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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-31 09:30:10 +1100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-31 09:30:10 +1100 |
commit | 2c57ee6f924c95e4dce61ed4776fb3f62e1b9f92 (patch) | |
tree | b9d92e52e8c0ee68a0f5012b470c6146a9f0b65a /include | |
parent | f389e9fcecdec4c4cb890ad28ea30a87a579ec3e (diff) | |
parent | 2f52d58c92d971bf421f461ad06eb93fb4f34981 (diff) | |
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (249 commits)
KVM: Move apic timer migration away from critical section
KVM: Put kvm_para.h include outside __KERNEL__
KVM: Fix unbounded preemption latency
KVM: Initialize the mmu caches only after verifying cpu support
KVM: MMU: Fix dirty page setting for pages removed from rmap
KVM: Portability: Move kvm_fpu to asm-x86/kvm.h
KVM: x86 emulator: Only allow VMCALL/VMMCALL trapped by #UD
KVM: MMU: Merge shadow level check in FNAME(fetch)
KVM: MMU: Move kvm_free_some_pages() into critical section
KVM: MMU: Switch to mmu spinlock
KVM: MMU: Avoid calling gfn_to_page() in mmu_set_spte()
KVM: Add kvm_read_guest_atomic()
KVM: MMU: Concurrent guest walkers
KVM: Disable vapic support on Intel machines with FlexPriority
KVM: Accelerated apic support
KVM: local APIC TPR access reporting facility
KVM: Print data for unimplemented wrmsr
KVM: MMU: Add cache miss statistic
KVM: MMU: Coalesce remote tlb flushes
KVM: Expose ioapic to ia64 save/restore APIs
...
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-x86/Kbuild | 1 | ||||
-rw-r--r-- | include/asm-x86/kvm.h | 191 | ||||
-rw-r--r-- | include/asm-x86/kvm_host.h | 611 | ||||
-rw-r--r-- | include/asm-x86/kvm_para.h | 105 | ||||
-rw-r--r-- | include/asm-x86/kvm_x86_emulate.h | 186 | ||||
-rw-r--r-- | include/linux/Kbuild | 2 | ||||
-rw-r--r-- | include/linux/kvm.h | 203 | ||||
-rw-r--r-- | include/linux/kvm_host.h | 299 | ||||
-rw-r--r-- | include/linux/kvm_para.h | 82 | ||||
-rw-r--r-- | include/linux/kvm_types.h | 54 |
10 files changed, 1518 insertions, 216 deletions
diff --git a/include/asm-x86/Kbuild b/include/asm-x86/Kbuild index e6189b2..3c6f0f8 100644 --- a/include/asm-x86/Kbuild +++ b/include/asm-x86/Kbuild @@ -3,6 +3,7 @@ include include/asm-generic/Kbuild.asm header-y += boot.h header-y += bootparam.h header-y += debugreg.h +header-y += kvm.h header-y += ldt.h header-y += msr-index.h header-y += prctl.h diff --git a/include/asm-x86/kvm.h b/include/asm-x86/kvm.h new file mode 100644 index 0000000..7a71120 --- /dev/null +++ b/include/asm-x86/kvm.h @@ -0,0 +1,191 @@ +#ifndef __LINUX_KVM_X86_H +#define __LINUX_KVM_X86_H + +/* + * KVM x86 specific structures and definitions + * + */ + +#include <asm/types.h> +#include <linux/ioctl.h> + +/* Architectural interrupt line count. */ +#define KVM_NR_INTERRUPTS 256 + +struct kvm_memory_alias { + __u32 slot; /* this has a different namespace than memory slots */ + __u32 flags; + __u64 guest_phys_addr; + __u64 memory_size; + __u64 target_phys_addr; +}; + +/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */ +struct kvm_pic_state { + __u8 last_irr; /* edge detection */ + __u8 irr; /* interrupt request register */ + __u8 imr; /* interrupt mask register */ + __u8 isr; /* interrupt service register */ + __u8 priority_add; /* highest irq priority */ + __u8 irq_base; + __u8 read_reg_select; + __u8 poll; + __u8 special_mask; + __u8 init_state; + __u8 auto_eoi; + __u8 rotate_on_auto_eoi; + __u8 special_fully_nested_mode; + __u8 init4; /* true if 4 byte init */ + __u8 elcr; /* PIIX edge/trigger selection */ + __u8 elcr_mask; +}; + +#define KVM_IOAPIC_NUM_PINS 24 +struct kvm_ioapic_state { + __u64 base_address; + __u32 ioregsel; + __u32 id; + __u32 irr; + __u32 pad; + union { + __u64 bits; + struct { + __u8 vector; + __u8 delivery_mode:3; + __u8 dest_mode:1; + __u8 delivery_status:1; + __u8 polarity:1; + __u8 remote_irr:1; + __u8 trig_mode:1; + __u8 mask:1; + __u8 reserve:7; + __u8 reserved[4]; + __u8 dest_id; + } fields; + } redirtbl[KVM_IOAPIC_NUM_PINS]; +}; + +#define KVM_IRQCHIP_PIC_MASTER 0 +#define KVM_IRQCHIP_PIC_SLAVE 1 +#define KVM_IRQCHIP_IOAPIC 2 + +/* for KVM_GET_REGS and KVM_SET_REGS */ +struct kvm_regs { + /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */ + __u64 rax, rbx, rcx, rdx; + __u64 rsi, rdi, rsp, rbp; + __u64 r8, r9, r10, r11; + __u64 r12, r13, r14, r15; + __u64 rip, rflags; +}; + +/* for KVM_GET_LAPIC and KVM_SET_LAPIC */ +#define KVM_APIC_REG_SIZE 0x400 +struct kvm_lapic_state { + char regs[KVM_APIC_REG_SIZE]; +}; + +struct kvm_segment { + __u64 base; + __u32 limit; + __u16 selector; + __u8 type; + __u8 present, dpl, db, s, l, g, avl; + __u8 unusable; + __u8 padding; +}; + +struct kvm_dtable { + __u64 base; + __u16 limit; + __u16 padding[3]; +}; + + +/* for KVM_GET_SREGS and KVM_SET_SREGS */ +struct kvm_sregs { + /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */ + struct kvm_segment cs, ds, es, fs, gs, ss; + struct kvm_segment tr, ldt; + struct kvm_dtable gdt, idt; + __u64 cr0, cr2, cr3, cr4, cr8; + __u64 efer; + __u64 apic_base; + __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64]; +}; + +/* for KVM_GET_FPU and KVM_SET_FPU */ +struct kvm_fpu { + __u8 fpr[8][16]; + __u16 fcw; + __u16 fsw; + __u8 ftwx; /* in fxsave format */ + __u8 pad1; + __u16 last_opcode; + __u64 last_ip; + __u64 last_dp; + __u8 xmm[16][16]; + __u32 mxcsr; + __u32 pad2; +}; + +struct kvm_msr_entry { + __u32 index; + __u32 reserved; + __u64 data; +}; + +/* for KVM_GET_MSRS and KVM_SET_MSRS */ +struct kvm_msrs { + __u32 nmsrs; /* number of msrs in entries */ + __u32 pad; + + struct kvm_msr_entry entries[0]; +}; + +/* for KVM_GET_MSR_INDEX_LIST */ +struct kvm_msr_list { + __u32 nmsrs; /* number of msrs in entries */ + __u32 indices[0]; +}; + + +struct kvm_cpuid_entry { + __u32 function; + __u32 eax; + __u32 ebx; + __u32 ecx; + __u32 edx; + __u32 padding; +}; + +/* for KVM_SET_CPUID */ +struct kvm_cpuid { + __u32 nent; + __u32 padding; + struct kvm_cpuid_entry entries[0]; +}; + +struct kvm_cpuid_entry2 { + __u32 function; + __u32 index; + __u32 flags; + __u32 eax; + __u32 ebx; + __u32 ecx; + __u32 edx; + __u32 padding[3]; +}; + +#define KVM_CPUID_FLAG_SIGNIFCANT_INDEX 1 +#define KVM_CPUID_FLAG_STATEFUL_FUNC 2 +#define KVM_CPUID_FLAG_STATE_READ_NEXT 4 + +/* for KVM_SET_CPUID2 */ +struct kvm_cpuid2 { + __u32 nent; + __u32 padding; + struct kvm_cpuid_entry2 entries[0]; +}; + +#endif diff --git a/include/asm-x86/kvm_host.h b/include/asm-x86/kvm_host.h new file mode 100644 index 0000000..4702b04 --- /dev/null +++ b/include/asm-x86/kvm_host.h @@ -0,0 +1,611 @@ +#/* + * Kernel-based Virtual Machine driver for