path: root/arch/s390/include/asm/kvm_host.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * definition for kernel virtual machines on s390
 *
 * Copyright IBM Corp. 2008, 2018
 *
 *    Author(s): Carsten Otte <cotte@de.ibm.com>
 */


#ifndef ASM_KVM_HOST_H
#define ASM_KVM_HOST_H

#include <linux/types.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/kvm_types.h>
#include <linux/kvm_host.h>
#include <linux/kvm.h>
#include <linux/seqlock.h>
#include <linux/module.h>
#include <asm/debug.h>
#include <asm/cpu.h>
#include <asm/fpu/api.h>
#include <asm/isc.h>
#include <asm/guarded_storage.h>

#define KVM_S390_BSCA_CPU_SLOTS 64
#define KVM_S390_ESCA_CPU_SLOTS 248
#define KVM_MAX_VCPUS 255
#define KVM_USER_MEM_SLOTS 32

/*
 * These seem to be used for allocating ->chip in the routing table,
 * which we don't use. 4096 is an out-of-thin-air value. If we need
 * to look at ->chip later on, we'll need to revisit this.
 */
#define KVM_NR_IRQCHIPS 1
#define KVM_IRQCHIP_NUM_PINS 4096
#define KVM_HALT_POLL_NS_DEFAULT 50000

/* s390-specific vcpu->requests bit members */
#define KVM_REQ_ENABLE_IBS	KVM_ARCH_REQ(0)
#define KVM_REQ_DISABLE_IBS	KVM_ARCH_REQ(1)
#define KVM_REQ_ICPT_OPEREXC	KVM_ARCH_REQ(2)
#define KVM_REQ_START_MIGRATION KVM_ARCH_REQ(3)
#define KVM_REQ_STOP_MIGRATION  KVM_ARCH_REQ(4)
#define KVM_REQ_VSIE_RESTART	KVM_ARCH_REQ(5)

#define SIGP_CTRL_C		0x80
#define SIGP_CTRL_SCN_MASK	0x3f

union bsca_sigp_ctrl {
	__u8 value;
	struct {
		__u8 c : 1;
		__u8 r : 1;
		__u8 scn : 6;
	};
};

union esca_sigp_ctrl {
	__u16 value;
	struct {
		__u8 c : 1;
		__u8 reserved: 7;
		__u8 scn;
	};
};

struct esca_entry {
	union esca_sigp_ctrl sigp_ctrl;
	__u16   reserved1[3];
	__u64   sda;
	__u64   reserved2[6];
};

struct bsca_entry {
	__u8	reserved0;
	union bsca_sigp_ctrl	sigp_ctrl;
	__u16	reserved[3];
	__u64	sda;
	__u64	reserved2[2];
};

union ipte_control {
	unsigned long val;
	struct {
		unsigned long k  : 1;
		unsigned long kh : 31;
		unsigned long kg : 32;
	};
};

struct bsca_block {
	union ipte_control ipte_control;
	__u64	reserved[5];
	__u64	mcn;
	__u64	reserved2;
	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
};

struct esca_block {
	union ipte_control ipte_control;
	__u64   reserved1[7];
	__u64   mcn[4];
	__u64   reserved2[20];
	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
};

/*
 * This struct is used to store some machine check info from lowcore
 * for machine checks that happen while the guest is running.
 * This info in host's lowcore might be overwritten by a second machine
 * check from host when host is in the machine check's high-level handling.
 * The size is 24 bytes.
 */
struct mcck_volatile_info {
	__u64 mcic;
	__u64 failing_storage_address;
	__u32 ext_damage_code;
	__u32 reserved;
};

#define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
			  CR0_MEASUREMENT_ALERT_SUBMASK)
#define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
			   CR14_EXTERNAL_DAMAGE_SUBMASK)

#define SIDAD_SIZE_MASK		0xff
#define sida_origin(sie_block) \
	((sie_block)->sidad & PAGE_MASK)
#define sida_size(sie_block) \
	((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)

