/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _S390X_SIE_H_
#define _S390X_SIE_H_

#include <stdint.h>
#include <asm/arch_def.h>

#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 {
	uint32_t 	cpuflags;		/* 0x0000 */
	uint32_t : 1;			/* 0x0004 */
	uint32_t 	prefix : 18;
	uint32_t : 1;
	uint32_t 	ibc : 12;
	uint8_t		reserved08[4];		/* 0x0008 */
#define PROG_IN_SIE (1<<0)
	uint32_t	prog0c;			/* 0x000c */
union {
		uint8_t	reserved10[16];		/* 0x0010 */
		struct {
			uint64_t	pv_handle_cpu;
			uint64_t	pv_handle_config;
		};
	};
#define PROG_BLOCK_SIE	(1<<0)
#define PROG_REQUEST	(1<<1)
	uint32_t 	prog20;		/* 0x0020 */
	uint8_t		reserved24[4];		/* 0x0024 */
	uint64_t	cputm;			/* 0x0028 */
	uint64_t	ckc;			/* 0x0030 */
	uint64_t	epoch;			/* 0x0038 */
	uint32_t	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
	uint16_t   	lctl;			/* 0x0044 */
	int16_t		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
	uint32_t	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
	uint32_t	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_INT_ENABLE	0x64
#define ICPT_PV_INSTR	0x68
#define ICPT_PV_NOTIFY	0x6c
#define ICPT_PV_PREF	0x70
	uint8_t		icptcode;		/* 0x0050 */
	uint8_t		icptstatus;		/* 0x0051 */
	uint16_t	ihcpu;			/* 0x0052 */
	uint8_t		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
	uint8_t		iictl;			/* 0x0055 */
	uint16_t	ipa;			/* 0x0056 */
	uint32_t	ipb;			/* 0x0058 */
	uint32_t	scaoh;			/* 0x005c */
#define FPF_BPBC 	0x20
	uint8_t		fpf;			/* 0x0060 */
#define ECB_GS		0x40
#define ECB_TE		0x10
#define ECB_SPECI	0x08
#define ECB_SRSI	0x04
#define ECB_HOSTPROTINT	0x02
	uint8_t		ecb;			/* 0x0061 */
#define ECB2_CMMA	0x80
#define ECB2_IEP	0x20
#define ECB2_PFMFI	0x08
#define ECB2_ESCA	0x04
	uint8_t    	ecb2;                   /* 0x0062 */
#define ECB3_DEA 0x08
#define ECB3_AES 0x04
#define ECB3_RI  0x01
	uint8_t    	ecb3;			/* 0x0063 */
	uint32_t	scaol;			/* 0x0064 */
	uint8_t		sdf;			/* 0x0068 */
	uint8_t    	epdx;			/* 0x0069 */
	uint8_t    	reserved6a[2];		/* 0x006a */
	uint32_t	todpr;			/* 0x006c */
#define GISA_FORMAT1 0x00000001
	uint32_t	gd;			/* 0x0070 */
	uint8_t		reserved74[12];		/* 0x0074 */
	uint64_t	mso;			/* 0x0080 */
	uint64_t	msl;			/* 0x0088 */
	struct psw	gpsw;			/* 0x0090 */
	uint64_t	gg14;			/* 0x00a0 */
	uint64_t	gg15;			/* 0x00a8 */
	uint8_t		reservedb0[8];		/* 0x00b0 */
#define HPID_KVM	0x4
#define HPID_VSIE	0x5
	uint8_t		hpid;			/* 0x00b8 */
	uint8_t		reservedb9[7];		/* 0x00b9 */
	union {
		struct {
			uint32_t	eiparams;	/* 0x00c0 */
			uint16_t	extcpuaddr;	/* 0x00c4 */
			uint16_t	eic;		/* 0x00c6 */
		};
		uint64_t	mcic;			/* 0x00c0 */
	} __attribute__ ((__packed__));
	uint32_t	reservedc8;		/* 0x00c8 */
	uint16_t	pgmilc;			/* 0x00cc */
	uint16_t	iprcc;			/* 0x00ce */
	uint32_t	dxc;			/* 0x00d0 */
	uint16_t	mcn;			/* 0x00d4 */
	uint8_t		perc;			/* 0x00d6 */
	uint8_t		peratmid;		/* 0x00d7 */
	uint64_t	peraddr;		/* 0x00d8 */
	uint8_t		eai;			/* 0x00e0 */
	uint8_t		peraid;			/* 0x00e1 */
	uint8_t		oai;			/* 0x00e2 */
	uint8_t		armid;			/* 0x00e3 */
	uint8_t		reservede4[4];		/* 0x00e4 */
	uint64_t	tecmc;			/* 0x00e8 */
	uint8_t		reservedf0[12];		/* 0x00f0 */
#define CRYCB_FORMAT_MASK 0x00000003
#define CRYCB_FORMAT0 0x00000000
#define CRYCB_FORMAT1 0x00000001
#define CRYCB_FORMAT2 0x00000003
	uint32_t	crycbd;			/* 0x00fc */
	uint64_t	gcr[16];		/* 0x0100 */
	union {
		uint64_t	gbea;			/* 0x0180 */
		uint64_t	sidad;
	};
	uint8_t		reserved188[8];		/* 0x0188 */
	uint64_t   	sdnxo;			/* 0x0190 */
	uint8_t    	reserved198[8];		/* 0x0198 */
	uint32_t	fac;			/* 0x01a0 */
	uint8_t		reserved1a4[20];	/* 0x01a4 */
	uint64_t	cbrlo;			/* 0x01b8 */
	uint8_t		reserved1c0[8];		/* 0x01c0 */
#define ECD_HOSTREGMGMT	0x20000000
#define ECD_MEF		0x08000000
#define ECD_ETOKENF	0x02000000
#define ECD_ECC		0x00200000
	uint32_t	ecd;			/* 0x01c8 */
	uint8_t		reserved1cc[18];	/* 0x01cc */
	uint64_t	pp;			/* 0x01de */
	uint8_t		reserved1e6[2];		/* 0x01e6 */
	uint64_t	itdba;			/* 0x01e8 */
	uint64_t   	riccbd;			/* 0x01f0 */
	uint64_t	gvrd;			/* 0x01f8 */
	uint64_t	reserved200[48];	/* 0x0200 */
	uint64_t	pv_grregs[16];		/* 0x0380 */
} __attribute__((packed));

