| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef ARCH_X86_KVM_X86_H |
| #define ARCH_X86_KVM_X86_H |
| |
| #include <linux/kvm_host.h> |
| #include <asm/pvclock.h> |
| #include "kvm_cache_regs.h" |
| #include "kvm_emulate.h" |
| |
| #define KVM_DEFAULT_PLE_GAP 128 |
| #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 |
| #define KVM_DEFAULT_PLE_WINDOW_GROW 2 |
| #define KVM_DEFAULT_PLE_WINDOW_SHRINK 0 |
| #define KVM_VMX_DEFAULT_PLE_WINDOW_MAX UINT_MAX |
| #define KVM_SVM_DEFAULT_PLE_WINDOW_MAX USHRT_MAX |
| #define KVM_SVM_DEFAULT_PLE_WINDOW 3000 |
| |
| static inline unsigned int __grow_ple_window(unsigned int val, |
| unsigned int base, unsigned int modifier, unsigned int max) |
| { |
| u64 ret = val; |
| |
| if (modifier < 1) |
| return base; |
| |
| if (modifier < base) |
| ret *= modifier; |
| else |
| ret += modifier; |
| |
| return min(ret, (u64)max); |
| } |
| |
| static inline unsigned int __shrink_ple_window(unsigned int val, |
| unsigned int base, unsigned int modifier, unsigned int min) |
| { |
| if (modifier < 1) |
| return base; |
| |
| if (modifier < base) |
| val /= modifier; |
| else |
| val -= modifier; |
| |
| return max(val, min); |
| } |
| |
| #define MSR_IA32_CR_PAT_DEFAULT 0x0007040600070406ULL |
| |
| static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.exception.pending = false; |
| vcpu->arch.exception.injected = false; |
| } |
| |
| static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector, |
| bool soft) |
| { |
| vcpu->arch.interrupt.injected = true; |
| vcpu->arch.interrupt.soft = soft; |
| vcpu->arch.interrupt.nr = vector; |
| } |
| |
| static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu) |
| { |
| vcpu->arch.interrupt.injected = false; |
| } |
| |
| static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.exception.injected || vcpu->arch.interrupt.injected || |
| vcpu->arch.nmi_injected; |
| } |
| |
| static inline bool kvm_exception_is_soft(unsigned int nr) |
| { |
| return (nr == BP_VECTOR) || (nr == OF_VECTOR); |
| } |
| |
| static inline bool is_protmode(struct kvm_vcpu *vcpu) |
| { |
| return kvm_read_cr0_bits(vcpu, X86_CR0_PE); |
| } |
| |
| static inline int is_long_mode(struct kvm_vcpu *vcpu) |
| { |
| #ifdef CONFIG_X86_64 |
| return vcpu->arch.efer & EFER_LMA; |
| #else |
| return 0; |
| #endif |
| } |
| |
| static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu) |
| { |
| int cs_db, cs_l; |
| |
| if (!is_long_mode(vcpu)) |
| return false; |
| kvm_x86_ops.get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
| return cs_l; |
| } |
| |
| static inline bool is_la57_mode(struct kvm_vcpu *vcpu) |
| { |
| #ifdef CONFIG_X86_64 |
| return (vcpu->arch.efer & EFER_LMA) && |
| kvm_read_cr4_bits(vcpu, X86_CR4_LA57); |
| #else |
| return 0; |
| #endif |
| } |
| |
| static inline bool x86_exception_has_error_code(unsigned int vector) |
| { |
| static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) | |
| BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) | |
| BIT(PF_VECTOR) | BIT(AC_VECTOR); |
| |
| return (1U << vector) & exception_has_error_code; |
| } |
| |
| static inline bool mmu_is_nested(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu; |
| } |
| |
| static inline void kvm_vcpu_flush_tlb_current(struct kvm_vcpu *vcpu) |
| { |
| ++vcpu->stat.tlb_flush; |
| kvm_x86_ops.tlb_flush_current(vcpu); |
| } |
| |
| static inline int is_pae(struct kvm_vcpu *vcpu) |
| { |
| return kvm_read_cr4_bits(vcpu, X86_CR4_PAE); |
| } |
| |
| static inline int is_pse(struct kvm_vcpu *vcpu) |
| { |
| return kvm_read_cr4_bits(vcpu, X86_CR4_PSE); |
| } |
| |
| static inline int is_paging(struct kvm_vcpu *vcpu) |
| { |
| return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG)); |
| } |
| |
| static inline bool is_pae_paging(struct kvm_vcpu *vcpu) |
| { |
| return !is_long_mode(vcpu) && is_pae(vcpu) && is_paging(vcpu); |
