[root@jay-linux qemu-kvm.git]# ./configure --help
Usage: configure [options]
Options: [defaults in brackets after descriptions]
Standard options:
--help print this message
--prefix=PREFIX install in PREFIX [/usr/local]
--interp-prefix=PREFIX where to find shared libraries, etc.
use %M for cpu name [/usr/gnemul/qemu-%M]
--target-list=LIST set target list (default: build everything)
Available targets: i386-softmmu x86_64-softmmu
<!- 此处省略百余行帮助信息的输出 ->
--disable-guest-agent disable building of the QEMU Guest Agent
--enable-guest-agent enable building of the QEMU Guest Agent
--with-coroutine=BACKEND coroutine backend. Supported options:
gthread, ucontext, sigaltstack, windows
NOTE: The object files are built at the place where configure is launched
执行configure文件进行配置的过程如下：
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[root@jay-linux qemu-kvm.git]# ./configure
Install prefix /usr/local
BIOS directory /usr/local/share/qemu
binary directory /usr/local/bin
library directory /usr/local/lib
include directory /usr/local/include
config directory /usr/local/etc
Manual directory /usr/local/share/man
ELF interp prefix /usr/gnemul/qemu-%M
Source path /root/kvm_demo/qemu-kvm.git
C compiler gcc
Host C compiler gcc
<!– 此处省略数十行 –>
VNC support yes #通常需要通过VNC连接到客户机中
<!– 此处省略十余行 –>
KVM support yes #这是对KVM的支持
TCG interpreter no
KVM device assig. yes #这是对KVM中VT-d功能的支持
<!– 此处省略十余行 –>
OpenGL support yes
libiscsi support no
build guest agent yes
coroutine backend ucontext
[root@jay-linux qemu-kvm.git]# make -j 20
GEN config-host.h
GEN trace.h
GEN qemu-options.def
GEN qmp-commands.h
GEN qapi-types.h
GEN qapi-visit.h
GEN tests/test-qapi-types.h
GEN tests/test-qapi-visit.h
GEN tests/test-qmp-commands.h
CC libcacard/cac.o
CC libcacard/event.o
<!– 此处省略数百行的编译时输出信息 –>
CC x86_64-softmmu/target-i386/cpu.o
CC x86_64-softmmu/target-i386/machine.o
CC x86_64-softmmu/target-i386/arch_memory_mapping.o
CC x86_64-softmmu/target-i386/arch_dump.o
CC x86_64-softmmu/target-i386/kvm.o
CC x86_64-softmmu/target-i386/hyperv.o
LINK x86_64-softmmu/qemu-system-x86_64
struct kvm_vcpu_arch {
/*
* rip and regs accesses must go through
* kvm_{register,rip}_{read,write} functions.
*/
unsigned long regs[NR_VCPU_REGS];
u32 regs_avail;
u32 regs_dirty;
//类似这些寄存器就是就是用来缓存真正的CPU值的
unsigned long cr0;
unsigned long cr0_guest_owned_bits;
unsigned long cr2;
unsigned long cr3;
unsigned long cr4;
unsigned long cr4_guest_owned_bits;
unsigned long cr8;
u32 hflags;
u64 efer;
u64 apic_base;
struct kvm_lapic *apic; /* kernel irqchip context */
unsigned long apic_attention;
int32_t apic_arb_prio;
int mp_state;
u64 ia32_misc_enable_msr;
bool tpr_access_reporting;
u64 ia32_xss;
/*
* Paging state of the vcpu
*
* If the vcpu runs in guest mode with two level paging this still saves
* the paging mode of the l1 guest. This context is always used to
* handle faults.
*/
struct kvm_mmu mmu; //内存管理，更多的是附带了直接操作函数
/*
* Paging state of an L2 guest (used for nested npt)
*
* This context will save all necessary information to walk page tables
* of the an L2 guest. This context is only initialized for page table
* walking and not for faulting since we never handle l2 page faults on
* the host.
