[linux-block.git] / arch / s390 / kvm / intercept.c

// SPDX-License-Identifier: GPL-2.0
/*
 * in-kernel handling for sie intercepts
 *
 * Copyright IBM Corp. 2008, 2020
 *
 *    Author(s): Carsten Otte <cotte@de.ibm.com>
 *               Christian Borntraeger <borntraeger@de.ibm.com>
 */

#include <linux/kvm_host.h>
#include <linux/errno.h>
#include <linux/pagemap.h>

#include <asm/asm-offsets.h>
#include <asm/irq.h>
#include <asm/sysinfo.h>
#include <asm/uv.h>

#include "kvm-s390.h"
#include "gaccess.h"
#include "trace.h"
#include "trace-s390.h"

u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
	u8 ilen = 0;

	switch (vcpu->arch.sie_block->icptcode) {
	case ICPT_INST:
	case ICPT_INSTPROGI:
	case ICPT_OPEREXC:
	case ICPT_PARTEXEC:
	case ICPT_IOINST:
		/* instruction only stored for these icptcodes */
		ilen = insn_length(vcpu->arch.sie_block->ipa >> 8);
		/* Use the length of the EXECUTE instruction if necessary */
		if (sie_block->icptstatus & 1) {
			ilen = (sie_block->icptstatus >> 4) & 0x6;
			if (!ilen)
				ilen = 4;
		}
		break;
	case ICPT_PROGI:
		/* bit 1+2 of pgmilc are the ilc, so we directly get ilen */
		ilen = vcpu->arch.sie_block->pgmilc & 0x6;
		break;
	}
	return ilen;
}

static int handle_stop(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
	int rc = 0;
	uint8_t flags, stop_pending;

	vcpu->stat.exit_stop_request++;

	/* delay the stop if any non-stop irq is pending */
	if (kvm_s390_vcpu_has_irq(vcpu, 1))
		return 0;

	/* avoid races with the injection/SIGP STOP code */
	spin_lock(&li->lock);
	flags = li->irq.stop.flags;
	stop_pending = kvm_s390_is_stop_irq_pending(vcpu);
	spin_unlock(&li->lock);

	trace_kvm_s390_stop_request(stop_pending, flags);
	if (!stop_pending)
		return 0;

	if (flags & KVM_S390_STOP_FLAG_STORE_STATUS) {
		rc = kvm_s390_vcpu_store_status(vcpu,
						KVM_S390_STORE_STATUS_NOADDR);
		if (rc)
			return rc;
	}

	/*
	 * no need to check the return value of vcpu_stop as it can only have
	 * an error for protvirt, but protvirt means user cpu state
	 */
	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
		kvm_s390_vcpu_stop(vcpu);
	return -EOPNOTSUPP;
}

static int handle_validity(struct kvm_vcpu *vcpu)
{
	int viwhy = vcpu->arch.sie_block->ipb >> 16;

	vcpu->stat.exit_validity++;
	trace_kvm_s390_intercept_validity(vcpu, viwhy);
	KVM_EVENT(3, "validity intercept 0x%x for pid %u (kvm 0x%pK)", viwhy,
		  current->pid, vcpu->kvm);

	/* do not warn on invalid runtime instrumentation mode */
	WARN_ONCE(viwhy != 0x44, "kvm: unhandled validity intercept 0x%x\n",
		  viwhy);
	return -EINVAL;
}

static int handle_instruction(struct kvm_vcpu *vcpu)
{
	vcpu->stat.exit_instruction++;
	trace_kvm_s390_intercept_instruction(vcpu,
					     vcpu->arch.sie_block->ipa,
					     vcpu->arch.sie_block->ipb);

	switch (vcpu->arch.sie_block->ipa >> 8) {
	case 0x01:
		return kvm_s390_handle_01(vcpu);
	case 0x82:
		return kvm_s390_handle_lpsw(vcpu);
	case 0x83:
		return kvm_s390_handle_diag(vcpu);
	case 0xaa:
		return kvm_s390_handle_aa(vcpu);
	case 0xae:
		return kvm_s390_handle_sigp(vcpu);
	case 0xb2:
		return kvm_s390_handle_b2(vcpu);
	case 0xb6:
		return kvm_s390_handle_stctl(vcpu);
	case 0xb7:
		return kvm_s390_handle_lctl(vcpu);
	case 0xb9:
		return kvm_s390_handle_b9(vcpu);
	case 0xe3:
		return kvm_s390_handle_e3(vcpu);
	case 0xe5:
		return kvm_s390_handle_e5(vcpu);
	case 0xeb:
		return kvm_s390_handle_eb(vcpu);
	default:
		return -EOPNOTSUPP;
	}
}

static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_pgm_info pgm_info = {
		.code = vcpu->arch.sie_block->iprcc,
		/* the PSW has already been rewound */
		.flags = KVM_S390_PGM_FLAGS_NO_REWIND,
	};

	switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
	case PGM_AFX_TRANSLATION:
	case PGM_ASX_TRANSLATION:
	case PGM_EX_TRANSLATION:
	case PGM_LFX_TRANSLATION:
	case PGM_LSTE_SEQUENCE:
	case PGM_LSX_TRANSLATION:
	case PGM_LX_TRANSLATION:
	case PGM_PRIMARY_AUTHORITY:
	case PGM_SECONDARY_AUTHORITY:
	case PGM_SPACE_SWITCH:
		pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
		break;
	case PGM_ALEN_TRANSLATION:
	case PGM_ALE_SEQUENCE:
	case PGM_ASTE_INSTANCE:
	case PGM_ASTE_SEQUENCE:
	case PGM_ASTE_VALIDITY:
	case PGM_EXTENDED_AUTHORITY:
		pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
		break;
	case PGM_ASCE_TYPE:
	case PGM_PAGE_TRANSLATION:
	case PGM_REGION_FIRST_TRANS:
	case PGM_REGION_SECOND_TRANS:
	case PGM_REGION_THIRD_TRANS:
	case PGM_SEGMENT_TRANSLATION:
		pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
		pgm_info.exc_access_id  = vcpu->arch.sie_block->eai;
		pgm_info.op_access_id  = vcpu->arch.sie_block->oai;
		break;
	case PGM_MONITOR:
		pgm_info.mon_class_nr = vcpu->arch.sie_block->mcn;
		pgm_info.mon_code = vcpu->arch.sie_block->tecmc;
		break;
	case PGM_VECTOR_PROCESSING:
	case PGM_DATA:
		pgm_info.data_exc_code = vcpu->arch.sie_block->dxc;
		break;
	case PGM_PROTECTION:
		pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
		pgm_info.exc_access_id  = vcpu->arch.sie_block->eai;
		break;
	default:
		break;
	}

