priv.c 32.4 KB
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/*
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 * handling privileged instructions
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 *
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 * Copyright IBM Corp. 2008, 2013
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (version 2 only)
 * as published by the Free Software Foundation.
 *
 *    Author(s): Carsten Otte <cotte@de.ibm.com>
 *               Christian Borntraeger <borntraeger@de.ibm.com>
 */

#include <linux/kvm.h>
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#include <linux/gfp.h>
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#include <linux/errno.h>
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#include <linux/compat.h>
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#include <asm/asm-offsets.h>
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#include <asm/facility.h>
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#include <asm/current.h>
#include <asm/debug.h>
#include <asm/ebcdic.h>
#include <asm/sysinfo.h>
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#include <asm/pgtable.h>
#include <asm/pgalloc.h>
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#include <asm/gmap.h>
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#include <asm/io.h>
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#include <asm/ptrace.h>
#include <asm/compat.h>
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#include <asm/sclp.h>
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#include "gaccess.h"
#include "kvm-s390.h"
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#include "trace.h"
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static int handle_ri(struct kvm_vcpu *vcpu)
{
	if (test_kvm_facility(vcpu->kvm, 64)) {
		vcpu->arch.sie_block->ecb3 |= 0x01;
		kvm_s390_retry_instr(vcpu);
		return 0;
	} else
		return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
}

int kvm_s390_handle_aa(struct kvm_vcpu *vcpu)
{
	if ((vcpu->arch.sie_block->ipa & 0xf) <= 4)
		return handle_ri(vcpu);
	else
		return -EOPNOTSUPP;
}

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/* Handle SCK (SET CLOCK) interception */
static int handle_set_clock(struct kvm_vcpu *vcpu)
{
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	int rc;
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	ar_t ar;
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	u64 op2, val;
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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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	if (op2 & 7)	/* Operand must be on a doubleword boundary */
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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	rc = read_guest(vcpu, op2, ar, &val, sizeof(val));
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	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
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	VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", val);
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	kvm_s390_set_tod_clock(vcpu->kvm, val);
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	kvm_s390_set_psw_cc(vcpu, 0);
	return 0;
}

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static int handle_set_prefix(struct kvm_vcpu *vcpu)
{
	u64 operand2;
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	u32 address;
	int rc;
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	ar_t ar;
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	vcpu->stat.instruction_spx++;

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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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	/* must be word boundary */
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	if (operand2 & 3)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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	/* get the value */
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	rc = read_guest(vcpu, operand2, ar, &address, sizeof(address));
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	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);

	address &= 0x7fffe000u;

	/*
	 * Make sure the new value is valid memory. We only need to check the
	 * first page, since address is 8k aligned and memory pieces are always
	 * at least 1MB aligned and have at least a size of 1MB.
	 */
	if (kvm_is_error_gpa(vcpu->kvm, address))
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		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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	kvm_s390_set_prefix(vcpu, address);
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	trace_kvm_s390_handle_prefix(vcpu, 1, address);
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	return 0;
}

static int handle_store_prefix(struct kvm_vcpu *vcpu)
{
	u64 operand2;
	u32 address;
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	int rc;
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	ar_t ar;
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	vcpu->stat.instruction_stpx++;
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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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	/* must be word boundary */
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	if (operand2 & 3)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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	address = kvm_s390_get_prefix(vcpu);
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	/* get the value */
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	rc = write_guest(vcpu, operand2, ar, &address, sizeof(address));
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	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
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	VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2);
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	trace_kvm_s390_handle_prefix(vcpu, 0, address);
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	return 0;
}

static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
{
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	u16 vcpu_id = vcpu->vcpu_id;
	u64 ga;
	int rc;
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	ar_t ar;
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	vcpu->stat.instruction_stap++;
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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	ga = kvm_s390_get_base_disp_s(vcpu, &ar);
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	if (ga & 1)
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		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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	rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id));
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	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
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	VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga);
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	trace_kvm_s390_handle_stap(vcpu, ga);
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	return 0;
}

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static int __skey_check_enable(struct kvm_vcpu *vcpu)
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{
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	int rc = 0;
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	trace_kvm_s390_skey_related_inst(vcpu);
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	if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
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		return rc;
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	rc = s390_enable_skey();
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	VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
	if (!rc)
		vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
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	return rc;
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}

