From 0f90fa6e2e9d98349492d9968c11ceaf2f958c98 Mon Sep 17 00:00:00 2001 From: Bibo Mao Date: Fri, 28 Nov 2025 14:49:48 +0800 Subject: 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 Signed-off-by: Huacai Chen --- tools/testing/selftests/kvm/lib/loongarch/processor.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'tools/testing/selftests/kvm/lib/loongarch/processor.c') 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 #include +#include #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) { -- cgit v1.2.3