	if (vcpu->arch.sie_block->iprcc & PGM_PER) {
		pgm_info.per_code = vcpu->arch.sie_block->perc;
		pgm_info.per_atmid = vcpu->arch.sie_block->peratmid;
		pgm_info.per_address = vcpu->arch.sie_block->peraddr;
		pgm_info.per_access_id = vcpu->arch.sie_block->peraid;
	}
	return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
}

/*
 * restore ITDB to program-interruption TDB in guest lowcore
 * and set TX abort indication if required
*/
static int handle_itdb(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_itdb *itdb;
	int rc;

	if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
		return 0;
	if (current->thread.per_flags & PER_FLAG_NO_TE)
		return 0;
	itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
	rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
	if (rc)
		return rc;
	memset(itdb, 0, sizeof(*itdb));

	return 0;
}

#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)

static int handle_prog(struct kvm_vcpu *vcpu)
{
	psw_t psw;
	int rc;

	vcpu->stat.exit_program_interruption++;

	/*
	 * Intercept 8 indicates a loop of specification exceptions
	 * for protected guests.
	 */
	if (kvm_s390_pv_cpu_is_protected(vcpu))
		return -EOPNOTSUPP;

	if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
		rc = kvm_s390_handle_per_event(vcpu);
		if (rc)
			return rc;
		/* the interrupt might have been filtered out completely */
		if (vcpu->arch.sie_block->iprcc == 0)
			return 0;
	}

	trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
	if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) {
		rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t));
		if (rc)
			return rc;
		/* Avoid endless loops of specification exceptions */
		if (!is_valid_psw(&psw))
			return -EOPNOTSUPP;
	}
	rc = handle_itdb(vcpu);
	if (rc)
		return rc;

	return inject_prog_on_prog_intercept(vcpu);
}

/**
 * handle_external_interrupt - used for external interruption interceptions
 * @vcpu: virtual cpu
 *
 * This interception only occurs if the CPUSTAT_EXT_INT bit was set, or if
 * the new PSW does not have external interrupts disabled. In the first case,
 * we've got to deliver the interrupt manually, and in the second case, we
 * drop to userspace to handle the situation there.
 */
static int handle_external_interrupt(struct kvm_vcpu *vcpu)
{
	u16 eic = vcpu->arch.sie_block->eic;
	struct kvm_s390_irq irq;
	psw_t newpsw;
	int rc;

	vcpu->stat.exit_external_interrupt++;

	rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t));
	if (rc)
		return rc;
	/* We can not handle clock comparator or timer interrupt with bad PSW */
	if ((eic == EXT_IRQ_CLK_COMP || eic == EXT_IRQ_CPU_TIMER) &&
	    (newpsw.mask & PSW_MASK_EXT))
		return -EOPNOTSUPP;

	switch (eic) {
	case EXT_IRQ_CLK_COMP:
		irq.type = KVM_S390_INT_CLOCK_COMP;
		break;
	case EXT_IRQ_CPU_TIMER:
		irq.type = KVM_S390_INT_CPU_TIMER;
		break;
	case EXT_IRQ_EXTERNAL_CALL:
		irq.type = KVM_S390_INT_EXTERNAL_CALL;
		irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr;
		rc = kvm_s390_inject_vcpu(vcpu, &irq);
		/* ignore if another external call is already pending */
		if (rc == -EBUSY)
			return 0;
		return rc;
	default:
		return -EOPNOTSUPP;
	}

	return kvm_s390_inject_vcpu(vcpu, &irq);
}

/**
 * handle_mvpg_pei - Handle MOVE PAGE partial execution interception.
 * @vcpu: virtual cpu
 *
 * This interception can only happen for guests with DAT disabled and
 * addresses that are currently not mapped in the host. Thus we try to
 * set up the mappings for the corresponding user pages here (or throw
 * addressing exceptions in case of illegal guest addresses).
 */
static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
{
	unsigned long srcaddr, dstaddr;
	int reg1, reg2, rc;

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);

	/* Ensure that the source is paged-in, no actual access -> no key checking */
	rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg2],
					      reg2, &srcaddr, GACC_FETCH, 0);
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
	rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0);
	if (rc != 0)
		return rc;

	/* Ensure that the source is paged-in, no actual access -> no key checking */
	rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg1],
					      reg1, &dstaddr, GACC_STORE, 0);
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
	rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1);
	if (rc != 0)
		return rc;

	kvm_s390_retry_instr(vcpu);

	return 0;
}

static int handle_partial_execution(struct kvm_vcpu *vcpu)
{
	vcpu->stat.exit_pei++;

	if (vcpu->arch.sie_block->ipa == 0xb254)	/* MVPG */
		return handle_mvpg_pei(vcpu);
	if (vcpu->arch.sie_block->ipa >> 8 == 0xae)	/* SIGP */
		return kvm_s390_handle_sigp_pei(vcpu);

	return -EOPNOTSUPP;
}

/*
 * Handle the sthyi instruction that provides the guest with system
 * information, like current CPU resources available at each level of
 * the machine.
 */
int handle_sthyi(struct kvm_vcpu *vcpu)
{
	int reg1, reg2, r = 0;
	u64 code, addr, cc = 0, rc = 0;
	struct sthyi_sctns *sctns = NULL;

	if (!test_kvm_facility(vcpu->kvm, 74))
		return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
	code = vcpu->run->s.regs.gprs[reg1];
	addr = vcpu->run->s.regs.gprs[reg2];

	vcpu->stat.instruction_sthyi++;
	VCPU_EVENT(vcpu, 3, "STHYI: fc: %llu addr: 0x%016llx", code, addr);
	trace_kvm_s390_handle_sthyi(vcpu, code, addr);

