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-rw-r--r--target/riscv/kvm.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 9d8a8982f9..b1fd2233c0 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -852,12 +852,19 @@ void kvm_arch_init_irq_routing(KVMState *s)
static int kvm_vcpu_set_machine_ids(RISCVCPU *cpu, CPUState *cs)
{
CPURISCVState *env = &cpu->env;
+ target_ulong reg;
uint64_t id;
int ret;
id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG,
KVM_REG_RISCV_CONFIG_REG(mvendorid));
- ret = kvm_set_one_reg(cs, id, &cpu->cfg.mvendorid);
+ /*
+ * cfg.mvendorid is an uint32 but a target_ulong will
+ * be written. Assign it to a target_ulong var to avoid
+ * writing pieces of other cpu->cfg fields in the reg.
+ */
+ reg = cpu->cfg.mvendorid;
+ ret = kvm_set_one_reg(cs, id, &reg);
if (ret != 0) {
return ret;
}