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static int try_handle_skey(struct kvm_vcpu *vcpu)
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{
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	int rc;
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	vcpu->stat.instruction_storage_key++;
	rc = __skey_check_enable(vcpu);
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	if (rc)
		return rc;
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	if (sclp.has_skey) {
		/* with storage-key facility, SIE interprets it for us */
		kvm_s390_retry_instr(vcpu);
		VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
		return -EAGAIN;
	}
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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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	return 0;
}
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static int handle_iske(struct kvm_vcpu *vcpu)
{
	unsigned long addr;
	unsigned char key;
	int reg1, reg2;
	int rc;

	rc = try_handle_skey(vcpu);
	if (rc)
		return rc != -EAGAIN ? rc : 0;

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);

	addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
	addr = kvm_s390_logical_to_effective(vcpu, addr);
	addr = kvm_s390_real_to_abs(vcpu, addr);
	addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
	if (kvm_is_error_hva(addr))
		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

	down_read(&current->mm->mmap_sem);
	rc = get_guest_storage_key(current->mm, addr, &key);
	up_read(&current->mm->mmap_sem);
	if (rc)
		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
	vcpu->run->s.regs.gprs[reg1] &= ~0xff;
	vcpu->run->s.regs.gprs[reg1] |= key;
	return 0;
}

static int handle_rrbe(struct kvm_vcpu *vcpu)
{
	unsigned long addr;
	int reg1, reg2;
	int rc;

	rc = try_handle_skey(vcpu);
	if (rc)
		return rc != -EAGAIN ? rc : 0;

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);

	addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
	addr = kvm_s390_logical_to_effective(vcpu, addr);
	addr = kvm_s390_real_to_abs(vcpu, addr);
	addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
	if (kvm_is_error_hva(addr))
		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

	down_read(&current->mm->mmap_sem);
	rc = reset_guest_reference_bit(current->mm, addr);
	up_read(&current->mm->mmap_sem);
	if (rc < 0)
		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

	kvm_s390_set_psw_cc(vcpu, rc);
	return 0;
}

#define SSKE_NQ 0x8
#define SSKE_MR 0x4
#define SSKE_MC 0x2
#define SSKE_MB 0x1
static int handle_sske(struct kvm_vcpu *vcpu)
{
	unsigned char m3 = vcpu->arch.sie_block->ipb >> 28;
	unsigned long start, end;
	unsigned char key, oldkey;
	int reg1, reg2;
	int rc;

	rc = try_handle_skey(vcpu);
	if (rc)
		return rc != -EAGAIN ? rc : 0;

	if (!test_kvm_facility(vcpu->kvm, 8))
		m3 &= ~SSKE_MB;
	if (!test_kvm_facility(vcpu->kvm, 10))
		m3 &= ~(SSKE_MC | SSKE_MR);
	if (!test_kvm_facility(vcpu->kvm, 14))
		m3 &= ~SSKE_NQ;

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);

	key = vcpu->run->s.regs.gprs[reg1] & 0xfe;
	start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
	start = kvm_s390_logical_to_effective(vcpu, start);
	if (m3 & SSKE_MB) {
		/* start already designates an absolute address */
		end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
	} else {
		start = kvm_s390_real_to_abs(vcpu, start);
		end = start + PAGE_SIZE;
	}

	while (start != end) {
		unsigned long addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));

		if (kvm_is_error_hva(addr))
			return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

		down_read(&current->mm->mmap_sem);
		rc = cond_set_guest_storage_key(current->mm, addr, key, &oldkey,
						m3 & SSKE_NQ, m3 & SSKE_MR,
						m3 & SSKE_MC);
		up_read(&current->mm->mmap_sem);
		if (rc < 0)
			return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
		start += PAGE_SIZE;
	};

	if (m3 & (SSKE_MC | SSKE_MR)) {
		if (m3 & SSKE_MB) {
			/* skey in reg1 is unpredictable */
			kvm_s390_set_psw_cc(vcpu, 3);
		} else {
			kvm_s390_set_psw_cc(vcpu, rc);
			vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL;
			vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8;
		}
	}
	if (m3 & SSKE_MB) {
		if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT)
			vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK;
		else
			vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL;
		end = kvm_s390_logical_to_effective(vcpu, end);
		vcpu->run->s.regs.gprs[reg2] |= end;
	}
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	return 0;
}

