732 lines
20 KiB
C
732 lines
20 KiB
C
#/*
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* Kernel-based Virtual Machine driver for Linux
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*
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* This header defines architecture specific interfaces, x86 version
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#ifndef ASM_KVM_HOST_H
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#define ASM_KVM_HOST_H
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/kvm.h>
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#include <linux/kvm_para.h>
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#include <linux/kvm_types.h>
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#include <asm/pvclock-abi.h>
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#include <asm/desc.h>
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#define KVM_MAX_VCPUS 16
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#define KVM_MEMORY_SLOTS 32
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/* memory slots that does not exposed to userspace */
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#define KVM_PRIVATE_MEM_SLOTS 4
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#define KVM_PIO_PAGE_OFFSET 1
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#define KVM_COALESCED_MMIO_PAGE_OFFSET 2
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#define CR3_PAE_RESERVED_BITS ((X86_CR3_PWT | X86_CR3_PCD) - 1)
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#define CR3_NONPAE_RESERVED_BITS ((PAGE_SIZE-1) & ~(X86_CR3_PWT | X86_CR3_PCD))
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#define CR3_L_MODE_RESERVED_BITS (CR3_NONPAE_RESERVED_BITS | \
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0xFFFFFF0000000000ULL)
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#define KVM_GUEST_CR0_MASK \
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(X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE \
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| X86_CR0_NW | X86_CR0_CD)
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#define KVM_VM_CR0_ALWAYS_ON \
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(X86_CR0_PG | X86_CR0_PE | X86_CR0_WP | X86_CR0_NE | X86_CR0_TS \
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| X86_CR0_MP)
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#define KVM_GUEST_CR4_MASK \
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(X86_CR4_VME | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_PGE | X86_CR4_VMXE)
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#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
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#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
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#define INVALID_PAGE (~(hpa_t)0)
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#define UNMAPPED_GVA (~(gpa_t)0)
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/* shadow tables are PAE even on non-PAE hosts */
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#define KVM_HPAGE_SHIFT 21
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#define KVM_HPAGE_SIZE (1UL << KVM_HPAGE_SHIFT)
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#define KVM_HPAGE_MASK (~(KVM_HPAGE_SIZE - 1))
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#define KVM_PAGES_PER_HPAGE (KVM_HPAGE_SIZE / PAGE_SIZE)
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#define DE_VECTOR 0
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#define UD_VECTOR 6
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#define NM_VECTOR 7
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#define DF_VECTOR 8
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#define TS_VECTOR 10
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#define NP_VECTOR 11
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#define SS_VECTOR 12
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#define GP_VECTOR 13
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#define PF_VECTOR 14
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#define MC_VECTOR 18
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#define SELECTOR_TI_MASK (1 << 2)
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#define SELECTOR_RPL_MASK 0x03
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#define IOPL_SHIFT 12
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#define KVM_ALIAS_SLOTS 4
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#define KVM_PERMILLE_MMU_PAGES 20
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#define KVM_MIN_ALLOC_MMU_PAGES 64
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#define KVM_MMU_HASH_SHIFT 10
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#define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT)
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#define KVM_MIN_FREE_MMU_PAGES 5
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#define KVM_REFILL_PAGES 25
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#define KVM_MAX_CPUID_ENTRIES 40
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#define KVM_NR_VAR_MTRR 8
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extern spinlock_t kvm_lock;
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extern struct list_head vm_list;
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struct kvm_vcpu;
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struct kvm;
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enum {
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VCPU_REGS_RAX = 0,
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VCPU_REGS_RCX = 1,
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VCPU_REGS_RDX = 2,
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VCPU_REGS_RBX = 3,
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VCPU_REGS_RSP = 4,
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VCPU_REGS_RBP = 5,
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VCPU_REGS_RSI = 6,
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VCPU_REGS_RDI = 7,
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#ifdef CONFIG_X86_64
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VCPU_REGS_R8 = 8,
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VCPU_REGS_R9 = 9,
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VCPU_REGS_R10 = 10,
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VCPU_REGS_R11 = 11,
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VCPU_REGS_R12 = 12,
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VCPU_REGS_R13 = 13,
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VCPU_REGS_R14 = 14,
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VCPU_REGS_R15 = 15,
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#endif
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NR_VCPU_REGS
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};
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enum {
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VCPU_SREG_ES,
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VCPU_SREG_CS,
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VCPU_SREG_SS,
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VCPU_SREG_DS,
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VCPU_SREG_FS,
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VCPU_SREG_GS,
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VCPU_SREG_TR,
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VCPU_SREG_LDTR,
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};
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#include <asm/kvm_x86_emulate.h>
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#define KVM_NR_MEM_OBJS 40
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struct kvm_guest_debug {
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int enabled;
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unsigned long bp[4];
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int singlestep;
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};
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/*
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* We don't want allocation failures within the mmu code, so we preallocate
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* enough memory for a single page fault in a cache.