*/
struct kvm_mmu nested_mmu;
/*
* Pointer to the mmu context currently used for
* gva_to_gpa translations.
*/
struct kvm_mmu *walk_mmu;
struct kvm_mmu_memory_cache mmu_pte_list_desc_cache;
struct kvm_mmu_memory_cache mmu_page_cache;
struct kvm_mmu_memory_cache mmu_page_header_cache;
struct fpu guest_fpu;
u64 xcr0;
u64 guest_supported_xcr0;
u32 guest_xstate_size;
struct kvm_pio_request pio;
void *pio_data;
u8 event_exit_inst_len;
struct kvm_queued_exception {
bool pending;
bool has_error_code;
bool reinject;
u8 nr;
u32 error_code;
} exception;
struct kvm_queued_interrupt {
bool pending;
bool soft;
u8 nr;
} interrupt;
int halt_request; /* real mode on Intel only */
int cpuid_nent;
struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
int maxphyaddr;
/* emulate context */
//下面是KVM的软件模拟模式，也就是没有vmx的情况，估计也没人用这一套
struct x86_emulate_ctxt emulate_ctxt;
bool emulate_regs_need_sync_to_vcpu;
bool emulate_regs_need_sync_from_vcpu;
int (*complete_userspace_io)(struct kvm_vcpu *vcpu);
gpa_t time;
struct pvclock_vcpu_time_info hv_clock;
unsigned int hw_tsc_khz;
struct gfn_to_hva_cache pv_time;
bool pv_time_enabled;
/* set guest stopped flag in pvclock flags field */
bool pvclock_set_guest_stopped_request;
struct {
u64 msr_val;
u64 last_steal;
u64 accum_steal;
struct gfn_to_hva_cache stime;
struct kvm_steal_time steal;
} st;
u64 last_guest_tsc;
u64 last_host_tsc;
u64 tsc_offset_adjustment;
u64 this_tsc_nsec;
u64 this_tsc_write;
u64 this_tsc_generation;
bool tsc_catchup;
bool tsc_always_catchup;
s8 virtual_tsc_shift;
u32 virtual_tsc_mult;
u32 virtual_tsc_khz;
s64 ia32_tsc_adjust_msr;
atomic_t nmi_queued; /* unprocessed asynchronous NMIs */
unsigned nmi_pending; /* NMI queued after currently running handler */
bool nmi_injected; /* Trying to inject an NMI this entry */
struct mtrr_state_type mtrr_state;
u64 pat;
unsigned switch_db_regs;
unsigned long db[KVM_NR_DB_REGS];
unsigned long dr6;
unsigned long dr7;
unsigned long eff_db[KVM_NR_DB_REGS];
unsigned long guest_debug_dr7;
u64 mcg_cap;
u64 mcg_status;
u64 mcg_ctl;
u64 *mce_banks;
/* Cache MMIO info */
u64 mmio_gva;
unsigned access;
gfn_t mmio_gfn;
u64 mmio_gen;
struct kvm_pmu pmu;
/* used for guest single stepping over the given code position */
unsigned long singlestep_rip;
/* fields used by HYPER-V emulation */
u64 hv_vapic;
cpumask_var_t wbinvd_dirty_mask;
unsigned long last_retry_eip;
unsigned long last_retry_addr;
struct {
bool halted;
gfn_t gfns[roundup_pow_of_two(ASYNC_PF_PER_VCPU)];
struct gfn_to_hva_cache data;
u64 msr_val;
u32 id;
bool send_user_only;
} apf;
/* OSVW MSRs (AMD only) */
struct {
u64 length;
u64 status;
} osvw;
struct {
u64 msr_val;
struct gfn_to_hva_cache data;
} pv_eoi;
/*
* Indicate whether the access faults on its page table in guest
* which is set when fix page fault and used to detect unhandeable
* instruction.
*/
bool write_fault_to_shadow_pgtable;
/* set at EPT violation at this point */
unsigned long exit_qualification;
/* pv related host specific info */
struct {
bool pv_unhalted;
} pv;
};