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static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
{
	vcpu->stat.instruction_ipte_interlock++;
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	if (psw_bits(vcpu->arch.sie_block->gpsw).p)
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		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
	wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
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	kvm_s390_retry_instr(vcpu);
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	VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
	return 0;
}

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static int handle_test_block(struct kvm_vcpu *vcpu)
{
	gpa_t addr;
	int reg2;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

	kvm_s390_get_regs_rre(vcpu, NULL, &reg2);
	addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
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	addr = kvm_s390_logical_to_effective(vcpu, addr);
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	if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
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		return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
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	addr = kvm_s390_real_to_abs(vcpu, addr);

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	if (kvm_is_error_gpa(vcpu->kvm, addr))
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		return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
	/*
	 * We don't expect errors on modern systems, and do not care
	 * about storage keys (yet), so let's just clear the page.
	 */
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	if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
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		return -EFAULT;
	kvm_s390_set_psw_cc(vcpu, 0);
	vcpu->run->s.regs.gprs[0] = 0;
	return 0;
}

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static int handle_tpi(struct kvm_vcpu *vcpu)
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{
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	struct kvm_s390_interrupt_info *inti;
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	unsigned long len;
	u32 tpi_data[3];
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	int rc;
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	u64 addr;
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	ar_t ar;
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	addr = kvm_s390_get_base_disp_s(vcpu, &ar);
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	if (addr & 3)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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	inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
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	if (!inti) {
		kvm_s390_set_psw_cc(vcpu, 0);
		return 0;
	}

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	tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
	tpi_data[1] = inti->io.io_int_parm;
	tpi_data[2] = inti->io.io_int_word;
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	if (addr) {
		/*
		 * Store the two-word I/O interruption code into the
		 * provided area.
		 */
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		len = sizeof(tpi_data) - 4;
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		rc = write_guest(vcpu, addr, ar, &tpi_data, len);
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		if (rc) {
			rc = kvm_s390_inject_prog_cond(vcpu, rc);
			goto reinject_interrupt;
		}
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	} else {
		/*
		 * Store the three-word I/O interruption code into
		 * the appropriate lowcore area.
		 */
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		len = sizeof(tpi_data);
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		if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
			/* failed writes to the low core are not recoverable */
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			rc = -EFAULT;
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			goto reinject_interrupt;
		}
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	}
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	/* irq was successfully handed to the guest */
	kfree(inti);
	kvm_s390_set_psw_cc(vcpu, 1);
	return 0;
reinject_interrupt:
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	/*
	 * If we encounter a problem storing the interruption code, the
	 * instruction is suppressed from the guest's view: reinject the
	 * interrupt.
	 */
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	if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
		kfree(inti);
		rc = -EFAULT;
	}
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	/* don't set the cc, a pgm irq was injected or we drop to user space */
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	return rc ? -EFAULT : 0;
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}

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static int handle_tsch(struct kvm_vcpu *vcpu)
{
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	struct kvm_s390_interrupt_info *inti = NULL;
	const u64 isc_mask = 0xffUL << 24; /* all iscs set */
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	/* a valid schid has at least one bit set */
	if (vcpu->run->s.regs.gprs[1])
		inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
					   vcpu->run->s.regs.gprs[1]);
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	/*
	 * Prepare exit to userspace.
	 * We indicate whether we dequeued a pending I/O interrupt
	 * so that userspace can re-inject it if the instruction gets
	 * a program check. While this may re-order the pending I/O
	 * interrupts, this is no problem since the priority is kept
	 * intact.
	 */
	vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
	vcpu->run->s390_tsch.dequeued = !!inti;
	if (inti) {
		vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
		vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
		vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
		vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
	}
	vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
	kfree(inti);
	return -EREMOTE;
}

static int handle_io_inst(struct kvm_vcpu *vcpu)
{
	VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");

