Merge tag 'kvm-s390-next-4.17-1' of...

Merge tag 'kvm-s390-next-4.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: fixes and features

- more kvm stat counters
- virtio gpu plumbing. The 3 non-KVM/s390 patches have Acks from
  Bartlomiej Zolnierkiewicz, Heiko Carstens and Greg Kroah-Hartman
  but all belong together to make virtio-gpu work as a tty. So
  I carried them in the KVM/s390 tree.
- document some KVM_CAPs
- cpu-model only facilities
- cleanups

Documentation/virtual/kvm/api.txt

@@ -4555,3 +4555,33 @@ Parameters: none
 This capability indicates if the flic device will be able to get/set the
 AIS states for migration via the KVM_DEV_FLIC_AISM_ALL attribute and allows
 to discover this without having to create a flic device.
+
+8.14 KVM_CAP_S390_PSW
+
+Architectures: s390
+
+This capability indicates that the PSW is exposed via the kvm_run structure.
+
+8.15 KVM_CAP_S390_GMAP
+
+Architectures: s390
+
+This capability indicates that the user space memory used as guest mapping can
+be anywhere in the user memory address space, as long as the memory slots are
+aligned and sized to a segment (1MB) boundary.
+
+8.16 KVM_CAP_S390_COW
+
+Architectures: s390
+
+This capability indicates that the user space memory used as guest mapping can
+use copy-on-write semantics as well as dirty pages tracking via read-only page
+tables.
+
+8.17 KVM_CAP_S390_BPB
+
+Architectures: s390
+
+This capability indicates that kvm will implement the interfaces to handle
+reset, migration and nested KVM for branch prediction blocking. The stfle
+facility 82 should not be provided to the guest without this capability.

arch/s390/include/asm/kvm_host.h

@@ -294,6 +294,7 @@ struct kvm_vcpu_stat {
 	u64 exit_userspace;
 	u64 exit_null;
 	u64 exit_external_request;
+	u64 exit_io_request;
 	u64 exit_external_interrupt;
 	u64 exit_stop_request;
 	u64 exit_validity;
@@ -310,16 +311,29 @@ struct kvm_vcpu_stat {
 	u64 exit_program_interruption;
 	u64 exit_instr_and_program;
 	u64 exit_operation_exception;
+	u64 deliver_ckc;
+	u64 deliver_cputm;
 	u64 deliver_external_call;
 	u64 deliver_emergency_signal;
 	u64 deliver_service_signal;
-	u64 deliver_virtio_interrupt;
+	u64 deliver_virtio;
 	u64 deliver_stop_signal;
 	u64 deliver_prefix_signal;
 	u64 deliver_restart_signal;
-	u64 deliver_program_int;
-	u64 deliver_io_int;
+	u64 deliver_program;
+	u64 deliver_io;
+	u64 deliver_machine_check;
 	u64 exit_wait_state;
+	u64 inject_ckc;
+	u64 inject_cputm;
+	u64 inject_external_call;
+	u64 inject_emergency_signal;
+	u64 inject_mchk;
+	u64 inject_pfault_init;
+	u64 inject_program;
+	u64 inject_restart;
+	u64 inject_set_prefix;
+	u64 inject_stop_signal;
 	u64 instruction_epsw;
 	u64 instruction_gs;
 	u64 instruction_io_other;
@@ -644,7 +658,12 @@ struct kvm_vcpu_arch {
 };
 
 struct kvm_vm_stat {
-	ulong remote_tlb_flush;
+	u64 inject_io;
+	u64 inject_float_mchk;
+	u64 inject_pfault_done;
+	u64 inject_service_signal;
+	u64 inject_virtio;
+	u64 remote_tlb_flush;
 };
 
 struct kvm_arch_memory_slot {
@@ -792,6 +811,7 @@ struct kvm_arch{
 	int css_support;
 	int use_irqchip;
 	int use_cmma;
+	int use_pfmfi;
 	int user_cpu_state_ctrl;
 	int user_sigp;
 	int user_stsi;

arch/s390/include/asm/mmu.h

@@ -22,8 +22,8 @@ typedef struct {
 	unsigned int has_pgste:1;
 	/* The mmu context uses storage keys. */
 	unsigned int use_skey:1;
-	/* The mmu context uses CMMA. */
-	unsigned int use_cmma:1;
+	/* The mmu context uses CMM. */
+	unsigned int uses_cmm:1;
 } mm_context_t;
 
