1537 lines
41 KiB
C
1537 lines
41 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* handling privileged instructions
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*
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* Copyright IBM Corp. 2008, 2018
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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.h>
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#include <linux/gfp.h>
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#include <linux/errno.h>
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#include <linux/compat.h>
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#include <linux/mm_types.h>
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#include <asm/asm-offsets.h>
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#include <asm/facility.h>
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#include <asm/current.h>
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#include <asm/debug.h>
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#include <asm/ebcdic.h>
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#include <asm/sysinfo.h>
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#include <asm/pgtable.h>
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#include <asm/page-states.h>
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#include <asm/pgalloc.h>
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#include <asm/gmap.h>
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#include <asm/io.h>
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#include <asm/ptrace.h>
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#include <asm/sclp.h>
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#include <asm/ap.h>
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#include "gaccess.h"
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#include "kvm-s390.h"
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#include "trace.h"
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static int handle_ri(struct kvm_vcpu *vcpu)
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{
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vcpu->stat.instruction_ri++;
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if (test_kvm_facility(vcpu->kvm, 64)) {
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VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (lazy)");
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vcpu->arch.sie_block->ecb3 |= ECB3_RI;
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kvm_s390_retry_instr(vcpu);
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return 0;
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} else
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return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
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}
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int kvm_s390_handle_aa(struct kvm_vcpu *vcpu)
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{
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if ((vcpu->arch.sie_block->ipa & 0xf) <= 4)
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return handle_ri(vcpu);
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else
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return -EOPNOTSUPP;
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}
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static int handle_gs(struct kvm_vcpu *vcpu)
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{
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vcpu->stat.instruction_gs++;
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if (test_kvm_facility(vcpu->kvm, 133)) {
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VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (lazy)");
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preempt_disable();
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__ctl_set_bit(2, 4);
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current->thread.gs_cb = (struct gs_cb *)&vcpu->run->s.regs.gscb;
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restore_gs_cb(current->thread.gs_cb);
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preempt_enable();
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vcpu->arch.sie_block->ecb |= ECB_GS;
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vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
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vcpu->arch.gs_enabled = 1;
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kvm_s390_retry_instr(vcpu);
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return 0;
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} else
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return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
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}
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int kvm_s390_handle_e3(struct kvm_vcpu *vcpu)
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{
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int code = vcpu->arch.sie_block->ipb & 0xff;
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if (code == 0x49 || code == 0x4d)
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return handle_gs(vcpu);
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else
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return -EOPNOTSUPP;
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}
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/* Handle SCK (SET CLOCK) interception */
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static int handle_set_clock(struct kvm_vcpu *vcpu)
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{
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struct kvm_s390_vm_tod_clock gtod = { 0 };
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int rc;
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u8 ar;
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u64 op2;
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vcpu->stat.instruction_sck++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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op2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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if (op2 & 7) /* Operand must be on a doubleword boundary */
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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rc = read_guest(vcpu, op2, ar, >od.tod, sizeof(gtod.tod));
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if (rc)
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return kvm_s390_inject_prog_cond(vcpu, rc);
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VCPU_EVENT(vcpu, 3, "SCK: setting guest TOD to 0x%llx", gtod.tod);
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kvm_s390_set_tod_clock(vcpu->kvm, >od);
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kvm_s390_set_psw_cc(vcpu, 0);
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return 0;
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}
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static int handle_set_prefix(struct kvm_vcpu *vcpu)
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{
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u64 operand2;
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u32 address;
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int rc;
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u8 ar;
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vcpu->stat.instruction_spx++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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/* must be word boundary */
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if (operand2 & 3)
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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/* get the value */
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rc = read_guest(vcpu, operand2, ar, &address, sizeof(address));
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if (rc)
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return kvm_s390_inject_prog_cond(vcpu, rc);
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address &= 0x7fffe000u;
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/*
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* Make sure the new value is valid memory. We only need to check the
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* first page, since address is 8k aligned and memory pieces are always
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* at least 1MB aligned and have at least a size of 1MB.
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*/
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if (kvm_is_error_gpa(vcpu->kvm, address))
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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kvm_s390_set_prefix(vcpu, address);
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trace_kvm_s390_handle_prefix(vcpu, 1, address);
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return 0;
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}
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static int handle_store_prefix(struct kvm_vcpu *vcpu)
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{
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u64 operand2;
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u32 address;
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int rc;
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u8 ar;
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vcpu->stat.instruction_stpx++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
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/* must be word boundary */
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if (operand2 & 3)
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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address = kvm_s390_get_prefix(vcpu);
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/* get the value */
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rc = write_guest(vcpu, operand2, ar, &address, sizeof(address));
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if (rc)
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return kvm_s390_inject_prog_cond(vcpu, rc);
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VCPU_EVENT(vcpu, 3, "STPX: storing prefix 0x%x into 0x%llx", address, operand2);
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trace_kvm_s390_handle_prefix(vcpu, 0, address);
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return 0;
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}
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static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
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{
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u16 vcpu_id = vcpu->vcpu_id;
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u64 ga;
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int rc;
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u8 ar;
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vcpu->stat.instruction_stap++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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ga = kvm_s390_get_base_disp_s(vcpu, &ar);
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if (ga & 1)
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return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
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rc = write_guest(vcpu, ga, ar, &vcpu_id, sizeof(vcpu_id));
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if (rc)
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return kvm_s390_inject_prog_cond(vcpu, rc);
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VCPU_EVENT(vcpu, 3, "STAP: storing cpu address (%u) to 0x%llx", vcpu_id, ga);
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trace_kvm_s390_handle_stap(vcpu, ga);
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return 0;
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}
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int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu)
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{
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int rc;
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trace_kvm_s390_skey_related_inst(vcpu);
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/* Already enabled? */
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if (vcpu->arch.skey_enabled)
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return 0;
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rc = s390_enable_skey();
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VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
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if (rc)
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return rc;
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if (kvm_s390_test_cpuflags(vcpu, CPUSTAT_KSS))
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kvm_s390_clear_cpuflags(vcpu, CPUSTAT_KSS);
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if (!vcpu->kvm->arch.use_skf)
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vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
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else
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vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
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vcpu->arch.skey_enabled = true;
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return 0;
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}
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static int try_handle_skey(struct kvm_vcpu *vcpu)
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{
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int rc;
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rc = kvm_s390_skey_check_enable(vcpu);
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if (rc)
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return rc;
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if (vcpu->kvm->arch.use_skf) {
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/* with storage-key facility, SIE interprets it for us */
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kvm_s390_retry_instr(vcpu);