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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	if (vcpu->kvm->arch.css_support) {
		/*
		 * Most I/O instructions will be handled by userspace.
		 * Exceptions are tpi and the interrupt portion of tsch.
		 */
		if (vcpu->arch.sie_block->ipa == 0xb236)
			return handle_tpi(vcpu);
		if (vcpu->arch.sie_block->ipa == 0xb235)
			return handle_tsch(vcpu);
		/* Handle in userspace. */
		return -EOPNOTSUPP;
	} else {
		/*
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		 * Set condition code 3 to stop the guest from issuing channel
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		 * I/O instructions.
		 */
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		kvm_s390_set_psw_cc(vcpu, 3);
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		return 0;
	}
}

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static int handle_stfl(struct kvm_vcpu *vcpu)
{
	int rc;
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	unsigned int fac;
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	vcpu->stat.instruction_stfl++;
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	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

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	/*
	 * We need to shift the lower 32 facility bits (bit 0-31) from a u64
	 * into a u32 memory representation. They will remain bits 0-31.
	 */
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	fac = *vcpu->kvm->arch.model.fac_list >> 32;
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	rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
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			    &fac, sizeof(fac));
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	if (rc)
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		return rc;
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	VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
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	trace_kvm_s390_handle_stfl(vcpu, fac);
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	return 0;
}

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#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
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#define PSW_ADDR_24 0x0000000000ffffffUL
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#define PSW_ADDR_31 0x000000007fffffffUL

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int is_valid_psw(psw_t *psw)
{
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	if (psw->mask & PSW_MASK_UNASSIGNED)
		return 0;
	if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
		if (psw->addr & ~PSW_ADDR_31)
			return 0;
	}
	if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
		return 0;
	if ((psw->mask & PSW_MASK_ADDR_MODE) ==  PSW_MASK_EA)
		return 0;
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	if (psw->addr & 1)
		return 0;
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	return 1;
}

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int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
{
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	psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
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	psw_compat_t new_psw;
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	u64 addr;
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	int rc;
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	ar_t ar;
552

553
	if (gpsw->mask & PSW_MASK_PSTATE)
554 555
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

556
	addr = kvm_s390_get_base_disp_s(vcpu, &ar);
557 558
	if (addr & 7)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
559

560
	rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
561 562
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
563 564
	if (!(new_psw.mask & PSW32_MASK_BASE))
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
565 566 567 568
	gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
	gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
	gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
	if (!is_valid_psw(gpsw))
569
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
570 571 572 573 574 575
	return 0;
}

static int handle_lpswe(struct kvm_vcpu *vcpu)
{
	psw_t new_psw;
576
	u64 addr;
577
	int rc;
578
	ar_t ar;
579

580 581 582
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

583
	addr = kvm_s390_get_base_disp_s(vcpu, &ar);
584 585
	if (addr & 7)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
586
	rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
587 588
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
589 590
	vcpu->arch.sie_block->gpsw = new_psw;
	if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
591
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
592 593 594
	return 0;
}

595 596
static int handle_stidp(struct kvm_vcpu *vcpu)
{
597
	u64 stidp_data = vcpu->kvm->arch.model.cpuid;
598
	u64 operand2;
599
	int rc;
600
	ar_t ar;
601 602

	vcpu->stat.instruction_stidp++;
603

604 605 606
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

607
	operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
608

609 610
	if (operand2 & 7)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
611

612
	rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
613 614
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
615

616
	VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
617 618 619 620 621 622 623 624
	return 0;
}

static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
{
	int cpus = 0;
	int n;

625
	cpus = atomic_read(&vcpu->kvm->online_vcpus);
626 627

	/* deal with other level 3 hypervisors */
628
	if (stsi(mem, 3, 2, 2))
629 630 631 632 633 634
		mem->count = 0;
	if (mem->count < 8)
		mem->count++;
	for (n = mem->count - 1; n > 0 ; n--)
		memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));

635
	memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
636 637 638 639 640 641 642 643 644 645 646
	mem->vm[0].cpus_total = cpus;
	mem->vm[0].cpus_configured = cpus;
	mem->vm[0].cpus_standby = 0;
	mem->vm[0].cpus_reserved = 0;
	mem->vm[0].caf = 1000;
	memcpy(mem->vm[0].name, "KVMguest", 8);
	ASCEBC(mem->vm[0].name, 8);
	memcpy(mem->vm[0].cpi, "KVM/Linux       ", 16);
	ASCEBC(mem->vm[0].cpi, 16);
}