 #define INIT_MM_CONTEXT(name)						   \

arch/s390/include/asm/mmu_context.h

@@ -31,7 +31,7 @@ static inline int init_new_context(struct task_struct *tsk,
 		(current->mm && current->mm->context.alloc_pgste);
 	mm->context.has_pgste = 0;
 	mm->context.use_skey = 0;
-	mm->context.use_cmma = 0;
+	mm->context.uses_cmm = 0;
 #endif
 	switch (mm->context.asce_limit) {
 	case _REGION2_SIZE:

arch/s390/kernel/setup.c

@@ -221,6 +221,8 @@ static void __init conmode_default(void)
 		SET_CONSOLE_SCLP;
 #endif
 	}
+	if (IS_ENABLED(CONFIG_VT) && IS_ENABLED(CONFIG_DUMMY_CONSOLE))
+		conswitchp = &dummy_con;
 }
 
 #ifdef CONFIG_CRASH_DUMP

arch/s390/kvm/gaccess.c

@@ -1050,8 +1050,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
 		rc = gmap_shadow_r2t(sg, saddr, rfte.val, *fake);
 		if (rc)
 			return rc;
-		/* fallthrough */
-	}
+	} /* fallthrough */
 	case ASCE_TYPE_REGION2: {
 		union region2_table_entry rste;
 
@@ -1077,8 +1076,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
 		rc = gmap_shadow_r3t(sg, saddr, rste.val, *fake);
 		if (rc)
 			return rc;
-		/* fallthrough */
-	}
+	} /* fallthrough */
 	case ASCE_TYPE_REGION3: {
 		union region3_table_entry rtte;
 
@@ -1113,8 +1111,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
 		rc = gmap_shadow_sgt(sg, saddr, rtte.val, *fake);
 		if (rc)
 			return rc;
-		/* fallthrough */
-	}
+	} /* fallthrough */
 	case ASCE_TYPE_SEGMENT: {
 		union segment_table_entry ste;
 

arch/s390/kvm/intercept.c

@@ -50,18 +50,6 @@ u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
 	return ilen;
 }
 
-static int handle_noop(struct kvm_vcpu *vcpu)
-{
-	switch (vcpu->arch.sie_block->icptcode) {
-	case 0x10:
-		vcpu->stat.exit_external_request++;
-		break;
-	default:
-		break; /* nothing */
-	}
-	return 0;
-}
-
 static int handle_stop(struct kvm_vcpu *vcpu)
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
@@ -465,8 +453,11 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
 
 	switch (vcpu->arch.sie_block->icptcode) {
 	case ICPT_EXTREQ:
+		vcpu->stat.exit_external_request++;
+		return 0;
 	case ICPT_IOREQ:
-		return handle_noop(vcpu);
+		vcpu->stat.exit_io_request++;
+		return 0;
 	case ICPT_INST:
 		rc = handle_instruction(vcpu);
 		break;

arch/s390/kvm/interrupt.c

@@ -391,6 +391,7 @@ static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu)
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 	int rc;
 
+	vcpu->stat.deliver_cputm++;
 	trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
 					 0, 0);
 
@@ -410,6 +411,7 @@ static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu)
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 	int rc;
 
+	vcpu->stat.deliver_ckc++;
 	trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
 					 0, 0);
 
@@ -595,6 +597,7 @@ static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
 		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 						 KVM_S390_MCHK,
 						 mchk.cr14, mchk.mcic);
+		vcpu->stat.deliver_machine_check++;
 		rc = __write_machine_check(vcpu, &mchk);
 	}
 	return rc;
@@ -710,7 +713,7 @@ static int __must_check __deliver_prog(struct kvm_vcpu *vcpu)
 	ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK;
 	VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d",
 		   pgm_info.code, ilen);
-	vcpu->stat.deliver_program_int++;
+	vcpu->stat.deliver_program++;
 	trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
 					 pgm_info.code, 0);
 
@@ -899,7 +902,7 @@ static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu)
 		VCPU_EVENT(vcpu, 4,
 			   "deliver: virtio parm: 0x%x,parm64: 0x%llx",
 			   inti->ext.ext_params, inti->ext.ext_params2);
-		vcpu->stat.deliver_virtio_interrupt++;
+		vcpu->stat.deliver_virtio++;
 		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 				inti->type,
 				inti->ext.ext_params,
@@ -975,7 +978,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
 			inti->io.subchannel_id >> 1 & 0x3,
 			inti->io.subchannel_nr);
 
