arch/s390/kvm/interrupt.c

Source file repositories/reference/linux-study-clean/arch/s390/kvm/interrupt.c

File Facts

System
Linux kernel
Corpus path
arch/s390/kvm/interrupt.c
Extension
.c
Size
103676 bytes
Lines
3793
Domain
Architecture Layer
Bucket
arch/s390
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (lc) {
		case 0:
		case 10:
			ext_sa_addr &= ~0x3ffUL;
			break;
		case 11:
			ext_sa_addr &= ~0x7ffUL;
			break;
		case 12:
			ext_sa_addr &= ~0xfffUL;
			break;
		default:
			ext_sa_addr = 0;
			break;
		}
	} else {
		ext_sa_addr &= ~0x3ffUL;
	}

	if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
		if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
				    512))
			mci.vr = 0;
	} else {
		mci.vr = 0;
	}
	if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
	    && (lc == 11 || lc == 12)) {
		if (write_guest_abs(vcpu, ext_sa_addr + 1024,
				    &vcpu->run->s.regs.gscb, 32))
			mci.gs = 0;
	} else {
		mci.gs = 0;
	}

	/* General interruption information */
	rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
	rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
			     &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
	rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
			    &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
	rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE);

	/* Register-save areas */
	if (cpu_has_vx()) {
		convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs);
		rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128);
	} else {
		rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA,
				     vcpu->run->s.regs.fprs, 128);
	}
	rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA,
			     vcpu->run->s.regs.gprs, 128);
	rc |= put_guest_lc(vcpu, vcpu->run->s.regs.fpc,
			   (u32 __user *) __LC_FP_CREG_SAVE_AREA);
	rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr,
			   (u32 __user *) __LC_TOD_PROGREG_SAVE_AREA);
	rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu),
			   (u64 __user *) __LC_CPU_TIMER_SAVE_AREA);
	rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8,
			   (u64 __user *) __LC_CLOCK_COMP_SAVE_AREA);
	rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA,
			     &vcpu->run->s.regs.acrs, 64);
	rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA,
			     &vcpu->arch.sie_block->gcr, 128);

	/* Extended interruption information */
	rc |= put_guest_lc(vcpu, mchk->ext_damage_code,
			   (u32 __user *) __LC_EXT_DAMAGE_CODE);
	rc |= put_guest_lc(vcpu, mchk->failing_storage_address,
			   (u64 __user *) __LC_MCCK_FAIL_STOR_ADDR);
	rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout,
			     sizeof(mchk->fixed_logout));
	return rc ? -EFAULT : 0;
}

static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu)
{
	struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int;
	struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
	struct kvm_s390_mchk_info mchk = {};
	int deliver = 0;
	int rc = 0;
	unsigned long flags;

	spin_lock_irqsave(&fi->lock, flags);
	spin_lock(&li->lock);
	if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
	    test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) {
		/*

Annotation

Implementation Notes