647 648 649 650 651 652 653 654 655 656 657
static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, ar_t ar,
				 u8 fc, u8 sel1, u16 sel2)
{
	vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
	vcpu->run->s390_stsi.addr = addr;
	vcpu->run->s390_stsi.ar = ar;
	vcpu->run->s390_stsi.fc = fc;
	vcpu->run->s390_stsi.sel1 = sel1;
	vcpu->run->s390_stsi.sel2 = sel2;
}

658 659
static int handle_stsi(struct kvm_vcpu *vcpu)
{
660 661 662
	int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
	int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
	int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
663
	unsigned long mem = 0;
664
	u64 operand2;
665
	int rc = 0;
666
	ar_t ar;
667 668

	vcpu->stat.instruction_stsi++;
669
	VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
670

671 672 673
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

674
	if (fc > 3) {
675
		kvm_s390_set_psw_cc(vcpu, 3);
676 677
		return 0;
	}
678

679 680
	if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
	    || vcpu->run->s.regs.gprs[1] & 0xffff0000)
681 682
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

683
	if (fc == 0) {
684
		vcpu->run->s.regs.gprs[0] = 3 << 28;
685
		kvm_s390_set_psw_cc(vcpu, 0);
686
		return 0;
687 688
	}

689
	operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
690 691 692 693 694

	if (operand2 & 0xfff)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

	switch (fc) {
695 696 697 698
	case 1: /* same handling for 1 and 2 */
	case 2:
		mem = get_zeroed_page(GFP_KERNEL);
		if (!mem)
699
			goto out_no_data;
700
		if (stsi((void *) mem, fc, sel1, sel2))
701
			goto out_no_data;
702 703 704
		break;
	case 3:
		if (sel1 != 2 || sel2 != 2)
705
			goto out_no_data;
706 707
		mem = get_zeroed_page(GFP_KERNEL);
		if (!mem)
708
			goto out_no_data;
709 710 711 712
		handle_stsi_3_2_2(vcpu, (void *) mem);
		break;
	}

713
	rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
714 715 716
	if (rc) {
		rc = kvm_s390_inject_prog_cond(vcpu, rc);
		goto out;
717
	}
718 719 720 721
	if (vcpu->kvm->arch.user_stsi) {
		insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
		rc = -EREMOTE;
	}
722
	trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
723
	free_page(mem);
724
	kvm_s390_set_psw_cc(vcpu, 0);
725
	vcpu->run->s.regs.gprs[0] = 0;
726
	return rc;
727
out_no_data:
728
	kvm_s390_set_psw_cc(vcpu, 3);
729
out:
730
	free_page(mem);
731
	return rc;
732 733
}

734
static const intercept_handler_t b2_handlers[256] = {
735
	[0x02] = handle_stidp,
736
	[0x04] = handle_set_clock,
737 738 739
	[0x10] = handle_set_prefix,
	[0x11] = handle_store_prefix,
	[0x12] = handle_store_cpu_address,
740
	[0x14] = kvm_s390_handle_vsie,
741
	[0x21] = handle_ipte_interlock,
742 743 744
	[0x29] = handle_iske,
	[0x2a] = handle_rrbe,
	[0x2b] = handle_sske,
T
Thomas Huth 已提交
745
	[0x2c] = handle_test_block,
746 747 748 749 750 751 752 753 754 755 756 757 758
	[0x30] = handle_io_inst,
	[0x31] = handle_io_inst,
	[0x32] = handle_io_inst,
	[0x33] = handle_io_inst,
	[0x34] = handle_io_inst,
	[0x35] = handle_io_inst,
	[0x36] = handle_io_inst,
	[0x37] = handle_io_inst,
	[0x38] = handle_io_inst,
	[0x39] = handle_io_inst,
	[0x3a] = handle_io_inst,
	[0x3b] = handle_io_inst,
	[0x3c] = handle_io_inst,
759
	[0x50] = handle_ipte_interlock,
760 761 762
	[0x5f] = handle_io_inst,
	[0x74] = handle_io_inst,
	[0x76] = handle_io_inst,
763 764
	[0x7d] = handle_stsi,
	[0xb1] = handle_stfl,
765
	[0xb2] = handle_lpswe,
766 767
};

