target/loongarch: Add some CPUCFG bits with host CPU model

Some CPUCFG capability bits depend on KVM host hypervsior and they
are detected on QEMU. However some CPUCFG bits are irrelative with
hypervsior, here these bits are checked from host machine and set
for VM with host CPU model.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>

target/loongarch/cpu.c

@@ -532,7 +532,7 @@ static uint32_t get_host_cpucfg(int number)
 
 static void loongarch_host_initfn(Object *obj)
 {
-    uint32_t data;
+    uint32_t data, cpucfg, field;
     uint64_t cpuid;
     LoongArchCPU *cpu = LOONGARCH_CPU(obj);
 
@@ -542,6 +542,40 @@ static void loongarch_host_initfn(Object *obj)
         cpu->env.cpucfg[0] = data;
     }
 
+   /*
+    * There is no exception in KVM hypervisor when these intructions are
+    * executed if HW support, KVM hypervisor cannot control this.
+    *
+    * Set cpucfg bits which cannot be controlled by KVM hypervisor.
+    */
+    data = get_host_cpucfg(2);
+    cpucfg = cpu->env.cpucfg[2];
+    field = FIELD_EX32(data, CPUCFG2, FRECIPE);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, FRECIPE, field);
+    field = FIELD_EX32(data, CPUCFG2, DIV32);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, DIV32, field);
+    field = FIELD_EX32(data, CPUCFG2, LAM_BH);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, LAM_BH, field);
+    field = FIELD_EX32(data, CPUCFG2, LAMCAS);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, LAMCAS, field);
+    field = FIELD_EX32(data, CPUCFG2, LLACQ_SCREL);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, LLACQ_SCREL, field);
+    field = FIELD_EX32(data, CPUCFG2, SCQ);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG2, SCQ, field);
+    cpu->env.cpucfg[2] = cpucfg;
+
+    data = get_host_cpucfg(3);
+    cpucfg = cpu->env.cpucfg[3];
+    field = FIELD_EX32(data, CPUCFG3, DBAR_HINTS);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG3, DBAR_HINTS, field);
+    field = FIELD_EX32(data, CPUCFG3, ALDORDER_STA);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG3, ALDORDER_STA, field);
+    field = FIELD_EX32(data, CPUCFG3, ASTORDER_STA);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG3, ASTORDER_STA, field);
+    field = FIELD_EX32(data, CPUCFG3, SLDORDER_STA);
+    cpucfg = FIELD_DP32(cpucfg, CPUCFG3, SLDORDER_STA, field);
+    cpu->env.cpucfg[3] = cpucfg;
+
     cpuid = get_host_cpu_model();
     if (cpuid) {
         cpu->env.cpu_id = cpuid;

target/loongarch/cpu.h

@@ -147,6 +147,7 @@ FIELD(CPUCFG2, LSPW, 21, 1)
 FIELD(CPUCFG2, LAM, 22, 1)
 FIELD(CPUCFG2, HPTW, 24, 1)
 FIELD(CPUCFG2, FRECIPE, 25, 1)
+FIELD(CPUCFG2, DIV32, 26, 1)
 FIELD(CPUCFG2, LAM_BH, 27, 1)
 FIELD(CPUCFG2, LAMCAS, 28, 1)
 FIELD(CPUCFG2, LLACQ_SCREL, 29, 1)
@@ -165,6 +166,13 @@ FIELD(CPUCFG3, SPW_LVL, 8, 3)
 FIELD(CPUCFG3, SPW_HP_HF, 11, 1)
 FIELD(CPUCFG3, RVA, 12, 1)
 FIELD(CPUCFG3, RVAMAX, 13, 4)
+FIELD(CPUCFG3, DBAR_HINTS, 17, 1)
+FIELD(CPUCFG3, ALDORDER_CAP, 18, 1)
+FIELD(CPUCFG3, ASTORDER_CAP, 19, 1)
+FIELD(CPUCFG3, ALDORDER_STA, 20, 1)
+FIELD(CPUCFG3, ASTORDER_STA, 21, 1)
+FIELD(CPUCFG3, SLDORDER_CAP, 22, 1)
+FIELD(CPUCFG3, SLDORDER_STA, 23, 1)
 
 /* cpucfg[4] bits */
 FIELD(CPUCFG4, CC_FREQ, 0, 32)