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*/
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struct kvm_mmu_memory_cache {
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int nobjs;
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void *objects[KVM_NR_MEM_OBJS];
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};
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#define NR_PTE_CHAIN_ENTRIES 5
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struct kvm_pte_chain {
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u64 *parent_ptes[NR_PTE_CHAIN_ENTRIES];
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struct hlist_node link;
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};
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/*
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* kvm_mmu_page_role, below, is defined as:
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*
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* bits 0:3 - total guest paging levels (2-4, or zero for real mode)
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* bits 4:7 - page table level for this shadow (1-4)
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* bits 8:9 - page table quadrant for 2-level guests
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* bit 16 - "metaphysical" - gfn is not a real page (huge page/real mode)
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* bits 17:19 - common access permissions for all ptes in this shadow page
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*/
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union kvm_mmu_page_role {
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unsigned word;
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struct {
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unsigned glevels:4;
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unsigned level:4;
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unsigned quadrant:2;
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unsigned pad_for_nice_hex_output:6;
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unsigned metaphysical:1;
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unsigned access:3;
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unsigned invalid:1;
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};
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};
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struct kvm_mmu_page {
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struct list_head link;
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struct hlist_node hash_link;
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/*
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* The following two entries are used to key the shadow page in the
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* hash table.
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*/
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gfn_t gfn;
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union kvm_mmu_page_role role;
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u64 *spt;
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/* hold the gfn of each spte inside spt */
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gfn_t *gfns;
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unsigned long slot_bitmap; /* One bit set per slot which has memory
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* in this shadow page.
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*/
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int multimapped; /* More than one parent_pte? */
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int root_count; /* Currently serving as active root */
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union {
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u64 *parent_pte; /* !multimapped */
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struct hlist_head parent_ptes; /* multimapped, kvm_pte_chain */
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};
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};
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/*
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* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
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* 32-bit). The kvm_mmu structure abstracts the details of the current mmu
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* mode.
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*/
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struct kvm_mmu {
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void (*new_cr3)(struct kvm_vcpu *vcpu);
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int (*page_fault)(struct kvm_vcpu *vcpu, gva_t gva, u32 err);
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void (*free)(struct kvm_vcpu *vcpu);
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gpa_t (*gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t gva);
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void (*prefetch_page)(struct kvm_vcpu *vcpu,
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struct kvm_mmu_page *page);
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hpa_t root_hpa;
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int root_level;
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int shadow_root_level;
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u64 *pae_root;
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};
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struct kvm_vcpu_arch {
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u64 host_tsc;
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int interrupt_window_open;
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unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
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DECLARE_BITMAP(irq_pending, KVM_NR_INTERRUPTS);
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unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
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unsigned long rip; /* needs vcpu_load_rsp_rip() */
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unsigned long cr0;
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unsigned long cr2;
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unsigned long cr3;
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unsigned long cr4;
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unsigned long cr8;
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u64 pdptrs[4]; /* pae */
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u64 shadow_efer;
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u64 apic_base;
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struct kvm_lapic *apic; /* kernel irqchip context */
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int mp_state;
