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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * definition for kvm on s390
- *
- * Copyright IBM Corp. 2008, 2020
- *
- * Author(s): Carsten Otte <[email protected]>
- * Christian Borntraeger <[email protected]>
- * Christian Ehrhardt <[email protected]>
- */
- #ifndef ARCH_S390_KVM_S390_H
- #define ARCH_S390_KVM_S390_H
- #include <linux/hrtimer.h>
- #include <linux/kvm.h>
- #include <linux/kvm_host.h>
- #include <linux/lockdep.h>
- #include <asm/facility.h>
- #include <asm/processor.h>
- #include <asm/sclp.h>
- /* Transactional Memory Execution related macros */
- #define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & ECB_TE))
- #define TDB_FORMAT1 1
- #define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
- extern debug_info_t *kvm_s390_dbf;
- extern debug_info_t *kvm_s390_dbf_uv;
- #define KVM_UV_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
- do { \
- debug_sprintf_event((d_kvm)->arch.dbf, d_loglevel, d_string "\n", \
- d_args); \
- debug_sprintf_event(kvm_s390_dbf_uv, d_loglevel, \
- "%d: " d_string "\n", (d_kvm)->userspace_pid, \
- d_args); \
- } while (0)
- #define KVM_EVENT(d_loglevel, d_string, d_args...)\
- do { \
- debug_sprintf_event(kvm_s390_dbf, d_loglevel, d_string "\n", \
- d_args); \
- } while (0)
- #define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
- do { \
- debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
- d_args); \
- } while (0)
- #define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
- do { \
- debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
- "%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
- d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
- d_args); \
- } while (0)
- static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
- {
- atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
- }
- static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
- {
- atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
- }
- static inline bool kvm_s390_test_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
- {
- return (atomic_read(&vcpu->arch.sie_block->cpuflags) & flags) == flags;
- }
- static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
- {
- return kvm_s390_test_cpuflags(vcpu, CPUSTAT_STOPPED);
- }
- static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
- {
- return test_bit(vcpu->vcpu_idx, vcpu->kvm->arch.idle_mask);
- }
- static inline int kvm_is_ucontrol(struct kvm *kvm)
- {
- #ifdef CONFIG_KVM_S390_UCONTROL
- if (kvm->arch.gmap)
- return 0;
- return 1;
- #else
- return 0;
- #endif
- }
- #define GUEST_PREFIX_SHIFT 13
- static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
- {
- return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
- }
- static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
- {
- VCPU_EVENT(vcpu, 3, "set prefix of cpu %03u to 0x%x", vcpu->vcpu_id,
- prefix);
- vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
- kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
- kvm_make_request(KVM_REQ_REFRESH_GUEST_PREFIX, vcpu);
- }
- static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu, u8 *ar)
- {
- u32 base2 = vcpu->arch.sie_block->ipb >> 28;
- u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
- if (ar)
- *ar = base2;
- return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
- }
- static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
- u64 *address1, u64 *address2,
- u8 *ar_b1, u8 *ar_b2)
- {
- u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
- u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
- u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
- u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
- *address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
- *address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
- if (ar_b1)
- *ar_b1 = base1;
- if (ar_b2)
- *ar_b2 = base2;
- }
- static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
- {
- if (r1)
- *r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
- if (r2)
- *r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
- }
- static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu, u8 *ar)
- {
- u32 base2 = vcpu->arch.sie_block->ipb >> 28;
- u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
- ((vcpu->arch.sie_block->ipb & 0xff00) << 4);