	if (reg1 == reg2 || reg1 & 1 || reg2 & 1)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

	if (code & 0xffff) {
		cc = 3;
		rc = 4;
		goto out;
	}

	if (!kvm_s390_pv_cpu_is_protected(vcpu) && (addr & ~PAGE_MASK))
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

	sctns = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT);
	if (!sctns)
		return -ENOMEM;

	cc = sthyi_fill(sctns, &rc);

out:
	if (!cc) {
		if (kvm_s390_pv_cpu_is_protected(vcpu)) {
			memcpy((void *)(sida_origin(vcpu->arch.sie_block)),
			       sctns, PAGE_SIZE);
		} else {
			r = write_guest(vcpu, addr, reg2, sctns, PAGE_SIZE);
			if (r) {
				free_page((unsigned long)sctns);
				return kvm_s390_inject_prog_cond(vcpu, r);
			}
		}
	}

	free_page((unsigned long)sctns);
	vcpu->run->s.regs.gprs[reg2 + 1] = rc;
	kvm_s390_set_psw_cc(vcpu, cc);
	return r;
}

static int handle_operexc(struct kvm_vcpu *vcpu)
{
	psw_t oldpsw, newpsw;
	int rc;

	vcpu->stat.exit_operation_exception++;
	trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa,
				      vcpu->arch.sie_block->ipb);

	if (vcpu->arch.sie_block->ipa == 0xb256)
		return handle_sthyi(vcpu);

	if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0)
		return -EOPNOTSUPP;
	rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &newpsw, sizeof(psw_t));
	if (rc)
		return rc;
	/*
	 * Avoid endless loops of operation exceptions, if the pgm new
	 * PSW will cause a new operation exception.
	 * The heuristic checks if the pgm new psw is within 6 bytes before
	 * the faulting psw address (with same DAT, AS settings) and the
	 * new psw is not a wait psw and the fault was not triggered by
	 * problem state.
	 */
	oldpsw = vcpu->arch.sie_block->gpsw;
	if (oldpsw.addr - newpsw.addr <= 6 &&
	    !(newpsw.mask & PSW_MASK_WAIT) &&
	    !(oldpsw.mask & PSW_MASK_PSTATE) &&
	    (newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) &&
	    (newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT))
		return -EOPNOTSUPP;

	return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
}

static int handle_pv_spx(struct kvm_vcpu *vcpu)
{
	u32 pref = *(u32 *)vcpu->arch.sie_block->sidad;

	kvm_s390_set_prefix(vcpu, pref);
	trace_kvm_s390_handle_prefix(vcpu, 1, pref);
	return 0;
}

static int handle_pv_sclp(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;

	spin_lock(&fi->lock);
	/*
	 * 2 cases:
	 * a: an sccb answering interrupt was already pending or in flight.
	 *    As the sccb value is not known we can simply set some value to
	 *    trigger delivery of a saved SCCB. UV will then use its saved
	 *    copy of the SCCB value.
	 * b: an error SCCB interrupt needs to be injected so we also inject
	 *    a fake SCCB address. Firmware will use the proper one.
	 * This makes sure, that both errors and real sccb returns will only
	 * be delivered after a notification intercept (instruction has
	 * finished) but not after others.
	 */
	fi->srv_signal.ext_params |= 0x43000;
	set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
	clear_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs);
	spin_unlock(&fi->lock);
	return 0;
}

static int handle_pv_uvc(struct kvm_vcpu *vcpu)
{
	struct uv_cb_share *guest_uvcb = (void *)vcpu->arch.sie_block->sidad;
	struct uv_cb_cts uvcb = {
		.header.cmd	= UVC_CMD_UNPIN_PAGE_SHARED,
		.header.len	= sizeof(uvcb),
		.guest_handle	= kvm_s390_pv_get_handle(vcpu->kvm),
		.gaddr		= guest_uvcb->paddr,
	};
	int rc;

	if (guest_uvcb->header.cmd != UVC_CMD_REMOVE_SHARED_ACCESS) {
		WARN_ONCE(1, "Unexpected notification intercept for UVC 0x%x\n",
			  guest_uvcb->header.cmd);
		return 0;
	}
	rc = gmap_make_secure(vcpu->arch.gmap, uvcb.gaddr, &uvcb);
	/*
	 * If the unpin did not succeed, the guest will exit again for the UVC
	 * and we will retry the unpin.
	 */
	if (rc == -EINVAL)
		return 0;
	/*
	 * If we got -EAGAIN here, we simply return it. It will eventually
	 * get propagated all the way to userspace, which should then try
	 * again.
	 */
	return rc;
}

static int handle_pv_notification(struct kvm_vcpu *vcpu)
{
	int ret;

	if (vcpu->arch.sie_block->ipa == 0xb210)
		return handle_pv_spx(vcpu);
	if (vcpu->arch.sie_block->ipa == 0xb220)
		return handle_pv_sclp(vcpu);
	if (vcpu->arch.sie_block->ipa == 0xb9a4)
		return handle_pv_uvc(vcpu);
	if (vcpu->arch.sie_block->ipa >> 8 == 0xae) {
		/*
		 * Besides external call, other SIGP orders also cause a
		 * 108 (pv notify) intercept. In contrast to external call,
		 * these orders need to be emulated and hence the appropriate
		 * place to handle them is in handle_instruction().
		 * So first try kvm_s390_handle_sigp_pei() and if that isn't
		 * successful, go on with handle_instruction().
		 */
		ret = kvm_s390_handle_sigp_pei(vcpu);
		if (!ret)
			return ret;
	}

	return handle_instruction(vcpu);
}

int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
{
	int rc, per_rc = 0;

	if (kvm_is_ucontrol(vcpu->kvm))
		return -EOPNOTSUPP;

