C++ (Cpp) trace_kvm_s390_handle_stsi示例

示例#1

文件： priv.c 项目： AiWinters/linux

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;
	u64 operand2;
	unsigned long mem;

	vcpu->stat.instruction_stsi++;
	VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", fc, sel1, sel2);

	operand2 = kvm_s390_get_base_disp_s(vcpu);

	if (operand2 & 0xfff && fc > 0)
		return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

	switch (fc) {
	case 0:
		vcpu->run->s.regs.gprs[0] = 3 << 28;
		vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
		return 0;
	case 1: /* same handling for 1 and 2 */
	case 2:
		mem = get_zeroed_page(GFP_KERNEL);
		if (!mem)
			goto out_fail;
		if (stsi((void *) mem, fc, sel1, sel2))
			goto out_mem;
		break;
	case 3:
		if (sel1 != 2 || sel2 != 2)
			goto out_fail;
		mem = get_zeroed_page(GFP_KERNEL);
		if (!mem)
			goto out_fail;
		handle_stsi_3_2_2(vcpu, (void *) mem);
		break;
	default:
		goto out_fail;
	}

	if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
		kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
		goto out_mem;
	}
	trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
	free_page(mem);
	vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
	vcpu->run->s.regs.gprs[0] = 0;
	return 0;
out_mem:
	free_page(mem);
out_fail:
	/* condition code 3 */
	vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
	return 0;
}

示例#2

文件： priv.c 项目： 59psi/linux

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;

	vcpu->stat.instruction_stsi++;
	VCPU_EVENT(vcpu, 4, "stsi: fc: %x sel1: %x sel2: %x", 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) {
		vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;	  /* cc 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;
		vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);  /* cc 0 */
		return 0;
	}

	operand2 = kvm_s390_get_base_disp_s(vcpu);

	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;
	}

	if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
		rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
		goto out_exception;
	}
	trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
	free_page(mem);
	vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
	vcpu->run->s.regs.gprs[0] = 0;
	return 0;
out_no_data:
	/* condition code 3 */
	vcpu->arch.sie_block->gpsw.mask |= 3ul << 44;
out_exception:
	free_page(mem);
	return rc;
}