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.h>
#include <linux/seqlock.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/mmu_notifier.h>
#include <asm/kvm_host_types.h>
#include <asm/debug.h>
#include <asm/cpu.h>
#include <asm/fpu.h>
#include <asm/isc.h>
#include <asm/guarded_storage.h>

#define KVM_MAX_VCPUS 255

#define KVM_INTERNAL_MEM_SLOTS 1

/*
 * These seem to be used for allocating ->chip in the routing table, which we
 * don't use. 1 is as small as we can get to reduce the needed memory. 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 1
#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 KVM_REQ_REFRESH_GUEST_PREFIX	\
	KVM_ARCH_REQ_FLAGS(6, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)

struct kvm_vcpu_stat {
	struct kvm_vcpu_stat_generic generic;
	u64 exit_userspace;
	u64 exit_null;
	u64 exit_external_request;
	u64 exit_io_request;
	u64 exit_external_interrupt;
	u64 exit_stop_request;
	u64 exit_validity;
	u64 exit_instruction;
	u64 exit_pei;
	u64 halt_no_poll_steal;
	u64 instruction_lctl;
	u64 instruction_lctlg;
	u64 instruction_stctl;
	u64 instruction_stctg;
	u64 exit_program_interruption;
	u64 exit_instr_and_program;
	u64 exit_operation_exception;
	u64 deliver_ckc;
	u64 deliver_cputm;
	u64 deliver_external_call;
	u64 deliver_emergency_signal;
	u64 deliver_service_signal;
	u64 deliver_virtio;
	u64 deliver_stop_signal;
	u64 deliver_prefix_signal;
	u64 deliver_restart_signal;
	u64 deliver_program;
	u64 deliver_io;
	u64 deliver_machine_check;
	u64 exit_wait_state;
	u64 inject_ckc;
	u64 inject_cputm;
	u64 inject_external_call;
	u64 inject_emergency_signal;
	u64 inject_mchk;
	u64 inject_pfault_init;
	u64 inject_program;
	u64 inject_restart;
	u64 inject_set_prefix;
	u64 inject_stop_signal;
	u64 instruction_epsw;
	u64 instruction_gs;
	u64 instruction_io_other;
	u64 instruction_lpsw;
	u64 instruction_lpswe;
	u64 instruction_lpswey;
	u64 instruction_pfmf;
	u64 instruction_ptff;
	u64 instruction_sck;
	u64 instruction_sckpf;
	u64 instruction_stidp;
	u64 instruction_spx;
	u64 instruction_stpx;
	u64 instruction_stap;
	u64 instruction_iske;
	u64 instruction_ri;
	u64 instruction_rrbe;
	u64 instruction_sske;
	u64 instruction_ipte_interlock;
	u64 instruction_stsi;
	u64 instruction_stfl;
	u64 instruction_tb;
	u64 instruction_tpi;
	u64 instruction_tprot;
	u64 instruction_tsch;
	u64 instruction_sie;
	u64 instruction_essa;
	u64 instruction_sthyi;
	u64 instruction_sigp_sense;
	u64 instruction_sigp_sense_running;
	u64 instruction_sigp_external_call;
	u64 instruction_sigp_emergency;
	u64 instruction_sigp_cond_emergency;
	u64 instruction_sigp_start;
	u64 instruction_sigp_stop;
	u64 instruction_sigp_stop_store_status;
	u64 instruction_sigp_store_status;
	u64 instruction_sigp_store_adtl_status;
	u64 instruction_sigp_arch;
	u64 instruction_sigp_prefix;
	u64 instruction_sigp_restart;
	u64 instruction_sigp_init_cpu_reset;
	u64 instruction_sigp_cpu_reset;
	u64 instruction_sigp_unknown;
	u64 instruction_diagnose_10;
	u64 instruction_diagnose_44;
	u64 instruction_diagnose_9c;
	u64 diag_9c_ignored;
	u64 diag_9c_forward;
	u64 instruction_diagnose_258;
	u64 instruction_diagnose_308;
	u64 instruction_diagnose_500;
	u64 instruction_diagnose_other;
	u64 pfault_sync;
	u64 signal_exits;
};