	switch (vcpu->arch.sie_block->icptcode) {
	case ICPT_EXTREQ:
		vcpu->stat.exit_external_request++;
		return 0;
	case ICPT_IOREQ:
		vcpu->stat.exit_io_request++;
		return 0;
	case ICPT_INST:
		rc = handle_instruction(vcpu);
		break;
	case ICPT_PROGI:
		return handle_prog(vcpu);
	case ICPT_EXTINT:
		return handle_external_interrupt(vcpu);
	case ICPT_WAIT:
		return kvm_s390_handle_wait(vcpu);
	case ICPT_VALIDITY:
		return handle_validity(vcpu);
	case ICPT_STOP:
		return handle_stop(vcpu);
	case ICPT_OPEREXC:
		rc = handle_operexc(vcpu);
		break;
	case ICPT_PARTEXEC:
		rc = handle_partial_execution(vcpu);
		break;
	case ICPT_KSS:
		rc = kvm_s390_skey_check_enable(vcpu);
		break;
	case ICPT_MCHKREQ:
	case ICPT_INT_ENABLE:
		/*
		 * PSW bit 13 or a CR (0, 6, 14) changed and we might
		 * now be able to deliver interrupts. The pre-run code
		 * will take care of this.
		 */
		rc = 0;
		break;
	case ICPT_PV_INSTR:
		rc = handle_instruction(vcpu);
		break;
	case ICPT_PV_NOTIFY:
		rc = handle_pv_notification(vcpu);
		break;
	case ICPT_PV_PREF:
		rc = 0;
		gmap_convert_to_secure(vcpu->arch.gmap,
				       kvm_s390_get_prefix(vcpu));
		gmap_convert_to_secure(vcpu->arch.gmap,
				       kvm_s390_get_prefix(vcpu) + PAGE_SIZE);
		break;
	default:
		return -EOPNOTSUPP;
	}