Linux + * + * This header defines architecture specific interfaces, x86 version + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef ASM_KVM_HOST_H +#define ASM_KVM_HOST_H + +#include <linux/types.h> +#include <linux/mm.h> + +#include <linux/kvm.h> +#include <linux/kvm_para.h> +#include <linux/kvm_types.h> + +#include <asm/desc.h> + +#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1) +#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD)) +#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS|0xFFFFFF0000000000ULL) + +#define KVM_GUEST_CR0_MASK \ + (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \ + | X86_CR0_NW | X86_CR0_CD) +#define KVM_VM_CR0_ALWAYS_ON \ + (X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \ + | X86_CR0_MP) +#define KVM_GUEST_CR4_MASK \ + (X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE) +#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE) +#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE) + +#define INVALID_PAGE (~(hpa_t)0) +#define UNMAPPED_GVA (~(gpa_t)0) + +#define DE_VECTOR 0 +#define UD_VECTOR 6 +#define NM_VECTOR 7 +#define DF_VECTOR 8 +#define TS_VECTOR 10 +#define NP_VECTOR 11 +#define SS_VECTOR 12 +#define GP_VECTOR 13 +#define PF_VECTOR 14 + +#define SELECTOR_TI_MASK (1 << 2) +#define SELECTOR_RPL_MASK 0x03 + +#define IOPL_SHIFT 12 + +#define KVM_ALIAS_SLOTS 4 + +#define KVM_PERMILLE_MMU_PAGES 20 +#define KVM_MIN_ALLOC_MMU_PAGES 64 +#define KVM_NUM_MMU_PAGES 1024 +#define KVM_MIN_FREE_MMU_PAGES 5 +#define KVM_REFILL_PAGES 25 +#define KVM_MAX_CPUID_ENTRIES 40 + +extern spinlock_t kvm_lock; +extern struct list_head vm_list; + +struct kvm_vcpu; +struct kvm; + +enum { + VCPU_REGS_RAX = 0, + VCPU_REGS_RCX = 1, + VCPU_REGS_RDX = 2, + VCPU_REGS_RBX = 3, + VCPU_REGS_RSP = 4, + VCPU_REGS_RBP = 5, + VCPU_REGS_RSI = 6, + VCPU_REGS_RDI = 7, +#ifdef CONFIG_X86_64 + VCPU_REGS_R8 = 8, + VCPU_REGS_R9 = 9, + VCPU_REGS_R10 = 10, + VCPU_REGS_R11 = 11, + VCPU_REGS_R12 = 12, + VCPU_REGS_R13 = 13, + VCPU_REGS_R14 = 14, + VCPU_REGS_R15 = 15, +#endif + NR_VCPU_REGS +}; + +enum { + VCPU_SREG_CS, + VCPU_SREG_DS, + VCPU_SREG_ES, + VCPU_SREG_FS, + VCPU_SREG_GS, + VCPU_SREG_SS, + VCPU_SREG_TR, + VCPU_SREG_LDTR, +}; + +#include <asm/kvm_x86_emulate.h> + +#define KVM_NR_MEM_OBJS 40 + +/* + * We don't want allocation failures within the mmu code, so we preallocate + * enough memory for a single page fault in a cache. + */ +struct kvm_mmu_memory_cache { + int nobjs; + void *objects[KVM_NR_MEM_OBJS]; +}; + +#define NR_PTE_CHAIN_ENTRIES 5 + +struct kvm_pte_chain { + u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES]; + struct hlist_node link; +}; + +/* + * kvm_mmu_page_role, below, is defined as: + * + * bits 0:3 - total guest paging levels (2-4, or zero for real mode) + * bits 4:7 - page table level for this shadow (1-4) + * bits 8:9 - page table quadrant for 2-level guests + * bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode) + * bits 17:19 - common access permissions for all ptes in this shadow page + */ +union kvm_mmu_page_role { + unsigned word; + struct { + unsigned glevels : 4; + unsigned level : 4; + unsigned quadrant : 2; + unsigned pad_for_nice_hex_output : 6; + unsigned metaphysical : 1; + unsigned access : 3; + }; +}; + +struct kvm_mmu_page { + struct list_head link; + struct hlist_node hash_link; + + /* + * The following two entries are used to key the shadow page in the + * hash table. + */ + gfn_t gfn; + union kvm_mmu_page_role role; + + u64 *spt; + /* hold the gfn of each spte inside spt */ + gfn_t *gfns; + unsigned long slot_bitmap; /* One bit set per slot which has memory + * in this shadow page. + */ + int multimapped; /* More than one parent_pte? */ + int root_count; /* Currently serving as active root */ + union { + u64 *parent_pte; /* !multimapped */ + struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */ + }; +}; + +/* + * x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level + * 32-bit). The kvm_mmu structure abstracts the details of the current mmu + * mode. + */ +struct kvm_mmu { + void (*new_cr3)(struct kvm_vcpu *vcpu); + int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err); + void (*free)(struct kvm_vcpu *vcpu); + gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva); + void (*prefetch_page)(struct kvm_vcpu *vcpu, + struct kvm_mmu_page *page); + hpa_t root_hpa; + int root_level; + int shadow_root_level; + + u64 *pae_root; +}; + +struct kvm_vcpu_arch { + u64 host_tsc; + int interrupt_window_open; + unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */ + DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS); + unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */ + unsigned long rip; /* needs vcpu_load_rsp_rip() */ + + unsigned long cr0; + unsigned long cr2; + unsigned long cr3; + unsigned long cr4; + unsigned long cr8; + u64 pdptrs[4]; /* pae */ + u64 shadow_efer; + u64 apic_base; + struct kvm_lapic *apic; /* kernel irqchip context */ +#define VCPU_MP_STATE_RUNNABLE 0 +#define VCPU_MP_STATE_UNINITIALIZED 1 +#define VCPU_MP_STATE_INIT_RECEIVED 2 +#define VCPU_MP_STATE_SIPI_RECEIVED 3 +#define VCPU_MP_STATE_HALTED 4 + int mp_state; + int sipi_vector; + u64 ia32_misc_enable_msr; + bool tpr_access_reporting; + + struct kvm_mmu mmu; + + struct kvm_mmu_memory_cache mmu_pte_chain_cache; + struct kvm_mmu_memory_cache mmu_rmap_desc_cache; + struct kvm_mmu_memory_cache mmu_page_cache; + struct kvm_mmu_memory_cache mmu_page_header_cache; + + gfn_t last_pt_write_gfn; + int last_pt_write_count; + u64 *last_pte_updated; + + struct { + gfn_t gfn; /* presumed gfn during guest pte update */ + struct page *page; /* page corresponding to that gfn */ + } update_pte; + + struct i387_fxsave_struct host_fx_image; + struct i387_fxsave_struct guest_fx_image; + + gva_t mmio_fault_cr2; + struct kvm_pio_request pio; + void *pio_data; + + struct kvm_queued_exception { + bool pending; + bool has_error_code; + u8 nr; + u32 error_code; + } exception; + + struct { + int active; + u8 save_iopl; + struct kvm_save_segment { + u16 selector; + unsigned long base; + u32 limit; + u32 ar; + } tr, es, ds, fs, gs; + } rmode; + int halt_request; /* real mode on Intel only */ + + int cpuid_nent; + struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES]; + /* emulate context */ + + struct x86_emulate_ctxt emulate_ctxt; +}; + +struct kvm_mem_alias { + gfn_t base_gfn; + unsigned long npages; + gfn_t target_gfn; +}; + +struct kvm_arch{ + int naliases; + struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS]; + + unsigned int n_free_mmu_pages; + unsigned int n_requested_mmu_pages; + unsigned int