forked from luck/tmp_suning_uos_patched
a86dcc2482
The generically assembled low core labels already contain the address for the TDB. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
248 lines
6.5 KiB
C
248 lines
6.5 KiB
C
/*
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* in-kernel handling for sie intercepts
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*
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* Copyright IBM Corp. 2008, 2009
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License (version 2 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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* Christian Borntraeger <borntraeger@de.ibm.com>
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*/
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#include <linux/kvm_host.h>
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#include <linux/errno.h>
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#include <linux/pagemap.h>
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#include <asm/kvm_host.h>
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#include <asm/asm-offsets.h>
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#include "kvm-s390.h"
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#include "gaccess.h"
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#include "trace.h"
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#include "trace-s390.h"
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static const intercept_handler_t instruction_handlers[256] = {
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[0x01] = kvm_s390_handle_01,
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[0x82] = kvm_s390_handle_lpsw,
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[0x83] = kvm_s390_handle_diag,
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[0xae] = kvm_s390_handle_sigp,
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[0xb2] = kvm_s390_handle_b2,
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[0xb6] = kvm_s390_handle_stctl,
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[0xb7] = kvm_s390_handle_lctl,
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[0xb9] = kvm_s390_handle_b9,
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[0xe5] = kvm_s390_handle_e5,
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[0xeb] = kvm_s390_handle_eb,
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};
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static int handle_noop(struct kvm_vcpu *vcpu)
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{
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switch (vcpu->arch.sie_block->icptcode) {
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case 0x0:
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vcpu->stat.exit_null++;
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break;
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case 0x10:
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vcpu->stat.exit_external_request++;
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break;
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case 0x14:
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vcpu->stat.exit_external_interrupt++;
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break;
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default:
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break; /* nothing */
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}
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return 0;
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}
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static int handle_stop(struct kvm_vcpu *vcpu)
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{
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int rc = 0;
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vcpu->stat.exit_stop_request++;
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spin_lock_bh(&vcpu->arch.local_int.lock);
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trace_kvm_s390_stop_request(vcpu->arch.local_int.action_bits);
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if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) {
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atomic_set_mask(CPUSTAT_STOPPED,
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&vcpu->arch.sie_block->cpuflags);
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vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP;
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VCPU_EVENT(vcpu, 3, "%s", "cpu stopped");
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rc = -EOPNOTSUPP;
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}
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if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) {
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vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP;
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/* store status must be called unlocked. Since local_int.lock
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* only protects local_int.* and not guest memory we can give
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* up the lock here */
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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rc = kvm_s390_vcpu_store_status(vcpu,
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KVM_S390_STORE_STATUS_NOADDR);
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if (rc >= 0)
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rc = -EOPNOTSUPP;
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} else
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spin_unlock_bh(&vcpu->arch.local_int.lock);
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return rc;
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}
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static int handle_validity(struct kvm_vcpu *vcpu)
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{
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int viwhy = vcpu->arch.sie_block->ipb >> 16;
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vcpu->stat.exit_validity++;
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trace_kvm_s390_intercept_validity(vcpu, viwhy);
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WARN_ONCE(true, "kvm: unhandled validity intercept 0x%x\n", viwhy);
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return -EOPNOTSUPP;
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}
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static int handle_instruction(struct kvm_vcpu *vcpu)
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{
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intercept_handler_t handler;
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vcpu->stat.exit_instruction++;
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trace_kvm_s390_intercept_instruction(vcpu,
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vcpu->arch.sie_block->ipa,
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vcpu->arch.sie_block->ipb);
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handler = instruction_handlers[vcpu->arch.sie_block->ipa >> 8];
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if (handler)
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return handler(vcpu);
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return -EOPNOTSUPP;
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}
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static void __extract_prog_irq(struct kvm_vcpu *vcpu,
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struct kvm_s390_pgm_info *pgm_info)
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{
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memset(pgm_info, 0, sizeof(struct kvm_s390_pgm_info));
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pgm_info->code = vcpu->arch.sie_block->iprcc;
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switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
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case PGM_AFX_TRANSLATION:
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case PGM_ASX_TRANSLATION:
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case PGM_EX_TRANSLATION:
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case PGM_LFX_TRANSLATION:
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case PGM_LSTE_SEQUENCE:
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case PGM_LSX_TRANSLATION:
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case PGM_LX_TRANSLATION:
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case PGM_PRIMARY_AUTHORITY:
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case PGM_SECONDARY_AUTHORITY:
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case PGM_SPACE_SWITCH:
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pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
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break;
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case PGM_ALEN_TRANSLATION:
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case PGM_ALE_SEQUENCE:
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case PGM_ASTE_INSTANCE:
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case PGM_ASTE_SEQUENCE:
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case PGM_ASTE_VALIDITY:
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case PGM_EXTENDED_AUTHORITY:
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pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
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break;
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case PGM_ASCE_TYPE:
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case PGM_PAGE_TRANSLATION:
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case PGM_REGION_FIRST_TRANS:
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case PGM_REGION_SECOND_TRANS:
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case PGM_REGION_THIRD_TRANS:
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case PGM_SEGMENT_TRANSLATION:
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pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
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pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
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pgm_info->op_access_id = vcpu->arch.sie_block->oai;
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break;
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case PGM_MONITOR:
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pgm_info->mon_class_nr = vcpu->arch.sie_block->mcn;
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pgm_info->mon_code = vcpu->arch.sie_block->tecmc;
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break;
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case PGM_DATA:
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pgm_info->data_exc_code = vcpu->arch.sie_block->dxc;
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break;
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case PGM_PROTECTION:
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pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
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pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
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break;
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default:
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break;
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}
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if (vcpu->arch.sie_block->iprcc & PGM_PER) {
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pgm_info->per_code = vcpu->arch.sie_block->perc;
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pgm_info->per_atmid = vcpu->arch.sie_block->peratmid;
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pgm_info->per_address = vcpu->arch.sie_block->peraddr;
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pgm_info->per_access_id = vcpu->arch.sie_block->peraid;
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}
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}
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#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
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static int handle_prog(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_pgm_info pgm_info;
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struct kvm_s390_itdb *itdb;
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int rc;
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vcpu->stat.exit_program_interruption++;
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if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
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kvm_s390_handle_per_event(vcpu);
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/* the interrupt might have been filtered out completely */
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if (vcpu->arch.sie_block->iprcc == 0)
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return 0;
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}
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/* Restore ITDB to Program-Interruption TDB in guest memory */
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if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
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goto skip_itdb;
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if (current->thread.per_flags & PER_FLAG_NO_TE)
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goto skip_itdb;
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itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
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rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
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if (rc)
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return rc;
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memset(itdb, 0, sizeof(*itdb));
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skip_itdb:
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trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
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__extract_prog_irq(vcpu, &pgm_info);
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return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
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}
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static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
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{
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int rc, rc2;
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vcpu->stat.exit_instr_and_program++;
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rc = handle_instruction(vcpu);
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rc2 = handle_prog(vcpu);
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if (rc == -EOPNOTSUPP)
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vcpu->arch.sie_block->icptcode = 0x04;
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if (rc)
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return rc;
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return rc2;
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}
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static const intercept_handler_t intercept_funcs[] = {
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[0x00 >> 2] = handle_noop,
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[0x04 >> 2] = handle_instruction,
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[0x08 >> 2] = handle_prog,
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[0x0C >> 2] = handle_instruction_and_prog,
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[0x10 >> 2] = handle_noop,
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[0x14 >> 2] = handle_noop,
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[0x18 >> 2] = handle_noop,
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[0x1C >> 2] = kvm_s390_handle_wait,
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[0x20 >> 2] = handle_validity,
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[0x28 >> 2] = handle_stop,
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};
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int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
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{
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intercept_handler_t func;
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u8 code = vcpu->arch.sie_block->icptcode;
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if (code & 3 || (code >> 2) >= ARRAY_SIZE(intercept_funcs))
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return -EOPNOTSUPP;
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func = intercept_funcs[code >> 2];
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if (func)
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return func(vcpu);
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return -EOPNOTSUPP;
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}
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