	/* process PER, also if the instrution is processed in user space */
	if (vcpu->arch.sie_block->icptstatus & 0x02 &&
	    (!rc || rc == -EOPNOTSUPP))
		per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu);
	return per_rc ? per_rc : rc;
}
Commit	Line	Data
d809aa23	1	// SPDX-License-Identifier: GPL-2.0
8f2abe6a	2	/*
a53c8fab	3	* in-kernel handling for sie intercepts
8f2abe6a	4	*
49710db0	5	* Copyright IBM Corp. 2008, 2020
8f2abe6a	6	*
8f2abe6a CB	7	* Author(s): Carsten Otte <cotte@de.ibm.com>
	8	* Christian Borntraeger <borntraeger@de.ibm.com>
	9	*/
	10
	11	#include <linux/kvm_host.h>
	12	#include <linux/errno.h>
	13	#include <linux/pagemap.h>
	14
a86dcc24	15	#include <asm/asm-offsets.h>
f14d82e0	16	#include <asm/irq.h>
b7c92f1a	17	#include <asm/sysinfo.h>
53227810	18	#include <asm/uv.h>
8f2abe6a CB	19
8f2abe6a CB	20	#include "kvm-s390.h"
ba5c1e9b	21	#include "gaccess.h"
5786fffa	22	#include "trace.h"
ade38c31	23	#include "trace-s390.h"
ba5c1e9b	24
0e8bc06a	25	u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu)
04b41acd TH	26	{
04b41acd TH	27	struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
0e8bc06a	28	u8 ilen = 0;
04b41acd	29
0e8bc06a DH	30	switch (vcpu->arch.sie_block->icptcode) {
	31	case ICPT_INST:
	32	case ICPT_INSTPROGI:
	33	case ICPT_OPEREXC:
	34	case ICPT_PARTEXEC:
	35	case ICPT_IOINST:
	36	/* instruction only stored for these icptcodes */
	37	ilen = insn_length(vcpu->arch.sie_block->ipa >> 8);
	38	/* Use the length of the EXECUTE instruction if necessary */
	39	if (sie_block->icptstatus & 1) {
	40	ilen = (sie_block->icptstatus >> 4) & 0x6;
	41	if (!ilen)
	42	ilen = 4;
	43	}
	44	break;
	45	case ICPT_PROGI:
	46	/* bit 1+2 of pgmilc are the ilc, so we directly get ilen */
	47	ilen = vcpu->arch.sie_block->pgmilc & 0x6;
	48	break;
04b41acd	49	}
0e8bc06a	50	return ilen;
04b41acd TH	51	}
04b41acd TH	52
8f2abe6a CB	53	static int handle_stop(struct kvm_vcpu *vcpu)
8f2abe6a CB	54	{
6cddd432	55	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
9ace903d	56	int rc = 0;
6cddd432	57	uint8_t flags, stop_pending;
5288fbf0	58
8f2abe6a	59	vcpu->stat.exit_stop_request++;
ade38c31	60
9a022067 DH	61	/* delay the stop if any non-stop irq is pending */
	62	if (kvm_s390_vcpu_has_irq(vcpu, 1))
	63	return 0;
	64
6cddd432 DH	65	/* avoid races with the injection/SIGP STOP code */
	66	spin_lock(&li->lock);
	67	flags = li->irq.stop.flags;
	68	stop_pending = kvm_s390_is_stop_irq_pending(vcpu);
	69	spin_unlock(&li->lock);
32f5ff63	70
6cddd432 DH	71	trace_kvm_s390_stop_request(stop_pending, flags);
6cddd432 DH	72	if (!stop_pending)
32f5ff63	73	return 0;
9ace903d	74
6cddd432	75	if (flags & KVM_S390_STOP_FLAG_STORE_STATUS) {
9e0d5473 JF	76	rc = kvm_s390_vcpu_store_status(vcpu,
9e0d5473 JF	77	KVM_S390_STORE_STATUS_NOADDR);
32f5ff63 DH	78	if (rc)
	79	return rc;
	80	}
	81
fe28c786 JF	82	/*
	83	* no need to check the return value of vcpu_stop as it can only have
	84	* an error for protvirt, but protvirt means user cpu state
	85	*/
6352e4d2 DH	86	if (!kvm_s390_user_cpu_state_ctrl(vcpu->kvm))
6352e4d2 DH	87	kvm_s390_vcpu_stop(vcpu);
32f5ff63	88	return -EOPNOTSUPP;
8f2abe6a CB	89	}
	90
	91	static int handle_validity(struct kvm_vcpu *vcpu)
	92	{
	93	int viwhy = vcpu->arch.sie_block->ipb >> 16;
3edbcff9	94
8f2abe6a	95	vcpu->stat.exit_validity++;
5786fffa	96	trace_kvm_s390_intercept_validity(vcpu, viwhy);
a5efb6b6 CB	97	KVM_EVENT(3, "validity intercept 0x%x for pid %u (kvm 0x%pK)", viwhy,
	98	current->pid, vcpu->kvm);
	99
	100	/* do not warn on invalid runtime instrumentation mode */
	101	WARN_ONCE(viwhy != 0x44, "kvm: unhandled validity intercept 0x%x\n",
	102	viwhy);
	103	return -EINVAL;
8f2abe6a CB	104	}
8f2abe6a CB	105
ba5c1e9b CO	106	static int handle_instruction(struct kvm_vcpu *vcpu)
ba5c1e9b CO	107	{
ba5c1e9b	108	vcpu->stat.exit_instruction++;
5786fffa CH	109	trace_kvm_s390_intercept_instruction(vcpu,
	110	vcpu->arch.sie_block->ipa,
	111	vcpu->arch.sie_block->ipb);
cb7485da CB	112
	113	switch (vcpu->arch.sie_block->ipa >> 8) {
	114	case 0x01:
	115	return kvm_s390_handle_01(vcpu);
	116	case 0x82:
	117	return kvm_s390_handle_lpsw(vcpu);
	118	case 0x83:
	119	return kvm_s390_handle_diag(vcpu);
	120	case 0xaa:
	121	return kvm_s390_handle_aa(vcpu);
	122	case 0xae:
	123	return kvm_s390_handle_sigp(vcpu);
	124	case 0xb2:
	125	return kvm_s390_handle_b2(vcpu);
	126	case 0xb6:
	127	return kvm_s390_handle_stctl(vcpu);
	128	case 0xb7:
	129	return kvm_s390_handle_lctl(vcpu);
	130	case 0xb9:
	131	return kvm_s390_handle_b9(vcpu);
	132	case 0xe3:
	133	return kvm_s390_handle_e3(vcpu);
	134	case 0xe5:
	135	return kvm_s390_handle_e5(vcpu);
	136	case 0xeb:
	137	return kvm_s390_handle_eb(vcpu);
	138	default:
	139	return -EOPNOTSUPP;
	140	}
ba5c1e9b CO	141	}
ba5c1e9b CO	142
f6af84e7	143	static int inject_prog_on_prog_intercept(struct kvm_vcpu *vcpu)
439716a5	144	{
f6af84e7 DH	145	struct kvm_s390_pgm_info pgm_info = {
f6af84e7 DH	146	.code = vcpu->arch.sie_block->iprcc,
eaa4f416 DH	147	/* the PSW has already been rewound */
eaa4f416 DH	148	.flags = KVM_S390_PGM_FLAGS_NO_REWIND,
f6af84e7	149	};
439716a5 DH	150
	151	switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
	152	case PGM_AFX_TRANSLATION:
	153	case PGM_ASX_TRANSLATION:
	154	case PGM_EX_TRANSLATION:
	155	case PGM_LFX_TRANSLATION:
	156	case PGM_LSTE_SEQUENCE:
	157	case PGM_LSX_TRANSLATION:
	158	case PGM_LX_TRANSLATION:
	159	case PGM_PRIMARY_AUTHORITY:
	160	case PGM_SECONDARY_AUTHORITY:
