arch/x86/kvm/x86.h - third_party/linux - Git at Google

 /* 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"

 #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 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 u32 bit(int bitno)
 {
 	return 1 << (bitno & 31);
 }

 static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
 {
 	return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48;
 }

 static inline u8 ctxt_virt_addr_bits(struct x86_emulate_ctxt *ctxt)
 {
 	return (ctxt->ops->get_cr(ctxt, 4) & 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)
 {
 #ifdef CONFIG_X86_64
 	return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la;
 #else
 	return false;
 #endif
 }

 static inline bool emul_is_noncanonical_address(u64 la,
 						struct x86_emulate_ctxt *ctxt)
 {
 #ifdef CONFIG_X86_64
 	return get_canonical(la, ctxt_virt_addr_bits(ctxt)) != la;
 #else
 	return false;
 #endif
 }

 static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
 					gva_t gva, gfn_t gfn, unsigned access)
 {
 	/*
 	 * 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.access = access;
 	vcpu->arch.mmio_gfn = gfn;
 	vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
 }

 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,
 					       enum kvm_reg 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,
 				       enum kvm_reg 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);
 }

 void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
 int 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_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);

 #define KVM_SUPPORTED_XCR0     (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \
 				| XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \
 				| XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \
 				| XFEATURE_MASK_PKRU)
 extern u64 host_xcr0;

 extern u64 kvm_supported_xcr0(void);

 extern unsigned int min_timer_period_us;

 extern unsigned int lapic_timer_advance_ns;

 extern bool enable_vmware_backdoor;

 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;
 }

 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);
 }

 #endif
	/* 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"

	#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 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 u32 bit(int bitno)
	{
	return 1 << (bitno & 31);
	}

	static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu)
	{
	return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48;
	}

	static inline u8 ctxt_virt_addr_bits(struct x86_emulate_ctxt *ctxt)
	{
	return (ctxt->ops->get_cr(ctxt, 4) & 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)
	{
	#ifdef CONFIG_X86_64
	return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la;
	#else
	return false;
	#endif
	}

	static inline bool emul_is_noncanonical_address(u64 la,
	struct x86_emulate_ctxt *ctxt)
	{
	#ifdef CONFIG_X86_64
	return get_canonical(la, ctxt_virt_addr_bits(ctxt)) != la;
	#else
	return false;
	#endif
	}

	static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu,
	gva_t gva, gfn_t gfn, unsigned access)
	{
	/*
	* 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.access = access;
	vcpu->arch.mmio_gfn = gfn;
	vcpu->arch.mmio_gen = kvm_memslots(vcpu->kvm)->generation;
	}

	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,
	enum kvm_reg 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,
	enum kvm_reg 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);
	}

	void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
	int 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_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);

	#define KVM_SUPPORTED_XCR0 (XFEATURE_MASK_FP \| XFEATURE_MASK_SSE \
	\| XFEATURE_MASK_YMM \| XFEATURE_MASK_BNDREGS \
	\| XFEATURE_MASK_BNDCSR \| XFEATURE_MASK_AVX512 \
	\| XFEATURE_MASK_PKRU)
	extern u64 host_xcr0;

	extern u64 kvm_supported_xcr0(void);

	extern unsigned int min_timer_period_us;

	extern unsigned int lapic_timer_advance_ns;

	extern bool enable_vmware_backdoor;

	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;
	}

	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);
	}

	#endif