768
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
769 770 771
{
	intercept_handler_t handler;

772
	/*
773 774 775 776
	 * A lot of B2 instructions are priviledged. Here we check for
	 * the privileged ones, that we can handle in the kernel.
	 * Anything else goes to userspace.
	 */
777
	handler = b2_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
778 779 780
	if (handler)
		return handler(vcpu);

781
	return -EOPNOTSUPP;
782
}
783

784 785 786 787
static int handle_epsw(struct kvm_vcpu *vcpu)
{
	int reg1, reg2;

788
	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
789 790

	/* This basically extracts the mask half of the psw. */
791
	vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
792 793
	vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
	if (reg2) {
794
		vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
795
		vcpu->run->s.regs.gprs[reg2] |=
796
			vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
797 798 799 800
	}
	return 0;
}

801 802 803 804 805 806 807 808 809 810 811 812
#define PFMF_RESERVED   0xfffc0101UL
#define PFMF_SK         0x00020000UL
#define PFMF_CF         0x00010000UL
#define PFMF_UI         0x00008000UL
#define PFMF_FSC        0x00007000UL
#define PFMF_NQ         0x00000800UL
#define PFMF_MR         0x00000400UL
#define PFMF_MC         0x00000200UL
#define PFMF_KEY        0x000000feUL

static int handle_pfmf(struct kvm_vcpu *vcpu)
{
813
	bool mr = false, mc = false, nq;
814 815
	int reg1, reg2;
	unsigned long start, end;
816
	unsigned char key;
817 818 819 820 821

	vcpu->stat.instruction_pfmf++;

	kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);

822
	if (!test_kvm_facility(vcpu->kvm, 8))
823 824 825
		return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
826
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
827 828 829 830

	if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

831 832 833
	/* Only provide non-quiescing support if enabled for the guest */
	if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
	    !test_kvm_facility(vcpu->kvm, 14))
834 835
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

836 837 838 839 840 841 842 843 844
	/* Only provide conditional-SSKE support if enabled for the guest */
	if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
	    test_kvm_facility(vcpu->kvm, 10)) {
		mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
		mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
	}

	nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
	key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
845
	start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
846
	start = kvm_s390_logical_to_effective(vcpu, start);
T
Thomas Huth 已提交
847

848 849 850 851 852
	if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
		if (kvm_s390_check_low_addr_prot_real(vcpu, start))
			return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
	}

853 854
	switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
	case 0x00000000:
855 856
		/* only 4k frames specify a real address */
		start = kvm_s390_real_to_abs(vcpu, start);
857 858 859 860 861 862
		end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
		break;
	case 0x00001000:
		end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
		break;
	case 0x00002000:
863 864 865 866 867
		/* only support 2G frame size if EDAT2 is available and we are
		   not in 24-bit addressing mode */
		if (!test_kvm_facility(vcpu->kvm, 78) ||
		    psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT)
			return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
868
		end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
869
		break;
870 871 872
	default:
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
	}
873

874
	while (start != end) {
875
		unsigned long useraddr;
T
Thomas Huth 已提交
876 877

		/* Translate guest address to host address */
878
		useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
T
Thomas Huth 已提交
879
		if (kvm_is_error_hva(useraddr))
880 881 882 883 884 885 886 887
			return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);

		if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
			if (clear_user((void __user *)useraddr, PAGE_SIZE))
				return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
		}

		if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
888 889 890 891
			int rc = __skey_check_enable(vcpu);

			if (rc)
				return rc;
892
			down_read(&current->mm->mmap_sem);
893 894
			rc = cond_set_guest_storage_key(current->mm, useraddr,
							key, NULL, nq, mr, mc);
895
			up_read(&current->mm->mmap_sem);
896
			if (rc < 0)
897 898 899 900 901
				return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
		}

		start += PAGE_SIZE;
	}
902 903 904 905 906 907 908 909 910
	if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
		if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_64BIT) {
			vcpu->run->s.regs.gprs[reg2] = end;
		} else {
			vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
			end = kvm_s390_logical_to_effective(vcpu, end);
			vcpu->run->s.regs.gprs[reg2] |= end;
		}
	}
911 912 913
	return 0;
}