	161	case PGM_SPACE_SWITCH:
f6af84e7	162	pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
439716a5 DH	163	break;
	164	case PGM_ALEN_TRANSLATION:
	165	case PGM_ALE_SEQUENCE:
	166	case PGM_ASTE_INSTANCE:
	167	case PGM_ASTE_SEQUENCE:
	168	case PGM_ASTE_VALIDITY:
	169	case PGM_EXTENDED_AUTHORITY:
f6af84e7	170	pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
439716a5 DH	171	break;
	172	case PGM_ASCE_TYPE:
	173	case PGM_PAGE_TRANSLATION:
	174	case PGM_REGION_FIRST_TRANS:
	175	case PGM_REGION_SECOND_TRANS:
	176	case PGM_REGION_THIRD_TRANS:
	177	case PGM_SEGMENT_TRANSLATION:
f6af84e7 DH	178	pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
	179	pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
	180	pgm_info.op_access_id = vcpu->arch.sie_block->oai;
439716a5 DH	181	break;
439716a5 DH	182	case PGM_MONITOR:
f6af84e7 DH	183	pgm_info.mon_class_nr = vcpu->arch.sie_block->mcn;
f6af84e7 DH	184	pgm_info.mon_code = vcpu->arch.sie_block->tecmc;
439716a5	185	break;
403c8648	186	case PGM_VECTOR_PROCESSING:
439716a5	187	case PGM_DATA:
f6af84e7	188	pgm_info.data_exc_code = vcpu->arch.sie_block->dxc;
439716a5 DH	189	break;
439716a5 DH	190	case PGM_PROTECTION:
f6af84e7 DH	191	pgm_info.trans_exc_code = vcpu->arch.sie_block->tecmc;
f6af84e7 DH	192	pgm_info.exc_access_id = vcpu->arch.sie_block->eai;
439716a5 DH	193	break;
	194	default:
	195	break;
	196	}
	197
	198	if (vcpu->arch.sie_block->iprcc & PGM_PER) {
f6af84e7 DH	199	pgm_info.per_code = vcpu->arch.sie_block->perc;
	200	pgm_info.per_atmid = vcpu->arch.sie_block->peratmid;
	201	pgm_info.per_address = vcpu->arch.sie_block->peraddr;
	202	pgm_info.per_access_id = vcpu->arch.sie_block->peraid;
439716a5	203	}
f6af84e7	204	return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
439716a5 DH	205	}
439716a5 DH	206
e325fe69 MM	207	/*
	208	* restore ITDB to program-interruption TDB in guest lowcore
	209	* and set TX abort indication if required
	210	*/
	211	static int handle_itdb(struct kvm_vcpu *vcpu)
	212	{
	213	struct kvm_s390_itdb *itdb;
	214	int rc;
	215
	216	if (!IS_TE_ENABLED(vcpu) \|\| !IS_ITDB_VALID(vcpu))
	217	return 0;
	218	if (current->thread.per_flags & PER_FLAG_NO_TE)
	219	return 0;
	220	itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
	221	rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
	222	if (rc)
	223	return rc;
	224	memset(itdb, 0, sizeof(*itdb));
	225
	226	return 0;
	227	}
	228
27291e21 DH	229	#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
27291e21 DH	230
ba5c1e9b CO	231	static int handle_prog(struct kvm_vcpu *vcpu)
ba5c1e9b CO	232	{
684135e0	233	psw_t psw;
0040e7d2 HC	234	int rc;
0040e7d2 HC	235
ba5c1e9b	236	vcpu->stat.exit_program_interruption++;
7feb6bb8	237
e663df91 JF	238	/*
	239	* Intercept 8 indicates a loop of specification exceptions
	240	* for protected guests.
	241	*/
	242	if (kvm_s390_pv_cpu_is_protected(vcpu))
	243	return -EOPNOTSUPP;
	244
27291e21	245	if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
a69cbe81 DH	246	rc = kvm_s390_handle_per_event(vcpu);
	247	if (rc)
	248	return rc;
27291e21 DH	249	/* the interrupt might have been filtered out completely */
	250	if (vcpu->arch.sie_block->iprcc == 0)
	251	return 0;
	252	}
	253
e325fe69	254	trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
684135e0 TH	255	if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) {
	256	rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t));
	257	if (rc)
	258	return rc;
	259	/* Avoid endless loops of specification exceptions */
	260	if (!is_valid_psw(&psw))
	261	return -EOPNOTSUPP;
	262	}
e325fe69	263	rc = handle_itdb(vcpu);
0040e7d2 HC	264	if (rc)
0040e7d2 HC	265	return rc;
439716a5	266
f6af84e7	267	return inject_prog_on_prog_intercept(vcpu);
ba5c1e9b CO	268	}
ba5c1e9b CO	269
f14d82e0 TH	270	/**
f14d82e0 TH	271	* handle_external_interrupt - used for external interruption interceptions
25b5476a	272	* @vcpu: virtual cpu
f14d82e0 TH	273	*
	274	* This interception only occurs if the CPUSTAT_EXT_INT bit was set, or if
	275	* the new PSW does not have external interrupts disabled. In the first case,
	276	* we've got to deliver the interrupt manually, and in the second case, we
	277	* drop to userspace to handle the situation there.
	278	*/
	279	static int handle_external_interrupt(struct kvm_vcpu *vcpu)
	280	{
	281	u16 eic = vcpu->arch.sie_block->eic;
383d0b05	282	struct kvm_s390_irq irq;
f14d82e0 TH	283	psw_t newpsw;
	284	int rc;
	285
	286	vcpu->stat.exit_external_interrupt++;
	287
	288	rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t));
	289	if (rc)
	290	return rc;
	291	/* We can not handle clock comparator or timer interrupt with bad PSW */
	292	if ((eic == EXT_IRQ_CLK_COMP \|\| eic == EXT_IRQ_CPU_TIMER) &&
	293	(newpsw.mask & PSW_MASK_EXT))
	294	return -EOPNOTSUPP;
	295
	296	switch (eic) {
	297	case EXT_IRQ_CLK_COMP:
	298	irq.type = KVM_S390_INT_CLOCK_COMP;
	299	break;
	300	case EXT_IRQ_CPU_TIMER:
	301	irq.type = KVM_S390_INT_CPU_TIMER;
	302	break;
	303	case EXT_IRQ_EXTERNAL_CALL:
	304	irq.type = KVM_S390_INT_EXTERNAL_CALL;
383d0b05	305	irq.u.extcall.code = vcpu->arch.sie_block->extcpuaddr;
ea5f4969 DH	306	rc = kvm_s390_inject_vcpu(vcpu, &irq);
	307	/* ignore if another external call is already pending */
	308	if (rc == -EBUSY)
	309	return 0;
	310	return rc;
f14d82e0 TH	311	default:
	312	return -EOPNOTSUPP;
	313	}
	314
	315	return kvm_s390_inject_vcpu(vcpu, &irq);
	316	}
	317
9a558ee3	318	/**