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VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation");
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return -EAGAIN;
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}
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return 0;
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}
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static int handle_iske(struct kvm_vcpu *vcpu)
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{
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unsigned long gaddr, vmaddr;
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unsigned char key;
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int reg1, reg2;
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bool unlocked;
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int rc;
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vcpu->stat.instruction_iske++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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rc = try_handle_skey(vcpu);
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if (rc)
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return rc != -EAGAIN ? rc : 0;
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kvm_s390_get_regs_rre(vcpu, ®1, ®2);
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gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
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gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
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gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
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vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
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if (kvm_is_error_hva(vmaddr))
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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retry:
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unlocked = false;
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down_read(¤t->mm->mmap_sem);
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rc = get_guest_storage_key(current->mm, vmaddr, &key);
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if (rc) {
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rc = fixup_user_fault(current, current->mm, vmaddr,
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FAULT_FLAG_WRITE, &unlocked);
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if (!rc) {
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up_read(¤t->mm->mmap_sem);
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goto retry;
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}
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}
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up_read(¤t->mm->mmap_sem);
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if (rc == -EFAULT)
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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if (rc < 0)
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return rc;
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vcpu->run->s.regs.gprs[reg1] &= ~0xff;
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vcpu->run->s.regs.gprs[reg1] |= key;
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return 0;
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}
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static int handle_rrbe(struct kvm_vcpu *vcpu)
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{
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unsigned long vmaddr, gaddr;
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int reg1, reg2;
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bool unlocked;
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int rc;
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vcpu->stat.instruction_rrbe++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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rc = try_handle_skey(vcpu);
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if (rc)
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return rc != -EAGAIN ? rc : 0;
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kvm_s390_get_regs_rre(vcpu, ®1, ®2);
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gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
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gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
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gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
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vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
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if (kvm_is_error_hva(vmaddr))
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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retry:
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unlocked = false;
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down_read(¤t->mm->mmap_sem);
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rc = reset_guest_reference_bit(current->mm, vmaddr);
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if (rc < 0) {
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rc = fixup_user_fault(current, current->mm, vmaddr,
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FAULT_FLAG_WRITE, &unlocked);
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if (!rc) {
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up_read(¤t->mm->mmap_sem);
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goto retry;
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}
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}
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up_read(¤t->mm->mmap_sem);
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if (rc == -EFAULT)
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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if (rc < 0)
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return rc;
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kvm_s390_set_psw_cc(vcpu, rc);
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return 0;
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}
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#define SSKE_NQ 0x8
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#define SSKE_MR 0x4
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#define SSKE_MC 0x2
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#define SSKE_MB 0x1
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static int handle_sske(struct kvm_vcpu *vcpu)
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{
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unsigned char m3 = vcpu->arch.sie_block->ipb >> 28;
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unsigned long start, end;
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unsigned char key, oldkey;
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int reg1, reg2;
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bool unlocked;
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int rc;
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vcpu->stat.instruction_sske++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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rc = try_handle_skey(vcpu);
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if (rc)
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return rc != -EAGAIN ? rc : 0;
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if (!test_kvm_facility(vcpu->kvm, 8))
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m3 &= ~SSKE_MB;
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if (!test_kvm_facility(vcpu->kvm, 10))
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m3 &= ~(SSKE_MC | SSKE_MR);
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if (!test_kvm_facility(vcpu->kvm, 14))
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m3 &= ~SSKE_NQ;
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kvm_s390_get_regs_rre(vcpu, ®1, ®2);
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key = vcpu->run->s.regs.gprs[reg1] & 0xfe;
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start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
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start = kvm_s390_logical_to_effective(vcpu, start);
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if (m3 & SSKE_MB) {
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/* start already designates an absolute address */
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end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
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} else {
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start = kvm_s390_real_to_abs(vcpu, start);
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end = start + PAGE_SIZE;
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}
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while (start != end) {
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unsigned long vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
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unlocked = false;
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if (kvm_is_error_hva(vmaddr))
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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down_read(¤t->mm->mmap_sem);
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rc = cond_set_guest_storage_key(current->mm, vmaddr, key, &oldkey,
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m3 & SSKE_NQ, m3 & SSKE_MR,
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m3 & SSKE_MC);
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if (rc < 0) {
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rc = fixup_user_fault(current, current->mm, vmaddr,
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FAULT_FLAG_WRITE, &unlocked);
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rc = !rc ? -EAGAIN : rc;
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}
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up_read(¤t->mm->mmap_sem);
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if (rc == -EFAULT)
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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if (rc < 0)
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return rc;
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start += PAGE_SIZE;
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}
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if (m3 & (SSKE_MC | SSKE_MR)) {
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if (m3 & SSKE_MB) {
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/* skey in reg1 is unpredictable */
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kvm_s390_set_psw_cc(vcpu, 3);
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} else {
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kvm_s390_set_psw_cc(vcpu, rc);
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vcpu->run->s.regs.gprs[reg1] &= ~0xff00UL;
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vcpu->run->s.regs.gprs[reg1] |= (u64) oldkey << 8;
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}
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}
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if (m3 & SSKE_MB) {
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if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT)
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vcpu->run->s.regs.gprs[reg2] &= ~PAGE_MASK;
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else
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vcpu->run->s.regs.gprs[reg2] &= ~0xfffff000UL;
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end = kvm_s390_logical_to_effective(vcpu, end);
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vcpu->run->s.regs.gprs[reg2] |= end;
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}
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return 0;
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}
|
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static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
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{
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vcpu->stat.instruction_ipte_interlock++;
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if (psw_bits(vcpu->arch.sie_block->gpsw).pstate)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
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kvm_s390_retry_instr(vcpu);
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VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
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return 0;
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}
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static int handle_test_block(struct kvm_vcpu *vcpu)
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{
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gpa_t addr;
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int reg2;
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vcpu->stat.instruction_tb++;
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if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
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return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
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kvm_s390_get_regs_rre(vcpu, NULL, ®2);
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addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
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addr = kvm_s390_logical_to_effective(vcpu, addr);
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if (kvm_s390_check_low_addr_prot_real(vcpu, addr))
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return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
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addr = kvm_s390_real_to_abs(vcpu, addr);
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if (kvm_is_error_gpa(vcpu->kvm, addr))
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return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
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/*
|
|
* We don't expect errors on modern systems, and do not care
|
|
* about storage keys (yet), so let's just clear the page.