n_alloc_mmu_pages; + struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES]; + /* + * Hash table of struct kvm_mmu_page. + */ + struct list_head active_mmu_pages; + struct kvm_pic *vpic; + struct kvm_ioapic *vioapic; + + int round_robin_prev_vcpu; + unsigned int tss_addr; + struct page *apic_access_page; +}; + +struct kvm_vm_stat { + u32 mmu_shadow_zapped; + u32 mmu_pte_write; + u32 mmu_pte_updated; + u32 mmu_pde_zapped; + u32 mmu_flooded; + u32 mmu_recycled; + u32 mmu_cache_miss; + u32 remote_tlb_flush; +}; + +struct kvm_vcpu_stat { + u32 pf_fixed; + u32 pf_guest; + u32 tlb_flush; + u32 invlpg; + + u32 exits; + u32 io_exits; + u32 mmio_exits; + u32 signal_exits; + u32 irq_window_exits; + u32 halt_exits; + u32 halt_wakeup; + u32 request_irq_exits; + u32 irq_exits; + u32 host_state_reload; + u32 efer_reload; + u32 fpu_reload; + u32 insn_emulation; + u32 insn_emulation_fail; +}; + +struct descriptor_table { + u16 limit; + unsigned long base; +} __attribute__((packed)); + +struct kvm_x86_ops { + int (*cpu_has_kvm_support)(void); /* __init */ + int (*disabled_by_bios)(void); /* __init */ + void (*hardware_enable)(void *dummy); /* __init */ + void (*hardware_disable)(void *dummy); + void (*check_processor_compatibility)(void *rtn); + int (*hardware_setup)(void); /* __init */ + void (*hardware_unsetup)(void); /* __exit */ + bool (*cpu_has_accelerated_tpr)(void); + + /* Create, but do not attach this VCPU */ + struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id); + void (*vcpu_free)(struct kvm_vcpu *vcpu); + int (*vcpu_reset)(struct kvm_vcpu *vcpu); + + void (*prepare_guest_switch)(struct kvm_vcpu *vcpu); + void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); + void (*vcpu_put)(struct kvm_vcpu *vcpu); + void (*vcpu_decache)(struct kvm_vcpu *vcpu); + + int (*set_guest_debug)(struct kvm_vcpu *vcpu, + struct kvm_debug_guest *dbg); + void (*guest_debug_pre)(struct kvm_vcpu *vcpu); + int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); + int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); + u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); + void (*get_segment)(struct kvm_vcpu *vcpu, + struct kvm_segment *var, int seg); + void (*set_segment)(struct kvm_vcpu *vcpu, + struct kvm_segment *var, int seg); + void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l); + void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu); + void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0); + void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3); + void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4); + void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer); + void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); + void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); + void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); + void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt); + unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr); + void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value, + int *exception); + void (*cache_regs)(struct kvm_vcpu *vcpu); + void (*decache_regs)(struct kvm_vcpu *vcpu); + unsigned long (*get_rflags)(struct kvm_vcpu *vcpu); + void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags); + + void (*tlb_flush)(struct kvm_vcpu *vcpu); + + void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run); + int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu); + void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu); + void (*patch_hypercall)(struct kvm_vcpu *vcpu, + unsigned char *hypercall_addr); + int (*get_irq)(struct kvm_vcpu *vcpu); + void (*set_irq)(struct kvm_vcpu *vcpu, int vec); + void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr, + bool has_error_code, u32 error_code); + bool (*exception_injected)(struct kvm_vcpu *vcpu); + void (*inject_pending_irq)(struct kvm_vcpu *vcpu); + void (*inject_pending_vectors)(struct kvm_vcpu *vcpu, + struct kvm_run *run); + + int (*set_tss_addr)(struct kvm *kvm, unsigned int addr); +}; + +extern struct kvm_x86_ops *kvm_x86_ops; + +int kvm_mmu_module_init(void); +void kvm_mmu_module_exit(void); + +void kvm_mmu_destroy(struct kvm_vcpu *vcpu); +int kvm_mmu_create(struct kvm_vcpu *vcpu); +int kvm_mmu_setup(struct kvm_vcpu *vcpu); +void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte); + +int kvm_mmu_reset_context(struct kvm_vcpu *vcpu); +void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot); +void kvm_mmu_zap_all(struct kvm *kvm); +unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); +void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); + +enum emulation_result { + EMULATE_DONE, /* no further processing */ + EMULATE_DO_MMIO, /* kvm_run filled with mmio request */ + EMULATE_FAIL, /* can't emulate this instruction */ +}; + +#define EMULTYPE_NO_DECODE (1 << 0) +#define EMULTYPE_TRAP_UD (1 << 1) +int emulate_instruction(struct kvm_vcpu *vcpu, struct kvm_run *run, + unsigned long cr2, u16 error_code, int emulation_type); +void kvm_report_emulation_failure(struct kvm_vcpu *cvpu, const char *context); +void realmode_lgdt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); +void realmode_lidt(struct kvm_vcpu *vcpu, u16 size, unsigned long address); +void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, + unsigned long *rflags); + +unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr); +void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long value, + unsigned long *rflags); +int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *data); +int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); + +struct x86_emulate_ctxt; + +int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned port); +int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, + int size, unsigned long count, int down, + gva_t address, int rep, unsigned port); +void kvm_emulate_cpuid(struct kvm_vcpu *vcpu); +int kvm_emulate_halt(struct kvm_vcpu *vcpu); +int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address); +int emulate_clts(struct kvm_vcpu *vcpu); +int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, + unsigned long *dest); +int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, + unsigned long value); + +void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0); +void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr0); +void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr0); +void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr0); +unsigned long get_cr8(struct kvm_vcpu *vcpu); +void lmsw(struct kvm_vcpu *vcpu, unsigned long