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int sipi_vector;
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u64 ia32_misc_enable_msr;
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bool tpr_access_reporting;
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struct kvm_mmu mmu;
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struct kvm_mmu_memory_cache mmu_pte_chain_cache;
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struct kvm_mmu_memory_cache mmu_rmap_desc_cache;
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struct kvm_mmu_memory_cache mmu_page_cache;
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struct kvm_mmu_memory_cache mmu_page_header_cache;
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gfn_t last_pt_write_gfn;
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int last_pt_write_count;
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u64 *last_pte_updated;
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gfn_t last_pte_gfn;
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struct {
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gfn_t gfn; /* presumed gfn during guest pte update */
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pfn_t pfn; /* pfn corresponding to that gfn */
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int largepage;
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} update_pte;
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struct i387_fxsave_struct host_fx_image;
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struct i387_fxsave_struct guest_fx_image;
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gva_t mmio_fault_cr2;
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struct kvm_pio_request pio;
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void *pio_data;
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struct kvm_queued_exception {
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bool pending;
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bool has_error_code;
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u8 nr;
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u32 error_code;
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} exception;
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struct {
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int active;
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u8 save_iopl;
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struct kvm_save_segment {
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u16 selector;
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unsigned long base;
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u32 limit;
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u32 ar;
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} tr, es, ds, fs, gs;
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} rmode;
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int halt_request; /* real mode on Intel only */
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int cpuid_nent;
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struct kvm_cpuid_entry2 cpuid_entries[KVM_MAX_CPUID_ENTRIES];
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/* emulate context */
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struct x86_emulate_ctxt emulate_ctxt;
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gpa_t time;
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struct pvclock_vcpu_time_info hv_clock;
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unsigned int hv_clock_tsc_khz;
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unsigned int time_offset;
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struct page *time_page;
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bool nmi_pending;
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u64 mtrr[0x100];
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};
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struct kvm_mem_alias {
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gfn_t base_gfn;
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unsigned long npages;
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gfn_t target_gfn;
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};
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struct kvm_arch{
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int naliases;
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struct kvm_mem_alias aliases[KVM_ALIAS_SLOTS];
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unsigned int n_free_mmu_pages;
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unsigned int n_requested_mmu_pages;
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unsigned int n_alloc_mmu_pages;
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struct hlist_head mmu_page_hash[KVM_NUM_MMU_PAGES];
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/*
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* Hash table of struct kvm_mmu_page.
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*/
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struct list_head active_mmu_pages;
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struct kvm_pic *vpic;
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struct kvm_ioapic *vioapic;
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struct kvm_pit *vpit;
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int round_robin_prev_vcpu;
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unsigned int tss_addr;
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struct page *apic_access_page;
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gpa_t wall_clock;
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struct page *ept_identity_pagetable;
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bool ept_identity_pagetable_done;
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};
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struct kvm_vm_stat {
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u32 mmu_shadow_zapped;
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u32 mmu_pte_write;
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u32 mmu_pte_updated;
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u32 mmu_pde_zapped;
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u32 mmu_flooded;
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u32 mmu_recycled;
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u32 mmu_cache_miss;
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u32 remote_tlb_flush;
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u32 lpages;
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};
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struct kvm_vcpu_stat {
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u32 pf_fixed;
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u32 pf_guest;