|
|
*/
|
|
if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
|
|
return -EFAULT;
|
|
kvm_s390_set_psw_cc(vcpu, 0);
|
|
vcpu->run->s.regs.gprs[0] = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int handle_tpi(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_interrupt_info *inti;
|
|
unsigned long len;
|
|
u32 tpi_data[3];
|
|
int rc;
|
|
u64 addr;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_tpi++;
|
|
|
|
addr = kvm_s390_get_base_disp_s(vcpu, &ar);
|
|
if (addr & 3)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
inti = kvm_s390_get_io_int(vcpu->kvm, vcpu->arch.sie_block->gcr[6], 0);
|
|
if (!inti) {
|
|
kvm_s390_set_psw_cc(vcpu, 0);
|
|
return 0;
|
|
}
|
|
|
|
tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
|
|
tpi_data[1] = inti->io.io_int_parm;
|
|
tpi_data[2] = inti->io.io_int_word;
|
|
if (addr) {
|
|
/*
|
|
* Store the two-word I/O interruption code into the
|
|
* provided area.
|
|
*/
|
|
len = sizeof(tpi_data) - 4;
|
|
rc = write_guest(vcpu, addr, ar, &tpi_data, len);
|
|
if (rc) {
|
|
rc = kvm_s390_inject_prog_cond(vcpu, rc);
|
|
goto reinject_interrupt;
|
|
}
|
|
} else {
|
|
/*
|
|
* Store the three-word I/O interruption code into
|
|
* the appropriate lowcore area.
|
|
*/
|
|
len = sizeof(tpi_data);
|
|
if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len)) {
|
|
/* failed writes to the low core are not recoverable */
|
|
rc = -EFAULT;
|
|
goto reinject_interrupt;
|
|
}
|
|
}
|
|
|
|
/* irq was successfully handed to the guest */
|
|
kfree(inti);
|
|
kvm_s390_set_psw_cc(vcpu, 1);
|
|
return 0;
|
|
reinject_interrupt:
|
|
/*
|
|
* If we encounter a problem storing the interruption code, the
|
|
* instruction is suppressed from the guest's view: reinject the
|
|
* interrupt.
|
|
*/
|
|
if (kvm_s390_reinject_io_int(vcpu->kvm, inti)) {
|
|
kfree(inti);
|
|
rc = -EFAULT;
|
|
}
|
|
/* don't set the cc, a pgm irq was injected or we drop to user space */
|
|
return rc ? -EFAULT : 0;
|
|
}
|
|
|
|
static int handle_tsch(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_s390_interrupt_info *inti = NULL;
|
|
const u64 isc_mask = 0xffUL << 24; /* all iscs set */
|
|
|
|
vcpu->stat.instruction_tsch++;
|
|
|
|
/* a valid schid has at least one bit set */
|
|
if (vcpu->run->s.regs.gprs[1])
|
|
inti = kvm_s390_get_io_int(vcpu->kvm, isc_mask,
|
|
vcpu->run->s.regs.gprs[1]);
|
|
|
|
/*
|
|
* Prepare exit to userspace.
|
|
* We indicate whether we dequeued a pending I/O interrupt
|
|
* so that userspace can re-inject it if the instruction gets
|
|
* a program check. While this may re-order the pending I/O
|
|
* interrupts, this is no problem since the priority is kept
|
|
* intact.
|
|
*/
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_TSCH;
|
|
vcpu->run->s390_tsch.dequeued = !!inti;
|
|
if (inti) {
|
|
vcpu->run->s390_tsch.subchannel_id = inti->io.subchannel_id;
|
|
vcpu->run->s390_tsch.subchannel_nr = inti->io.subchannel_nr;
|
|
vcpu->run->s390_tsch.io_int_parm = inti->io.io_int_parm;
|
|
vcpu->run->s390_tsch.io_int_word = inti->io.io_int_word;
|
|
}
|
|
vcpu->run->s390_tsch.ipb = vcpu->arch.sie_block->ipb;
|
|
kfree(inti);
|
|
return -EREMOTE;
|
|
}
|
|
|
|
static int handle_io_inst(struct kvm_vcpu *vcpu)
|
|
{
|
|
VCPU_EVENT(vcpu, 4, "%s", "I/O instruction");
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
if (vcpu->kvm->arch.css_support) {
|
|
/*
|
|
* Most I/O instructions will be handled by userspace.
|
|
* Exceptions are tpi and the interrupt portion of tsch.
|
|
*/
|
|
if (vcpu->arch.sie_block->ipa == 0xb236)
|
|
return handle_tpi(vcpu);
|
|
if (vcpu->arch.sie_block->ipa == 0xb235)
|
|
return handle_tsch(vcpu);
|
|
/* Handle in userspace. */
|
|
vcpu->stat.instruction_io_other++;
|
|
return -EOPNOTSUPP;
|
|
} else {
|
|
/*
|
|
* Set condition code 3 to stop the guest from issuing channel
|
|
* I/O instructions.
|
|
*/
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* handle_pqap: Handling pqap interception
|
|
* @vcpu: the vcpu having issue the pqap instruction
|
|
*
|
|
* We now support PQAP/AQIC instructions and we need to correctly
|
|
* answer the guest even if no dedicated driver's hook is available.
|
|
*
|
|
* The intercepting code calls a dedicated callback for this instruction
|
|
* if a driver did register one in the CRYPTO satellite of the
|
|
* SIE block.
|
|
*
|
|
* If no callback is available, the queues are not available, return this
|
|
* response code to the caller and set CC to 3.
|
|
* Else return the response code returned by the callback.
