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This patch enables transactional execution for KVM guests on s390 systems zec12 or later. We rework the allocation of the page containing the sie_block to also back the Interception Transaction Diagnostic Block. If available the TE facilities will be enabled. Setting bit 73 and 50 in vfacilities bitmask reveals the HW facilities Transactional Memory and Constraint Transactional Memory respectively to the KVM guest. Furthermore, the patch restores the Program-Interruption TDB from the Interception TDB in case a program interception has occurred and the ITDB has a valid format. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
163 lines
5.2 KiB
C
163 lines
5.2 KiB
C
/*
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* definition for kvm on s390
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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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* Christian Ehrhardt <ehrhardt@de.ibm.com>
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*/
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#ifndef ARCH_S390_KVM_S390_H
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#define ARCH_S390_KVM_S390_H
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#include <linux/hrtimer.h>
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#include <linux/kvm.h>
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#include <linux/kvm_host.h>
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typedef int (*intercept_handler_t)(struct kvm_vcpu *vcpu);
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/* declare vfacilities extern */
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extern unsigned long *vfacilities;
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int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
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/* Transactional Memory Execution related macros */
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#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
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#define TDB_ADDR 0x1800UL
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#define TDB_FORMAT1 1
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#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
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#define VM_EVENT(d_kvm, d_loglevel, d_string, d_args...)\
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do { \
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debug_sprintf_event(d_kvm->arch.dbf, d_loglevel, d_string "\n", \
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d_args); \
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} while (0)
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#define VCPU_EVENT(d_vcpu, d_loglevel, d_string, d_args...)\
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do { \
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debug_sprintf_event(d_vcpu->kvm->arch.dbf, d_loglevel, \
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"%02d[%016lx-%016lx]: " d_string "\n", d_vcpu->vcpu_id, \
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d_vcpu->arch.sie_block->gpsw.mask, d_vcpu->arch.sie_block->gpsw.addr,\
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d_args); \
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} while (0)
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static inline int __cpu_is_stopped(struct kvm_vcpu *vcpu)
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{
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return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOP_INT;
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}
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static inline int kvm_is_ucontrol(struct kvm *kvm)
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{
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#ifdef CONFIG_KVM_S390_UCONTROL
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if (kvm->arch.gmap)
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return 0;
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return 1;
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#else
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return 0;
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#endif
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}
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static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
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{
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vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
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vcpu->arch.sie_block->ihcpu = 0xffff;
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kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
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}
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static inline u64 kvm_s390_get_base_disp_s(struct kvm_vcpu *vcpu)
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{
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u32 base2 = vcpu->arch.sie_block->ipb >> 28;
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u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
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return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
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}
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static inline void kvm_s390_get_base_disp_sse(struct kvm_vcpu *vcpu,
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u64 *address1, u64 *address2)
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{
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u32 base1 = (vcpu->arch.sie_block->ipb & 0xf0000000) >> 28;
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u32 disp1 = (vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16;
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u32 base2 = (vcpu->arch.sie_block->ipb & 0xf000) >> 12;
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u32 disp2 = vcpu->arch.sie_block->ipb & 0x0fff;
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*address1 = (base1 ? vcpu->run->s.regs.gprs[base1] : 0) + disp1;
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*address2 = (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
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}
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static inline void kvm_s390_get_regs_rre(struct kvm_vcpu *vcpu, int *r1, int *r2)
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{
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if (r1)
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*r1 = (vcpu->arch.sie_block->ipb & 0x00f00000) >> 20;
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if (r2)
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*r2 = (vcpu->arch.sie_block->ipb & 0x000f0000) >> 16;
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}
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static inline u64 kvm_s390_get_base_disp_rsy(struct kvm_vcpu *vcpu)
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{
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u32 base2 = vcpu->arch.sie_block->ipb >> 28;
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u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16) +
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((vcpu->arch.sie_block->ipb & 0xff00) << 4);
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/* The displacement is a 20bit _SIGNED_ value */
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if (disp2 & 0x80000)
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disp2+=0xfff00000;
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return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + (long)(int)disp2;
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}
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static inline u64 kvm_s390_get_base_disp_rs(struct kvm_vcpu *vcpu)
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{
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u32 base2 = vcpu->arch.sie_block->ipb >> 28;
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u32 disp2 = ((vcpu->arch.sie_block->ipb & 0x0fff0000) >> 16);
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return (base2 ? vcpu->run->s.regs.gprs[base2] : 0) + disp2;
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}
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/* Set the condition code in the guest program status word */
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static inline void kvm_s390_set_psw_cc(struct kvm_vcpu *vcpu, unsigned long cc)
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{
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vcpu->arch.sie_block->gpsw.mask &= ~(3UL << 44);
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vcpu->arch.sie_block->gpsw.mask |= cc << 44;
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}
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int kvm_s390_handle_wait(struct kvm_vcpu *vcpu);
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enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer);
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void kvm_s390_tasklet(unsigned long parm);
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void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
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void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
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int __must_check kvm_s390_inject_vm(struct kvm *kvm,
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struct kvm_s390_interrupt *s390int);
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int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
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struct kvm_s390_interrupt *s390int);
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int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
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struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
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u64 cr6, u64 schid);
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/* implemented in priv.c */
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int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
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int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
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/* implemented in sigp.c */
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int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
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/* implemented in kvm-s390.c */
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int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
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int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
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void s390_vcpu_block(struct kvm_vcpu *vcpu);
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void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
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void exit_sie(struct kvm_vcpu *vcpu);
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void exit_sie_sync(struct kvm_vcpu *vcpu);
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/* implemented in diag.c */
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int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
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#endif
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