-		vcpu->stat.deliver_io_int++;
+		vcpu->stat.deliver_io++;
 		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 				inti->type,
 				((__u32)inti->io.subchannel_id << 16) |
@@ -1004,7 +1007,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
 		VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc);
 		memset(&io, 0, sizeof(io));
 		io.io_int_word = isc_to_int_word(isc);
-		vcpu->stat.deliver_io_int++;
+		vcpu->stat.deliver_io++;
 		trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id,
 			KVM_S390_INT_IO(1, 0, 0, 0),
 			((__u32)io.subchannel_id << 16) |
@@ -1268,6 +1271,7 @@ static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_program++;
 	VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
 				   irq->u.pgm.code, 0);
@@ -1309,6 +1313,7 @@ static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_pfault_init++;
 	VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx",
 		   irq->u.ext.ext_params2);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT,
@@ -1327,6 +1332,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 	struct kvm_s390_extcall_info *extcall = &li->irq.extcall;
 	uint16_t src_id = irq->u.extcall.code;
 
+	vcpu->stat.inject_external_call++;
 	VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u",
 		   src_id);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL,
@@ -1351,6 +1357,7 @@ static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 	struct kvm_s390_prefix_info *prefix = &li->irq.prefix;
 
+	vcpu->stat.inject_set_prefix++;
 	VCPU_EVENT(vcpu, 3, "inject: set prefix to %x",
 		   irq->u.prefix.address);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX,
@@ -1371,6 +1378,7 @@ static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 	struct kvm_s390_stop_info *stop = &li->irq.stop;
 	int rc = 0;
 
+	vcpu->stat.inject_stop_signal++;
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0);
 
 	if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS)
@@ -1395,6 +1403,7 @@ static int __inject_sigp_restart(struct kvm_vcpu *vcpu,
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_restart++;
 	VCPU_EVENT(vcpu, 3, "%s", "inject: restart int");
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0);
 
@@ -1407,6 +1416,7 @@ static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_emergency_signal++;
 	VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u",
 		   irq->u.emerg.code);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY,
@@ -1427,6 +1437,7 @@ static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 	struct kvm_s390_mchk_info *mchk = &li->irq.mchk;
 
+	vcpu->stat.inject_mchk++;
 	VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx",
 		   irq->u.mchk.mcic);
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0,
@@ -1457,6 +1468,7 @@ static int __inject_ckc(struct kvm_vcpu *vcpu)
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_ckc++;
 	VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external");
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP,
 				   0, 0);
@@ -1470,6 +1482,7 @@ static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
 {
 	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
 
+	vcpu->stat.inject_cputm++;
 	VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external");
 	trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER,
 				   0, 0);
@@ -1596,6 +1609,7 @@ static int __inject_service(struct kvm *kvm,
 {
 	struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
 
+	kvm->stat.inject_service_signal++;
 	spin_lock(&fi->lock);
 	fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING;
 	/*
@@ -1621,6 +1635,7 @@ static int __inject_virtio(struct kvm *kvm,
 {
 	struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
 
+	kvm->stat.inject_virtio++;
 	spin_lock(&fi->lock);
 	if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) {
 		spin_unlock(&fi->lock);
@@ -1638,6 +1653,7 @@ static int __inject_pfault_done(struct kvm *kvm,
 {
 	struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
 
+	kvm->stat.inject_pfault_done++;
 	spin_lock(&fi->lock);
 	if (fi->counters[FIRQ_CNTR_PFAULT] >=
 		(ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) {
@@ -1657,6 +1673,7 @@ static int __inject_float_mchk(struct kvm *kvm,
 {
 	struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
 
+	kvm->stat.inject_float_mchk++;
 	spin_lock(&fi->lock);
 	fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS);
 	fi->mchk.mcic |= inti->mchk.mcic;
@@ -1672,6 +1689,7 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
 	struct list_head *list;
 	int isc;
 
+	kvm->stat.inject_io++;
 	isc = int_word_to_isc(inti->io.io_int_word);
 
 	if (kvm->arch.gisa && inti->type & KVM_S390_INT_IO_AI_MASK) {

arch/s390/kvm/kvm-s390.c

@@ -57,6 +57,7 @@
 			   (KVM_MAX_VCPUS + LOCAL_IRQS))
 
 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
+#define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
 
 struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ "userspace_handled", VCPU_STAT(exit_userspace) },
@@ -64,6 +65,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ "exit_validity", VCPU_STAT(exit_validity) },
 	{ "exit_stop_request", VCPU_STAT(exit_stop_request) },
 	{ "exit_external_request", VCPU_STAT(exit_external_request) },
+	{ "exit_io_request", VCPU_STAT(exit_io_request) },
 	{ "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
 	{ "exit_instruction", VCPU_STAT(exit_instruction) },
 	{ "exit_pei", VCPU_STAT(exit_pei) },
@@ -78,15 +80,34 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
 	{ "instruction_lctl", VCPU_STAT(instruction_lctl) },
 	{ "instruction_stctl", VCPU_STAT(instruction_stctl) },
 	{ "instruction_stctg", VCPU_STAT(instruction_stctg) },
+	{ "deliver_ckc", VCPU_STAT(deliver_ckc) },
+	{ "deliver_cputm", VCPU_STAT(deliver_cputm) },
 	{ "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
 	{ "deliver_external_call", VCPU_STAT(deliver_external_call) },
 	{ "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
-	{ "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
+	{ "deliver_virtio", VCPU_STAT(deliver_virtio) },
 	{ "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
 	{ "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
 	{ "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
-	{ "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
+	{ "deliver_program", VCPU_STAT(deliver_program) },
+	{ "deliver_io", VCPU_STAT(deliver_io) },
+	{ "deliver_machine_check", VCPU_STAT(deliver_machine_check) },
 	{ "exit_wait_state", VCPU_STAT(exit_wait_state) },
+	{ "inject_ckc", VCPU_STAT(inject_ckc) },
+	{ "inject_cputm", VCPU_STAT(inject_cputm) },
+	{ "inject_external_call", VCPU_STAT(inject_external_call) },
+	{ "inject_float_mchk", VM_STAT(inject_float_mchk) },
+	{ "inject_emergency_signal", VCPU_STAT(inject_emergency_signal) },
+	{ "inject_io", VM_STAT(inject_io) },
+	{ "inject_mchk", VCPU_STAT(inject_mchk) },
+	{ "inject_pfault_done", VM_STAT(inject_pfault_done) },
+	{ "inject_program", VCPU_STAT(inject_program) },
+	{ "inject_restart", VCPU_STAT(inject_restart) },
+	{ "inject_service_signal", VM_STAT(inject_service_signal) },
+	{ "inject_set_prefix", VCPU_STAT(inject_set_prefix) },
+	{ "inject_stop_signal", VCPU_STAT(inject_stop_signal) },
+	{ "inject_pfault_init", VCPU_STAT(inject_pfault_init) },
+	{ "inject_virtio", VM_STAT(inject_virtio) },
 	{ "instruction_epsw", VCPU_STAT(instruction_epsw) },
 	{ "instruction_gs", VCPU_STAT(instruction_gs) },
 	{ "instruction_io_other", VCPU_STAT(instruction_io_other) },
@@ -151,13 +172,33 @@ static int nested;
 module_param(nested, int, S_IRUGO);
 MODULE_PARM_DESC(nested, "Nested virtualization support");
 
-/* upper facilities limit for kvm */
-unsigned long kvm_s390_fac_list_mask[16] = { FACILITIES_KVM };
 
-unsigned long kvm_s390_fac_list_mask_size(void)
+/*
+ * For now we handle at most 16 double words as this is what the s390 base
+ * kernel handles and stores in the prefix page. If we ever need to go beyond
+ * this, this requires changes to code, but the external uapi can stay.
+ */
+#define SIZE_INTERNAL 16
+
+/*
+ * Base feature mask that defines default mask for facilities. Consists of the
+ * defines in FACILITIES_KVM and the non-hypervisor managed bits.
+ */
+static unsigned long kvm_s390_fac_base[SIZE_INTERNAL] = { FACILITIES_KVM };
+/*
+ * Extended feature mask. Consists of the defines in FACILITIES_KVM_CPUMODEL
+ * and defines the facilities that can be enabled via a cpu model.
+ */
+static unsigned long kvm_s390_fac_ext[SIZE_INTERNAL] = { FACILITIES_KVM_CPUMODEL };
+
+static unsigned long kvm_s390_fac_size(void)
 {
-	BUILD_BUG_ON(ARRAY_SIZE(kvm_s390_fac_list_mask) > S390_ARCH_FAC_MASK_SIZE_U64);
-	return ARRAY_SIZE(kvm_s390_fac_list_mask);
+	BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_MASK_SIZE_U64);
+	BUILD_BUG_ON(SIZE_INTERNAL > S390_ARCH_FAC_LIST_SIZE_U64);
+	BUILD_BUG_ON(SIZE_INTERNAL * sizeof(unsigned long) >
+		sizeof(S390_lowcore.stfle_fac_list));
+
+	return SIZE_INTERNAL;
 }
 
