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virt: acrn: Introduce an ioctl to set vCPU registers state

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A virtual CPU of User VM has different context due to the different
registers state. ACRN userspace needs to set the virtual CPU
registers state (e.g. giving a initial registers state to a virtual
BSP of a User VM).

HSM provides an ioctl ACRN_IOCTL_SET_VCPU_REGS to do the virtual CPU
registers state setting. The ioctl passes the registers state from ACRN
userspace to the hypervisor directly.

Cc: Zhi Wang <zhi.a.wang@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: Yu Wang <yu1.wang@intel.com>
Cc: Reinette Chatre <reinette.chatre@intel.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
Link: https://lore.kernel.org/r/20210207031040.49576-8-shuo.a.liu@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Shuo Liu
2021-02-07 11:10:29 +08:00
committed by Greg Kroah-Hartman
parent 9c5137aedd
commit 2ad2aaee1b
3 changed files with 165 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

119
include/uapi/linux/acrn.h
View File

@@ -38,6 +38,123 @@ struct acrn_vm_creation {
__u64 cpu_affinity;
};
/**
* struct acrn_gp_regs - General registers of a User VM
* @rax: Value of register RAX
* @rcx: Value of register RCX
* @rdx: Value of register RDX
* @rbx: Value of register RBX
* @rsp: Value of register RSP
* @rbp: Value of register RBP
* @rsi: Value of register RSI
* @rdi: Value of register RDI
* @r8: Value of register R8
* @r9: Value of register R9
* @r10: Value of register R10
* @r11: Value of register R11
* @r12: Value of register R12
* @r13: Value of register R13
* @r14: Value of register R14
* @r15: Value of register R15
*/
struct acrn_gp_regs {
__le64 rax;
__le64 rcx;
__le64 rdx;
__le64 rbx;
__le64 rsp;
__le64 rbp;
__le64 rsi;
__le64 rdi;
__le64 r8;
__le64 r9;
__le64 r10;
__le64 r11;
__le64 r12;
__le64 r13;
__le64 r14;
__le64 r15;
};
/**
* struct acrn_descriptor_ptr - Segment descriptor table of a User VM.
* @limit: Limit field.
* @base: Base field.
* @reserved: Reserved and must be 0.
*/
struct acrn_descriptor_ptr {
__le16 limit;
__le64 base;
__le16 reserved[3];
} __attribute__ ((__packed__));
/**
* struct acrn_regs - Registers structure of a User VM
* @gprs: General registers
* @gdt: Global Descriptor Table
* @idt: Interrupt Descriptor Table
* @rip: Value of register RIP
* @cs_base: Base of code segment selector
* @cr0: Value of register CR0
* @cr4: Value of register CR4
* @cr3: Value of register CR3
* @ia32_efer: Value of IA32_EFER MSR
* @rflags: Value of regsiter RFLAGS
* @reserved_64: Reserved and must be 0
* @cs_ar: Attribute field of code segment selector
* @cs_limit: Limit field of code segment selector
* @reserved_32: Reserved and must be 0
* @cs_sel: Value of code segment selector
* @ss_sel: Value of stack segment selector
* @ds_sel: Value of data segment selector
* @es_sel: Value of extra segment selector
* @fs_sel: Value of FS selector
* @gs_sel: Value of GS selector
* @ldt_sel: Value of LDT descriptor selector
* @tr_sel: Value of TSS descriptor selector
*/
struct acrn_regs {
struct acrn_gp_regs gprs;
struct acrn_descriptor_ptr gdt;
struct acrn_descriptor_ptr idt;
__le64 rip;
__le64 cs_base;
__le64 cr0;
__le64 cr4;
__le64 cr3;
__le64 ia32_efer;
__le64 rflags;
__le64 reserved_64[4];
__le32 cs_ar;
__le32 cs_limit;
__le32 reserved_32[3];
__le16 cs_sel;
__le16 ss_sel;
__le16 ds_sel;
__le16 es_sel;
__le16 fs_sel;
__le16 gs_sel;
__le16 ldt_sel;
__le16 tr_sel;
};
/**
* struct acrn_vcpu_regs - Info of vCPU registers state
* @vcpu_id: vCPU ID
* @reserved: Reserved and must be 0
* @vcpu_regs: vCPU registers state
*
* This structure will be passed to hypervisor directly.
*/
struct acrn_vcpu_regs {
__u16 vcpu_id;
__u16 reserved[3];
struct acrn_regs vcpu_regs;
};
/* The ioctl type, documented in ioctl-number.rst */
#define ACRN_IOCTL_TYPE 0xA2
@@ -54,5 +171,7 @@ struct acrn_vm_creation {
_IO(ACRN_IOCTL_TYPE, 0x13)
#define ACRN_IOCTL_RESET_VM \
_IO(ACRN_IOCTL_TYPE, 0x15)
#define ACRN_IOCTL_SET_VCPU_REGS \
_IOW(ACRN_IOCTL_TYPE, 0x16, struct acrn_vcpu_regs)
#endif /* _UAPI_ACRN_H */