| } |
| |
| static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu) |
| { |
| return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48; |
| } |
| |
| static inline u64 get_canonical(u64 la, u8 vaddr_bits) |
| { |
| return ((int64_t)la << (64 - vaddr_bits)) >> (64 - vaddr_bits); |
| } |
| |
| static inline bool is_noncanonical_address(u64 la, struct kvm_vcpu *vcpu) |
| { |
| return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la; |
| } |
| |
| static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu, |
| gva_t gva, gfn_t gfn, unsigned access) |
| { |
| u64 gen = kvm_memslots(vcpu->kvm)->generation; |
| |
| if (unlikely(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS)) |
| return; |
| |
| /* |
| * If this is a shadow nested page table, the "GVA" is |
| * actually a nGPA. |
| */ |
| vcpu->arch.mmio_gva = mmu_is_nested(vcpu) ? 0 : gva & PAGE_MASK; |
| vcpu->arch.mmio_access = access; |
| vcpu->arch.mmio_gfn = gfn; |
| vcpu->arch.mmio_gen = gen; |
| } |
| |
| static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu) |
| { |
| return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation; |
| } |
| |
| /* |
| * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we |
| * clear all mmio cache info. |
| */ |
| #define MMIO_GVA_ANY (~(gva_t)0) |
| |
| static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva) |
| { |
| if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK)) |
| return; |
| |
| vcpu->arch.mmio_gva = 0; |
| } |
| |
| static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva) |
| { |
| if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva && |
| vcpu->arch.mmio_gva == (gva & PAGE_MASK)) |
| return true; |
| |
| return false; |
| } |
| |
| static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa) |
| { |
| if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn && |
| vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT) |
| return true; |
| |
| return false; |
| } |
| |
| static inline unsigned long kvm_register_readl(struct kvm_vcpu *vcpu, int reg) |
| { |
| unsigned long val = kvm_register_read(vcpu, reg); |
| |
| return is_64_bit_mode(vcpu) ? val : (u32)val; |
| } |
| |
| static inline void kvm_register_writel(struct kvm_vcpu *vcpu, |
| int reg, unsigned long val) |
| { |
| if (!is_64_bit_mode(vcpu)) |
| val = (u32)val; |
| return kvm_register_write(vcpu, reg, val); |
| } |
| |
| static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk) |
| { |
| return !(kvm->arch.disabled_quirks & quirk); |
| } |
| |
| static inline bool kvm_vcpu_latch_init(struct kvm_vcpu *vcpu) |
| { |
| return is_smm(vcpu) || kvm_x86_ops.apic_init_signal_blocked(vcpu); |
| } |
| |
| void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip); |
| |
| void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr); |
| u64 get_kvmclock_ns(struct kvm *kvm); |
| |
| int kvm_read_guest_virt(struct kvm_vcpu *vcpu, |
| gva_t addr, void *val, unsigned int bytes, |
| struct x86_exception *exception); |
| |
| int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu, |
| gva_t addr, void *val, unsigned int bytes, |
| struct x86_exception *exception); |
| |
| int handle_ud(struct kvm_vcpu *vcpu); |
| |
| void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu); |
| |
| void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu); |
| u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); |
| bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); |
| int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); |
| int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); |
| bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, |
| int page_num); |
| bool kvm_vector_hashing_enabled(void); |
| void kvm_fixup_and_inject_pf_error(struct kvm_vcpu *vcpu, gva_t gva, u16 error_code); |