 /* available cpu features supported by kvm */
@@ -678,6 +719,8 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
 		mutex_lock(&kvm->lock);
 		if (!kvm->created_vcpus) {
 			kvm->arch.use_cmma = 1;
+			/* Not compatible with cmma. */
+			kvm->arch.use_pfmfi = 0;
 			ret = 0;
 		}
 		mutex_unlock(&kvm->lock);
@@ -1582,7 +1625,7 @@ static int kvm_s390_get_cmma_bits(struct kvm *kvm,
 		return -EINVAL;
 	/* CMMA is disabled or was not used, or the buffer has length zero */
 	bufsize = min(args->count, KVM_S390_CMMA_SIZE_MAX);
-	if (!bufsize || !kvm->mm->context.use_cmma) {
+	if (!bufsize || !kvm->mm->context.uses_cmm) {
 		memset(args, 0, sizeof(*args));
 		return 0;
 	}
@@ -1659,7 +1702,7 @@ static int kvm_s390_get_cmma_bits(struct kvm *kvm,
 /*
  * This function sets the CMMA attributes for the given pages. If the input
  * buffer has zero length, no action is taken, otherwise the attributes are
- * set and the mm->context.use_cmma flag is set.
+ * set and the mm->context.uses_cmm flag is set.
  */
 static int kvm_s390_set_cmma_bits(struct kvm *kvm,
 				  const struct kvm_s390_cmma_log *args)
@@ -1709,9 +1752,9 @@ static int kvm_s390_set_cmma_bits(struct kvm *kvm,
 	srcu_read_unlock(&kvm->srcu, srcu_idx);
 	up_read(&kvm->mm->mmap_sem);
 
-	if (!kvm->mm->context.use_cmma) {
+	if (!kvm->mm->context.uses_cmm) {
 		down_write(&kvm->mm->mmap_sem);
-		kvm->mm->context.use_cmma = 1;
+		kvm->mm->context.uses_cmm = 1;
 		up_write(&kvm->mm->mmap_sem);
 	}
 out:
@@ -1966,20 +2009,15 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 	if (!kvm->arch.sie_page2)
 		goto out_err;
 
-	/* Populate the facility mask initially. */
-	memcpy(kvm->arch.model.fac_mask, S390_lowcore.stfle_fac_list,
-	       sizeof(S390_lowcore.stfle_fac_list));
-	for (i = 0; i < S390_ARCH_FAC_LIST_SIZE_U64; i++) {
-		if (i < kvm_s390_fac_list_mask_size())
-			kvm->arch.model.fac_mask[i] &= kvm_s390_fac_list_mask[i];
-		else
-			kvm->arch.model.fac_mask[i] = 0UL;
-	}
-
-	/* Populate the facility list initially. */
 	kvm->arch.model.fac_list = kvm->arch.sie_page2->fac_list;
-	memcpy(kvm->arch.model.fac_list, kvm->arch.model.fac_mask,
-	       S390_ARCH_FAC_LIST_SIZE_BYTE);
+
+	for (i = 0; i < kvm_s390_fac_size(); i++) {
+		kvm->arch.model.fac_mask[i] = S390_lowcore.stfle_fac_list[i] &
+					      (kvm_s390_fac_base[i] |
+					       kvm_s390_fac_ext[i]);
+		kvm->arch.model.fac_list[i] = S390_lowcore.stfle_fac_list[i] &
+					      kvm_s390_fac_base[i];
+	}
 
 	/* we are always in czam mode - even on pre z14 machines */
 	set_kvm_facility(kvm->arch.model.fac_mask, 138);
@@ -2027,6 +2065,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 
 	kvm->arch.css_support = 0;
 	kvm->arch.use_irqchip = 0;
+	kvm->arch.use_pfmfi = sclp.has_pfmfi;
 	kvm->arch.epoch = 0;
 
 	spin_lock_init(&kvm->arch.start_stop_lock);
@@ -2146,6 +2185,7 @@ static void sca_add_vcpu(struct kvm_vcpu *vcpu)
 		/* we still need the basic sca for the ipte control */
 		vcpu->arch.sie_block->scaoh = (__u32)(((__u64)sca) >> 32);
 		vcpu->arch.sie_block->scaol = (__u32)(__u64)sca;
+		return;
 	}
 	read_lock(&vcpu->kvm->arch.sca_lock);
 	if (vcpu->kvm->arch.use_esca) {
@@ -2452,8 +2492,6 @@ int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
 	vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
 	if (!vcpu->arch.sie_block->cbrlo)
 		return -ENOMEM;
-
-	vcpu->arch.sie_block->ecb2 &= ~ECB2_PFMFI;
 	return 0;
 }
 
@@ -2489,7 +2527,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
 	if (test_kvm_facility(vcpu->kvm, 73))
 		vcpu->arch.sie_block->ecb |= ECB_TE;
 
