Commit 0f90fa6e authored by Bibo Mao's avatar Bibo Mao Committed by Huacai Chen
Browse files

KVM: LoongArch: selftests: Add time counter test case 



With time counter test, it is to verify that time count starts from 0
and always grows up then.

Signed-off-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 4e882409

tools/testing/selftests/kvm/lib/loongarch/processor.c

+9 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
#include <assert.h>

#include <linux/compiler.h>



#include <asm/kvm.h>

#include "kvm_util.h"

#include "processor.h"

#include "ucall_common.h"
@@ -245,6 +246,11 @@ void vcpu_args_set(struct kvm_vcpu *vcpu, unsigned int num, ...) 
	vcpu_regs_set(vcpu, &regs);

}



static void loongarch_set_reg(struct kvm_vcpu *vcpu, uint64_t id, uint64_t val)

{

	__vcpu_set_reg(vcpu, id, val);

}



static void loongarch_get_csr(struct kvm_vcpu *vcpu, uint64_t id, void *addr)

{

	uint64_t csrid;
@@ -285,7 +291,10 @@ static void loongarch_vcpu_setup(struct kvm_vcpu *vcpu) 
	loongarch_set_csr(vcpu, LOONGARCH_CSR_TCFG, 0);

	loongarch_set_csr(vcpu, LOONGARCH_CSR_ASID, 1);



	/* time count start from 0 */

	val = 0;

	loongarch_set_reg(vcpu, KVM_REG_LOONGARCH_COUNTER, val);



	width = vm->page_shift - 3;



	switch (vm->pgtable_levels) {

tools/testing/selftests/kvm/loongarch/arch_timer.c

+30 −0
Original line number Diff line number Diff line
@@ -136,10 +136,40 @@ static void guest_test_emulate_timer(uint32_t cpu) 
	local_irq_enable();

}



static void guest_time_count_test(uint32_t cpu)

{

	uint32_t config_iter;

	unsigned long start, end, prev, us;



	/* Assuming that test case starts to run in 1 second */

	start = timer_get_cycles();

	us = msec_to_cycles(1000);

	__GUEST_ASSERT(start <= us,

			"start = 0x%lx, us = 0x%lx.\n",

			start, us);



	us = msec_to_cycles(test_args.timer_period_ms);

	for (config_iter = 0; config_iter < test_args.nr_iter; config_iter++) {

		start = timer_get_cycles();

		end = start + us;

		/* test time count growing up always */

		while (start < end) {

			prev = start;

			start = timer_get_cycles();

			__GUEST_ASSERT(prev <= start,

					"prev = 0x%lx, start = 0x%lx.\n",

					prev, start);

		}

	}

}



static void guest_code(void)

{

	uint32_t cpu = guest_get_vcpuid();



	/* must run at first */

	guest_time_count_test(cpu);



	timer_irq_enable();

	local_irq_enable();

	guest_test_period_timer(cpu);