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hv: add function to set AP entry

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With reset_vcpu_regs as pre-condition, we only need to set
cs_selector and cs_base for AP.

We call set_ap_entry in two places:
 1. When emulation AP SIPI
 2. When sos BSP resume from S3. The BSP is resumed to real
    mode with entry set to wakeup_vec. We call set_ap_entry
    API here with entry twisted from wakeup_vec.

Tracked-On: #1231
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yin Fengwei 2018-09-29 20:58:51 +08:00 committed by wenlingz
parent f7b11c8341
commit 26627bd1fc
4 changed files with 21 additions and 5 deletions
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11
hypervisor/arch/x86/guest/vcpu.c
View File

@ -252,6 +252,17 @@ void reset_vcpu_regs(struct vcpu *vcpu)
set_vcpu_regs(vcpu, &realmode_init_regs);
}
void set_ap_entry(struct vcpu *vcpu, uint64_t entry)
{
struct ext_context *ectx;
ectx = &(vcpu->arch_vcpu.contexts[vcpu->arch_vcpu.cur_context].ext_ctx);
ectx->cs.selector = (uint16_t)((entry >> 4UL) & 0xFFFFU);
ectx->cs.base = ectx->cs.selector << 4UL;
vcpu_set_rip(vcpu, 0UL);
}
/***********************************************************************
*
* @pre vm != NULL && rtn_vcpu_handle != NULL

4
hypervisor/arch/x86/guest/vlapic.c
View File

@ -1207,11 +1207,11 @@ vlapic_icrlo_write_handler(struct acrn_vlapic *vlapic)
continue;
}
target_vcpu->arch_vcpu.cpu_mode = CPU_MODE_REAL;
target_vcpu->arch_vcpu.sipi_vector = vec;
pr_err("Start Secondary VCPU%hu for VM[%d]...",
target_vcpu->vcpu_id,
target_vcpu->vm->vm_id);
target_vcpu->arch_vcpu.cpu_mode = CPU_MODE_REAL;
set_ap_entry(target_vcpu, vec << 12U);
schedule_vcpu(target_vcpu);
} else if (mode == APIC_DELMODE_SMI) {
pr_info("vlapic: SMI IPI do not support\n");

10
hypervisor/arch/x86/guest/vm.c
View File

@ -374,10 +374,14 @@ void resume_vm_from_s3(struct vm *vm, uint32_t wakeup_vec)
vm->state = VM_STARTED;
reset_vcpu(bsp);
bsp->entry_addr = (void *)(uint64_t)wakeup_vec;
bsp->arch_vcpu.cpu_mode = CPU_MODE_REAL;
init_vmcs(bsp);
/* When SOS resume from S3, it will return to real mode
* with entry set to wakeup_vec.
*/
bsp->arch_vcpu.cpu_mode = CPU_MODE_REAL;
set_ap_entry(bsp, wakeup_vec);
init_vmcs(bsp);
schedule_vcpu(bsp);
}

1
hypervisor/include/arch/x86/guest/vcpu.h
View File

@ -287,6 +287,7 @@ uint64_t vcpu_get_pat_ext(struct vcpu *vcpu);
void vcpu_set_pat_ext(struct vcpu *vcpu, uint64_t val);
void set_vcpu_regs(struct vcpu *vcpu, struct acrn_vcpu_regs *vcpu_regs);
void reset_vcpu_regs(struct vcpu *vcpu);
void set_ap_entry(struct vcpu *vcpu, uint64_t entry);
static inline bool is_long_mode(struct vcpu *vcpu)
{