msw); +void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l); + +int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); +int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data); + +void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr); +void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code); +void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long cr2, + u32 error_code); + +void fx_init(struct kvm_vcpu *vcpu); + +int emulator_read_std(unsigned long addr, + void *val, + unsigned int bytes, + struct kvm_vcpu *vcpu); +int emulator_write_emulated(unsigned long addr, + const void *val, + unsigned int bytes, + struct kvm_vcpu *vcpu); + +unsigned long segment_base(u16 selector); + +void kvm_mmu_flush_tlb(struct kvm_vcpu *vcpu); +void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, + const u8 *new, int bytes); +int kvm_mmu_unprotect_page_virt(struct kvm_vcpu *vcpu, gva_t gva); +void __kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu); +int kvm_mmu_load(struct kvm_vcpu *vcpu); +void kvm_mmu_unload(struct kvm_vcpu *vcpu); + +int kvm_emulate_hypercall(struct kvm_vcpu *vcpu); + +int kvm_fix_hypercall(struct kvm_vcpu *vcpu); + +int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gva_t gva, u32 error_code); + +int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3); +int complete_pio(struct kvm_vcpu *vcpu); + +static inline struct kvm_mmu_page *page_header(hpa_t shadow_page) +{ + struct page *page = pfn_to_page(shadow_page >> PAGE_SHIFT); + + return (struct kvm_mmu_page *)page_private(page); +} + +static inline u16 read_fs(void) +{ + u16 seg; + asm("mov %%fs, %0" : "=g"(seg)); + return seg; +} + +static inline u16 read_gs(void) +{ + u16 seg; + asm("mov %%gs, %0" : "=g"(seg)); + return seg; +} + +static inline u16 read_ldt(void) +{ + u16 ldt; + asm("sldt %0" : "=g"(ldt)); + return ldt; +} + +static inline void load_fs(u16 sel) +{ + asm("mov %0, %%fs" : : "rm"(sel)); +} + +static inline void load_gs(u16 sel) +{ + asm("mov %0, %%gs" : : "rm"(sel)); +} + +#ifndef load_ldt +static inline void load_ldt(u16 sel) +{ + asm("lldt %0" : : "rm"(sel)); +} +#endif + +static inline void get_idt(struct descriptor_table *table) +{ + asm("sidt %0" : "=m"(*table)); +} + +static inline void get_gdt(struct descriptor_table *table) +{ + asm("sgdt %0" : "=m"(*table)); +} + +static inline unsigned long read_tr_base(void) +{ + u16 tr; + asm("str %0" : "=g"(tr)); + return segment_base(tr); +} + +#ifdef CONFIG_X86_64 +static inline unsigned long read_msr(unsigned long msr) +{ + u64 value; + + rdmsrl(msr, value); + return value; +} +#endif + +static inline void fx_save(struct i387_fxsave_struct *image) +{ + asm("fxsave (%0)":: "r" (image)); +} + +static inline void fx_restore(struct i387_fxsave_struct *image) +{ + asm("fxrstor (%0)":: "r" (image)); +} + +static inline void fpu_init(void) +{ + asm("finit"); +} + +static inline u32 get_rdx_init_val(void) +{ + return 0x600; /* P6 family */ +} + +static inline void kvm_inject_gp(struct kvm_vcpu *vcpu, u32 error_code) +{ + kvm_queue_exception_e(vcpu, GP_VECTOR, error_code); +} + +#define ASM_VMX_VMCLEAR_RAX ".byte 0x66, 0x0f, 0xc7, 0x30" +#define ASM_VMX_VMLAUNCH ".byte 0x0f, 0x01, 0xc2" +#define ASM_VMX_VMRESUME ".byte 0x0f, 0x01, 0xc3" +#define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30" +#define ASM_VMX_VMREAD_RDX_RAX ".byte 0x0f, 0x78, 0xd0" +#define ASM_VMX_VMWRITE_RAX_RDX ".byte 0x0f, 0x79, 0xd0" +#define ASM_VMX_VMWRITE_RSP_RDX ".byte 0x0f, 0x79, 0xd4" +#define ASM_VMX_VMXOFF ".byte 0x0f, 0x01, 0xc4" +#define ASM_VMX_VMXON_RAX ".byte 0xf3, 0x0f, 0xc7, 0x30" + +#define MSR_IA32_TIME_STAMP_COUNTER 0x010 + +#define TSS_IOPB_BASE_OFFSET 0x66 +#define TSS_BASE_SIZE 0x68 +#define TSS_IOPB_SIZE (65536 / 8) +#define TSS_REDIRECTION_SIZE (256 / 8) +#define RMODE_TSS_SIZE (TSS_BASE_SIZE + TSS_REDIRECTION_SIZE + TSS_IOPB_SIZE + 1) + +#endif diff --git a/include/asm-x86/kvm_para.h b/include/asm-x86/kvm_para.h new file mode 100644 index 0000000..c6f3fd8 --- /dev/null +++ b/include/asm-x86/kvm_para.h @@ -0,0 +1,105 @@ +#ifndef __X86_KVM_PARA_H +#define __X86_KVM_PARA_H + +/* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx. It + * should be used to determine that a VM is running under KVM. + */ +#define KVM_CPUID_SIGNATURE 0x40000000 + +/* This CPUID returns a feature bitmap in eax. Before enabling a particular + * paravirtualization, the appropriate feature bit should be checked. + */ +#define KVM_CPUID_FEATURES 0x40000001 + +#ifdef __KERNEL__ +#include <asm/processor.h> + +/* This instruction is vmcall. On non-VT architectures, it will generate a + * trap that we will then rewrite to the appropriate instruction. + */ +#define KVM_HYPERCALL ".byte 0x0f,0x01,0xc1" + +/* For KVM hypercalls, a three-byte sequence of either the vmrun or the vmmrun + * instruction. The hypervisor may replace it with something else but only the + * instructions are guaranteed to be supported. + * + * Up to four arguments may be passed in rbx, rcx, rdx, and rsi respectively. + * The hypercall number should be placed in rax and the return value will be + * placed in rax. No other registers will be clobbered unless explicited + * noted by the particular hypercall. + */ + +static inline long kvm_hypercall0(unsigned int nr) +{ + long ret; + asm volatile(KVM_HYPERCALL + : "=a"(ret) + : "a"(nr)); + return ret; +} + +static inline long kvm_hypercall1(unsigned int nr, unsigned long p1) +{ + long ret; + asm volatile(KVM_HYPERCALL + : "=a"(ret) + : "a"(nr), "b"(p1)); + return ret; +} + +static inline long kvm_hypercall2(unsigned int nr, unsigned long p1, + unsigned long p2) +{ + long ret; + asm volatile(KVM_HYPERCALL + : "=a"(ret) + : "a"(nr), "b"(p1), "c"(p2)); + return ret; +} + +static inline long kvm_hypercall3(unsigned int nr, unsigned long p1, + unsigned long p2, unsigned long p3) +{ + long ret; + asm volatile(KVM_HYPERCALL + : "=a"(ret) + : "a"(nr), "b"(p1), "c"(p2), "d"(p3)); + return ret; +} + +static inline long kvm_hypercall4(unsigned int nr, unsigned long p1, + unsigned long p2, unsigned long p3, + unsigned long p4) +{ + long ret; + asm volatile(KVM_HYPERCALL + : "=a"(ret) + : "a"(nr), "b"(p1), "c"(p2), "d"(p3), "S"(p4)); + return ret; +} + +static inline int kvm_para_available(void) +{ + unsigned int eax, ebx, ecx, edx; + char signature[13]; + + cpuid(KVM_CPUID_SIGNATURE, &eax, &ebx, &ecx, &edx); + memcpy(signature + 0, &ebx, 4); + memcpy(signature + 4, &ecx, 4); + memcpy(signature + 8, &edx, 4); + signature[12] = 0; + + if (strcmp(signature, "KVMKVMKVM") == 0) + return 1; + + return 0; +} + +static inline unsigned int kvm_arch_para_features(void) +{ + return cpuid_eax(KVM_CPUID_FEATURES); +} + +#endif + +#endif diff --git a/include/asm-x86/kvm_x86_emulate.h b/include/asm-x86/kvm_x86_emulate.h new file mode 100644 index 0000000..7db91b9 --- /dev/null +++ b/include/asm-x86/kvm_x86_emulate.h @@ -0,0 +1,186 @@ +/****************************************************************************** + * x86_emulate.h + * + * Generic x86 (32-bit and 64-bit) instruction decoder and emulator. + * + * Copyright (c) 2005 Keir Fraser + * + * From: xen-unstable 10676:af9809f51f81a3c43f276f00c81a52ef558afda4 + */ + +#ifndef __X86_EMULATE_H__ +#define __X86_EMULATE_H__ + +struct x86_emulate_ctxt; + +/* + * x86_emulate_ops: + * + * These operations represent the instruction emulator's interface to memory. + * There are two categories of operation: those that act on ordinary memory + * regions (*_std), and those that act on memory regions known to require + * special treatment or emulation (*_emulated). + * + * The emulator assumes that an instruction accesses only one 'emulated memory' + * location, that this location is the given linear faulting address (cr2), and + * that this is one of the instruction's data operands. Instruction fetches and + * stack operations are assumed never to access emulated memory. The emulator + * automatically deduces which operand of a string-move operation is accessing + * emulated memory, and assumes that the other operand accesses normal memory. + * + * NOTES: + * 1. The emulator isn't very smart about emulated vs. standard memory. + * 'Emulated memory' access addresses should be checked for sanity. + * 'Normal memory' accesses may fault, and the caller must arrange to + * detect and handle reentrancy into the emulator via recursive faults. + * Accesses may be unaligned and may cross page boundaries. + * 2. If the access fails (cannot emulate, or a standard access faults) then + * it is up to the memop to propagate the fault to the guest VM via + * some out-of-band mechanism, unknown to the emulator. The memop signals + * failure by returning X86EMUL_PROPAGATE_FAULT to the emulator, which will + * then immediately bail. + * 3. Valid access sizes are 1, 2, 4 and 8 bytes. On x86/32 systems only + * cmpxchg8b_emulated need support 8-byte accesses. + * 4. The emulator cannot handle 64-bit mode emulation on an x86/32 system. + */ +/* Access completed successfully: continue emulation as normal. */ +#define X86EMUL_CONTINUE 0 +/* Access is unhandleable: bail from emulation and return error to caller. */ +#define X86EMUL_UNHANDLEABLE 1 +/* Terminate emulation but return success to the caller. */ +#define X86EMUL_PROPAGATE_FAULT 2 /* propagate a generated fault to guest */ +#define X86EMUL_RETRY_INSTR 2 /* retry the instruction for some reason */ +#define X86EMUL_CMPXCHG_FAILED 2 /* cmpxchg did not see expected value */ +struct x86_emulate_ops { + /* + * read_std: Read bytes of standard (non-emulated/special) memory. + * Used for instruction fetch, stack operations, and others. + * @addr: [IN ] Linear address from which to read. + * @val: [OUT] Value read from memory, zero-extended to 'u_long'. + * @bytes: [IN ] Number of bytes to read from memory. + */ + int (*read_std)(unsigned long addr, void *val, + unsigned int bytes, struct kvm_vcpu *vcpu); + + /* + * read_emulated: Read bytes from emulated/special memory area. + * @addr: [IN ] Linear address from which to read. + * @val: [OUT] Value read from memory, zero-extended to 'u_long'. + * @bytes: [IN ] Number of bytes to read from memory. + */ + int (*read_emulated) (unsigned long addr, + void *val, + unsigned int bytes, + struct kvm_vcpu *vcpu); + + /* + * write_emulated: Read bytes from emulated/special memory area. + * @addr: [IN ] Linear address to which to write. + * @val: [IN ] Value to write to memory (low-order bytes used as + * required). + * @bytes: [IN ] Number of bytes to write to memory. + */ + int (*write_emulated) (unsigned long addr, + const void *val, + unsigned int bytes, + struct kvm_vcpu *vcpu); + + /* + * cmpxchg_emulated: Emulate an atomic (LOCKed) CMPXCHG operation on an + * emulated/special memory area. + * @addr: [IN ] Linear address to access. + * @old: [IN ] Value expected to be current at @addr. + * @new: [IN ] Value to write to @addr. + * @bytes: [IN ] Number of bytes to access using CMPXCHG. + */ + int (*cmpxchg_emulated) (unsigned long addr, + const void *old, + const void *new, + unsigned int bytes, + struct kvm_vcpu *vcpu); + +}; + +/* Type, address-of, and value of an instruction's operand. */ +struct operand { + enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type; + unsigned int bytes; + unsigned long val, orig_val, *ptr; +}; + +struct fetch_cache { + u8 data[15]; + unsigned long start; + unsigned long end; +}; + +struct decode_cache { + u8 twobyte; + u8 b; + u8 lock_prefix; + u8 rep_prefix; + u8 op_bytes; + u8 ad_bytes; + u8 rex_prefix; + struct operand src; + struct operand dst; + unsigned long *override_base; + unsigned int d; + unsigned long regs[NR_VCPU_REGS]; + unsigned long eip; + /* modrm */ + u8 modrm; + u8 modrm_mod; + u8 modrm_reg; + u8 modrm_rm; + u8 use_modrm_ea; + unsigned long modrm_ea; + unsigned long modrm_val; + struct fetch_cache fetch; +}; + +struct x86_emulate_ctxt { + /* Register state before/after emulation. */ + struct kvm_vcpu *vcpu; + + /* Linear faulting address (if emulating a page-faulting instruction). */ + unsigned long eflags; + + /* Emulated execution mode, represented by an X86EMUL_MODE value. */ + int mode; + + unsigned long cs_base; + unsigned long ds_base; + unsigned long es_base; + unsigned long ss_base; + unsigned long gs_base; + unsigned long fs_base; + + /* decode cache */ + + struct decode_cache decode; +}; + +/* Repeat String Operation Prefix */ +#define REPE_PREFIX 1 +#define REPNE_PREFIX 2 + +/* Execution mode, passed to the emulator. */ +#define X86EMUL_MODE_REAL 0 /* Real mode. */ +#define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */ +#define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */ +#define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */ + +/* Host execution mode. */ +#if defined(__i386__) +#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT32 +#elif defined(CONFIG_X86_64) +#define X86EMUL_MODE_HOST X86EMUL_MODE_PROT64 +#endif + +int x86_decode_insn(struct x86_emulate_ctxt *ctxt, + struct x86_emulate_ops *ops); +int x86_emulate_insn(struct x86_emulate_ctxt *ctxt, + struct x86_emulate_ops *ops); + +#endif /* __X86_EMULATE_H__ */ diff --git a/include/linux/Kbuild b/include/linux/Kbuild index 27b9350..85b2482 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -100,7 +100,6 @@ header-y += iso_fs.h