diff options
| author | Bibo Mao <maobibo@loongson.cn> | 2025-11-28 14:49:48 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-11-28 14:49:48 +0800 |
| commit | 0f90fa6e2e9d98349492d9968c11ceaf2f958c98 (patch) | |
| tree | 6492a70e3f0c693e1ee448b4ec83cd0612f8f169 | |
| parent | 4e8824094069b04e3b3583d855c975ccb6a9bec5 (diff) | |
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: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
| -rw-r--r-- | tools/testing/selftests/kvm/lib/loongarch/processor.c | 9 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/loongarch/arch_timer.c | 30 |
2 files changed, 39 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/loongarch/processor.c b/tools/testing/selftests/kvm/lib/loongarch/processor.c index a1b16140942b..07c103369ddb 100644 --- a/tools/testing/selftests/kvm/lib/loongarch/processor.c +++ b/tools/testing/selftests/kvm/lib/loongarch/processor.c @@ -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, ®s); } +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) { diff --git a/tools/testing/selftests/kvm/loongarch/arch_timer.c b/tools/testing/selftests/kvm/loongarch/arch_timer.c index baa30fd296f5..355ecac30954 100644 --- a/tools/testing/selftests/kvm/loongarch/arch_timer.c +++ b/tools/testing/selftests/kvm/loongarch/arch_timer.c @@ -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); |