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 <yezengr...@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 <yezengr...@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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