|
|
*/
|
|
static int handle_pqap(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct ap_queue_status status = {};
|
|
unsigned long reg0;
|
|
int ret;
|
|
uint8_t fc;
|
|
|
|
/* Verify that the AP instruction are available */
|
|
if (!ap_instructions_available())
|
|
return -EOPNOTSUPP;
|
|
/* Verify that the guest is allowed to use AP instructions */
|
|
if (!(vcpu->arch.sie_block->eca & ECA_APIE))
|
|
return -EOPNOTSUPP;
|
|
/*
|
|
* The only possibly intercepted functions when AP instructions are
|
|
* available for the guest are AQIC and TAPQ with the t bit set
|
|
* since we do not set IC.3 (FIII) we currently will only intercept
|
|
* the AQIC function code.
|
|
*/
|
|
reg0 = vcpu->run->s.regs.gprs[0];
|
|
fc = (reg0 >> 24) & 0xff;
|
|
if (WARN_ON_ONCE(fc != 0x03))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* PQAP instruction is allowed for guest kernel only */
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
/* Common PQAP instruction specification exceptions */
|
|
/* bits 41-47 must all be zeros */
|
|
if (reg0 & 0x007f0000UL)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
/* APFT not install and T bit set */
|
|
if (!test_kvm_facility(vcpu->kvm, 15) && (reg0 & 0x00800000UL))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
/* APXA not installed and APID greater 64 or APQI greater 16 */
|
|
if (!(vcpu->kvm->arch.crypto.crycbd & 0x02) && (reg0 & 0x0000c0f0UL))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
/* AQIC function code specific exception */
|
|
/* facility 65 not present for AQIC function code */
|
|
if (!test_kvm_facility(vcpu->kvm, 65))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
/*
|
|
* Verify that the hook callback is registered, lock the owner
|
|
* and call the hook.
|
|
*/
|
|
if (vcpu->kvm->arch.crypto.pqap_hook) {
|
|
if (!try_module_get(vcpu->kvm->arch.crypto.pqap_hook->owner))
|
|
return -EOPNOTSUPP;
|
|
ret = vcpu->kvm->arch.crypto.pqap_hook->hook(vcpu);
|
|
module_put(vcpu->kvm->arch.crypto.pqap_hook->owner);
|
|
if (!ret && vcpu->run->s.regs.gprs[1] & 0x00ff0000)
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
return ret;
|
|
}
|
|
/*
|
|
* A vfio_driver must register a hook.
|
|
* No hook means no driver to enable the SIE CRYCB and no queues.
|
|
* We send this response to the guest.
|
|
*/
|
|
status.response_code = 0x01;
|
|
memcpy(&vcpu->run->s.regs.gprs[1], &status, sizeof(status));
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_stfl(struct kvm_vcpu *vcpu)
|
|
{
|
|
int rc;
|
|
unsigned int fac;
|
|
|
|
vcpu->stat.instruction_stfl++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
/*
|
|
* We need to shift the lower 32 facility bits (bit 0-31) from a u64
|
|
* into a u32 memory representation. They will remain bits 0-31.
|
|
*/
|
|
fac = *vcpu->kvm->arch.model.fac_list >> 32;
|
|
rc = write_guest_lc(vcpu, offsetof(struct lowcore, stfl_fac_list),
|
|
&fac, sizeof(fac));
|
|
if (rc)
|
|
return rc;
|
|
VCPU_EVENT(vcpu, 3, "STFL: store facility list 0x%x", fac);
|
|
trace_kvm_s390_handle_stfl(vcpu, fac);
|
|
return 0;
|
|
}
|
|
|
|
#define PSW_MASK_ADDR_MODE (PSW_MASK_EA | PSW_MASK_BA)
|
|
#define PSW_MASK_UNASSIGNED 0xb80800fe7fffffffUL
|
|
#define PSW_ADDR_24 0x0000000000ffffffUL
|
|
#define PSW_ADDR_31 0x000000007fffffffUL
|
|
|
|
int is_valid_psw(psw_t *psw)
|
|
{
|
|
if (psw->mask & PSW_MASK_UNASSIGNED)
|
|
return 0;
|
|
if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
|
|
if (psw->addr & ~PSW_ADDR_31)
|
|
return 0;
|
|
}
|
|
if (!(psw->mask & PSW_MASK_ADDR_MODE) && (psw->addr & ~PSW_ADDR_24))
|
|
return 0;
|
|
if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
|
|
return 0;
|
|
if (psw->addr & 1)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
|
|
{
|
|
psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
|
|
psw_compat_t new_psw;
|
|
u64 addr;
|
|
int rc;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_lpsw++;
|
|
|
|
if (gpsw->mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
addr = kvm_s390_get_base_disp_s(vcpu, &ar);
|
|
if (addr & 7)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
|
|
if (rc)
|
|
return kvm_s390_inject_prog_cond(vcpu, rc);
|
|
if (!(new_psw.mask & PSW32_MASK_BASE))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
|
|
gpsw->mask |= new_psw.addr & PSW32_ADDR_AMODE;
|
|
gpsw->addr = new_psw.addr & ~PSW32_ADDR_AMODE;
|
|
if (!is_valid_psw(gpsw))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_lpswe(struct kvm_vcpu *vcpu)
|
|
{
|
|
psw_t new_psw;
|
|
u64 addr;
|
|
int rc;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_lpswe++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
addr = kvm_s390_get_base_disp_s(vcpu, &ar);
|
|
if (addr & 7)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
rc = read_guest(vcpu, addr, ar, &new_psw, sizeof(new_psw));
|
|
if (rc)
|
|
return kvm_s390_inject_prog_cond(vcpu, rc);
|
|
vcpu->arch.sie_block->gpsw = new_psw;
|
|
if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_stidp(struct kvm_vcpu *vcpu)
|
|
{
|
|
u64 stidp_data = vcpu->kvm->arch.model.cpuid;
|
|
u64 operand2;
|
|
