Commit 0c6294d9 authored by Janosch Frank's avatar Janosch Frank Committed by Christian Borntraeger
Browse files

KVM: s390: selftests: Add IRQ routing address offset tests 



This test tries to setup routes which have address + offset
combinations which cross a page.

Reviewed-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Tested-by: default avatarMatthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: default avatarJanosch Frank <frankja@linux.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@linux.ibm.com>
parent dcf96f7a

tools/testing/selftests/kvm/Makefile.kvm

+1 −0
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ TEST_GEN_PROGS_s390 += s390/ucontrol_test 
TEST_GEN_PROGS_s390 += s390/user_operexec

TEST_GEN_PROGS_s390 += s390/keyop

TEST_GEN_PROGS_s390 += rseq_test

TEST_GEN_PROGS_s390 += s390/irq_routing



TEST_GEN_PROGS_riscv = $(TEST_GEN_PROGS_COMMON)

TEST_GEN_PROGS_riscv += riscv/sbi_pmu_test

tools/testing/selftests/kvm/s390/irq_routing.c

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+75 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * IRQ routing offset tests.

 *

 * Copyright IBM Corp. 2026

 *

 * Authors:

 *  Janosch Frank <frankja@linux.ibm.com>

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <sys/ioctl.h>



#include "test_util.h"

#include "kvm_util.h"

#include "kselftest.h"

#include "ucall_common.h"



extern char guest_code[];

asm("guest_code:\n"

    "diag %r0,%r0,0\n"

    "j .\n");



static void test(void)

{

	struct kvm_irq_routing *routing;

	struct kvm_vcpu *vcpu;

	struct kvm_vm *vm;

	vm_paddr_t mem;

	int ret;



	struct kvm_irq_routing_entry ue = {

		.type = KVM_IRQ_ROUTING_S390_ADAPTER,

		.gsi = 1,

	};



	vm = vm_create_with_one_vcpu(&vcpu, guest_code);

	mem = vm_phy_pages_alloc(vm, 2, 4096 * 42, 0);



	routing = kvm_gsi_routing_create();

	routing->nr = 1;

	routing->entries[0] = ue;

	routing->entries[0].u.adapter.summary_addr = (uintptr_t)mem;

	routing->entries[0].u.adapter.ind_addr = (uintptr_t)mem;



	routing->entries[0].u.adapter.summary_offset = 4096 * 8;

	ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);

	ksft_test_result(ret == -1 && errno == EINVAL, "summary offset outside of page\n");



	routing->entries[0].u.adapter.summary_offset -= 4;

	ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);

	ksft_test_result(ret == 0, "summary offset inside of page\n");



	routing->entries[0].u.adapter.ind_offset = 4096 * 8;

	ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);

	ksft_test_result(ret == -1 && errno == EINVAL, "ind offset outside of page\n");



	routing->entries[0].u.adapter.ind_offset -= 4;

	ret = __vm_ioctl(vm, KVM_SET_GSI_ROUTING, routing);

	ksft_test_result(ret == 0, "ind offset inside of page\n");



	kvm_vm_free(vm);

}



int main(int argc, char *argv[])

{

	TEST_REQUIRE(kvm_has_cap(KVM_CAP_IRQ_ROUTING));



	ksft_print_header();

	ksft_set_plan(4);

	test();



	ksft_finished();	/* Print results and exit() accordingly */

}