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trusty: Simulate Secure Monitor Call(SMC) by Hypercall

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For ARM, The SMC instruction is used to generate a synchronous
exception that is handled by Secure Monitor code running in EL3.
In the ARM architecture, synchronous control is transferred between
the normal Non-secure state and the Secure state through Secure
Monitor Call exceptions. SMC exceptions are generated by the SMC
instruction, and handled by the Secure Monitor.The operation of
the Secure Monitor is determined by the parameters that are passed
in through registers.

For ACRN, Hypervisor will simulate SMC by hypercall to switch vCPU
State between Normal World and Secure World.
There are 4 registers(RDI, RSI, RDX, RBX) reserved for paramters
passing between Normal World and Secure World.

Signed-off-by: Qi Yadong <yadong.qi@intel.com>
This commit is contained in:
Qi Yadong
2018-03-27 17:26:38 +08:00
committed by Jack Ren
parent 0d9d628d9a
commit 1fd07ba349
8 changed files with 235 additions and 0 deletions
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2
hypervisor/include/arch/x86/trusty.h
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@@ -128,5 +128,7 @@ struct secure_world_control {
struct secure_world_memory sworld_memory;
};
void switch_world(struct vcpu *vcpu, int next_world);
#endif /* TRUSTY_H_ */

10
hypervisor/include/common/hypercall.h
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@@ -39,6 +39,7 @@
struct vhm_request;
bool is_hypercall_from_ring0(void);
int acrn_insert_request_wait(struct vcpu *vcpu, struct vhm_request *req);
int acrn_insert_request_nowait(struct vcpu *vcpu, struct vhm_request *req);
int get_req_info(char *str, int str_max);
@@ -325,6 +326,15 @@ int64_t hcall_reset_ptdev_intr_info(struct vm *vm, uint64_t vmid,
*/
int64_t hcall_setup_sbuf(struct vm *vm, uint64_t param);
/**
* @brief Switch VCPU state between Normal/Secure World.
*
* @param VCPU Pointer to VCPU data structure
*
* @return 0 on success, non-zero on error.
*/
int64_t hcall_world_switch(struct vcpu *vcpu);
/**
* @}
*/

1
hypervisor/include/public/acrn_hv_defs.h
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@@ -229,4 +229,5 @@ struct hc_api_version {
/**
* @}
*/
#endif /* ACRN_HV_DEFS_H */