-	if (test_kvm_facility(vcpu->kvm, 8) && sclp.has_pfmfi)
+	if (test_kvm_facility(vcpu->kvm, 8) && vcpu->kvm->arch.use_pfmfi)
 		vcpu->arch.sie_block->ecb2 |= ECB2_PFMFI;
 	if (test_kvm_facility(vcpu->kvm, 130))
 		vcpu->arch.sie_block->ecb2 |= ECB2_IEP;
@@ -3021,7 +3059,7 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
 
 	if (kvm_check_request(KVM_REQ_START_MIGRATION, vcpu)) {
 		/*
-		 * Disable CMMA virtualization; we will emulate the ESSA
+		 * Disable CMM virtualization; we will emulate the ESSA
 		 * instruction manually, in order to provide additional
 		 * functionalities needed for live migration.
 		 */
@@ -3031,11 +3069,11 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
 
 	if (kvm_check_request(KVM_REQ_STOP_MIGRATION, vcpu)) {
 		/*
-		 * Re-enable CMMA virtualization if CMMA is available and
-		 * was used.
+		 * Re-enable CMM virtualization if CMMA is available and
+		 * CMM has been used.
 		 */
 		if ((vcpu->kvm->arch.use_cmma) &&
-		    (vcpu->kvm->mm->context.use_cmma))
+		    (vcpu->kvm->mm->context.uses_cmm))
 			vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
 		goto retry;
 	}
@@ -4042,7 +4080,7 @@ static int __init kvm_s390_init(void)
 	}
 
 	for (i = 0; i < 16; i++)
-		kvm_s390_fac_list_mask[i] |=
+		kvm_s390_fac_base[i] |=
 			S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);
 
 	return kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);

arch/s390/kvm/kvm-s390.h

@@ -294,8 +294,6 @@ void exit_sie(struct kvm_vcpu *vcpu);
 void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
 int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
 void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
-unsigned long kvm_s390_fac_list_mask_size(void);
-extern unsigned long kvm_s390_fac_list_mask[];
 void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
 __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
 

arch/s390/kvm/priv.c

@@ -1078,9 +1078,9 @@ static int handle_essa(struct kvm_vcpu *vcpu)
 		 * value really needs to be written to; if the value is
 		 * already correct, we do nothing and avoid the lock.
 		 */
-		if (vcpu->kvm->mm->context.use_cmma == 0) {
+		if (vcpu->kvm->mm->context.uses_cmm == 0) {
 			down_write(&vcpu->kvm->mm->mmap_sem);
-			vcpu->kvm->mm->context.use_cmma = 1;
+			vcpu->kvm->mm->context.uses_cmm = 1;
 			up_write(&vcpu->kvm->mm->mmap_sem);
 		}
 		/*

arch/s390/tools/gen_facilities.c

@@ -62,6 +62,13 @@ static struct facility_def facility_defs[] = {
 		}
 	},
 	{
+		/*
+		 * FACILITIES_KVM contains the list of facilities that are part
+		 * of the default facility mask and list that are passed to the
+		 * initial CPU model. If no CPU model is used, this, together
+		 * with the non-hypervisor managed bits, is the maximum list of
+		 * guest facilities supported by KVM.
+		 */
 		.name = "FACILITIES_KVM",
 		.bits = (int[]){
 			0,  /* N3 instructions */
@@ -89,6 +96,19 @@ static struct facility_def facility_defs[] = {
 			-1  /* END */
 		}
 	},
+	{
+		/*
+		 * FACILITIES_KVM_CPUMODEL contains the list of facilities
+		 * that can be enabled by CPU model code if the host supports
+		 * it. These facilities are not passed to the guest without
+		 * CPU model support.
+		 */
+
+		.name = "FACILITIES_KVM_CPUMODEL",
+		.bits = (int[]){
+			-1  /* END */
+		}
+	},
 };
 
 static void print_facility_list(struct facility_def *def)

drivers/s390/char/defkeymap.c

@@ -9,7 +9,9 @@
 #include <linux/kbd_kern.h>
 #include <linux/kbd_diacr.h>
 
-u_short plain_map[NR_KEYS] = {
+#include "keyboard.h"
+
+u_short ebc_plain_map[NR_KEYS] = {
 	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,
 	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,
 	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,	0xf000,
@@ -85,12 +87,12 @@ static u_short shift_ctrl_map[NR_KEYS] = {
 	0xf20a,	0xf108,	0xf200,	0xf200,	0xf200,	0xf200,	0xf200,	0xf200,
 };
 
-ushort *key_maps[MAX_NR_KEYMAPS] = {
-	plain_map, shift_map, NULL, NULL,
+ushort *ebc_key_maps[MAX_NR_KEYMAPS] = {
+	ebc_plain_map, shift_map, NULL, NULL,
 	ctrl_map, shift_ctrl_map, NULL,
 };
 
-unsigned int keymap_count = 4;
+unsigned int ebc_keymap_count = 4;
 