- /* The displacement is a 20bit _SIGNED_ value */
- if (disp2 & 0x80000)
- disp2+=0xfff00000;
- if (ar)
- *ar = base2;
- return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
- }
- static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu, u8 *ar)
- {
- u32 base2 = vcpu->arch.sie_block->ipb >> 28;
- u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
- if (ar)
- *ar = base2;
- return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
- }
- /* Set the condition code in the guest program status word */
- static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
- {
- vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
- vcpu->arch.sie_block->gpsw.mask |= cc << 44;
- }
- /* test availability of facility in a kvm instance */
- static inline int test_kvm_facility(struct kvm *kvm, unsigned long nr)
- {
- return __test_facility(nr, kvm->arch.model.fac_mask) &&
- __test_facility(nr, kvm->arch.model.fac_list);
- }
- static inline int set_kvm_facility(u64 *fac_list, unsigned long nr)
- {
- unsigned char *ptr;
- if (nr >= MAX_FACILITY_BIT)
- return -EINVAL;
- ptr = (unsigned char *) fac_list + (nr >> 3);
- *ptr |= (0x80UL >> (nr & 7));
- return 0;
- }
- static inline int test_kvm_cpu_feat(struct kvm *kvm, unsigned long nr)
- {
- WARN_ON_ONCE(nr >= KVM_S390_VM_CPU_FEAT_NR_BITS);
- return test_bit_inv(nr, kvm->arch.cpu_feat);
- }
- /* are cpu states controlled by user space */
- static inline int kvm_s390_user_cpu_state_ctrl(struct kvm *kvm)
- {
- return kvm->arch.user_cpu_state_ctrl != 0;
- }
- static inline void kvm_s390_set_user_cpu_state_ctrl(struct kvm *kvm)
- {
- if (kvm->arch.user_cpu_state_ctrl)
- return;
- VM_EVENT(kvm, 3, "%s", "ENABLE: Userspace CPU state control");
- kvm->arch.user_cpu_state_ctrl = 1;
- }
- /* get the end gfn of the last (highest gfn) memslot */
- static inline unsigned long kvm_s390_get_gfn_end(struct kvm_memslots *slots)
- {
- struct rb_node *node;
- struct kvm_memory_slot *ms;
- if (WARN_ON(kvm_memslots_empty(slots)))
- return 0;
- node = rb_last(&slots->gfn_tree);
- ms = container_of(node, struct kvm_memory_slot, gfn_node[slots->node_idx]);
- return ms->base_gfn + ms->npages;
- }
- static inline u32 kvm_s390_get_gisa_desc(struct kvm *kvm)
- {
- u32 gd = (u32)(u64)kvm->arch.gisa_int.origin;
- if (gd && sclp.has_gisaf)
- gd |= GISA_FORMAT1;
- return gd;
- }
- /* implemented in pv.c */
- int kvm_s390_pv_destroy_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
- int kvm_s390_pv_create_cpu(struct kvm_vcpu *vcpu, u16 *rc, u16 *rrc);
- int kvm_s390_pv_deinit_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
- int kvm_s390_pv_init_vm(struct kvm *kvm, u16 *rc, u16 *rrc);
- int kvm_s390_pv_set_sec_parms(struct kvm *kvm, void *hdr, u64 length, u16 *rc,
- u16 *rrc);
- int kvm_s390_pv_unpack(struct kvm *kvm, unsigned long addr, unsigned long size,
- unsigned long tweak, u16 *rc, u16 *rrc);
- int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state);
- int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc);
- int kvm_s390_pv_dump_stor_state(struct kvm *kvm, void __user *buff_user,
- u64 *gaddr, u64 buff_user_len, u16 *rc, u16 *rrc);
- int kvm_s390_pv_dump_complete(struct kvm *kvm, void __user *buff_user,
- u16 *rc, u16 *rrc);
- static inline u64 kvm_s390_pv_get_handle(struct kvm *kvm)
- {
- return kvm->arch.pv.handle;
- }
- static inline u64 kvm_s390_pv_cpu_get_handle(struct kvm_vcpu *vcpu)
- {
- return vcpu->arch.pv.handle;
- }
- static inline bool kvm_s390_pv_is_protected(struct kvm *kvm)
- {
- lockdep_assert_held(&kvm->lock);
- return !!kvm_s390_pv_get_handle(kvm);
- }
- static inline bool kvm_s390_pv_cpu_is_protected(struct kvm_vcpu *vcpu)
- {
- lockdep_assert_held(&vcpu->mutex);
- return !!kvm_s390_pv_cpu_get_handle(vcpu);
- }
- /* implemented in interrupt.c */
- int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
- void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu);
- enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
- int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
- void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
- void kvm_s390_clear_float_irqs(struct kvm *kvm);
- int __must_check kvm_s390_inject_vm(struct kvm *kvm,
- struct kvm_s390_interrupt *s390int);
- int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
- struct kvm_s390_irq *irq);