#define CPUSTAT_STOPPED    0x80000000
#define CPUSTAT_WAIT       0x10000000
#define CPUSTAT_ECALL_PEND 0x08000000
#define CPUSTAT_STOP_INT   0x04000000
#define CPUSTAT_IO_INT     0x02000000
#define CPUSTAT_EXT_INT    0x01000000
#define CPUSTAT_RUNNING    0x00800000
#define CPUSTAT_RETAINED   0x00400000
#define CPUSTAT_TIMING_SUB 0x00020000
#define CPUSTAT_SIE_SUB    0x00010000
#define CPUSTAT_RRF        0x00008000
#define CPUSTAT_SLSV       0x00004000
#define CPUSTAT_SLSR       0x00002000
#define CPUSTAT_ZARCH      0x00000800
#define CPUSTAT_MCDS       0x00000100
#define CPUSTAT_KSS        0x00000200
#define CPUSTAT_SM         0x00000080
#define CPUSTAT_IBS        0x00000040
#define CPUSTAT_GED2       0x00000010
#define CPUSTAT_G          0x00000008
#define CPUSTAT_GED        0x00000004
#define CPUSTAT_J          0x00000002
#define CPUSTAT_P          0x00000001

struct kvm_s390_sie_block {
	atomic_t cpuflags;		/* 0x0000 */
	__u32 : 1;			/* 0x0004 */
	__u32 prefix : 18;
	__u32 : 1;
	__u32 ibc : 12;
	__u8	reserved08[4];		/* 0x0008 */
#define PROG_IN_SIE (1<<0)
	__u32	prog0c;			/* 0x000c */
	union {
		__u8	reserved10[16];		/* 0x0010 */
		struct {
			__u64	pv_handle_cpu;
			__u64	pv_handle_config;
		};
	};
#define PROG_BLOCK_SIE	(1<<0)
#define PROG_REQUEST	(1<<1)
	atomic_t prog20;		/* 0x0020 */
	__u8	reserved24[4];		/* 0x0024 */
	__u64	cputm;			/* 0x0028 */
	__u64	ckc;			/* 0x0030 */
	__u64	epoch;			/* 0x0038 */
	__u32	svcc;			/* 0x0040 */
#define LCTL_CR0	0x8000
#define LCTL_CR6	0x0200
#define LCTL_CR9	0x0040
#define LCTL_CR10	0x0020
#define LCTL_CR11	0x0010
#define LCTL_CR14	0x0002
	__u16   lctl;			/* 0x0044 */
	__s16	icpua;			/* 0x0046 */
#define ICTL_OPEREXC	0x80000000
#define ICTL_PINT	0x20000000
#define ICTL_LPSW	0x00400000
#define ICTL_STCTL	0x00040000
#define ICTL_ISKE	0x00004000
#define ICTL_SSKE	0x00002000
#define ICTL_RRBE	0x00001000
#define ICTL_TPROT	0x00000200
	__u32	ictl;			/* 0x0048 */
#define ECA_CEI		0x80000000
#define ECA_IB		0x40000000
#define ECA_SIGPI	0x10000000
#define ECA_MVPGI	0x01000000
#define ECA_AIV		0x00200000
#define ECA_VX		0x00020000
#define ECA_PROTEXCI	0x00002000
#define ECA_APIE	0x00000008
#define ECA_SII		0x00000001
	__u32	eca;			/* 0x004c */
#define ICPT_INST	0x04
#define ICPT_PROGI	0x08
#define ICPT_INSTPROGI	0x0C
#define ICPT_EXTREQ	0x10
#define ICPT_EXTINT	0x14
#define ICPT_IOREQ	0x18
#define ICPT_WAIT	0x1c
#define ICPT_VALIDITY	0x20
#define ICPT_STOP	0x28
#define ICPT_OPEREXC	0x2C
#define ICPT_PARTEXEC	0x38
#define ICPT_IOINST	0x40
#define ICPT_KSS	0x5c
#define ICPT_MCHKREQ	0x60
#define ICPT_INT_ENABLE	0x64
#define ICPT_PV_INSTR	0x68
#define ICPT_PV_NOTIFY	0x6c
#define ICPT_PV_PREF	0x70
	__u8	icptcode;		/* 0x0050 */
	__u8	icptstatus;		/* 0x0051 */
	__u16	ihcpu;			/* 0x0052 */
	__u8	reserved54;		/* 0x0054 */
#define IICTL_CODE_NONE		 0x00
#define IICTL_CODE_MCHK		 0x01
#define IICTL_CODE_EXT		 0x02
#define IICTL_CODE_IO		 0x03
#define IICTL_CODE_RESTART	 0x04
#define IICTL_CODE_SPECIFICATION 0x10
#define IICTL_CODE_OPERAND	 0x11
	__u8	iictl;			/* 0x0055 */
	__u16	ipa;			/* 0x0056 */
	__u32	ipb;			/* 0x0058 */
	__u32