int rc;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_stidp++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
|
|
|
|
if (operand2 & 7)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
rc = write_guest(vcpu, operand2, ar, &stidp_data, sizeof(stidp_data));
|
|
if (rc)
|
|
return kvm_s390_inject_prog_cond(vcpu, rc);
|
|
|
|
VCPU_EVENT(vcpu, 3, "STIDP: store cpu id 0x%llx", stidp_data);
|
|
return 0;
|
|
}
|
|
|
|
static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
|
|
{
|
|
int cpus = 0;
|
|
int n;
|
|
|
|
cpus = atomic_read(&vcpu->kvm->online_vcpus);
|
|
|
|
/* deal with other level 3 hypervisors */
|
|
if (stsi(mem, 3, 2, 2))
|
|
mem->count = 0;
|
|
if (mem->count < 8)
|
|
mem->count++;
|
|
for (n = mem->count - 1; n > 0 ; n--)
|
|
memcpy(&mem->vm[n], &mem->vm[n - 1], sizeof(mem->vm[0]));
|
|
|
|
memset(&mem->vm[0], 0, sizeof(mem->vm[0]));
|
|
mem->vm[0].cpus_total = cpus;
|
|
mem->vm[0].cpus_configured = cpus;
|
|
mem->vm[0].cpus_standby = 0;
|
|
mem->vm[0].cpus_reserved = 0;
|
|
mem->vm[0].caf = 1000;
|
|
memcpy(mem->vm[0].name, "KVMguest", 8);
|
|
ASCEBC(mem->vm[0].name, 8);
|
|
memcpy(mem->vm[0].cpi, "KVM/Linux ", 16);
|
|
ASCEBC(mem->vm[0].cpi, 16);
|
|
}
|
|
|
|
static void insert_stsi_usr_data(struct kvm_vcpu *vcpu, u64 addr, u8 ar,
|
|
u8 fc, u8 sel1, u16 sel2)
|
|
{
|
|
vcpu->run->exit_reason = KVM_EXIT_S390_STSI;
|
|
vcpu->run->s390_stsi.addr = addr;
|
|
vcpu->run->s390_stsi.ar = ar;
|
|
vcpu->run->s390_stsi.fc = fc;
|
|
vcpu->run->s390_stsi.sel1 = sel1;
|
|
vcpu->run->s390_stsi.sel2 = sel2;
|
|
}
|
|
|
|
static int handle_stsi(struct kvm_vcpu *vcpu)
|
|
{
|
|
int fc = (vcpu->run->s.regs.gprs[0] & 0xf0000000) >> 28;
|
|
int sel1 = vcpu->run->s.regs.gprs[0] & 0xff;
|
|
int sel2 = vcpu->run->s.regs.gprs[1] & 0xffff;
|
|
unsigned long mem = 0;
|
|
u64 operand2;
|
|
int rc = 0;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_stsi++;
|
|
VCPU_EVENT(vcpu, 3, "STSI: fc: %u sel1: %u sel2: %u", fc, sel1, sel2);
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
if (fc > 3) {
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
return 0;
|
|
}
|
|
|
|
if (vcpu->run->s.regs.gprs[0] & 0x0fffff00
|
|
|| vcpu->run->s.regs.gprs[1] & 0xffff0000)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
if (fc == 0) {
|
|
vcpu->run->s.regs.gprs[0] = 3 << 28;
|
|
kvm_s390_set_psw_cc(vcpu, 0);
|
|
return 0;
|
|
}
|
|
|
|
operand2 = kvm_s390_get_base_disp_s(vcpu, &ar);
|
|
|
|
if (operand2 & 0xfff)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
switch (fc) {
|
|
case 1: /* same handling for 1 and 2 */
|
|
case 2:
|
|
mem = get_zeroed_page(GFP_KERNEL);
|
|
if (!mem)
|
|
goto out_no_data;
|
|
if (stsi((void *) mem, fc, sel1, sel2))
|
|
goto out_no_data;
|
|
break;
|
|
case 3:
|
|
if (sel1 != 2 || sel2 != 2)
|
|
goto out_no_data;
|
|
mem = get_zeroed_page(GFP_KERNEL);
|
|
if (!mem)
|
|
goto out_no_data;
|
|
handle_stsi_3_2_2(vcpu, (void *) mem);
|
|
break;
|
|
}
|
|
|
|
rc = write_guest(vcpu, operand2, ar, (void *)mem, PAGE_SIZE);
|
|
if (rc) {
|
|
rc = kvm_s390_inject_prog_cond(vcpu, rc);
|
|
goto out;
|
|
}
|
|
if (vcpu->kvm->arch.user_stsi) {
|
|
insert_stsi_usr_data(vcpu, operand2, ar, fc, sel1, sel2);
|
|
rc = -EREMOTE;
|
|
}
|
|
trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
|
|
free_page(mem);
|
|
kvm_s390_set_psw_cc(vcpu, 0);
|
|
vcpu->run->s.regs.gprs[0] = 0;
|
|
return rc;
|
|
out_no_data:
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
out:
|
|
free_page(mem);
|
|
return rc;
|
|
}
|
|
|
|
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu)
|
|
{
|
|
switch (vcpu->arch.sie_block->ipa & 0x00ff) {
|
|
case 0x02:
|
|
return handle_stidp(vcpu);
|
|
case 0x04:
|
|
return handle_set_clock(vcpu);
|
|
case 0x10:
|
|
return handle_set_prefix(vcpu);
|
|
case 0x11:
|
|
return handle_store_prefix(vcpu);
|
|
case 0x12:
|
|
return handle_store_cpu_address(vcpu);
|
|
case 0x14:
|
|
return kvm_s390_handle_vsie(vcpu);
|
|
case 0x21:
|
|
case 0x50:
|
|
return handle_ipte_interlock(vcpu);
|
|
case 0x29:
|
|
return handle_iske(vcpu);
|
|
case 0x2a:
|
|
return handle_rrbe(vcpu);
|
|
case 0x2b:
|
|
return handle_sske(vcpu);
|
|
case 0x2c:
|
|
return handle_test_block(vcpu);
|
|
case 0x30:
|
|
case 0x31:
|
|
case 0x32:
|
|
case 0x33:
|
|
case 0x34:
|
|
case 0x35:
|
|
case 0x36:
|
|
case 0x37:
|
|
case 0x38:
|
|
case 0x39:
|
|
case 0x3a:
|
|
case 0x3b:
|
|
case 0x3c:
|
|
case 0x5f:
|
|
case 0x74:
|
|
case 0x76:
|
|
return handle_io_inst(vcpu);
|
|
case 0x56:
|
|
return handle_sthyi(vcpu);
|
|
case 0x7d:
|
|
return handle_stsi(vcpu);
|
|
case 0xaf:
|
|
return handle_pqap(vcpu);
|
|
case 0xb1:
|
|
return handle_stfl(vcpu);
|
|
case 0xb2:
|
|
return handle_lpswe(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int handle_epsw(struct kvm_vcpu *vcpu)
|
|
{
|
|
int reg1, reg2;
|
|
|
|
vcpu->stat.instruction_epsw++;
|
|
|
|
kvm_s390_get_regs_rre(vcpu, ®1, ®2);
|
|
|
|
/* This basically extracts the mask half of the psw. */
|
|
vcpu->run->s.regs.gprs[reg1] &= 0xffffffff00000000UL;
|
|
vcpu->run->s.regs.gprs[reg1] |= vcpu->arch.sie_block->gpsw.mask >> 32;
|
|
if (reg2) {
|
|
vcpu->run->s.regs.gprs[reg2] &= 0xffffffff00000000UL;
|
|
vcpu->run->s.regs.gprs[reg2] |=