 
 /*
@@ -99,7 +101,7 @@ unsigned int keymap_count = 4;
  * the default and allocate dynamically in chunks of 512 bytes.
  */
 
-char func_buf[] = {
+char ebc_func_buf[] = {
 	'\033', '[', '[', 'A', 0, 
 	'\033', '[', '[', 'B', 0, 
 	'\033', '[', '[', 'C', 0, 
@@ -123,37 +125,37 @@ char func_buf[] = {
 };
 
 
-char *funcbufptr = func_buf;
-int funcbufsize = sizeof(func_buf);
-int funcbufleft = 0;          /* space left */
-
-char *func_table[MAX_NR_FUNC] = {
-	func_buf + 0,
-	func_buf + 5,
-	func_buf + 10,
-	func_buf + 15,
-	func_buf + 20,
-	func_buf + 25,
-	func_buf + 31,
-	func_buf + 37,
-	func_buf + 43,
-	func_buf + 49,
-	func_buf + 55,
-	func_buf + 61,
-	func_buf + 67,
-	func_buf + 73,
-	func_buf + 79,
-	func_buf + 85,
-	func_buf + 91,
-	func_buf + 97,
-	func_buf + 103,
-	func_buf + 109,
+char *ebc_funcbufptr = ebc_func_buf;
+int ebc_funcbufsize = sizeof(ebc_func_buf);
+int ebc_funcbufleft;		/* space left */
+
+char *ebc_func_table[MAX_NR_FUNC] = {
+	ebc_func_buf + 0,
+	ebc_func_buf + 5,
+	ebc_func_buf + 10,
+	ebc_func_buf + 15,
+	ebc_func_buf + 20,
+	ebc_func_buf + 25,
+	ebc_func_buf + 31,
+	ebc_func_buf + 37,
+	ebc_func_buf + 43,
+	ebc_func_buf + 49,
+	ebc_func_buf + 55,
+	ebc_func_buf + 61,
+	ebc_func_buf + 67,
+	ebc_func_buf + 73,
+	ebc_func_buf + 79,
+	ebc_func_buf + 85,
+	ebc_func_buf + 91,
+	ebc_func_buf + 97,
+	ebc_func_buf + 103,
+	ebc_func_buf + 109,
 	NULL,
 };
 
-struct kbdiacruc accent_table[MAX_DIACR] = {
+struct kbdiacruc ebc_accent_table[MAX_DIACR] = {
 	{'^', 'c', 0003},	{'^', 'd', 0004},
 	{'^', 'z', 0032},	{'^', 0012, 0000},
 };
 
-unsigned int accent_table_size = 4;
+unsigned int ebc_accent_table_size = 4;

drivers/s390/char/keyboard.c

@@ -54,24 +54,24 @@ kbd_alloc(void) {
 	kbd = kzalloc(sizeof(struct kbd_data), GFP_KERNEL);
 	if (!kbd)
 		goto out;
-	kbd->key_maps = kzalloc(sizeof(key_maps), GFP_KERNEL);
+	kbd->key_maps = kzalloc(sizeof(ebc_key_maps), GFP_KERNEL);
 	if (!kbd->key_maps)
 		goto out_kbd;
-	for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
-		if (key_maps[i]) {
-			kbd->key_maps[i] = kmemdup(key_maps[i],
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
+		if (ebc_key_maps[i]) {
+			kbd->key_maps[i] = kmemdup(ebc_key_maps[i],
 						   sizeof(u_short) * NR_KEYS,
 						   GFP_KERNEL);
 			if (!kbd->key_maps[i])
 				goto out_maps;
 		}
 	}
-	kbd->func_table = kzalloc(sizeof(func_table), GFP_KERNEL);
+	kbd->func_table = kzalloc(sizeof(ebc_func_table), GFP_KERNEL);
 	if (!kbd->func_table)
 		goto out_maps;
-	for (i = 0; i < ARRAY_SIZE(func_table); i++) {
-		if (func_table[i]) {
-			kbd->func_table[i] = kstrdup(func_table[i],
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++) {
+		if (ebc_func_table[i]) {
+			kbd->func_table[i] = kstrdup(ebc_func_table[i],
 						     GFP_KERNEL);
 			if (!kbd->func_table[i])
 				goto out_func;
@@ -81,22 +81,22 @@ kbd_alloc(void) {
 		kzalloc(sizeof(fn_handler_fn *) * NR_FN_HANDLER, GFP_KERNEL);
 	if (!kbd->fn_handler)
 		goto out_func;
-	kbd->accent_table = kmemdup(accent_table,
+	kbd->accent_table = kmemdup(ebc_accent_table,
 				    sizeof(struct kbdiacruc) * MAX_DIACR,
 				    GFP_KERNEL);
 	if (!kbd->accent_table)
 		goto out_fn_handler;
-	kbd->accent_table_size = accent_table_size;
+	kbd->accent_table_size = ebc_accent_table_size;
 	return kbd;
 
