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trusty: implement hypercall to initialize trusty

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UOS_Loader will trigger boot of Trusty-OS by HC_INITIALIZE_TRUSTY.
UOS_Loader will load trusty image and alloc runtime memory for
trusty. UOS_Loader will transfer these information include
trusty runtime memory base address, entry address and memory
size to hypervisor by trusty_boot_param structure.

In hypervisor, once HC_INITIALIZE_TRUSTY received, it will create
EPT for Secure World, save Normal World vCPU context, init
Secure World vCPU context and switch World state to Secure World.

Signed-off-by: Qi Yadong <yadong.qi@intel.com>
This commit is contained in:
Qi Yadong
2018-03-27 17:27:51 +08:00
committed by Jack Ren
parent 1fd07ba349
commit b124e0da28
7 changed files with 208 additions and 11 deletions
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18
hypervisor/Documentation/Trusty.txt
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@@ -49,8 +49,8 @@ Note: Trusty OS is running in Secure World in the architecture above.
**************************
Trusty specific Hypercalls
**************************
1. HC_LAUNCH_TRUSTY
->This Hypercall is used by UOSloader (User OS Bootloader) to request ACRN to launch Trusty.
1. HC_INITIALIZE_TRUSTY
->This Hypercall is used by UOS_Loader to request ACRN to initialize Trusty.
->The Trusty memory region range, entry point must be specified.
->Hypervisor needs to save current vCPU contexts (Normal World).
2. HC_WORLD_SWITCH
@@ -60,7 +60,7 @@ Trusty specific Hypercalls
API
---
1. hcall_launch_trusty(vm_t *vm);
1. hcall_initialize_trusty(vm_t *vm);
2. hcall_world_switch(vm_t *vm);
@@ -71,12 +71,12 @@ Per design, UOSloader will trigger boot of Trusty. So the boot flow will be:
UOSloader --> ACRN --> Trusty --> ACRN --> UOSloader
Detail:
1. UOSloader
1. UOS_Loader
1.1 load and verify trusty image from virtual disk.
1.2 allocate runtime memory for trusty.
1.3 do ELF relocation of trusty image and get entry address.
1.4 call HC_LAUNCH_TRUSTY with trusty memory base and entry address.
2. ACRN(HC_LAUNCH_TRUSTY)
1.4 call HC_INITIALIZE_TRUSTY with trusty memory base and entry address.
2. ACRN(HC_INITIALIZE_TRUSTY)
2.1 save World context for Normal World.
2.2 init World context for Secure World(RIP, RSP, EPT, etc.).
2.3 resume to Secure World.
@@ -85,9 +85,9 @@ Detail:
3.2 call HC_WORLD_SWITCH to switch back to Normal World if boot completed.
4. ACRN(HC_WORLD_SWITCH)
4.1 save World context for the World which caused this vmexit(Secure World)
4.2 restore World context for next World(Normal World(UOSloader))
4.3 resume to next World(UOSloader)
5. UOSloader
4.2 restore World context for next World(Normal World(UOS_Loader))
4.3 resume to next World(UOS_Loader)
5. UOS_Loader
5.1 continue to boot.