|
|
vcpu->arch.sie_block->gpsw.mask & 0x00000000ffffffffUL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define PFMF_RESERVED 0xfffc0101UL
|
|
#define PFMF_SK 0x00020000UL
|
|
#define PFMF_CF 0x00010000UL
|
|
#define PFMF_UI 0x00008000UL
|
|
#define PFMF_FSC 0x00007000UL
|
|
#define PFMF_NQ 0x00000800UL
|
|
#define PFMF_MR 0x00000400UL
|
|
#define PFMF_MC 0x00000200UL
|
|
#define PFMF_KEY 0x000000feUL
|
|
|
|
static int handle_pfmf(struct kvm_vcpu *vcpu)
|
|
{
|
|
bool mr = false, mc = false, nq;
|
|
int reg1, reg2;
|
|
unsigned long start, end;
|
|
unsigned char key;
|
|
|
|
vcpu->stat.instruction_pfmf++;
|
|
|
|
kvm_s390_get_regs_rre(vcpu, ®1, ®2);
|
|
|
|
if (!test_kvm_facility(vcpu->kvm, 8))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_RESERVED)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
/* Only provide non-quiescing support if enabled for the guest */
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_NQ &&
|
|
!test_kvm_facility(vcpu->kvm, 14))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
/* Only provide conditional-SSKE support if enabled for the guest */
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK &&
|
|
test_kvm_facility(vcpu->kvm, 10)) {
|
|
mr = vcpu->run->s.regs.gprs[reg1] & PFMF_MR;
|
|
mc = vcpu->run->s.regs.gprs[reg1] & PFMF_MC;
|
|
}
|
|
|
|
nq = vcpu->run->s.regs.gprs[reg1] & PFMF_NQ;
|
|
key = vcpu->run->s.regs.gprs[reg1] & PFMF_KEY;
|
|
start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
|
|
start = kvm_s390_logical_to_effective(vcpu, start);
|
|
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
|
|
if (kvm_s390_check_low_addr_prot_real(vcpu, start))
|
|
return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
|
|
}
|
|
|
|
switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
|
|
case 0x00000000:
|
|
/* only 4k frames specify a real address */
|
|
start = kvm_s390_real_to_abs(vcpu, start);
|
|
end = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
|
|
break;
|
|
case 0x00001000:
|
|
end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
|
|
break;
|
|
case 0x00002000:
|
|
/* only support 2G frame size if EDAT2 is available and we are
|
|
not in 24-bit addressing mode */
|
|
if (!test_kvm_facility(vcpu->kvm, 78) ||
|
|
psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_24BIT)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
end = (start + _REGION3_SIZE) & ~(_REGION3_SIZE - 1);
|
|
break;
|
|
default:
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
}
|
|
|
|
while (start != end) {
|
|
unsigned long vmaddr;
|
|
bool unlocked = false;
|
|
|
|
/* Translate guest address to host address */
|
|
vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
|
|
if (kvm_is_error_hva(vmaddr))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
|
|
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
|
|
if (kvm_clear_guest(vcpu->kvm, start, PAGE_SIZE))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
|
|
}
|
|
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
|
|
int rc = kvm_s390_skey_check_enable(vcpu);
|
|
|
|
if (rc)
|
|
return rc;
|
|
down_read(¤t->mm->mmap_sem);
|
|
rc = cond_set_guest_storage_key(current->mm, vmaddr,
|
|
key, NULL, nq, mr, mc);
|
|
if (rc < 0) {
|
|
rc = fixup_user_fault(current, current->mm, vmaddr,
|
|
FAULT_FLAG_WRITE, &unlocked);
|
|
rc = !rc ? -EAGAIN : rc;
|
|
}
|
|
up_read(¤t->mm->mmap_sem);
|
|
if (rc == -EFAULT)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
|
|
if (rc == -EAGAIN)
|
|
continue;
|
|
if (rc < 0)
|
|
return rc;
|
|
}
|
|
start += PAGE_SIZE;
|
|
}
|
|
if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
|
|
if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT) {
|
|
vcpu->run->s.regs.gprs[reg2] = end;
|
|
} else {
|
|
vcpu->run->s.regs.gprs[reg2] &= ~0xffffffffUL;
|
|
end = kvm_s390_logical_to_effective(vcpu, end);
|
|
vcpu->run->s.regs.gprs[reg2] |= end;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Must be called with relevant read locks held (kvm->mm->mmap_sem, kvm->srcu)
|
|
*/
|
|
static inline int __do_essa(struct kvm_vcpu *vcpu, const int orc)
|
|
{
|
|
int r1, r2, nappended, entries;
|
|
unsigned long gfn, hva, res, pgstev, ptev;
|
|
unsigned long *cbrlo;
|
|
|
|
/*
|
|
* We don't need to set SD.FPF.SK to 1 here, because if we have a
|
|
* machine check here we either handle it or crash
|
|
*/
|
|
|
|
kvm_s390_get_regs_rre(vcpu, &r1, &r2);
|
|
gfn = vcpu->run->s.regs.gprs[r2] >> PAGE_SHIFT;
|
|
hva = gfn_to_hva(vcpu->kvm, gfn);
|
|
entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
|
|
|
|
if (kvm_is_error_hva(hva))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
|
|
|
|
nappended = pgste_perform_essa(vcpu->kvm->mm, hva, orc, &ptev, &pgstev);
|
|
if (nappended < 0) {
|
|
res = orc ? 0x10 : 0;
|
|
vcpu->run->s.regs.gprs[r1] = res; /* Exception Indication */
|
|
return 0;
|
|
}
|
|
res = (pgstev & _PGSTE_GPS_USAGE_MASK) >> 22;
|
|
/*
|
|
* Set the block-content state part of the result. 0 means resident, so
|
|
* nothing to do if the page is valid. 2 is for preserved pages
|
|
* (non-present and non-zero), and 3 for zero pages (non-present and
|
|
* zero).
