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target/riscv/kvm: add max_satp_mode from host cpu

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This patch adds max_satp_mode from host kvm cpu setting.

Tested on: Milkv Megrez (Eswin 7700x)

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2931
Signed-off-by: Meng Zhuo <mengzhuo@iscas.ac.cn>
Message-ID: <20250606034250.181707-1-mengzhuo@iscas.ac.cn>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Meng Zhuo
2025-07-04 21:09:48 +10:00
committed by Alistair Francis
parent f9eaa1542b
commit b0175841fa
1 changed files with 15 additions and 1 deletions
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target/riscv/kvm/kvm-cpu.c
+15 -1
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@@ -999,6 +999,19 @@ static void kvm_riscv_destroy_scratch_vcpu(KVMScratchCPU *scratch)
close(scratch->kvmfd);
}
static void kvm_riscv_init_max_satp_mode(RISCVCPU *cpu, KVMScratchCPU *kvmcpu)
{
struct kvm_one_reg reg;
int ret;
reg.id = RISCV_CONFIG_REG(satp_mode);
reg.addr = (uint64_t)&cpu->cfg.max_satp_mode;
ret = ioctl(kvmcpu->cpufd, KVM_GET_ONE_REG, &reg);
if (ret != 0) {
error_report("Unable to retrieve satp mode from host, error %d", ret);
}
}
static void kvm_riscv_init_machine_ids(RISCVCPU *cpu, KVMScratchCPU *kvmcpu)
{
struct kvm_one_reg reg;
@@ -1302,6 +1315,7 @@ static void riscv_init_kvm_registers(Object *cpu_obj)
kvm_riscv_init_machine_ids(cpu, &kvmcpu);
kvm_riscv_init_misa_ext_mask(cpu, &kvmcpu);
kvm_riscv_init_cfg(cpu, &kvmcpu);
kvm_riscv_init_max_satp_mode(cpu, &kvmcpu);
kvm_riscv_destroy_scratch_vcpu(&kvmcpu);
}
@@ -1985,7 +1999,7 @@ static bool kvm_cpu_realize(CPUState *cs, Error **errp)
}
}
return true;
return true;
}
void riscv_kvm_cpu_finalize_features(RISCVCPU *cpu, Error **errp)