25b5476a JF	319	* handle_mvpg_pei - Handle MOVE PAGE partial execution interception.
25b5476a JF	320	* @vcpu: virtual cpu
9a558ee3 TH	321	*
	322	* This interception can only happen for guests with DAT disabled and
	323	* addresses that are currently not mapped in the host. Thus we try to
	324	* set up the mappings for the corresponding user pages here (or throw
	325	* addressing exceptions in case of illegal guest addresses).
	326	*/
	327	static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
	328	{
f22166dc	329	unsigned long srcaddr, dstaddr;
9a558ee3 TH	330	int reg1, reg2, rc;
	331
	332	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
9a558ee3	333
e613d834 JSG	334	/* Ensure that the source is paged-in, no actual access -> no key checking */
	335	rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg2],
	336	reg2, &srcaddr, GACC_FETCH, 0);
3cfad023 TH	337	if (rc)
3cfad023 TH	338	return kvm_s390_inject_prog_cond(vcpu, rc);
f22166dc TH	339	rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0);
f22166dc TH	340	if (rc != 0)
9a558ee3 TH	341	return rc;
9a558ee3 TH	342
e613d834 JSG	343	/* Ensure that the source is paged-in, no actual access -> no key checking */
	344	rc = guest_translate_address_with_key(vcpu, vcpu->run->s.regs.gprs[reg1],
	345	reg1, &dstaddr, GACC_STORE, 0);
3cfad023 TH	346	if (rc)
3cfad023 TH	347	return kvm_s390_inject_prog_cond(vcpu, rc);
f22166dc TH	348	rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1);
f22166dc TH	349	if (rc != 0)
9a558ee3 TH	350	return rc;
9a558ee3 TH	351
0e8bc06a	352	kvm_s390_retry_instr(vcpu);
9a558ee3 TH	353
	354	return 0;
	355	}
	356
	357	static int handle_partial_execution(struct kvm_vcpu *vcpu)
	358	{
9ec6de19 AY	359	vcpu->stat.exit_pei++;
9ec6de19 AY	360
9a558ee3 TH	361	if (vcpu->arch.sie_block->ipa == 0xb254) /* MVPG */
9a558ee3 TH	362	return handle_mvpg_pei(vcpu);
4953919f DH	363	if (vcpu->arch.sie_block->ipa >> 8 == 0xae) /* SIGP */
4953919f DH	364	return kvm_s390_handle_sigp_pei(vcpu);
9a558ee3 TH	365
	366	return -EOPNOTSUPP;
	367	}
	368
b7c92f1a QH	369	/*
	370	* Handle the sthyi instruction that provides the guest with system
	371	* information, like current CPU resources available at each level of
	372	* the machine.
	373	*/
	374	int handle_sthyi(struct kvm_vcpu *vcpu)
	375	{
	376	int reg1, reg2, r = 0;
	377	u64 code, addr, cc = 0, rc = 0;
	378	struct sthyi_sctns *sctns = NULL;
	379
	380	if (!test_kvm_facility(vcpu->kvm, 74))
	381	return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
	382
b7c92f1a QH	383	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
	384	code = vcpu->run->s.regs.gprs[reg1];
	385	addr = vcpu->run->s.regs.gprs[reg2];
	386
	387	vcpu->stat.instruction_sthyi++;
	388	VCPU_EVENT(vcpu, 3, "STHYI: fc: %llu addr: 0x%016llx", code, addr);
	389	trace_kvm_s390_handle_sthyi(vcpu, code, addr);
	390
	391	if (reg1 == reg2 \|\| reg1 & 1 \|\| reg2 & 1)
	392	return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
	393
	394	if (code & 0xffff) {
	395	cc = 3;
	396	rc = 4;
	397	goto out;
	398	}
	399
22d768c3	400	if (!kvm_s390_pv_cpu_is_protected(vcpu) && (addr & ~PAGE_MASK))
b7c92f1a QH	401	return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
b7c92f1a QH	402
c4196218	403	sctns = (void *)get_zeroed_page(GFP_KERNEL_ACCOUNT);
b7c92f1a QH	404	if (!sctns)
	405	return -ENOMEM;
	406
	407	cc = sthyi_fill(sctns, &rc);
	408
	409	out:
	410	if (!cc) {
22d768c3 JF	411	if (kvm_s390_pv_cpu_is_protected(vcpu)) {
	412	memcpy((void *)(sida_origin(vcpu->arch.sie_block)),
	413	sctns, PAGE_SIZE);
	414	} else {
	415	r = write_guest(vcpu, addr, reg2, sctns, PAGE_SIZE);
	416	if (r) {
	417	free_page((unsigned long)sctns);
	418	return kvm_s390_inject_prog_cond(vcpu, r);
	419	}
b7c92f1a QH	420	}
	421	}
	422
	423	free_page((unsigned long)sctns);
	424	vcpu->run->s.regs.gprs[reg2 + 1] = rc;
	425	kvm_s390_set_psw_cc(vcpu, cc);
	426	return r;
	427	}
	428
a011eeb2 JF	429	static int handle_operexc(struct kvm_vcpu *vcpu)
a011eeb2 JF	430	{
fb7dc1d4 CB	431	psw_t oldpsw, newpsw;
	432	int rc;
	433
a011eeb2 JF	434	vcpu->stat.exit_operation_exception++;
	435	trace_kvm_s390_handle_operexc(vcpu, vcpu->arch.sie_block->ipa,
	436	vcpu->arch.sie_block->ipb);
	437
c0a6bfdc	438	if (vcpu->arch.sie_block->ipa == 0xb256)
95ca2cb5 JF	439	return handle_sthyi(vcpu);
95ca2cb5 JF	440
6502a34c DH	441	if (vcpu->arch.sie_block->ipa == 0 && vcpu->kvm->arch.user_instr0)
6502a34c DH	442	return -EOPNOTSUPP;
fb7dc1d4 CB	443	rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &newpsw, sizeof(psw_t));
	444	if (rc)
	445	return rc;
	446	/*
	447	* Avoid endless loops of operation exceptions, if the pgm new
	448	* PSW will cause a new operation exception.
	449	* The heuristic checks if the pgm new psw is within 6 bytes before
	450	* the faulting psw address (with same DAT, AS settings) and the
	451	* new psw is not a wait psw and the fault was not triggered by
	452	* problem state.
	453	*/
	454	oldpsw = vcpu->arch.sie_block->gpsw;
	455	if (oldpsw.addr - newpsw.addr <= 6 &&
	456	!(newpsw.mask & PSW_MASK_WAIT) &&
	457	!(oldpsw.mask & PSW_MASK_PSTATE) &&
	458	(newpsw.mask & PSW_MASK_ASC) == (oldpsw.mask & PSW_MASK_ASC) &&
	459	(newpsw.mask & PSW_MASK_DAT) == (oldpsw.mask & PSW_MASK_DAT))
	460	return -EOPNOTSUPP;
6502a34c	461
a011eeb2 JF	462	return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
	463	}
	464
d274995e JF	465	static int handle_pv_spx(struct kvm_vcpu *vcpu)
	466	{
	467	u32 pref = (u32 )vcpu->arch.sie_block->sidad;