header-y += ixjuser.h header-y += jffs2.h header-y += keyctl.h -header-y += kvm.h header-y += limits.h header-y += lock_dlm_plock.h header-y += magic.h @@ -256,6 +255,7 @@ unifdef-y += kd.h unifdef-y += kernelcapi.h unifdef-y += kernel.h unifdef-y += keyboard.h +unifdef-$(CONFIG_HAVE_KVM) += kvm.h unifdef-y += llc.h unifdef-y += loop.h unifdef-y += lp.h diff --git a/include/linux/kvm.h b/include/linux/kvm.h index 057a7f3..4de4fd2 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -9,12 +9,10 @@ #include <asm/types.h> #include <linux/ioctl.h> +#include <asm/kvm.h> #define KVM_API_VERSION 12 -/* Architectural interrupt line count. */ -#define KVM_NR_INTERRUPTS 256 - /* for KVM_CREATE_MEMORY_REGION */ struct kvm_memory_region { __u32 slot; @@ -23,17 +21,19 @@ struct kvm_memory_region { __u64 memory_size; /* bytes */ }; -/* for kvm_memory_region::flags */ -#define KVM_MEM_LOG_DIRTY_PAGES 1UL - -struct kvm_memory_alias { - __u32 slot; /* this has a different namespace than memory slots */ +/* for KVM_SET_USER_MEMORY_REGION */ +struct kvm_userspace_memory_region { + __u32 slot; __u32 flags; __u64 guest_phys_addr; - __u64 memory_size; - __u64 target_phys_addr; + __u64 memory_size; /* bytes */ + __u64 userspace_addr; /* start of the userspace allocated memory */ }; +/* for kvm_memory_region::flags */ +#define KVM_MEM_LOG_DIRTY_PAGES 1UL + + /* for KVM_IRQ_LINE */ struct kvm_irq_level { /* @@ -45,62 +45,18 @@ struct kvm_irq_level { __u32 level; }; -/* for KVM_GET_IRQCHIP and KVM_SET_IRQCHIP */ -struct kvm_pic_state { - __u8 last_irr; /* edge detection */ - __u8 irr; /* interrupt request register */ - __u8 imr; /* interrupt mask register */ - __u8 isr; /* interrupt service register */ - __u8 priority_add; /* highest irq priority */ - __u8 irq_base; - __u8 read_reg_select; - __u8 poll; - __u8 special_mask; - __u8 init_state; - __u8 auto_eoi; - __u8 rotate_on_auto_eoi; - __u8 special_fully_nested_mode; - __u8 init4; /* true if 4 byte init */ - __u8 elcr; /* PIIX edge/trigger selection */ - __u8 elcr_mask; -}; - -#define KVM_IOAPIC_NUM_PINS 24 -struct kvm_ioapic_state { - __u64 base_address; - __u32 ioregsel; - __u32 id; - __u32 irr; - __u32 pad; - union { - __u64 bits; - struct { - __u8 vector; - __u8 delivery_mode:3; - __u8 dest_mode:1; - __u8 delivery_status:1; - __u8 polarity:1; - __u8 remote_irr:1; - __u8 trig_mode:1; - __u8 mask:1; - __u8 reserve:7; - __u8 reserved[4]; - __u8 dest_id; - } fields; - } redirtbl[KVM_IOAPIC_NUM_PINS]; -}; - -#define KVM_IRQCHIP_PIC_MASTER 0 -#define KVM_IRQCHIP_PIC_SLAVE 1 -#define KVM_IRQCHIP_IOAPIC 2 struct kvm_irqchip { __u32 chip_id; __u32 pad; union { char dummy[512]; /* reserving space */ +#ifdef CONFIG_X86 struct kvm_pic_state pic; +#endif +#if defined(CONFIG_X86) || defined(CONFIG_IA64) struct kvm_ioapic_state ioapic; +#endif } chip; }; @@ -116,6 +72,7 @@ struct kvm_irqchip { #define KVM_EXIT_FAIL_ENTRY 9 #define KVM_EXIT_INTR 10 #define KVM_EXIT_SET_TPR 11 +#define KVM_EXIT_TPR_ACCESS 12 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */ struct kvm_run { @@ -174,90 +131,17 @@ struct kvm_run { __u32 longmode; __u32 pad; } hypercall; + /* KVM_EXIT_TPR_ACCESS */ + struct { + __u64 rip; + __u32 is_write; + __u32 pad; + } tpr_access; /* Fix the size of the union. */ char padding[256]; }; }; -/* for KVM_GET_REGS and KVM_SET_REGS */ -struct kvm_regs { - /* out (KVM_GET_REGS) / in (KVM_SET_REGS) */ - __u64 rax, rbx, rcx, rdx; - __u64 rsi, rdi, rsp, rbp; - __u64 r8, r9, r10, r11; - __u64 r12, r13, r14, r15; - __u64 rip, rflags; -}; - -/* for KVM_GET_FPU and KVM_SET_FPU */ -struct kvm_fpu { - __u8 fpr[8][16]; - __u16 fcw; - __u16 fsw; - __u8 ftwx; /* in fxsave format */ - __u8 pad1; - __u16 last_opcode; - __u64 last_ip; - __u64 last_dp; - __u8 xmm[16][16]; - __u32 mxcsr; - __u32 pad2; -}; - -/* for KVM_GET_LAPIC and KVM_SET_LAPIC */ -#define KVM_APIC_REG_SIZE 0x400 -struct kvm_lapic_state { - char regs[KVM_APIC_REG_SIZE]; -}; - -struct kvm_segment { - __u64 base; - __u32 limit; - __u16 selector; - __u8 type; - __u8 present, dpl, db, s, l, g, avl; - __u8 unusable; - __u8 padding; -}; - -struct kvm_dtable { - __u64 base; - __u16 limit; - __u16 padding[3]; -}; - -/* for KVM_GET_SREGS and KVM_SET_SREGS */ -struct kvm_sregs { - /* out (KVM_GET_SREGS) / in (KVM_SET_SREGS) */ - struct kvm_segment cs, ds, es, fs, gs, ss; - struct kvm_segment tr, ldt; - struct kvm_dtable gdt, idt; - __u64 cr0, cr2, cr3, cr4, cr8; - __u64 efer; - __u64 apic_base; - __u64 interrupt_bitmap[(KVM_NR_INTERRUPTS + 63) / 64]; -}; - -struct kvm_msr_entry { - __u32 index; - __u32 reserved; - __u64 data; -}; - -/* for KVM_GET_MSRS and KVM_SET_MSRS */ -struct kvm_msrs { - __u32 nmsrs; /* number of msrs in entries */ - __u32 pad; - - struct kvm_msr_entry entries[0]; -}; - -/* for KVM_GET_MSR_INDEX_LIST */ -struct kvm_msr_list { - __u32 nmsrs; /* number of msrs in entries */ - __u32 indices[0]; -}; - /* for KVM_TRANSLATE */ struct kvm_translation { /* in */ @@ -302,28 +186,24 @@ struct kvm_dirty_log { }; }; -struct kvm_cpuid_entry { - __u32 function; - __u32 eax; - __u32 ebx; - __u32 ecx; - __u32 edx; - __u32 padding; -}; - -/* for KVM_SET_CPUID */ -struct kvm_cpuid { - __u32 nent; - __u32 padding; - struct kvm_cpuid_entry entries[0]; -}; - /* for KVM_SET_SIGNAL_MASK */ struct kvm_signal_mask { __u32 len; __u8 sigset[0]; }; +/* for KVM_TPR_ACCESS_REPORTING */ +struct kvm_tpr_access_ctl { + __u32 enabled; + __u32 flags; + __u32 reserved[8]; +}; + +/* for KVM_SET_VAPIC_ADDR */ +struct kvm_vapic_addr { + __u64 vapic_addr; +}; + #define KVMIO 0xAE /* @@ -347,11 +227,21 @@ struct kvm_signal_mask { */ #define KVM_CAP_IRQCHIP 0 #define KVM_CAP_HLT 1 +#define KVM_CAP_MMU_SHADOW_CACHE_CONTROL 2 +#define KVM_CAP_USER_MEMORY 3 +#define KVM_CAP_SET_TSS_ADDR 4 +#define KVM_CAP_EXT_CPUID 5 +#define KVM_CAP_VAPIC 6 /* * ioctls for VM fds */ #define KVM_SET_MEMORY_REGION _IOW(KVMIO, 0x40, struct kvm_memory_region) +#define KVM_SET_NR_MMU_PAGES _IO(KVMIO, 0x44) +#define KVM_GET_NR_MMU_PAGES _IO(KVMIO, 0x45) +#define KVM_SET_USER_MEMORY_REGION _IOW(KVMIO, 0x46,\ + struct kvm_userspace_memory_region) +#define KVM_SET_TSS_ADDR _IO(KVMIO, 0x47) /* * KVM_CREATE_VCPU receives as a parameter the vcpu slot, and returns * a vcpu fd. @@ -359,6 +249,7 @@ struct kvm_signal_mask { #define KVM_CREATE_VCPU _IO(KVMIO, 0x41) #define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log) #define KVM_SET_MEMORY_ALIAS _IOW(KVMIO, 0x43, struct kvm_memory_alias) +#define KVM_GET_SUPPORTED_CPUID _IOWR(KVMIO, 0x48, struct kvm_cpuid2) /* Device model IOC */ #define KVM_CREATE_IRQCHIP _IO(KVMIO, 0x60) #define KVM_IRQ_LINE _IOW(KVMIO, 0x61, struct kvm_irq_level) @@ -384,5 +275,11 @@ struct kvm_signal_mask { #define KVM_SET_FPU _IOW(KVMIO, 0x8d, struct kvm_fpu) #define KVM_GET_LAPIC _IOR(KVMIO, 0x8e, struct kvm_lapic_state) #define KVM_SET_LAPIC _IOW(KVMIO, 0x8f, struct kvm_lapic_state) +#define KVM_SET_CPUID2 _IOW(KVMIO, 0x90, struct kvm_cpuid2) +#define KVM_GET_CPUID2 _IOWR(KVMIO, 0x91, struct kvm_cpuid2) +/* Available with KVM_CAP_VAPIC */ +#define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl) +/* Available with KVM_CAP_VAPIC */ +#define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr) #endif diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h new file mode 100644 index 0000000..ea4764b --- /dev/null +++ b/include/linux/kvm_host.h @@ -0,0 +1,299 @@ +#ifndef __KVM_HOST_H +#define __KVM_HOST_H + +/* + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + */ + +#include <linux/types.h> +#include <linux/hardirq.