union esca_sigp_ctrl {
	uint16_t value;
	struct {
		uint8_t c : 1;
		uint8_t reserved: 7;
		uint8_t scn;
	};
};

struct esca_entry {
	union esca_sigp_ctrl sigp_ctrl;
	uint16_t   reserved1[3];
	uint64_t   sda;
	uint64_t   reserved2[6];
};

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

struct esca_block {
	union ipte_control ipte_control;
	uint64_t   reserved1[7];
	uint64_t   mcn[4];
	uint64_t   reserved2[20];
	struct esca_entry cpu[256];
};

struct vm_uv {
	uint64_t vm_handle;
	uint64_t vcpu_handle;
	uint64_t asce;
	void *conf_base_stor;
	void *conf_var_stor;
	void *cpu_stor;
};

struct vm_save_regs {
	uint64_t asce;
	uint64_t grs[16];
	uint64_t fprs[16];
	uint32_t fpc;
};

/* We might be able to nestle all of this into the stack frame. But
 * having a dedicated save area that saves more than the s390 ELF ABI
 * defines leaves us more freedom in the implementation.
*/
struct vm_save_area {
	struct vm_save_regs guest;
	struct vm_save_regs host;
};

struct vm {
	struct kvm_s390_sie_block *sblk;
	struct vm_save_area save_area;
	struct esca_block *sca;			/* System Control Area */
	uint8_t *crycb;				/* Crypto Control Block */
	struct vm_uv uv;			/* PV UV information */
	/* Ptr to first guest page */
	uint8_t *guest_mem;
	bool validity_expected;
};

extern void sie_entry(void);
extern void sie_exit(void);
extern void sie_entry_gregs(void);
extern void sie_exit_gregs(void);
extern void sie64a(struct kvm_s390_sie_block *sblk, struct vm_save_area *save_area);
void sie(struct vm *vm);
void sie_expect_validity(struct vm *vm);
uint16_t sie_get_validity(struct vm *vm);
void sie_check_validity(struct vm *vm, uint16_t vir_exp);
void sie_handle_validity(struct vm *vm);
void sie_guest_sca_create(struct vm *vm);
void sie_guest_create(struct vm *vm, uint64_t guest_mem, uint64_t guest_mem_len);
void sie_guest_destroy(struct vm *vm);

uint8_t *sie_guest_alloc(uint64_t guest_size);

#endif /* _S390X_SIE_H_ */