|
|
*/
|
|
if (ptev & _PAGE_INVALID) {
|
|
res |= 2;
|
|
if (pgstev & _PGSTE_GPS_ZERO)
|
|
res |= 1;
|
|
}
|
|
if (pgstev & _PGSTE_GPS_NODAT)
|
|
res |= 0x20;
|
|
vcpu->run->s.regs.gprs[r1] = res;
|
|
/*
|
|
* It is possible that all the normal 511 slots were full, in which case
|
|
* we will now write in the 512th slot, which is reserved for host use.
|
|
* In both cases we let the normal essa handling code process all the
|
|
* slots, including the reserved one, if needed.
|
|
*/
|
|
if (nappended > 0) {
|
|
cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo & PAGE_MASK);
|
|
cbrlo[entries] = gfn << PAGE_SHIFT;
|
|
}
|
|
|
|
if (orc) {
|
|
struct kvm_memory_slot *ms = gfn_to_memslot(vcpu->kvm, gfn);
|
|
|
|
/* Increment only if we are really flipping the bit */
|
|
if (ms && !test_and_set_bit(gfn - ms->base_gfn, kvm_second_dirty_bitmap(ms)))
|
|
atomic64_inc(&vcpu->kvm->arch.cmma_dirty_pages);
|
|
}
|
|
|
|
return nappended;
|
|
}
|
|
|
|
static int handle_essa(struct kvm_vcpu *vcpu)
|
|
{
|
|
/* entries expected to be 1FF */
|
|
int entries = (vcpu->arch.sie_block->cbrlo & ~PAGE_MASK) >> 3;
|
|
unsigned long *cbrlo;
|
|
struct gmap *gmap;
|
|
int i, orc;
|
|
|
|
VCPU_EVENT(vcpu, 4, "ESSA: release %d pages", entries);
|
|
gmap = vcpu->arch.gmap;
|
|
vcpu->stat.instruction_essa++;
|
|
if (!vcpu->kvm->arch.use_cmma)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
/* Check for invalid operation request code */
|
|
orc = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
|
|
/* ORCs 0-6 are always valid */
|
|
if (orc > (test_kvm_facility(vcpu->kvm, 147) ? ESSA_SET_STABLE_NODAT
|
|
: ESSA_SET_STABLE_IF_RESIDENT))
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
if (!vcpu->kvm->arch.migration_mode) {
|
|
/*
|
|
* CMMA is enabled in the KVM settings, but is disabled in
|
|
* the SIE block and in the mm_context, and we are not doing
|
|
* a migration. Enable CMMA in the mm_context.
|
|
* Since we need to take a write lock to write to the context
|
|
* to avoid races with storage keys handling, we check if the
|
|
* value really needs to be written to; if the value is
|
|
* already correct, we do nothing and avoid the lock.
|
|
*/
|
|
if (vcpu->kvm->mm->context.uses_cmm == 0) {
|
|
down_write(&vcpu->kvm->mm->mmap_sem);
|
|
vcpu->kvm->mm->context.uses_cmm = 1;
|
|
up_write(&vcpu->kvm->mm->mmap_sem);
|
|
}
|
|
/*
|
|
* If we are here, we are supposed to have CMMA enabled in
|
|
* the SIE block. Enabling CMMA works on a per-CPU basis,
|
|
* while the context use_cmma flag is per process.
|
|
* It's possible that the context flag is enabled and the
|
|
* SIE flag is not, so we set the flag always; if it was
|
|
* already set, nothing changes, otherwise we enable it
|
|
* on this CPU too.
|
|
*/
|
|
vcpu->arch.sie_block->ecb2 |= ECB2_CMMA;
|
|
/* Retry the ESSA instruction */
|
|
kvm_s390_retry_instr(vcpu);
|
|
} else {
|
|
int srcu_idx;
|
|
|
|
down_read(&vcpu->kvm->mm->mmap_sem);
|
|
srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
|
|
i = __do_essa(vcpu, orc);
|
|
srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
|
|
up_read(&vcpu->kvm->mm->mmap_sem);
|
|
if (i < 0)
|
|
return i;
|
|
/* Account for the possible extra cbrl entry */
|
|
entries += i;
|
|
}
|
|
vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */
|
|
cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo);
|
|
down_read(&gmap->mm->mmap_sem);
|
|
for (i = 0; i < entries; ++i)
|
|
__gmap_zap(gmap, cbrlo[i]);
|
|
up_read(&gmap->mm->mmap_sem);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_handle_b9(struct kvm_vcpu *vcpu)
|
|
{
|
|
switch (vcpu->arch.sie_block->ipa & 0x00ff) {
|
|
case 0x8a:
|
|
case 0x8e:
|
|
case 0x8f:
|
|
return handle_ipte_interlock(vcpu);
|
|
case 0x8d:
|
|
return handle_epsw(vcpu);
|
|
case 0xab:
|
|
return handle_essa(vcpu);
|
|
case 0xaf:
|
|
return handle_pfmf(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
|
|
{
|
|
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
|
|
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
|
|
int reg, rc, nr_regs;
|
|
u32 ctl_array[16];
|
|
u64 ga;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_lctl++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
|
|
|
|
if (ga & 3)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
VCPU_EVENT(vcpu, 4, "LCTL: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
|
|
trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
|
|
|
|
nr_regs = ((reg3 - reg1) & 0xf) + 1;
|
|
rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
|
|
if (rc)
|
|
return kvm_s390_inject_prog_cond(vcpu, rc);
|
|
reg = reg1;
|
|
nr_regs = 0;
|
|
do {
|
|
vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
|
|
vcpu->arch.sie_block->gcr[reg] |= ctl_array[nr_regs++];
|
|
if (reg == reg3)
|
|
break;
|
|
reg = (reg + 1) % 16;
|
|
} while (1);
|
|
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
|
|
{
|
|
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
|
|
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
|
|
int reg, rc, nr_regs;
|
|
u32 ctl_array[16];
|
|
u64 ga;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_stctl++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
ga = kvm_s390_get_base_disp_rs(vcpu, &ar);
|
|
|
|
if (ga & 3)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
VCPU_EVENT(vcpu, 4, "STCTL r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