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/spinlock.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/preempt.h> +#include <asm/signal.h> + +#include <linux/kvm.h> +#include <linux/kvm_para.h> + +#include <linux/kvm_types.h> + +#include <asm/kvm_host.h> + +#define KVM_MAX_VCPUS 4 +#define KVM_MEMORY_SLOTS 8 +/* memory slots that does not exposed to userspace */ +#define KVM_PRIVATE_MEM_SLOTS 4 + +#define KVM_PIO_PAGE_OFFSET 1 + +/* + * vcpu->requests bit members + */ +#define KVM_REQ_TLB_FLUSH 0 +#define KVM_REQ_MIGRATE_TIMER 1 +#define KVM_REQ_REPORT_TPR_ACCESS 2 + +struct kvm_vcpu; +extern struct kmem_cache *kvm_vcpu_cache; + +struct kvm_guest_debug { + int enabled; + unsigned long bp[4]; + int singlestep; +}; + +/* + * It would be nice to use something smarter than a linear search, TBD... + * Thankfully we dont expect many devices to register (famous last words :), + * so until then it will suffice. At least its abstracted so we can change + * in one place. + */ +struct kvm_io_bus { + int dev_count; +#define NR_IOBUS_DEVS 6 + struct kvm_io_device *devs[NR_IOBUS_DEVS]; +}; + +void kvm_io_bus_init(struct kvm_io_bus *bus); +void kvm_io_bus_destroy(struct kvm_io_bus *bus); +struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr); +void kvm_io_bus_register_dev(struct kvm_io_bus *bus, + struct kvm_io_device *dev); + +struct kvm_vcpu { + struct kvm *kvm; + struct preempt_notifier preempt_notifier; + int vcpu_id; + struct mutex mutex; + int cpu; + struct kvm_run *run; + int guest_mode; + unsigned long requests; + struct kvm_guest_debug guest_debug; + int fpu_active; + int guest_fpu_loaded; + wait_queue_head_t wq; + int sigset_active; + sigset_t sigset; + struct kvm_vcpu_stat stat; + +#ifdef CONFIG_HAS_IOMEM + int mmio_needed; + int mmio_read_completed; + int mmio_is_write; + int mmio_size; + unsigned char mmio_data[8]; + gpa_t mmio_phys_addr; +#endif + + struct kvm_vcpu_arch arch; +}; + +struct kvm_memory_slot { + gfn_t base_gfn; + unsigned long npages; + unsigned long flags; + unsigned long *rmap; + unsigned long *dirty_bitmap; + unsigned long userspace_addr; + int user_alloc; +}; + +struct kvm { + struct mutex lock; /* protects the vcpus array and APIC accesses */ + spinlock_t mmu_lock; + struct mm_struct *mm; /* userspace tied to this vm */ + int nmemslots; + struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + + KVM_PRIVATE_MEM_SLOTS]; + struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; + struct list_head vm_list; + struct file *filp; + struct kvm_io_bus mmio_bus; + struct kvm_io_bus pio_bus; + struct kvm_vm_stat stat; + struct kvm_arch arch; +}; + +/* The guest did something we don't support. */ +#define pr_unimpl(vcpu, fmt, ...) \ + do { \ + if (printk_ratelimit()) \ + printk(KERN_ERR "kvm: %i: cpu%i " fmt, \ + current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__); \ + } while (0) + +#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt) +#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt) + +int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id); +void kvm_vcpu_uninit(struct kvm_vcpu *vcpu); + +void vcpu_load(struct kvm_vcpu *vcpu); +void vcpu_put(struct kvm_vcpu *vcpu); + +void decache_vcpus_on_cpu(int cpu); + + +int kvm_init(void *opaque, unsigned int vcpu_size, + struct module *module); +void kvm_exit(void); + +#define HPA_MSB ((sizeof(hpa_t) * 8) - 1) +#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB) +static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; } +struct page *gva_to_page(struct kvm_vcpu *vcpu, gva_t gva); + +extern struct page *bad_page; + +int is_error_page(struct page *page); +int kvm_is_error_hva(unsigned long addr); +int kvm_set_memory_region(struct kvm *kvm, + struct kvm_userspace_memory_region *mem, + int user_alloc); +int __kvm_set_memory_region(struct kvm *kvm, + struct kvm_userspace_memory_region *mem, + int user_alloc); +int kvm_arch_set_memory_region(struct kvm *kvm, + struct kvm_userspace_memory_region *mem, + struct kvm_memory_slot old, + int user_alloc); +gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn); +struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); +void kvm_release_page_clean(struct page *page); +void kvm_release_page_dirty(struct page *page); +int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, + int len); +int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, + unsigned long len); +int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len); +int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, + int offset, int len); +int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, + unsigned long len); +int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); +int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); +struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); +int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn); +void mark_page_dirty(struct kvm *kvm, gfn_t gfn); + +void kvm_vcpu_block(struct kvm_vcpu *vcpu); +void kvm_resched(struct kvm_vcpu *vcpu); +void kvm_load_guest_fpu(struct kvm_vcpu *vcpu); +void kvm_put_guest_fpu(struct kvm_vcpu *vcpu); +void kvm_flush_remote_tlbs(struct kvm *kvm); + +long kvm_arch_dev_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg); +long kvm_arch_vcpu_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg); +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); + +int kvm_dev_ioctl_check_extension(long ext); + +int kvm_get_dirty_log(struct kvm *kvm, + struct kvm_dirty_log *log, int *is_dirty); +int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, + struct kvm_dirty_log *log); + +int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, + struct + kvm_userspace_memory_region *mem, + int user_alloc); +long kvm_arch_vm_ioctl(struct file *filp, + unsigned int ioctl, unsigned long arg); +void kvm_arch_destroy_vm(struct kvm *kvm); + +int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); +int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu); + +int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, + struct kvm_translation *tr); + +int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); +int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs); +int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, + struct kvm_sregs *sregs); +int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, + struct kvm_sregs *sregs); +int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, + struct kvm_debug_guest *dbg); +int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run); + +int kvm_arch_init(void *opaque); +void kvm_arch_exit(void); + +int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu); +void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu); + +void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu); +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu); +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu); +struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id); +int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu); +void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu); + +int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu); +void kvm_arch_hardware_enable(void *garbage); +void kvm_arch_hardware_disable(void *garbage); +int kvm_arch_hardware_setup(void); +void kvm_arch_hardware_unsetup(void); +void kvm_arch_check_processor_compat(void *rtn); +int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu); + +void kvm_free_physmem(struct kvm *kvm); + +struct kvm *kvm_arch_create_vm(void); +void kvm_arch_destroy_vm(struct kvm *kvm); + +int kvm_cpu_get_interrupt(struct kvm_vcpu *v); +int kvm_cpu_has_interrupt(struct kvm_vcpu *v); +void kvm_vcpu_kick(struct kvm_vcpu *vcpu); + +static inline void kvm_guest_enter(void) +{ + account_system_vtime(current); + current->flags |= PF_VCPU; +} + +static inline void kvm_guest_exit(void) +{ + account_system_vtime(current); + current->flags &= ~PF_VCPU; +} + +static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) +{ + return slot - kvm->memslots; +} + +static inline gpa_t gfn_to_gpa(gfn_t gfn) +{ + return (gpa_t)gfn << PAGE_SHIFT; +} + +static inline void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu) +{ + set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests); +} + +enum kvm_stat_kind { + KVM_STAT_VM, + KVM_STAT_VCPU, +}; + +struct kvm_stats_debugfs_item { + const char *name; + int offset; + enum kvm_stat_kind kind; + struct dentry *dentry; +}; +extern struct kvm_stats_debugfs_item debugfs_entries[]; + +#endif diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h index 3b29256..5497aac 100644 --- a/include/linux/kvm_para.h +++ b/include/linux/kvm_para.h @@ -2,72 +2,30 @@ #define __LINUX_KVM_PARA_H /* - * Guest OS interface for KVM paravirtualization - * - * Note: this interface is totally experimental, and is certain to change - * as we make progress. + * This header file provides a method for making a hypercall to the host + * Architectures should define: + * - kvm_hypercall0, kvm_hypercall1... + * - kvm_arch_para_features + * - kvm_para_available */ -/* - * Per-VCPU descriptor area shared between guest and host. Writable to - * both guest and host. Registered with the host by the guest when - * a guest acknowledges paravirtual mode. - * - * NOTE: all addresses are guest-physical addresses (gpa), to make it - * easier for the hypervisor to map between the various addresses. - */ -struct kvm_vcpu_para_state { - /* - * API version information for compatibility. If there's any support - * mismatch (too old host trying to execute too new guest) then - * the host will deny entry into paravirtual mode. Any other - * combination (new host + old guest and new host + new guest) - * is supposed to work - new host versions will support all old - * guest API versions. - */ - u32 guest_version; - u32 host_version; - u32 size; - u32 ret; - - /* - * The address of the vm exit instruction (VMCALL or VMMCALL), - * which the host will patch according to the CPU model the - * VM runs on: - */ - u64 hypercall_gpa; - -} __attribute__ ((aligned(PAGE_SIZE))); - -#define KVM_PARA_API_VERSION 1 - -/* - * This is used for an RDMSR's ECX parameter to probe for a KVM host. - * Hopefully no CPU vendor will use up this number. This is placed well - * out of way of the typical space occupied by CPU vendors' MSR indices, - * and we think (or at least hope) it wont be occupied in the future - * either. - */ -#define MSR_KVM_API_MAGIC 0x87655678 +/* Return values for hypercalls */ +#define KVM_ENOSYS 1000 -#define KVM_EINVAL 1 +#define KVM_HC_VAPIC_POLL_IRQ 1 /* - * Hypercall calling convention: - * - * Each hypercall may have 0-6 parameters. - * - * 64-bit hypercall index is in RAX, goes from 0 to __NR_hypercalls-1 - * - * 64-bit parameters 1-6 are in the standard gcc x86_64 calling convention - * order: RDI, RSI, RDX, RCX, R8, R9. - * - * 32-bit index is EBX, parameters are: EAX, ECX, EDX, ESI, EDI, EBP. - * (the first 3 are according to the gcc regparm calling convention) - * - * No registers are clobbered by the hypercall, except that the - * return value is in RAX. + * hypercalls use architecture specific */ -#define __NR_hypercalls 0 +#include <asm/kvm_para.h> + +#ifdef __KERNEL__ +static inline int kvm_para_has_feature(unsigned int feature) +{ + if (kvm_arch_para_features() & (1UL << feature)) + return 1; + return 0; +} +#endif /* __KERNEL__ */ +#endif /* __LINUX_KVM_PARA_H */ -#endif diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h new file mode 100644 index 0000000..1c4e46d --- /dev/null +++ b/include/linux/kvm_types.h @@ -0,0 +1,54 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef __KVM_TYPES_H__ +#define __KVM_TYPES_H__ + +#include <asm/types.h> + +/* + * Address types: + * + * gva - guest virtual address + * gpa - guest physical address + * gfn - guest frame number + * hva - host virtual address + * hpa - host physical address + * hfn - host frame number + */ + +typedef unsigned long gva_t; +typedef u64 gpa_t; +typedef unsigned long gfn_t; + +typedef unsigned long hva_t; +typedef u64 hpa_t; +typedef unsigned long hfn_t; + +struct kvm_pio_request { + unsigned long count; + int cur_count; + struct page *guest_pages[2]; + unsigned guest_page_offset; + int in; + int port; + int size; + int string; + int down; + int rep; +}; + +#endif /* __KVM_TYPES_H__ */ |