Commit fe289ebb authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

Merge tag 'kvm-s390-next-5.5-1' of... 

Merge tag 'kvm-s390-next-5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD

KVM: s390: small fixes and enhancements

- selftest improvements
- yield improvements
- cleanups
parents 7ee30bc1 c7b7de63

arch/s390/include/asm/kvm_host.h

+1 −0
Original line number Diff line number Diff line
@@ -392,6 +392,7 @@ struct kvm_vcpu_stat { 
	u64 diagnose_10;

	u64 diagnose_44;

	u64 diagnose_9c;

	u64 diagnose_9c_ignored;

	u64 diagnose_258;

	u64 diagnose_308;

	u64 diagnose_500;

arch/s390/kvm/diag.c

+18 −4
Original line number Diff line number Diff line
@@ -158,14 +158,28 @@ static int __diag_time_slice_end_directed(struct kvm_vcpu *vcpu) 


	tid = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];

	vcpu->stat.diagnose_9c++;

	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d", tid);



	/* yield to self */

	if (tid == vcpu->vcpu_id)

		return 0;

		goto no_yield;



	/* yield to invalid */

	tcpu = kvm_get_vcpu_by_id(vcpu->kvm, tid);

	if (tcpu)

		kvm_vcpu_yield_to(tcpu);

	if (!tcpu)

		goto no_yield;



	/* target already running */

	if (READ_ONCE(tcpu->cpu) >= 0)

		goto no_yield;



	if (kvm_vcpu_yield_to(tcpu) <= 0)

		goto no_yield;



	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d: done", tid);

	return 0;

no_yield:

	VCPU_EVENT(vcpu, 5, "diag time slice end directed to %d: ignored", tid);

	vcpu->stat.diagnose_9c_ignored++;

	return 0;

}

arch/s390/kvm/interrupt.c

+2 −3
Original line number Diff line number Diff line
@@ -1477,8 +1477,7 @@ static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 
	return 0;

}



static int __inject_sigp_restart(struct kvm_vcpu *vcpu,

				 struct kvm_s390_irq *irq)

static int __inject_sigp_restart(struct kvm_vcpu *vcpu)

{

	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
@@ -2007,7 +2006,7 @@ static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) 
		rc = __inject_sigp_stop(vcpu, irq);

		break;

	case KVM_S390_RESTART:

		rc = __inject_sigp_restart(vcpu, irq);

		rc = __inject_sigp_restart(vcpu);

		break;

	case KVM_S390_INT_CLOCK_COMP:

		rc = __inject_ckc(vcpu);

arch/s390/kvm/kvm-s390.c

+8 −11
Original line number Diff line number Diff line
@@ -155,6 +155,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { 
	{ "instruction_diag_10", VCPU_STAT(diagnose_10) },

	{ "instruction_diag_44", VCPU_STAT(diagnose_44) },

	{ "instruction_diag_9c", VCPU_STAT(diagnose_9c) },

	{ "diag_9c_ignored", VCPU_STAT(diagnose_9c_ignored) },

	{ "instruction_diag_258", VCPU_STAT(diagnose_258) },

	{ "instruction_diag_308", VCPU_STAT(diagnose_308) },

	{ "instruction_diag_500", VCPU_STAT(diagnose_500) },
@@ -453,16 +454,14 @@ static void kvm_s390_cpu_feat_init(void) 


int kvm_arch_init(void *opaque)

{

	int rc;

	int rc = -ENOMEM;



	kvm_s390_dbf = debug_register("kvm-trace", 32, 1, 7 * sizeof(long));

	if (!kvm_s390_dbf)

		return -ENOMEM;



	if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view)) {

		rc = -ENOMEM;

		goto out_debug_unreg;

	}

	if (debug_register_view(kvm_s390_dbf, &debug_sprintf_view))

		goto out;



	kvm_s390_cpu_feat_init();
@@ -470,19 +469,17 @@ int kvm_arch_init(void *opaque) 
	rc = kvm_register_device_ops(&kvm_flic_ops, KVM_DEV_TYPE_FLIC);

	if (rc) {

		pr_err("A FLIC registration call failed with rc=%d\n", rc);

		goto out_debug_unreg;

		goto out;

	}



	rc = kvm_s390_gib_init(GAL_ISC);

	if (rc)

		goto out_gib_destroy;

		goto out;



	return 0;



out_gib_destroy:

	kvm_s390_gib_destroy();

out_debug_unreg:

	debug_unregister(kvm_s390_dbf);

out:

	kvm_arch_exit();

	return rc;

}

tools/testing/selftests/kvm/s390x/sync_regs_test.c

+9 −6
Original line number Diff line number Diff line
@@ -25,12 +25,15 @@ 


static void guest_code(void)

{

	register u64 stage asm("11") = 0;



	for (;;) {

		GUEST_SYNC(0);

		asm volatile ("ahi %0,1" : : "r"(stage));

	}

	/*

	 * We embed diag 501 here instead of doing a ucall to avoid that

	 * the compiler has messed with r11 at the time of the ucall.

	 */

	asm volatile (

		"0:	diag 0,0,0x501\n"

		"	ahi 11,1\n"

		"	j 0b\n"

	);

}



#define REG_COMPARE(reg) \

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