arch/x86/kvm/x86.h

   1 #ifndef ARCH_X86_KVM_X86_H
   2 #define ARCH_X86_KVM_X86_H
   3
   4 #include <linux/kvm_host.h>
   5 #include <asm/pvclock.h>
   6 #include "kvm_cache_regs.h"
   7
   8 #define MSR_IA32_CR_PAT_DEFAULT  0x0007040600070406ULL
   9
  10 static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu)
  11 {
  12         vcpu->arch.exception.pending = false;
  13 }
  14
  15 static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector,
  16         bool soft)
  17 {
  18         vcpu->arch.interrupt.pending = true;
  19         vcpu->arch.interrupt.soft = soft;
  20         vcpu->arch.interrupt.nr = vector;
  21 }
  22
  23 static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu)
  24 {
  25         vcpu->arch.interrupt.pending = false;
  26 }
  27
  28 static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu)
  29 {
  30         return vcpu->arch.exception.pending || vcpu->arch.interrupt.pending ||
  31                 vcpu->arch.nmi_injected;
  32 }
  33
  34 static inline bool kvm_exception_is_soft(unsigned int nr)
  35 {
  36         return (nr == BP_VECTOR) || (nr == OF_VECTOR);
  37 }
  38
  39 static inline bool is_protmode(struct kvm_vcpu *vcpu)
  40 {
  41         return kvm_read_cr0_bits(vcpu, X86_CR0_PE);
  42 }
  43
  44 static inline int is_long_mode(struct kvm_vcpu *vcpu)
  45 {
  46 #ifdef CONFIG_X86_64
  47         return vcpu->arch.efer & EFER_LMA;
  48 #else
  49         return 0;
  50 #endif
  51 }
  52
  53 static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu)
  54 {
  55         int cs_db, cs_l;
  56
  57         if (!is_long_mode(vcpu))
  58                 return false;
  59         kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
  60         return cs_l;
  61 }
  62
  63 static inline bool mmu_is_nested(struct kvm_vcpu *vcpu)
  64 {
  65         return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu;
  66 }
  67
  68 static inline int is_pae(struct kvm_vcpu *vcpu)
  69 {
  70         return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
  71 }
  72
  73 static inline int is_pse(struct kvm_vcpu *vcpu)
  74 {
  75         return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
  76 }
  77
  78 static inline int is_paging(struct kvm_vcpu *vcpu)
  79 {
  80         return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG));
  81 }
  82
  83 static inline u32 bit(int bitno)
  84 {
  85         return 1 << (bitno & 31);
  86 }
  87
  88 static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
  89                                         gva_t gva, gfn_t gfn, unsigned access)
  90 {
  91         vcpu->arch.mmio_gva = gva & PAGE_MASK;
  92         vcpu->arch.access = access;
  93         vcpu->arch.mmio_gfn = gfn;
  94         vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
  95 }
  96
  97 static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu)
  98 {
  99         return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation;
 100 }
 101
 102 /*
 103  * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we
 104  * clear all mmio cache info.
 105  */
 106 #define MMIO_GVA_ANY (~(gva_t)0)
 107
 108 static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva)
 109 {
 110         if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK))
 111                 return;
 112
 113         vcpu->arch.mmio_gva = 0;
 114 }
 115
 116 static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva)
 117 {
 118         if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva &&
 119               vcpu->arch.mmio_gva == (gva & PAGE_MASK))
 120                 return true;
 121
 122         return false;
 123 }
 124
 125 static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
 126 {
 127         if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn &&
 128               vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT)
 129                 return true;
 130
 131         return false;
 132 }
 133
 134 static inline unsigned long kvm_register_readl(struct kvm_vcpu *vcpu,
 135                                                enum kvm_reg reg)
 136 {
 137         unsigned long val = kvm_register_read(vcpu, reg);
 138
 139         return is_64_bit_mode(vcpu) ? val : (u32)val;
 140 }
 141
 142 static inline void kvm_register_writel(struct kvm_vcpu *vcpu,
 143                                        enum kvm_reg reg,
 144                                        unsigned long val)
 145 {
 146         if (!is_64_bit_mode(vcpu))
 147                 val = (u32)val;
 148         return kvm_register_write(vcpu, reg, val);
 149 }
 150
 151 static inline u64 get_kernel_ns(void)
 152 {
 153         return ktime_get_boot_ns();
 154 }
 155
 156 static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk)
 157 {
 158         return !(kvm->arch.disabled_quirks & quirk);
 159 }
 160
 161 void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
 162 void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
 163 void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
 164 int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip);
 165
 166 void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr);
 167
 168 int kvm_read_guest_virt(struct x86_emulate_ctxt *ctxt,
 169         gva_t addr, void *val, unsigned int bytes,
 170         struct x86_exception *exception);
 171
 172 int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt,
 173         gva_t addr, void *val, unsigned int bytes,
 174         struct x86_exception *exception);
 175
 176 void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu);
 177 u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn);
 178 bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 179 int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 180 int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
 181 bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn,
 182                                           int page_num);
 183 bool kvm_vector_hashing_enabled(void);
 184
 185 #define KVM_SUPPORTED_XCR0     (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
 186                                 | XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
 187                                 | XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \
 188                                 | XFEATURE_MASK_PKRU)
 189 extern u64 host_xcr0;
 190
 191 extern u64 kvm_supported_xcr0(void);
 192
 193 extern unsigned int min_timer_period_us;
 194
 195 extern unsigned int lapic_timer_advance_ns;
 196
 197 extern struct static_key kvm_no_apic_vcpu;
 198
 199 static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec)
 200 {
 201         return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult,
 202                                    vcpu->arch.virtual_tsc_shift);
 203 }
 204
 205 /* Same "calling convention" as do_div:
 206  * - divide (n << 32) by base
 207  * - put result in n
 208  * - return remainder
 209  */
 210 #define do_shl32_div32(n, base)                                 \
 211         ({                                                      \
 212             u32 __quot, __rem;                                  \
 213             asm("divl %2" : "=a" (__quot), "=d" (__rem)         \
 214                         : "rm" (base), "0" (0), "1" ((u32) n)); \
 215             n = __quot;                                         \
 216             __rem;                                              \
 217          })
 218
 219 #endif