#define PGM_OPERATION			0x01
#define PGM_PRIVILEGED_OP		0x02
#define PGM_EXECUTE			0x03
#define PGM_PROTECTION			0x04
#define PGM_ADDRESSING			0x05
#define PGM_SPECIFICATION		0x06
#define PGM_DATA			0x07
#define PGM_FIXED_POINT_OVERFLOW	0x08
#define PGM_FIXED_POINT_DIVIDE		0x09
#define PGM_DECIMAL_OVERFLOW		0x0a
#define PGM_DECIMAL_DIVIDE		0x0b
#define PGM_HFP_EXPONENT_OVERFLOW	0x0c
#define PGM_HFP_EXPONENT_UNDERFLOW	0x0d
#define PGM_HFP_SIGNIFICANCE		0x0e
#define PGM_HFP_DIVIDE			0x0f
#define PGM_SEGMENT_TRANSLATION		0x10
#define PGM_PAGE_TRANSLATION		0x11
#define PGM_TRANSLATION_SPEC		0x12
#define PGM_SPECIAL_OPERATION		0x13
#define PGM_OPERAND			0x15
#define PGM_TRACE_TABEL			0x16
#define PGM_VECTOR_PROCESSING		0x1b
#define PGM_SPACE_SWITCH		0x1c
#define PGM_HFP_SQUARE_ROOT		0x1d
#define PGM_PC_TRANSLATION_SPEC		0x1f
#define PGM_AFX_TRANSLATION		0x20
#define PGM_ASX_TRANSLATION		0x21
#define PGM_LX_TRANSLATION		0x22
#define PGM_EX_TRANSLATION		0x23
#define PGM_PRIMARY_AUTHORITY		0x24
#define PGM_SECONDARY_AUTHORITY		0x25
#define PGM_LFX_TRANSLATION		0x26
#define PGM_LSX_TRANSLATION		0x27
#define PGM_ALET_SPECIFICATION		0x28
#define PGM_ALEN_TRANSLATION		0x29
#define PGM_ALE_SEQUENCE		0x2a
#define PGM_ASTE_VALIDITY		0x2b
#define PGM_ASTE_SEQUENCE		0x2c
#define PGM_EXTENDED_AUTHORITY		0x2d
#define PGM_LSTE_SEQUENCE		0x2e
#define PGM_ASTE_INSTANCE		0x2f
#define PGM_STACK_FULL			0x30
#define PGM_STACK_EMPTY			0x31
#define PGM_STACK_SPECIFICATION		0x32
#define PGM_STACK_TYPE			0x33
#define PGM_STACK_OPERATION		0x34
#define PGM_ASCE_TYPE			0x38
#define PGM_REGION_FIRST_TRANS		0x39
#define PGM_REGION_SECOND_TRANS		0x3a
#define PGM_REGION_THIRD_TRANS		0x3b
#define PGM_SECURE_STORAGE_ACCESS	0x3d
#define PGM_NON_SECURE_STORAGE_ACCESS	0x3e
#define PGM_SECURE_STORAGE_VIOLATION	0x3f
#define PGM_MONITOR			0x40
#define PGM_PER				0x80
#define PGM_CRYPTO_OPERATION		0x119

/* irq types in ascend order of priorities */
enum irq_types {
	IRQ_PEND_SET_PREFIX = 0,
	IRQ_PEND_RESTART,
	IRQ_PEND_SIGP_STOP,
	IRQ_PEND_IO_ISC_7,
	IRQ_PEND_IO_ISC_6,
	IRQ_PEND_IO_ISC_5,
	IRQ_PEND_IO_ISC_4,
	IRQ_PEND_IO_ISC_3,
	IRQ_PEND_IO_ISC_2,
	IRQ_PEND_IO_ISC_1,
	IRQ_PEND_IO_ISC_0,
	IRQ_PEND_VIRTIO,
	IRQ_PEND_PFAULT_DONE,
	IRQ_PEND_PFAULT_INIT,
	IRQ_PEND_EXT_HOST,
	IRQ_PEND_EXT_SERVICE,
	IRQ_PEND_EXT_SERVICE_EV,
	IRQ_PEND_EXT_TIMING,
	IRQ_PEND_EXT_CPU_TIMER,
	IRQ_PEND_EXT_CLOCK_COMP,
	IRQ_PEND_EXT_EXTERNAL,
	IRQ_PEND_EXT_EMERGENCY,
	IRQ_PEND_EXT_MALFUNC,
	IRQ_PEND_EXT_IRQ_KEY,
	IRQ_PEND_MCHK_REP,
	IRQ_PEND_PROG,
	IRQ_PEND_SVC,
	IRQ_PEND_MCHK_EX,
	IRQ_PEND_COUNT
};

