Add two new SMCCC compatible hypercalls for PV lock features:
* ARM_SMCCC_VENDOR_HYP_KVM_PV_LOCK_FUNC_ID: 0x86000001
- KVM_PV_LOCK_FEATURES: 0
- KVM_PV_LOCK_PREEMPTED: 1
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@xxxxxxxxxx>
---
arch/arm64/include/asm/pvlock-abi.h | 16 ++++++++++++++++
include/linux/arm-smccc.h | 10 ++++++++++
2 files changed, 26 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@xxxxxxxxxx>
+ */
+
+#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 2b2c295c9109..081be5f6a6be 100644
--- a/include/linux/arm-smccc.h
+++ b/include/linux/arm-smccc.h
@@ -394,14 +394,24 @@ asmlinkage void __arm_smccc_hvc(unsigned long a0, unsigned long a1,
/* KVM "vendor specific" services */
#define ARM_SMCCC_KVM_FUNC_FEATURES 0
+#define ARM_SMCCC_KVM_FUNC_PV_LOCK 1
#define ARM_SMCCC_KVM_FUNC_FEATURES_2 127
#define ARM_SMCCC_KVM_NUM_FUNCS 128
+#define KVM_PV_LOCK_FEATURES 0
+#define KVM_PV_LOCK_PREEMPTED 1
+
#define ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID \
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
ARM_SMCCC_SMC_32, \
ARM_SMCCC_OWNER_VENDOR_HYP, \
ARM_SMCCC_KVM_FUNC_FEATURES)
+#define ARM_SMCCC_VENDOR_HYP_KVM_PV_LOCK_FUNC_ID \
+ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \
+ ARM_SMCCC_SMC_32, \
+ ARM_SMCCC_OWNER_VENDOR_HYP, \
+ ARM_SMCCC_KVM_FUNC_PV_LOCK)
+
#endif /*__ASSEMBLY__*/
#endif /*__LINUX_ARM_SMCCC_H*/
--
2.19.1
