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target/riscv/kvm: fix timebase-frequency when using KVM acceleration

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The timebase-frequency of guest OS should be the same with host
machine. The timebase-frequency value in DTS should be got from
hypervisor when using KVM acceleration.

Signed-off-by: Yong-Xuan Wang <yongxuan.wang@sifive.com>
Message-ID: <20240314061510.9800-1-yongxuan.wang@sifive.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Yong-Xuan Wang 2024-03-14 14:15:09 +08:00 • committed by Alistair Francis
parent e06adebb08
commit 385e575cd5
3 changed files with 12 additions and 0 deletions
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9
target/riscv/kvm/kvm-cpu.c
View file

@ -739,6 +739,15 @@ static void kvm_riscv_put_regs_timer(CPUState *cs)
env->kvm_timer_dirty = false;
}
uint64_t kvm_riscv_get_timebase_frequency(CPUState *cs)
{
uint64_t reg;
KVM_RISCV_GET_TIMER(cs, frequency, reg);
return reg;
}
static int kvm_riscv_get_regs_vector(CPUState *cs)
{
RISCVCPU *cpu = RISCV_CPU(cs);

1
target/riscv/kvm/kvm_riscv.h
View file

@ -28,5 +28,6 @@ void kvm_riscv_aia_create(MachineState *machine, uint64_t group_shift,
void riscv_kvm_aplic_request(void *opaque, int irq, int level);
int kvm_riscv_sync_mpstate_to_kvm(RISCVCPU *cpu, int state);
void riscv_kvm_cpu_finalize_features(RISCVCPU *cpu, Error **errp);
uint64_t kvm_riscv_get_timebase_frequency(CPUState *cs);
#endif