019-12-26 13:58 ` [PATCH v2 3/6] KVM: arm64: Support pvlock preempted via shared structure Zengruan Ye
2020-01-09 15:02 ` Steven Price
2020-01-11 7:30 ` yezengruan
2020-01-13 10:31 ` Steven Price
2019-12-26 13:58 ` [PATCH v2 4/6] KVM: arm64: Provide VCPU attributes for PV lock Zengruan Ye
2019-12-26 13:58 ` [PATCH v2 5/6] KVM: arm64: Add interface to support VCPU preempted check Zengruan Ye
2019-12-26 18:51 ` kbuild test robot
2019-12-27 6:52 ` yezengruan
2019-12-26 13:58 ` [PATCH v2 6/6] KVM: arm64: Support the VCPU preemption check Zengruan Ye
2020-01-09 15:09 ` Steven Price
2020-01-11 7:33 ` yezengruan
2020-01-13 12:12 ` [PATCH v2 0/6] KVM: arm64: VCPU preempted check support Will Deacon
2020-01-15 14:14 ` Marc Zyngier
2020-12-16 8:45 ` yezengruan
2020-12-29 8:50 ` yezengruan
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