Merge branch 'topic/ppc-kvm' into next

Merge some powerpc KVM patches from our topic branch.

In particular this brings in Nick's big series rewriting parts of the
guest entry/exit path in C.

Conflicts:
	arch/powerpc/kernel/security.c
	arch/powerpc/kvm/book3s_hv_rmhandlers.S

arch/powerpc/include/asm/asm-prototypes.h

@@ -120,6 +120,7 @@ extern s32 patch__call_flush_branch_caches3;
 extern s32 patch__flush_count_cache_return;
 extern s32 patch__flush_link_stack_return;
 extern s32 patch__call_kvm_flush_link_stack;
+extern s32 patch__call_kvm_flush_link_stack_p9;
 extern s32 patch__memset_nocache, patch__memcpy_nocache;
 
 extern long flush_branch_caches;
@@ -140,7 +141,7 @@ void kvmhv_load_host_pmu(void);
 void kvmhv_save_guest_pmu(struct kvm_vcpu *vcpu, bool pmu_in_use);
 void kvmhv_load_guest_pmu(struct kvm_vcpu *vcpu);
 
-int __kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu);
+void kvmppc_p9_enter_guest(struct kvm_vcpu *vcpu);
 
 long kvmppc_h_set_dabr(struct kvm_vcpu *vcpu, unsigned long dabr);
 long kvmppc_h_set_xdabr(struct kvm_vcpu *vcpu, unsigned long dabr,

arch/powerpc/include/asm/exception-64s.h

@@ -35,6 +35,19 @@
 /* PACA save area size in u64 units (exgen, exmc, etc) */
 #define EX_SIZE		10
 
+/* PACA save area offsets */
+#define EX_R9		0
+#define EX_R10		8
+#define EX_R11		16
+#define EX_R12		24
+#define EX_R13		32
+#define EX_DAR		40
+#define EX_DSISR	48
+#define EX_CCR		52
+#define EX_CFAR		56
+#define EX_PPR		64
+#define EX_CTR		72
+
 /*
  * maximum recursive depth of MCE exceptions
  */

arch/powerpc/include/asm/kvm_asm.h

@@ -147,6 +147,7 @@
 #define KVM_GUEST_MODE_SKIP	2
 #define KVM_GUEST_MODE_GUEST_HV	3
 #define KVM_GUEST_MODE_HOST_HV	4
+#define KVM_GUEST_MODE_HV_P9	5 /* ISA >= v3.0 path */
 
 #define KVM_INST_FETCH_FAILED	-1
 

arch/powerpc/include/asm/kvm_book3s_64.h

@@ -153,9 +153,17 @@ static inline bool kvmhv_vcpu_is_radix(struct kvm_vcpu *vcpu)
 	return radix;
 }
 
+int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpcr);
+
 #define KVM_DEFAULT_HPT_ORDER	24	/* 16MB HPT by default */
 #endif
 
+/*
+ * Invalid HDSISR value which is used to indicate when HW has not set the reg.
+ * Used to work around an errata.
+ */
+#define HDSISR_CANARY	0x7fff
+
 /*
  * We use a lock bit in HPTE dword 0 to synchronize updates and
  * accesses to each HPTE, and another bit to indicate non-present

arch/powerpc/include/asm/kvm_host.h

@@ -297,7 +297,6 @@ struct kvm_arch {
 	u8 fwnmi_enabled;
 	u8 secure_guest;
 	u8 svm_enabled;
-	bool threads_indep;
 	bool nested_enable;
 	bool dawr1_enabled;
 	pgd_t *pgtable;
@@ -683,7 +682,12 @@ struct kvm_vcpu_arch {
 	ulong fault_dar;
 	u32 fault_dsisr;
 	unsigned long intr_msr;
-	ulong fault_gpa;	/* guest real address of page fault (POWER9) */
+	/*
+	 * POWER9 and later: fault_gpa contains the guest real address of page
+	 * fault for a radix guest, or segment descriptor (equivalent to result
+	 * from slbmfev of SLB entry that translated the EA) for hash guests.
+	 */
+	ulong fault_gpa;
 #endif
 
 #ifdef CONFIG_BOOKE

arch/powerpc/include/asm/kvm_ppc.h

@@ -129,6 +129,7 @@ extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
 extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
 extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
 extern void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags);
+extern void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu);
 extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
 extern void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu);
 extern void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu);
@@ -606,6 +607,7 @@ extern void kvmppc_free_pimap(struct kvm *kvm);
 extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
 extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
+extern int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req);
 extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
 extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
 extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
@@ -638,6 +640,8 @@ static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
 static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
 	{ return 0; }
+static inline int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req)
+	{ return 0; }
 #endif
 
