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dm: add API to set vcpu regs of guest

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Add ioctl parameter and API to set vcpu regs. The guest software
loader will call this API to set guest vcpu registers.

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 2018-09-26 11:13:33 +08:00 committed by wenlingz
parent 3cfbc004f5
commit 853b1c74cb
5 changed files with 84 additions and 0 deletions
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2
devicemodel/core/main.c
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@ -269,6 +269,8 @@ add_cpu(struct vmctx *ctx, int guest_ncpus)
mt_vmm_info[i].mt_vcpu = i;
}
vm_set_vcpu_regs(ctx, &ctx->bsp_regs);
error = pthread_create(&mt_vmm_info[0].mt_thr, NULL,
start_thread, &mt_vmm_info[0]);

6
devicemodel/core/vmmapi.c
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@ -612,6 +612,12 @@ vm_create_vcpu(struct vmctx *ctx, uint16_t vcpu_id)
return error;
}
int
vm_set_vcpu_regs(struct vmctx *ctx, struct acrn_set_vcpu_regs *vcpu_regs)
{
return ioctl(ctx->fd, IC_SET_VCPU_REGS, vcpu_regs);
}
int
vm_get_device_fd(struct vmctx *ctx)
{

71
devicemodel/include/public/acrn_common.h
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@ -269,6 +269,77 @@ struct acrn_create_vcpu {
uint16_t pcpu_id;
} __aligned(8);
struct acrn_gp_regs {
uint64_t rax;
uint64_t rcx;
uint64_t rdx;
uint64_t rbx;
uint64_t rsp;
uint64_t rbp;
uint64_t rsi;
uint64_t rdi;
uint64_t r8;
uint64_t r9;
uint64_t r10;
uint64_t r11;
uint64_t r12;
uint64_t r13;
uint64_t r14;
uint64_t r15;
};
struct acrn_descriptor_ptr {
uint16_t limit;
uint64_t base;
uint16_t reserved[3];
} __attribute__((packed));
struct acrn_vcpu_regs {
struct acrn_gp_regs gprs;
struct acrn_descriptor_ptr gdt;
struct acrn_descriptor_ptr idt;
uint64_t rip;
uint64_t cs_base;
uint64_t cr0;
uint64_t cr4;
uint64_t cr3;
uint64_t ia32_efer;
uint64_t rflags;
uint64_t reserved_64[4];
uint32_t cs_ar;
uint32_t reserved_32[4];
/* don't change the order of following sel */
uint16_t cs_sel;
uint16_t ss_sel;
uint16_t ds_sel;
uint16_t es_sel;
uint16_t fs_sel;
uint16_t gs_sel;
uint16_t ldt_sel;
uint16_t tr_sel;
uint16_t reserved_16[4];
};
/**
* @brief Info to set vcpu state
*
* the pamameter for HC_SET_VCPU_STATE
*/
struct acrn_set_vcpu_regs {
/** the virtual CPU ID for the VCPU to set state */
uint16_t vcpu_id;
/** reserved space to make cpu_state aligned to 8 bytes */
uint16_t reserved0[3];
/** the structure to hold vcpu state */
struct acrn_vcpu_regs vcpu_regs;
} __attribute__((aligned(8)));
/**
* @brief Info to set ioreq buffer for a created VM
*

1
devicemodel/include/public/vhm_ioctl_defs.h
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@ -73,6 +73,7 @@
#define IC_PAUSE_VM _IC_ID(IC_ID, IC_ID_VM_BASE + 0x03)
#define IC_CREATE_VCPU _IC_ID(IC_ID, IC_ID_VM_BASE + 0x04)
#define IC_RESET_VM _IC_ID(IC_ID, IC_ID_VM_BASE + 0x05)
#define IC_SET_VCPU_REGS _IC_ID(IC_ID, IC_ID_VM_BASE + 0x06)
/* IRQ and Interrupts */
#define IC_ID_IRQ_BASE 0x20UL

4
devicemodel/include/vmmapi.h
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@ -64,6 +64,9 @@ struct vmctx {
void *vrtc;
void *vpit;
void *ioc_dev;
/* BSP state. guest loader needs to fill it */
struct acrn_set_vcpu_regs bsp_regs;
};
/*
@ -148,6 +151,7 @@ int vm_set_ptdev_intx_info(struct vmctx *ctx, uint16_t virt_bdf,
int vm_reset_ptdev_intx_info(struct vmctx *ctx, int virt_pin, bool pic_pin);
int vm_create_vcpu(struct vmctx *ctx, uint16_t vcpu_id);
int vm_set_vcpu_regs(struct vmctx *ctx, struct acrn_set_vcpu_regs *cpu_regs);
int vm_get_cpu_state(struct vmctx *ctx, void *state_buf);
int vm_intr_monitor(struct vmctx *ctx, void *intr_buf);