new file mode 100644
@@ -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
@@ -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*/
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