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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: <yezengruan@huawei.com>, <maz@kernel.org>, <james.morse@arm.com>,
	<linux@armlinux.org.uk>, <suzuki.poulose@arm.com>,
	<julien.thierry.kdev@gmail.com>, <catalin.marinas@arm.com>,
	<mark.rutland@arm.com>, <will@kernel.org>, <steven.price@arm.com>,
	<daniel.lezcano@linaro.org>
Subject: [PATCH v2 2/6] KVM: arm64: Add SMCCC paravirtualised lock calls
Date: Thu, 26 Dec 2019 21:58:29 +0800
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



  parent reply index

Thread overview: 18+ 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

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