- static inline int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
- struct kvm_s390_pgm_info *pgm_info)
- {
- struct kvm_s390_irq irq = {
- .type = KVM_S390_PROGRAM_INT,
- .u.pgm = *pgm_info,
- };
- return kvm_s390_inject_vcpu(vcpu, &irq);
- }
- static inline int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
- {
- struct kvm_s390_irq irq = {
- .type = KVM_S390_PROGRAM_INT,
- .u.pgm.code = code,
- };
- return kvm_s390_inject_vcpu(vcpu, &irq);
- }
- struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
- u64 isc_mask, u32 schid);
- int kvm_s390_reinject_io_int(struct kvm *kvm,
- struct kvm_s390_interrupt_info *inti);
- int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
- /* implemented in intercept.c */
- u8 kvm_s390_get_ilen(struct kvm_vcpu *vcpu);
- int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
- static inline void kvm_s390_rewind_psw(struct kvm_vcpu *vcpu, int ilen)
- {
- struct kvm_s390_sie_block *sie_block = vcpu->arch.sie_block;
- sie_block->gpsw.addr = __rewind_psw(sie_block->gpsw, ilen);
- }
- static inline void kvm_s390_forward_psw(struct kvm_vcpu *vcpu, int ilen)
- {
- kvm_s390_rewind_psw(vcpu, -ilen);
- }
- static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
- {
- /* don't inject PER events if we re-execute the instruction */
- vcpu->arch.sie_block->icptstatus &= ~0x02;
- kvm_s390_rewind_psw(vcpu, kvm_s390_get_ilen(vcpu));
- }
- int handle_sthyi(struct kvm_vcpu *vcpu);
- /* implemented in priv.c */
- int is_valid_psw(psw_t *psw);
- int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
- int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu);
- /* implemented in vsie.c */
- int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu);
- void kvm_s390_vsie_kick(struct kvm_vcpu *vcpu);
- void kvm_s390_vsie_gmap_notifier(struct gmap *gmap, unsigned long start,
- unsigned long end);
- void kvm_s390_vsie_init(struct kvm *kvm);
- void kvm_s390_vsie_destroy(struct kvm *kvm);
- /* implemented in sigp.c */
- int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
- /* implemented in kvm-s390.c */
- int kvm_s390_try_set_tod_clock(struct kvm *kvm, const struct kvm_s390_vm_tod_clock *gtod);
- long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
- int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
- int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
- int kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
- int kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
- void kvm_s390_vcpu_block(struct kvm_vcpu *vcpu);
- void kvm_s390_vcpu_unblock(struct kvm_vcpu *vcpu);
- bool kvm_s390_vcpu_sie_inhibited(struct kvm_vcpu *vcpu);
- void exit_sie(struct kvm_vcpu *vcpu);
- void kvm_s390_sync_request(int req, struct kvm_vcpu *vcpu);
- int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
- void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
- void kvm_s390_set_cpu_timer(struct kvm_vcpu *vcpu, __u64 cputm);
- __u64 kvm_s390_get_cpu_timer(struct kvm_vcpu *vcpu);
- int kvm_s390_cpus_from_pv(struct kvm *kvm, u16 *rc, u16 *rrc);
- /* implemented in diag.c */
- int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
- static inline void kvm_s390_vcpu_block_all(struct kvm *kvm)
- {
- unsigned long i;
- struct kvm_vcpu *vcpu;
- WARN_ON(!mutex_is_locked(&kvm->lock));
- kvm_for_each_vcpu(i, vcpu, kvm)
- kvm_s390_vcpu_block(vcpu);
- }
- static inline void kvm_s390_vcpu_unblock_all(struct kvm *kvm)
- {
- unsigned long i;
- struct kvm_vcpu *vcpu;
- kvm_for_each_vcpu(i, vcpu, kvm)
- kvm_s390_vcpu_unblock(vcpu);
- }
- static inline u64 kvm_s390_get_tod_clock_fast(struct kvm *kvm)
- {
- u64 rc;
- preempt_disable();
- rc = get_tod_clock_fast() + kvm->arch.epoch;
- preempt_enable();
- return rc;
- }
- /**
- * kvm_s390_inject_prog_cond - conditionally inject a program check
- * @vcpu: virtual cpu
- * @rc: original return/error code
- *
- * This function is supposed to be used after regular guest access functions
- * failed, to conditionally inject a program check to a vcpu. The typical
- * pattern would look like
- *
- * rc = write_guest(vcpu, addr, data, len);
- * if (rc)
- * return kvm_s390_inject_prog_cond(vcpu, rc);
- *
- * A negative return code from guest access functions implies an internal error
- * like e.g. out of memory. In these cases no program check should be injected
- * to the guest.