914 915 916 917
static int handle_essa(struct kvm_vcpu *vcpu)
{
	/* entries expected to be 1FF */
	int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
918
	unsigned long *cbrlo;
919 920 921
	struct gmap *gmap;
	int i;

922
	VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
923 924
	gmap = vcpu->arch.gmap;
	vcpu->stat.instruction_essa++;
925
	if (!vcpu->kvm->arch.use_cmma)
926 927 928 929 930 931 932 933
		return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

	if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

934 935
	/* Retry the ESSA instruction */
	kvm_s390_retry_instr(vcpu);
936 937 938
	vcpu->arch.sie_block->cbrlo &= PAGE_MASK;	/* reset nceo */
	cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
	down_read(&gmap->mm->mmap_sem);
939 940
	for (i = 0; i < entries; ++i)
		__gmap_zap(gmap, cbrlo[i]);
941 942 943 944
	up_read(&gmap->mm->mmap_sem);
	return 0;
}

945
static const intercept_handler_t b9_handlers[256] = {
946
	[0x8a] = handle_ipte_interlock,
947
	[0x8d] = handle_epsw,
948 949
	[0x8e] = handle_ipte_interlock,
	[0x8f] = handle_ipte_interlock,
950
	[0xab] = handle_essa,
951
	[0xaf] = handle_pfmf,
952 953 954 955 956 957 958 959
};

int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
{
	intercept_handler_t handler;

	/* This is handled just as for the B2 instructions. */
	handler = b9_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
960 961 962
	if (handler)
		return handler(vcpu);

963 964 965
	return -EOPNOTSUPP;
}

966 967 968 969
int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
{
	int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
970 971
	int reg, rc, nr_regs;
	u32 ctl_array[16];
972
	u64 ga;
973
	ar_t ar;
974 975 976 977 978 979

	vcpu->stat.instruction_lctl++;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

980
	ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
981

982
	if (ga & 3)
983 984
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

985
	VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
986
	trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
987

988
	nr_regs = ((reg3 - reg1) & 0xf) + 1;
989
	rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
990 991
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
992
	reg = reg1;
993
	nr_regs = 0;
994 995
	do {
		vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
996
		vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
997 998 999 1000
		if (reg == reg3)
			break;
		reg = (reg + 1) % 16;
	} while (1);
1001
	kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1002 1003 1004
	return 0;
}

1005 1006 1007 1008
int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
{
	int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1009 1010
	int reg, rc, nr_regs;
	u32 ctl_array[16];
1011
	u64 ga;
1012
	ar_t ar;
1013 1014 1015 1016 1017 1018

	vcpu->stat.instruction_stctl++;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

1019
	ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
1020 1021 1022 1023

	if (ga & 3)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

1024
	VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1025 1026 1027
	trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);

	reg = reg1;
1028
	nr_regs = 0;
1029
	do {
1030
		ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1031 1032 1033 1034
		if (reg == reg3)
			break;
		reg = (reg + 1) % 16;
	} while (1);
1035
	rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
1036
	return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1037 1038
}

1039 1040 1041 1042
static int handle_lctlg(struct kvm_vcpu *vcpu)
{
	int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1043 1044 1045
	int reg, rc, nr_regs;
	u64 ctl_array[16];
	u64 ga;
1046
	ar_t ar;
1047 1048 1049 1050 1051 1052

	vcpu->stat.instruction_lctlg++;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

1053
	ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1054

1055
	if (ga & 7)
1056 1057
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

1058
	VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1059
	trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
1060

1061
	nr_regs = ((reg3 - reg1) & 0xf) + 1;
1062
	rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1063 1064 1065 1066
	if (rc)
		return kvm_s390_inject_prog_cond(vcpu, rc);
	reg = reg1;
	nr_regs = 0;
1067
	do {
1068
		vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
1069 1070 1071 1072
		if (reg == reg3)
			break;
		reg = (reg + 1) % 16;
	} while (1);
1073
	kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
1074 1075 1076
	return 0;
}

1077 1078 1079 1080
static int handle_stctg(struct kvm_vcpu *vcpu)
{
	int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
	int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
1081 1082 1083
	int reg, rc, nr_regs;
	u64 ctl_array[16];
	u64 ga;
1084
	ar_t ar;
1085 1086 1087 1088 1089 1090

	vcpu->stat.instruction_stctg++;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

1091
	ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
1092 1093 1094 1095

	if (ga & 7)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

1096
	VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
1097 1098
	trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);

1099 1100
	reg = reg1;
	nr_regs = 0;
1101
	do {
1102
		ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
1103 1104 1105 1106
		if (reg == reg3)
			break;
		reg = (reg + 1) % 16;
	} while (1);
1107
	rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
1108
	return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
1109 1110
}

1111
static const intercept_handler_t eb_handlers[256] = {
1112
	[0x2f] = handle_lctlg,
1113
	[0x25] = handle_stctg,
F
Fan Zhang 已提交
1114 1115 1116
	[0x60] = handle_ri,
	[0x61] = handle_ri,
	[0x62] = handle_ri,
1117 1118
};

1119
int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
1120 1121 1122 1123 1124 1125 1126 1127 1128
{
	intercept_handler_t handler;

	handler = eb_handlers[vcpu->arch.sie_block->ipb & 0xff];
	if (handler)
		return handler(vcpu);
	return -EOPNOTSUPP;
}

1129 1130
static int handle_tprot(struct kvm_vcpu *vcpu)
{
1131
	u64 address1, address2;
1132 1133 1134
	unsigned long hva, gpa;
	int ret = 0, cc = 0;
	bool writable;
1135
	ar_t ar;
1136 1137 1138

	vcpu->stat.instruction_tprot++;

1139 1140 1141
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);

1142
	kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
1143

1144 1145 1146 1147 1148 1149
	/* we only handle the Linux memory detection case:
	 * access key == 0
	 * everything else goes to userspace. */
	if (address2 & 0xf0)
		return -EOPNOTSUPP;
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
1150
		ipte_lock(vcpu);
1151
	ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
1152 1153 1154
	if (ret == PGM_PROTECTION) {
		/* Write protected? Try again with read-only... */
		cc = 1;
1155 1156
		ret = guest_translate_address(vcpu, address1, ar, &gpa,
					      GACC_FETCH);
1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167
	}
	if (ret) {
		if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
			ret = kvm_s390_inject_program_int(vcpu, ret);
		} else if (ret > 0) {
			/* Translation not available */
			kvm_s390_set_psw_cc(vcpu, 3);
			ret = 0;
		}
		goto out_unlock;
	}
1168

1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
	hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
	if (kvm_is_error_hva(hva)) {
		ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
	} else {
		if (!writable)
			cc = 1;		/* Write not permitted ==> read-only */
		kvm_s390_set_psw_cc(vcpu, cc);
		/* Note: CC2 only occurs for storage keys (not supported yet) */
	}
out_unlock:
	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
		ipte_unlock(vcpu);
	return ret;
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
}

int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
{
	/* For e5xx... instructions we only handle TPROT */
	if ((vcpu->arch.sie_block->ipa & 0x00ff) == 0x01)
		return handle_tprot(vcpu);
	return -EOPNOTSUPP;
}

1192 1193 1194 1195 1196
static int handle_sckpf(struct kvm_vcpu *vcpu)
{
	u32 value;

	if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
1197
		return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208

	if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
		return kvm_s390_inject_program_int(vcpu,
						   PGM_SPECIFICATION);

	value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
	vcpu->arch.sie_block->todpr = value;

	return 0;
}

1209 1210 1211 1212 1213 1214 1215
static int handle_ptff(struct kvm_vcpu *vcpu)
{
	/* we don't emulate any control instructions yet */
	kvm_s390_set_psw_cc(vcpu, 3);
	return 0;
}

1216
static const intercept_handler_t x01_handlers[256] = {
1217
	[0x04] = handle_ptff,
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
	[0x07] = handle_sckpf,
};

int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
{
	intercept_handler_t handler;

	handler = x01_handlers[vcpu->arch.sie_block->ipa & 0x00ff];
	if (handler)
		return handler(vcpu);
	return -EOPNOTSUPP;
}