|
|
trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
|
|
|
|
reg = reg1;
|
|
nr_regs = 0;
|
|
do {
|
|
ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
|
|
if (reg == reg3)
|
|
break;
|
|
reg = (reg + 1) % 16;
|
|
} while (1);
|
|
rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u32));
|
|
return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
|
|
}
|
|
|
|
static int handle_lctlg(struct kvm_vcpu *vcpu)
|
|
{
|
|
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
|
|
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
|
|
int reg, rc, nr_regs;
|
|
u64 ctl_array[16];
|
|
u64 ga;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_lctlg++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
|
|
|
|
if (ga & 7)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
VCPU_EVENT(vcpu, 4, "LCTLG: r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
|
|
trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
|
|
|
|
nr_regs = ((reg3 - reg1) & 0xf) + 1;
|
|
rc = read_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
|
|
if (rc)
|
|
return kvm_s390_inject_prog_cond(vcpu, rc);
|
|
reg = reg1;
|
|
nr_regs = 0;
|
|
do {
|
|
vcpu->arch.sie_block->gcr[reg] = ctl_array[nr_regs++];
|
|
if (reg == reg3)
|
|
break;
|
|
reg = (reg + 1) % 16;
|
|
} while (1);
|
|
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
|
|
return 0;
|
|
}
|
|
|
|
static int handle_stctg(struct kvm_vcpu *vcpu)
|
|
{
|
|
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
|
|
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
|
|
int reg, rc, nr_regs;
|
|
u64 ctl_array[16];
|
|
u64 ga;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_stctg++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
ga = kvm_s390_get_base_disp_rsy(vcpu, &ar);
|
|
|
|
if (ga & 7)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
|
|
|
|
VCPU_EVENT(vcpu, 4, "STCTG r1:%d, r3:%d, addr: 0x%llx", reg1, reg3, ga);
|
|
trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
|
|
|
|
reg = reg1;
|
|
nr_regs = 0;
|
|
do {
|
|
ctl_array[nr_regs++] = vcpu->arch.sie_block->gcr[reg];
|
|
if (reg == reg3)
|
|
break;
|
|
reg = (reg + 1) % 16;
|
|
} while (1);
|
|
rc = write_guest(vcpu, ga, ar, ctl_array, nr_regs * sizeof(u64));
|
|
return rc ? kvm_s390_inject_prog_cond(vcpu, rc) : 0;
|
|
}
|
|
|
|
int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
|
|
{
|
|
switch (vcpu->arch.sie_block->ipb & 0x000000ff) {
|
|
case 0x25:
|
|
return handle_stctg(vcpu);
|
|
case 0x2f:
|
|
return handle_lctlg(vcpu);
|
|
case 0x60:
|
|
case 0x61:
|
|
case 0x62:
|
|
return handle_ri(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int handle_tprot(struct kvm_vcpu *vcpu)
|
|
{
|
|
u64 address1, address2;
|
|
unsigned long hva, gpa;
|
|
int ret = 0, cc = 0;
|
|
bool writable;
|
|
u8 ar;
|
|
|
|
vcpu->stat.instruction_tprot++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
kvm_s390_get_base_disp_sse(vcpu, &address1, &address2, &ar, NULL);
|
|
|
|
/* we only handle the Linux memory detection case:
|
|
* access key == 0
|
|
* everything else goes to userspace. */
|
|
if (address2 & 0xf0)
|
|
return -EOPNOTSUPP;
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
|
|
ipte_lock(vcpu);
|
|
ret = guest_translate_address(vcpu, address1, ar, &gpa, GACC_STORE);
|
|
if (ret == PGM_PROTECTION) {
|
|
/* Write protected? Try again with read-only... */
|
|
cc = 1;
|
|
ret = guest_translate_address(vcpu, address1, ar, &gpa,
|
|
GACC_FETCH);
|
|
}
|
|
if (ret) {
|
|
if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
|
|
ret = kvm_s390_inject_program_int(vcpu, ret);
|
|
} else if (ret > 0) {
|
|
/* Translation not available */
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
ret = 0;
|
|
}
|
|
goto out_unlock;
|
|
}
|
|
|
|
hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
|
|
if (kvm_is_error_hva(hva)) {
|
|
ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
|
|
} else {
|
|
if (!writable)
|
|
cc = 1; /* Write not permitted ==> read-only */
|
|
kvm_s390_set_psw_cc(vcpu, cc);
|
|
/* Note: CC2 only occurs for storage keys (not supported yet) */
|
|
}
|
|
out_unlock:
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
|
|
ipte_unlock(vcpu);
|
|
return ret;
|
|
}
|
|
|
|
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
|
|
{
|
|
switch (vcpu->arch.sie_block->ipa & 0x00ff) {
|
|
case 0x01:
|
|
return handle_tprot(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static int handle_sckpf(struct kvm_vcpu *vcpu)
|
|
{
|
|
u32 value;
|
|
|
|
vcpu->stat.instruction_sckpf++;
|
|
|
|
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
|
|
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
|
|
|
|
if (vcpu->run->s.regs.gprs[0] & 0x00000000ffff0000)
|
|
return kvm_s390_inject_program_int(vcpu,
|
|
PGM_SPECIFICATION);
|
|
|
|
value = vcpu->run->s.regs.gprs[0] & 0x000000000000ffff;
|
|
vcpu->arch.sie_block->todpr = value;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int handle_ptff(struct kvm_vcpu *vcpu)
|
|
{
|
|
vcpu->stat.instruction_ptff++;
|
|
|
|
/* we don't emulate any control instructions yet */
|
|
kvm_s390_set_psw_cc(vcpu, 3);
|
|
return 0;
|
|
}
|
|
|
|
int kvm_s390_handle_01(struct kvm_vcpu *vcpu)
|
|
{
|
|
switch (vcpu->arch.sie_block->ipa & 0x00ff) {
|
|
case 0x04:
|
|
return handle_ptff(vcpu);
|
|
case 0x07:
|
|
return handle_sckpf(vcpu);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|