c7c9c56ca2
Virtual interrupt delivery avoids KVM to inject vAPIC interrupts manually, which is fully taken care of by the hardware. This needs some special awareness into existing interrupr injection path: - for pending interrupt, instead of direct injection, we may need update architecture specific indicators before resuming to guest. - A pending interrupt, which is masked by ISR, should be also considered in above update action, since hardware will decide when to inject it at right time. Current has_interrupt and get_interrupt only returns a valid vector from injection p.o.v. Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Kevin Tian <kevin.tian@intel.com> Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
161 lines
4.8 KiB
C
161 lines
4.8 KiB
C
#ifndef __KVM_X86_LAPIC_H
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#define __KVM_X86_LAPIC_H
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#include "iodev.h"
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#include <linux/kvm_host.h>
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struct kvm_timer {
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struct hrtimer timer;
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s64 period; /* unit: ns */
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u32 timer_mode_mask;
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u64 tscdeadline;
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atomic_t pending; /* accumulated triggered timers */
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};
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struct kvm_lapic {
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unsigned long base_address;
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struct kvm_io_device dev;
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struct kvm_timer lapic_timer;
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u32 divide_count;
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struct kvm_vcpu *vcpu;
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bool irr_pending;
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/* Number of bits set in ISR. */
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s16 isr_count;
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/* The highest vector set in ISR; if -1 - invalid, must scan ISR. */
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int highest_isr_cache;
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/**
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* APIC register page. The layout matches the register layout seen by
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* the guest 1:1, because it is accessed by the vmx microcode.
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* Note: Only one register, the TPR, is used by the microcode.
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*/
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void *regs;
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gpa_t vapic_addr;
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struct page *vapic_page;
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};
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int kvm_create_lapic(struct kvm_vcpu *vcpu);
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void kvm_free_lapic(struct kvm_vcpu *vcpu);
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int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);
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int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);
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int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);
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void kvm_lapic_reset(struct kvm_vcpu *vcpu);
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u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);
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void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);
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void kvm_lapic_set_eoi(struct kvm_vcpu *vcpu);
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void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);
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u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
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void kvm_apic_set_version(struct kvm_vcpu *vcpu);
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int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);
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int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);
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int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);
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int kvm_apic_local_deliver(struct kvm_lapic *apic, int lvt_type);
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bool kvm_irq_delivery_to_apic_fast(struct kvm *kvm, struct kvm_lapic *src,
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struct kvm_lapic_irq *irq, int *r);
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u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);
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void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);
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void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu,
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struct kvm_lapic_state *s);
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int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);
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u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu);
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void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data);
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void kvm_apic_write_nodecode(struct kvm_vcpu *vcpu, u32 offset);
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void kvm_apic_set_eoi_accelerated(struct kvm_vcpu *vcpu, int vector);
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void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr);
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void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu);
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void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu);
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int kvm_x2apic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
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int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
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int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
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int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
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static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
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}
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int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
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void kvm_lapic_init(void);
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static inline u32 kvm_apic_get_reg(struct kvm_lapic *apic, int reg_off)
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{
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return *((u32 *) (apic->regs + reg_off));
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}
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extern struct static_key kvm_no_apic_vcpu;
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static inline bool kvm_vcpu_has_lapic(struct kvm_vcpu *vcpu)
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{
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if (static_key_false(&kvm_no_apic_vcpu))
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return vcpu->arch.apic;
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return true;
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}
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extern struct static_key_deferred apic_hw_disabled;
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static inline int kvm_apic_hw_enabled(struct kvm_lapic *apic)
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{
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if (static_key_false(&apic_hw_disabled.key))
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return apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_ENABLE;
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return MSR_IA32_APICBASE_ENABLE;
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}
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extern struct static_key_deferred apic_sw_disabled;
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static inline int kvm_apic_sw_enabled(struct kvm_lapic *apic)
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{
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if (static_key_false(&apic_sw_disabled.key))
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return kvm_apic_get_reg(apic, APIC_SPIV) & APIC_SPIV_APIC_ENABLED;
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return APIC_SPIV_APIC_ENABLED;
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}
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static inline bool kvm_apic_present(struct kvm_vcpu *vcpu)
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{
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return kvm_vcpu_has_lapic(vcpu) && kvm_apic_hw_enabled(vcpu->arch.apic);
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}
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static inline int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
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{
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return kvm_apic_present(vcpu) && kvm_apic_sw_enabled(vcpu->arch.apic);
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}
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static inline int apic_x2apic_mode(struct kvm_lapic *apic)
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{
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return apic->vcpu->arch.apic_base & X2APIC_ENABLE;
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}
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static inline bool kvm_apic_vid_enabled(struct kvm *kvm)
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{
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return kvm_x86_ops->vm_has_apicv(kvm);
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}
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static inline u16 apic_cluster_id(struct kvm_apic_map *map, u32 ldr)
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{
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u16 cid;
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ldr >>= 32 - map->ldr_bits;
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cid = (ldr >> map->cid_shift) & map->cid_mask;
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BUG_ON(cid >= ARRAY_SIZE(map->logical_map));
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return cid;
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}
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static inline u16 apic_logical_id(struct kvm_apic_map *map, u32 ldr)
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{
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ldr >>= (32 - map->ldr_bits);
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return ldr & map->lid_mask;
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}
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void kvm_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
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struct kvm_lapic_irq *irq,
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u64 *eoi_bitmap);
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#endif
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