 #ifdef CONFIG_KVM_XIVE
@@ -655,8 +659,6 @@ extern int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
 				u32 *priority);
 extern int kvmppc_xive_int_on(struct kvm *kvm, u32 irq);
 extern int kvmppc_xive_int_off(struct kvm *kvm, u32 irq);
-extern void kvmppc_xive_init_module(void);
-extern void kvmppc_xive_exit_module(void);
 
 extern int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
 				    struct kvm_vcpu *vcpu, u32 cpu);
@@ -671,6 +673,8 @@ extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
 extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
 			       int level, bool line_status);
 extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu);
+extern void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu);
+extern void kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu);
 
 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
 {
@@ -680,8 +684,6 @@ static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
 extern int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
 					   struct kvm_vcpu *vcpu, u32 cpu);
 extern void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu);
-extern void kvmppc_xive_native_init_module(void);
-extern void kvmppc_xive_native_exit_module(void);
 extern int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
 				     union kvmppc_one_reg *val);
 extern int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
@@ -695,8 +697,6 @@ static inline int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
 				       u32 *priority) { return -1; }
 static inline int kvmppc_xive_int_on(struct kvm *kvm, u32 irq) { return -1; }
 static inline int kvmppc_xive_int_off(struct kvm *kvm, u32 irq) { return -1; }
-static inline void kvmppc_xive_init_module(void) { }
-static inline void kvmppc_xive_exit_module(void) { }
 
 static inline int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
 					   struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
@@ -711,14 +711,14 @@ static inline int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval) { retur
 static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
 				      int level, bool line_status) { return -ENODEV; }
 static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { }
+static inline void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu) { }
+static inline void kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu) { }
 
 static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
 	{ return 0; }
 static inline int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
 			  struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
 static inline void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
-static inline void kvmppc_xive_native_init_module(void) { }
-static inline void kvmppc_xive_native_exit_module(void) { }
 static inline int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
 					    union kvmppc_one_reg *val)
 { return 0; }
@@ -754,7 +754,7 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
 			   unsigned long tce_value, unsigned long npages);
 long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
                             unsigned int yield_count);
-long kvmppc_h_random(struct kvm_vcpu *vcpu);
+long kvmppc_rm_h_random(struct kvm_vcpu *vcpu);
 void kvmhv_commence_exit(int trap);
 void kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
 void kvmppc_subcore_enter_guest(void);

arch/powerpc/include/asm/mmu_context.h

@@ -121,12 +121,6 @@ static inline bool need_extra_context(struct mm_struct *mm, unsigned long ea)
 }
 #endif
 
-#if defined(CONFIG_KVM_BOOK3S_HV_POSSIBLE) && defined(CONFIG_PPC_RADIX_MMU)
-extern void radix_kvm_prefetch_workaround(struct mm_struct *mm);
-#else
-static inline void radix_kvm_prefetch_workaround(struct mm_struct *mm) { }
-#endif
-
 extern void switch_cop(struct mm_struct *next);
 extern int use_cop(unsigned long acop, struct mm_struct *mm);
 extern void drop_cop(unsigned long acop, struct mm_struct *mm);

arch/powerpc/include/asm/time.h

@@ -97,6 +97,18 @@ extern void div128_by_32(u64 dividend_high, u64 dividend_low,
 extern void secondary_cpu_time_init(void);
 extern void __init time_init(void);
 
+#ifdef CONFIG_PPC64
+static inline unsigned long test_irq_work_pending(void)
+{
+	unsigned long x;
+
+	asm volatile("lbz %0,%1(13)"
+		: "=r" (x)
+		: "i" (offsetof(struct paca_struct, irq_work_pending)));
+	return x;
+}
+#endif
+
 DECLARE_PER_CPU(u64, decrementers_next_tb);
 
 /* Convert timebase ticks to nanoseconds */

arch/powerpc/kernel/asm-offsets.c

@@ -473,7 +473,6 @@ int main(void)
 	OFFSET(VCPU_SLB_NR, kvm_vcpu, arch.slb_nr);
 	OFFSET(VCPU_FAULT_DSISR, kvm_vcpu, arch.fault_dsisr);
 	OFFSET(VCPU_FAULT_DAR, kvm_vcpu, arch.fault_dar);
-	OFFSET(VCPU_FAULT_GPA, kvm_vcpu, arch.fault_gpa);
 	OFFSET(VCPU_INTR_MSR, kvm_vcpu, arch.intr_msr);
 	OFFSET(VCPU_LAST_INST, kvm_vcpu, arch.last_inst);
 	OFFSET(VCPU_TRAP, kvm_vcpu, arch.trap);