| int x86_emulate_instruction(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, |
| int emulation_type, void *insn, int insn_len); |
| fastpath_t handle_fastpath_set_msr_irqoff(struct kvm_vcpu *vcpu); |
| |
| extern u64 host_xcr0; |
| extern u64 supported_xcr0; |
| extern u64 supported_xss; |
| |
| static inline bool kvm_mpx_supported(void) |
| { |
| return (supported_xcr0 & (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR)) |
| == (XFEATURE_MASK_BNDREGS | XFEATURE_MASK_BNDCSR); |
| } |
| |
| extern unsigned int min_timer_period_us; |
| |
| extern bool enable_vmware_backdoor; |
| |
| extern int pi_inject_timer; |
| |
| extern struct static_key kvm_no_apic_vcpu; |
| |
| static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) |
| { |
| return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, |
| vcpu->arch.virtual_tsc_shift); |
| } |
| |
| /* Same "calling convention" as do_div: |
| * - divide (n << 32) by base |
| * - put result in n |
| * - return remainder |
| */ |
| #define do_shl32_div32(n, base) \ |
| ({ \ |
| u32 __quot, __rem; \ |
| asm("divl %2" : "=a" (__quot), "=d" (__rem) \ |
| : "rm" (base), "0" (0), "1" ((u32) n)); \ |
| n = __quot; \ |
| __rem; \ |
| }) |
| |
| static inline bool kvm_mwait_in_guest(struct kvm *kvm) |
| { |
| return kvm->arch.mwait_in_guest; |
| } |
| |
| static inline bool kvm_hlt_in_guest(struct kvm *kvm) |
| { |
| return kvm->arch.hlt_in_guest; |
| } |
| |
| static inline bool kvm_pause_in_guest(struct kvm *kvm) |
| { |
| return kvm->arch.pause_in_guest; |
| } |
| |
| static inline bool kvm_cstate_in_guest(struct kvm *kvm) |
| { |
| return kvm->arch.cstate_in_guest; |
| } |
| |
| DECLARE_PER_CPU(struct kvm_vcpu *, current_vcpu); |
| |
| static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu) |
| { |
| __this_cpu_write(current_vcpu, vcpu); |
| } |
| |
| static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu) |
| { |
| __this_cpu_write(current_vcpu, NULL); |
| } |
| |
| |
| static inline bool kvm_pat_valid(u64 data) |
| { |
| if (data & 0xF8F8F8F8F8F8F8F8ull) |
| return false; |
| /* 0, 1, 4, 5, 6, 7 are valid values. */ |
| return (data | ((data & 0x0202020202020202ull) << 1)) == data; |
| } |
| |
| static inline bool kvm_dr7_valid(u64 data) |
| { |
| /* Bits [63:32] are reserved */ |
| return !(data >> 32); |
| } |
| static inline bool kvm_dr6_valid(u64 data) |
| { |
| /* Bits [63:32] are reserved */ |
| return !(data >> 32); |
| } |
| |
| void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu); |
| void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu); |
| int kvm_spec_ctrl_test_value(u64 value); |
| int kvm_valid_cr4(struct kvm_vcpu *vcpu, unsigned long cr4); |
| bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu); |
| int kvm_handle_memory_failure(struct kvm_vcpu *vcpu, int r, |
| struct x86_exception *e); |
| int kvm_handle_invpcid(struct kvm_vcpu *vcpu, unsigned long type, gva_t gva); |
| bool kvm_msr_allowed(struct kvm_vcpu *vcpu, u32 index, u32 type); |
| |
| #define KVM_MSR_RET_INVALID 2 |
| |
| #define __cr4_reserved_bits(__cpu_has, __c) \ |
| ({ \ |
| u64 __reserved_bits = CR4_RESERVED_BITS; \ |
| \ |
| if (!__cpu_has(__c, X86_FEATURE_XSAVE)) \ |
| __reserved_bits |= X86_CR4_OSXSAVE; \ |
| if (!__cpu_has(__c, X86_FEATURE_SMEP)) \ |
| __reserved_bits |= X86_CR4_SMEP; \ |
| if (!__cpu_has(__c, X86_FEATURE_SMAP)) \ |
| __reserved_bits |= X86_CR4_SMAP; \ |
| if (!__cpu_has(__c, X86_FEATURE_FSGSBASE)) \ |
| __reserved_bits |= X86_CR4_FSGSBASE; \ |
| if (!__cpu_has(__c, X86_FEATURE_PKU)) \ |
| __reserved_bits |= X86_CR4_PKE; \ |
| if (!__cpu_has(__c, X86_FEATURE_LA57)) \ |
| __reserved_bits |= X86_CR4_LA57; \ |
| if (!__cpu_has(__c, X86_FEATURE_UMIP)) \ |
| __reserved_bits |= X86_CR4_UMIP; \ |
| if (!__cpu_has(__c, X86_FEATURE_VMX)) \ |
| __reserved_bits |= X86_CR4_VMXE; \ |
| __reserved_bits; \ |
| }) |
| |
| #endif |
