Merge tag 'kvm-arm-for-4.3-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git...

[cascardo/linux.git] / arch / arm64 / include / asm / kvm_host.h

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 2709db2..4562459 100644 (file)
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -30,12 +30,6 @@
 
 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
 
-#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
-#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
-#else
-#define KVM_MAX_VCPUS 0
-#endif
-
 #define KVM_USER_MEM_SLOTS 32
 #define KVM_PRIVATE_MEM_SLOTS 4
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
@@ -43,6 +37,8 @@
 #include <kvm/arm_vgic.h>
 #include <kvm/arm_arch_timer.h>
 
+#define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
+
 #define KVM_VCPU_MAX_FEATURES 3
 
 int __attribute_const__ kvm_target_cpu(void);
@@ -103,15 +99,34 @@ struct kvm_vcpu_arch {
 
        /* HYP configuration */
        u64 hcr_el2;
+       u32 mdcr_el2;
 
        /* Exception Information */
        struct kvm_vcpu_fault_info fault;
 
-       /* Debug state */
+       /* Guest debug state */
        u64 debug_flags;
 
+       /*
+        * We maintain more than a single set of debug registers to support
+        * debugging the guest from the host and to maintain separate host and
+        * guest state during world switches. vcpu_debug_state are the debug
+        * registers of the vcpu as the guest sees them.  host_debug_state are
+        * the host registers which are saved and restored during
+        * world switches. external_debug_state contains the debug
+        * values we want to debug the guest. This is set via the
+        * KVM_SET_GUEST_DEBUG ioctl.
+        *
+        * debug_ptr points to the set of debug registers that should be loaded
+        * onto the hardware when running the guest.
+        */
+       struct kvm_guest_debug_arch *debug_ptr;
+       struct kvm_guest_debug_arch vcpu_debug_state;
+       struct kvm_guest_debug_arch external_debug_state;
+
        /* Pointer to host CPU context */
        kvm_cpu_context_t *host_cpu_context;
+       struct kvm_guest_debug_arch host_debug_state;
 
        /* VGIC state */
        struct vgic_cpu vgic_cpu;
@@ -122,6 +137,17 @@ struct kvm_vcpu_arch {
         * here.
         */
 
+       /*
+        * Guest registers we preserve during guest debugging.
+        *
+        * These shadow registers are updated by the kvm_handle_sys_reg
+        * trap handler if the guest accesses or updates them while we
+        * are using guest debug.
+        */
+       struct {
+               u32     mdscr_el1;
+       } guest_debug_preserved;
+
        /* Don't run the guest */
        bool pause;
 
@@ -165,6 +191,7 @@ struct kvm_vm_stat {
 
 struct kvm_vcpu_stat {
        u32 halt_successful_poll;
+       u32 halt_attempted_poll;
        u32 halt_wakeup;
 };
 
@@ -216,15 +243,15 @@ static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
                     hyp_stack_ptr, vector_ptr);
 }
 
-struct vgic_sr_vectors {
-       void    *save_vgic;
-       void    *restore_vgic;
-};
-
 static inline void kvm_arch_hardware_disable(void) {}
 static inline void kvm_arch_hardware_unsetup(void) {}
 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
 
+void kvm_arm_init_debug(void);
+void kvm_arm_setup_debug(struct kvm_vcpu *vcpu);
+void kvm_arm_clear_debug(struct kvm_vcpu *vcpu);
+void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu);
+
 #endif /* __ARM64_KVM_HOST_H__ */