 out_fn_handler:
 	kfree(kbd->fn_handler);
 out_func:
-	for (i = 0; i < ARRAY_SIZE(func_table); i++)
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
 		kfree(kbd->func_table[i]);
 	kfree(kbd->func_table);
 out_maps:
-	for (i = 0; i < ARRAY_SIZE(key_maps); i++)
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
 		kfree(kbd->key_maps[i]);
 	kfree(kbd->key_maps);
 out_kbd:
@@ -112,10 +112,10 @@ kbd_free(struct kbd_data *kbd)
 
 	kfree(kbd->accent_table);
 	kfree(kbd->fn_handler);
-	for (i = 0; i < ARRAY_SIZE(func_table); i++)
+	for (i = 0; i < ARRAY_SIZE(ebc_func_table); i++)
 		kfree(kbd->func_table[i]);
 	kfree(kbd->func_table);
-	for (i = 0; i < ARRAY_SIZE(key_maps); i++)
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++)
 		kfree(kbd->key_maps[i]);
 	kfree(kbd->key_maps);
 	kfree(kbd);
@@ -131,7 +131,7 @@ kbd_ascebc(struct kbd_data *kbd, unsigned char *ascebc)
 	int i, j, k;
 
 	memset(ascebc, 0x40, 256);
-	for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
 		keymap = kbd->key_maps[i];
 		if (!keymap)
 			continue;
@@ -158,7 +158,7 @@ kbd_ebcasc(struct kbd_data *kbd, unsigned char *ebcasc)
 	int i, j, k;
 
 	memset(ebcasc, ' ', 256);
-	for (i = 0; i < ARRAY_SIZE(key_maps); i++) {
+	for (i = 0; i < ARRAY_SIZE(ebc_key_maps); i++) {
 		keymap = kbd->key_maps[i];
 		if (!keymap)
 			continue;

drivers/s390/char/keyboard.h

@@ -14,6 +14,17 @@
 
 struct kbd_data;
 
+extern int ebc_funcbufsize, ebc_funcbufleft;
+extern char *ebc_func_table[MAX_NR_FUNC];
+extern char ebc_func_buf[];
+extern char *ebc_funcbufptr;
+extern unsigned int ebc_keymap_count;
+
+extern struct kbdiacruc ebc_accent_table[];
+extern unsigned int ebc_accent_table_size;
+extern unsigned short *ebc_key_maps[MAX_NR_KEYMAPS];
+extern unsigned short ebc_plain_map[NR_KEYS];
+
 typedef void (fn_handler_fn)(struct kbd_data *);
 
 /*

drivers/tty/Kconfig

@@ -11,7 +11,7 @@ if TTY
 
 config VT
 	bool "Virtual terminal" if EXPERT
-	depends on !S390 && !UML
+	depends on !UML
 	select INPUT
 	default y
 	---help---

drivers/video/Kconfig

@@ -3,7 +3,8 @@
 #
 
 menu "Graphics support"
-	depends on HAS_IOMEM
+
+if HAS_IOMEM
 
 config HAVE_FB_ATMEL
 	bool
@@ -36,6 +37,8 @@ config VIDEOMODE_HELPERS
 config HDMI
 	bool
 
+endif # HAS_IOMEM
+
 if VT
 	source "drivers/video/console/Kconfig"
 endif

drivers/video/console/Kconfig

@@ -9,7 +9,7 @@ config VGA_CONSOLE
 	depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !FRV && \
 		!SUPERH && !BLACKFIN && !AVR32 && !MN10300 && !CRIS && \
 		(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) && \
-		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC
+		!ARM64 && !ARC && !MICROBLAZE && !OPENRISC && HAS_IOMEM && !S390
 	default y
 	help
 	  Saying Y here will allow you to use Linux in text mode through a
@@ -85,7 +85,7 @@ config MDA_CONSOLE
 
 config SGI_NEWPORT_CONSOLE
         tristate "SGI Newport Console support"
-        depends on SGI_IP22 
+        depends on SGI_IP22 && HAS_IOMEM
         select FONT_SUPPORT
         help
           Say Y here if you want the console on the Newport aka XL graphics
@@ -153,7 +153,7 @@ config FRAMEBUFFER_CONSOLE_ROTATION
 
 config STI_CONSOLE
         bool "STI text console"
-        depends on PARISC
+        depends on PARISC && HAS_IOMEM
         select FONT_SUPPORT
         default y
         help