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u32 tlb_flush;
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u32 invlpg;
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u32 exits;
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u32 io_exits;
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u32 mmio_exits;
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u32 signal_exits;
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u32 irq_window_exits;
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u32 nmi_window_exits;
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u32 halt_exits;
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u32 halt_wakeup;
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u32 request_irq_exits;
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u32 irq_exits;
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u32 host_state_reload;
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u32 efer_reload;
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u32 fpu_reload;
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u32 insn_emulation;
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u32 insn_emulation_fail;
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u32 hypercalls;
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};
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struct descriptor_table {
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u16 limit;
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unsigned long base;
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} __attribute__((packed));
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struct kvm_x86_ops {
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int (*cpu_has_kvm_support)(void); /* __init */
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int (*disabled_by_bios)(void); /* __init */
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void (*hardware_enable)(void *dummy); /* __init */
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void (*hardware_disable)(void *dummy);
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void (*check_processor_compatibility)(void *rtn);
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int (*hardware_setup)(void); /* __init */
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void (*hardware_unsetup)(void); /* __exit */
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bool (*cpu_has_accelerated_tpr)(void);
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/* Create, but do not attach this VCPU */
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struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned id);
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void (*vcpu_free)(struct kvm_vcpu *vcpu);
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int (*vcpu_reset)(struct kvm_vcpu *vcpu);
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void (*prepare_guest_switch)(struct kvm_vcpu *vcpu);
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void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
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void (*vcpu_put)(struct kvm_vcpu *vcpu);
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int (*set_guest_debug)(struct kvm_vcpu *vcpu,
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struct kvm_debug_guest *dbg);
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void (*guest_debug_pre)(struct kvm_vcpu *vcpu);
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int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata);
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int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
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u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg);
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void (*get_segment)(struct kvm_vcpu *vcpu,
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struct kvm_segment *var, int seg);
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int (*get_cpl)(struct kvm_vcpu *vcpu);
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void (*set_segment)(struct kvm_vcpu *vcpu,
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struct kvm_segment *var, int seg);
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void (*get_cs_db_l_bits)(struct kvm_vcpu *vcpu, int *db, int *l);
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void (*decache_cr4_guest_bits)(struct kvm_vcpu *vcpu);
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void (*set_cr0)(struct kvm_vcpu *vcpu, unsigned long cr0);
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void (*set_cr3)(struct kvm_vcpu *vcpu, unsigned long cr3);
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void (*set_cr4)(struct kvm_vcpu *vcpu, unsigned long cr4);
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void (*set_efer)(struct kvm_vcpu *vcpu, u64 efer);
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void (*get_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
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void (*set_idt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
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void (*get_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
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void (*set_gdt)(struct kvm_vcpu *vcpu, struct descriptor_table *dt);
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unsigned long (*get_dr)(struct kvm_vcpu *vcpu, int dr);
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void (*set_dr)(struct kvm_vcpu *vcpu, int dr, unsigned long value,
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int *exception);
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void (*cache_regs)(struct kvm_vcpu *vcpu);
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void (*decache_regs)(struct kvm_vcpu *vcpu);
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unsigned long (*get_rflags)(struct kvm_vcpu *vcpu);
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void (*set_rflags)(struct kvm_vcpu *vcpu, unsigned long rflags);
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void (*tlb_flush)(struct kvm_vcpu *vcpu);
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void (*run)(struct kvm_vcpu *vcpu, struct kvm_run *run);
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int (*handle_exit)(struct kvm_run *run, struct kvm_vcpu *vcpu);
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void (*skip_emulated_instruction)(struct kvm_vcpu *vcpu);
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void (*patch_hypercall)(struct kvm_vcpu *vcpu,
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unsigned char *hypercall_addr);
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int (*get_irq)(struct kvm_vcpu *vcpu);
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void (*set_irq)(struct kvm_vcpu *vcpu, int vec);