- * A positive value implies that an exception happened while accessing a guest's
- * memory. In this case all data belonging to the corresponding program check
- * has been stored in vcpu->arch.pgm and can be injected with
- * kvm_s390_inject_prog_irq().
- *
- * Returns: - the original @rc value if @rc was negative (internal error)
- * - zero if @rc was already zero
- * - zero or error code from injecting if @rc was positive
- * (program check injected to @vcpu)
- */
- static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
- {
- if (rc <= 0)
- return rc;
- return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
- }
- int s390int_to_s390irq(struct kvm_s390_interrupt *s390int,
- struct kvm_s390_irq *s390irq);
- /* implemented in interrupt.c */
- int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop);
- int psw_extint_disabled(struct kvm_vcpu *vcpu);
- void kvm_s390_destroy_adapters(struct kvm *kvm);
- int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu);
- extern struct kvm_device_ops kvm_flic_ops;
- int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu);
- int kvm_s390_is_restart_irq_pending(struct kvm_vcpu *vcpu);
- void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu);
- int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu,
- void __user *buf, int len);
- int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu,
- __u8 __user *buf, int len);
- void kvm_s390_gisa_init(struct kvm *kvm);
- void kvm_s390_gisa_clear(struct kvm *kvm);
- void kvm_s390_gisa_destroy(struct kvm *kvm);
- void kvm_s390_gisa_disable(struct kvm *kvm);
- void kvm_s390_gisa_enable(struct kvm *kvm);
- int kvm_s390_gib_init(u8 nisc);
- void kvm_s390_gib_destroy(void);
- /* implemented in guestdbg.c */
- void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
- void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
- void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
- int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
- struct kvm_guest_debug *dbg);
- void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
- void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_per_ifetch_icpt(struct kvm_vcpu *vcpu);
- int kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
- /* support for Basic/Extended SCA handling */
- static inline union ipte_control *kvm_s390_get_ipte_control(struct kvm *kvm)
- {
- struct bsca_block *sca = kvm->arch.sca; /* SCA version doesn't matter */
- return &sca->ipte_control;
- }
- static inline int kvm_s390_use_sca_entries(void)
- {
- /*
- * Without SIGP interpretation, only SRS interpretation (if available)
- * might use the entries. By not setting the entries and keeping them
- * invalid, hardware will not access them but intercept.
- */
- return sclp.has_sigpif;
- }
- void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu,
- struct mcck_volatile_info *mcck_info);
- /**
- * kvm_s390_vcpu_crypto_reset_all
- *
- * Reset the crypto attributes for each vcpu. This can be done while the vcpus
- * are running as each vcpu will be removed from SIE before resetting the crypt
- * attributes and restored to SIE afterward.
- *
- * Note: The kvm->lock must be held while calling this function
- *
- * @kvm: the KVM guest
- */
- void kvm_s390_vcpu_crypto_reset_all(struct kvm *kvm);
- /**
- * kvm_s390_vcpu_pci_enable_interp
- *
- * Set the associated PCI attributes for each vcpu to allow for zPCI Load/Store
- * interpretation as well as adapter interruption forwarding.
- *
- * @kvm: the KVM guest
- */
- void kvm_s390_vcpu_pci_enable_interp(struct kvm *kvm);
- /**
- * diag9c_forwarding_hz
- *
- * Set the maximum number of diag9c forwarding per second
- */
- extern unsigned int diag9c_forwarding_hz;
- #endif
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