	468
	469	kvm_s390_set_prefix(vcpu, pref);
	470	trace_kvm_s390_handle_prefix(vcpu, 1, pref);
	471	return 0;
	472	}
	473
0890ddea CB	474	static int handle_pv_sclp(struct kvm_vcpu *vcpu)
	475	{
	476	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	477
	478	spin_lock(&fi->lock);
	479	/*
	480	* 2 cases:
	481	* a: an sccb answering interrupt was already pending or in flight.
	482	* As the sccb value is not known we can simply set some value to
	483	* trigger delivery of a saved SCCB. UV will then use its saved
	484	* copy of the SCCB value.
	485	* b: an error SCCB interrupt needs to be injected so we also inject
	486	* a fake SCCB address. Firmware will use the proper one.
	487	* This makes sure, that both errors and real sccb returns will only
	488	* be delivered after a notification intercept (instruction has
	489	* finished) but not after others.
	490	*/
	491	fi->srv_signal.ext_params \|= 0x43000;
	492	set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs);
	493	clear_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs);
	494	spin_unlock(&fi->lock);
	495	return 0;
	496	}
	497
53227810 CI	498	static int handle_pv_uvc(struct kvm_vcpu *vcpu)
	499	{
	500	struct uv_cb_share guest_uvcb = (void )vcpu->arch.sie_block->sidad;
	501	struct uv_cb_cts uvcb = {
	502	.header.cmd = UVC_CMD_UNPIN_PAGE_SHARED,
	503	.header.len = sizeof(uvcb),
	504	.guest_handle = kvm_s390_pv_get_handle(vcpu->kvm),
	505	.gaddr = guest_uvcb->paddr,
	506	};
	507	int rc;
	508
	509	if (guest_uvcb->header.cmd != UVC_CMD_REMOVE_SHARED_ACCESS) {
	510	WARN_ONCE(1, "Unexpected notification intercept for UVC 0x%x\n",
	511	guest_uvcb->header.cmd);
	512	return 0;
	513	}
	514	rc = gmap_make_secure(vcpu->arch.gmap, uvcb.gaddr, &uvcb);
	515	/*
	516	* If the unpin did not succeed, the guest will exit again for the UVC
	517	* and we will retry the unpin.
	518	*/
	519	if (rc == -EINVAL)
	520	return 0;
f0a1a061 CI	521	/*
	522	* If we got -EAGAIN here, we simply return it. It will eventually
	523	* get propagated all the way to userspace, which should then try
	524	* again.
	525	*/
53227810 CI	526	return rc;
	527	}
	528
da24a0cc JF	529	static int handle_pv_notification(struct kvm_vcpu *vcpu)
da24a0cc JF	530	{
c3f0e5fd NB	531	int ret;
c3f0e5fd NB	532
d274995e JF	533	if (vcpu->arch.sie_block->ipa == 0xb210)
d274995e JF	534	return handle_pv_spx(vcpu);
0890ddea CB	535	if (vcpu->arch.sie_block->ipa == 0xb220)
0890ddea CB	536	return handle_pv_sclp(vcpu);
53227810 CI	537	if (vcpu->arch.sie_block->ipa == 0xb9a4)
53227810 CI	538	return handle_pv_uvc(vcpu);
c3f0e5fd NB	539	if (vcpu->arch.sie_block->ipa >> 8 == 0xae) {
	540	/*
	541	* Besides external call, other SIGP orders also cause a
	542	* 108 (pv notify) intercept. In contrast to external call,
	543	* these orders need to be emulated and hence the appropriate
	544	* place to handle them is in handle_instruction().
	545	* So first try kvm_s390_handle_sigp_pei() and if that isn't
	546	* successful, go on with handle_instruction().
	547	*/
	548	ret = kvm_s390_handle_sigp_pei(vcpu);
	549	if (!ret)
	550	return ret;
	551	}
0890ddea	552
da24a0cc JF	553	return handle_instruction(vcpu);
	554	}
	555
8f2abe6a CB	556	int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
8f2abe6a CB	557	{
5ffe466c DH	558	int rc, per_rc = 0;
5ffe466c DH	559
71f116bf DH	560	if (kvm_is_ucontrol(vcpu->kvm))
	561	return -EOPNOTSUPP;
	562
46b708ea	563	switch (vcpu->arch.sie_block->icptcode) {
947b8972	564	case ICPT_EXTREQ:
a5e0acea CB	565	vcpu->stat.exit_external_request++;
a5e0acea CB	566	return 0;
947b8972	567	case ICPT_IOREQ:
a5e0acea CB	568	vcpu->stat.exit_io_request++;
a5e0acea CB	569	return 0;
947b8972	570	case ICPT_INST:
5ffe466c DH	571	rc = handle_instruction(vcpu);
5ffe466c DH	572	break;
947b8972	573	case ICPT_PROGI:
46b708ea	574	return handle_prog(vcpu);
947b8972	575	case ICPT_EXTINT:
46b708ea	576	return handle_external_interrupt(vcpu);
947b8972	577	case ICPT_WAIT:
46b708ea	578	return kvm_s390_handle_wait(vcpu);
947b8972	579	case ICPT_VALIDITY:
46b708ea	580	return handle_validity(vcpu);
947b8972	581	case ICPT_STOP:
46b708ea	582	return handle_stop(vcpu);
947b8972	583	case ICPT_OPEREXC:
5ffe466c DH	584	rc = handle_operexc(vcpu);
5ffe466c DH	585	break;
947b8972	586	case ICPT_PARTEXEC:
5ffe466c DH	587	rc = handle_partial_execution(vcpu);
5ffe466c DH	588	break;
730cd632 FA	589	case ICPT_KSS:
	590	rc = kvm_s390_skey_check_enable(vcpu);
	591	break;
49710db0 JF	592	case ICPT_MCHKREQ:
	593	case ICPT_INT_ENABLE:
	594	/*
	595	* PSW bit 13 or a CR (0, 6, 14) changed and we might
	596	* now be able to deliver interrupts. The pre-run code
	597	* will take care of this.
	598	*/
	599	rc = 0;
	600	break;
da24a0cc JF	601	case ICPT_PV_INSTR:
	602	rc = handle_instruction(vcpu);
	603	break;
	604	case ICPT_PV_NOTIFY:
	605	rc = handle_pv_notification(vcpu);
	606	break;
d274995e JF	607	case ICPT_PV_PREF:
	608	rc = 0;
	609	gmap_convert_to_secure(vcpu->arch.gmap,
	610	kvm_s390_get_prefix(vcpu));
	611	gmap_convert_to_secure(vcpu->arch.gmap,
	612	kvm_s390_get_prefix(vcpu) + PAGE_SIZE);
	613	break;
46b708ea	614	default:
b8e660b8	615	return -EOPNOTSUPP;
46b708ea	616	}
5ffe466c DH	617
	618	/* process PER, also if the instrution is processed in user space */
	619	if (vcpu->arch.sie_block->icptstatus & 0x02 &&
	620	(!rc \|\| rc == -EOPNOTSUPP))
	621	per_rc = kvm_s390_handle_per_ifetch_icpt(vcpu);
	622	return per_rc ? per_rc : rc;
8f2abe6a	623	}