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void (*queue_exception)(struct kvm_vcpu *vcpu, unsigned nr,
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bool has_error_code, u32 error_code);
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bool (*exception_injected)(struct kvm_vcpu *vcpu);
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void (*inject_pending_irq)(struct kvm_vcpu *vcpu);
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void (*inject_pending_vectors)(struct kvm_vcpu *vcpu,
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struct kvm_run *run);
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int (*set_tss_addr)(struct kvm *kvm, unsigned int addr);
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int (*get_tdp_level)(void);
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};
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extern struct kvm_x86_ops *kvm_x86_ops;
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int kvm_mmu_module_init(void);
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void kvm_mmu_module_exit(void);
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void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
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int kvm_mmu_create(struct kvm_vcpu *vcpu);
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int kvm_mmu_setup(struct kvm_vcpu *vcpu);
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void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
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void kvm_mmu_set_base_ptes(u64 base_pte);
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void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
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u64 dirty_mask, u64 nx_mask, u64 x_mask);
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int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
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void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
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void kvm_mmu_zap_all(struct kvm *kvm);
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unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
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void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages);
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int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3);
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int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
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const void *val, int bytes);
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int kvm_pv_mmu_op(struct kvm_vcpu *vcpu, unsigned long bytes,
|
|
gpa_t addr, unsigned long *ret);
|
|
|
|
extern bool tdp_enabled;
|
|
|
|
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);
|
|
void kvm_enable_efer_bits(u64);
|
|
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 kvm_get_segment(struct kvm_vcpu *vcpu, struct kvm_segment *var, int seg);
|
|
int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector,
|
|
int type_bits, int seg);
|
|
|
|
int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason);
|
|
|
|
void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0);
|
|
void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
|
|
void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
|
|
void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8);
|
|
unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu);
|
|
void kvm_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 kvm_inject_nmi(struct kvm_vcpu *vcpu);
|
|
|
|
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);
|
|
|
|
void kvm_enable_tdp(void);
|
|
|
|
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 kvm_read_fs(void)
|
|
{
|
|
u16 seg;
|
|
asm("mov %%fs, %0" : "=g"(seg));
|
|
return seg;
|
|
}
|
|
|
|
static inline u16 kvm_read_gs(void)
|
|
{
|
|
u16 seg;
|
|
asm("mov %%gs, %0" : "=g"(seg));
|
|
return seg;
|
|
}
|
|
|
|
static inline u16 kvm_read_ldt(void)
|
|
{
|
|
u16 ldt;
|
|
asm("sldt %0" : "=g"(ldt));
|
|
return ldt;
|
|
}
|
|
|
|
static inline void kvm_load_fs(u16 sel)
|
|
{
|
|
asm("mov %0, %%fs" : : "rm"(sel));
|
|
}
|
|
|
|
static inline void kvm_load_gs(u16 sel)
|
|
{
|
|
asm("mov %0, %%gs" : : "rm"(sel));
|
|
}
|
|
|
|
static inline void kvm_load_ldt(u16 sel)
|
|
{
|
|
asm("lldt %0" : : "rm"(sel));
|
|
}
|
|
|
|
static inline void kvm_get_idt(struct descriptor_table *table)
|
|
{
|
|
asm("sidt %0" : "=m"(*table));
|
|
}
|
|
|
|
static inline void kvm_get_gdt(struct descriptor_table *table)
|
|
{
|
|
asm("sgdt %0" : "=m"(*table));
|
|
}
|
|
|
|
static inline unsigned long kvm_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 kvm_fx_save(struct i387_fxsave_struct *image)
|
|
{
|
|
asm("fxsave (%0)":: "r" (image));
|
|
}
|
|
|
|
static inline void kvm_fx_restore(struct i387_fxsave_struct *image)
|
|
{
|
|
asm("fxrstor (%0)":: "r" (image));
|
|
}
|
|
|
|
static inline void kvm_fx_finit(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 ASM_VMX_INVEPT ".byte 0x66, 0x0f, 0x38, 0x80, 0x08"
|
|
#define ASM_VMX_INVVPID ".byte 0x66, 0x0f, 0x38, 0x81, 0x08"
|
|
|
|
#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)
|
|
|
|
enum {
|
|
TASK_SWITCH_CALL = 0,
|
|
TASK_SWITCH_IRET = 1,
|
|
TASK_SWITCH_JMP = 2,
|
|
TASK_SWITCH_GATE = 3,
|
|
};
|
|
|
|
#define KVMTRACE_5D(evt, vcpu, d1, d2, d3, d4, d5, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 5, d1, d2, d3, d4, d5)
|
|
#define KVMTRACE_4D(evt, vcpu, d1, d2, d3, d4, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 4, d1, d2, d3, d4, 0)
|
|
#define KVMTRACE_3D(evt, vcpu, d1, d2, d3, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 3, d1, d2, d3, 0, 0)
|
|
#define KVMTRACE_2D(evt, vcpu, d1, d2, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 2, d1, d2, 0, 0, 0)
|
|
#define KVMTRACE_1D(evt, vcpu, d1, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 1, d1, 0, 0, 0, 0)
|
|
#define KVMTRACE_0D(evt, vcpu, name) \
|
|
trace_mark(kvm_trace_##name, "%u %p %u %u %u %u %u %u", KVM_TRC_##evt, \
|
|
vcpu, 0, 0, 0, 0, 0, 0)
|
|
|
|
#ifdef CONFIG_64BIT
|
|
# define KVM_EX_ENTRY ".quad"
|
|
# define KVM_EX_PUSH "pushq"
|
|
#else
|
|
# define KVM_EX_ENTRY ".long"
|
|
# define KVM_EX_PUSH "pushl"
|
|
#endif
|
|
|
|
/*
|
|
* Hardware virtualization extension instructions may fault if a
|
|
* reboot turns off virtualization while processes are running.
|
|
* Trap the fault and ignore the instruction if that happens.
|
|
*/
|
|
asmlinkage void kvm_handle_fault_on_reboot(void);
|
|
|
|
#define __kvm_handle_fault_on_reboot(insn) \
|
|
"666: " insn "\n\t" \
|
|
".pushsection .text.fixup, \"ax\" \n" \
|
|
"667: \n\t" \
|
|
KVM_EX_PUSH " $666b \n\t" \
|
|
"jmp kvm_handle_fault_on_reboot \n\t" \
|
|
".popsection \n\t" \
|
|
".pushsection __ex_table, \"a\" \n\t" \
|
|
KVM_EX_ENTRY " 666b, 667b \n\t" \
|
|
".popsection"
|
|
|
|
#endif
|