/* We have 2M for virtio device descriptor pages. Smallest amount of
 * memory per page is 24 bytes (1 queue), so (2048*1024) / 24 = 87381
 */
#define KVM_S390_MAX_VIRTIO_IRQS 87381

/*
 * Repressible (non-floating) machine check interrupts
 * subclass bits in MCIC
 */
#define MCHK_EXTD_BIT 58
#define MCHK_DEGR_BIT 56
#define MCHK_WARN_BIT 55
#define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) | \
		       (1UL << MCHK_EXTD_BIT) | \
		       (1UL << MCHK_WARN_BIT))

/* Exigent machine check interrupts subclass bits in MCIC */
#define MCHK_SD_BIT 63
#define MCHK_PD_BIT 62
#define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) | (1UL << MCHK_PD_BIT))

#define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY)    | \
			   (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
			   (1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
			   (1UL << IRQ_PEND_EXT_MALFUNC)    | \
			   (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
			   (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
			   (1UL << IRQ_PEND_EXT_TIMING)     | \
			   (1UL << IRQ_PEND_EXT_HOST)       | \
			   (1UL << IRQ_PEND_EXT_SERVICE)    | \
			   (1UL << IRQ_PEND_EXT_SERVICE_EV) | \
			   (1UL << IRQ_PEND_VIRTIO)         | \
			   (1UL << IRQ_PEND_PFAULT_INIT)    | \
			   (1UL << IRQ_PEND_PFAULT_DONE))

#define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) | \
			  (1UL << IRQ_PEND_IO_ISC_1) | \
			  (1UL << IRQ_PEND_IO_ISC_2) | \
			  (1UL << IRQ_PEND_IO_ISC_3) | \
			  (1UL << IRQ_PEND_IO_ISC_4) | \
			  (1UL << IRQ_PEND_IO_ISC_5) | \
			  (1UL << IRQ_PEND_IO_ISC_6) | \
			  (1UL << IRQ_PEND_IO_ISC_7))

#define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) | \
			    (1UL << IRQ_PEND_MCHK_EX))

#define IRQ_PEND_EXT_II_MASK ((1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
			      (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
			      (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
			      (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
			      (1UL << IRQ_PEND_EXT_SERVICE)    | \
			      (1UL << IRQ_PEND_EXT_SERVICE_EV))

struct kvm_s390_interrupt_info {
	struct list_head list;
	u64	type;
	union {
		struct kvm_s390_io_info io;
		struct kvm_s390_ext_info ext;
		struct kvm_s390_pgm_info pgm;
		struct kvm_s390_emerg_info emerg;
		struct kvm_s390_extcall_info extcall;
		struct kvm_s390_prefix_info prefix;
		struct kvm_s390_stop_info stop;
		struct kvm_s390_mchk_info mchk;
	};
};

struct kvm_s390_irq_payload {
	struct kvm_s390_io_info io;
	struct kvm_s390_ext_info ext;
	struct kvm_s390_pgm_info pgm;
	struct kvm_s390_emerg_info emerg;
	struct kvm_s390_extcall_info extcall;
	struct kvm_s390_prefix_info prefix;
	struct kvm_s390_stop_info stop;
	struct kvm_s390_mchk_info mchk;
};

struct kvm_s390_local_interrupt {
	spinlock_t lock;
	DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCP