Split CPUID from op_helper
KVM needs to call CPUID from outside of the TCG code. This patch
splits out the CPUID logic into a separate helper that both the op
helper and KVM can call.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5626 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/target-i386/helper.c b/target-i386/helper.c
index 7569c7e..bcf5e7f 100644
--- a/target-i386/helper.c
+++ b/target-i386/helper.c
@@ -1287,3 +1287,169 @@
return paddr;
}
#endif /* !CONFIG_USER_ONLY */
+
+void cpu_x86_cpuid(CPUX86State *env, uint32_t index,
+ uint32_t *eax, uint32_t *ebx,
+ uint32_t *ecx, uint32_t *edx)
+{
+ /* test if maximum index reached */
+ if (index & 0x80000000) {
+ if (index > env->cpuid_xlevel)
+ index = env->cpuid_level;
+ } else {
+ if (index > env->cpuid_level)
+ index = env->cpuid_level;
+ }
+
+ switch(index) {
+ case 0:
+ *eax = env->cpuid_level;
+ *ebx = env->cpuid_vendor1;
+ *edx = env->cpuid_vendor2;
+ *ecx = env->cpuid_vendor3;
+ break;
+ case 1:
+ *eax = env->cpuid_version;
+ *ebx = (env->cpuid_apic_id << 24) | 8 << 8; /* CLFLUSH size in quad words, Linux wants it. */
+ *ecx = env->cpuid_ext_features;
+ *edx = env->cpuid_features;
+ break;
+ case 2:
+ /* cache info: needed for Pentium Pro compatibility */
+ *eax = 1;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0x2c307d;
+ break;
+ case 4:
+ /* cache info: needed for Core compatibility */
+ switch (*ecx) {
+ case 0: /* L1 dcache info */
+ *eax = 0x0000121;
+ *ebx = 0x1c0003f;
+ *ecx = 0x000003f;
+ *edx = 0x0000001;
+ break;
+ case 1: /* L1 icache info */
+ *eax = 0x0000122;
+ *ebx = 0x1c0003f;
+ *ecx = 0x000003f;
+ *edx = 0x0000001;
+ break;
+ case 2: /* L2 cache info */
+ *eax = 0x0000143;
+ *ebx = 0x3c0003f;
+ *ecx = 0x0000fff;
+ *edx = 0x0000001;
+ break;
+ default: /* end of info */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ }
+
+ break;
+ case 5:
+ /* mwait info: needed for Core compatibility */
+ *eax = 0; /* Smallest monitor-line size in bytes */
+ *ebx = 0; /* Largest monitor-line size in bytes */
+ *ecx = CPUID_MWAIT_EMX | CPUID_MWAIT_IBE;
+ *edx = 0;
+ break;
+ case 6:
+ /* Thermal and Power Leaf */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ case 9:
+ /* Direct Cache Access Information Leaf */
+ *eax = 0; /* Bits 0-31 in DCA_CAP MSR */
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ case 0xA:
+ /* Architectural Performance Monitoring Leaf */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ case 0x80000000:
+ *eax = env->cpuid_xlevel;
+ *ebx = env->cpuid_vendor1;
+ *edx = env->cpuid_vendor2;
+ *ecx = env->cpuid_vendor3;
+ break;
+ case 0x80000001:
+ *eax = env->cpuid_features;
+ *ebx = 0;
+ *ecx = env->cpuid_ext3_features;
+ *edx = env->cpuid_ext2_features;
+ break;
+ case 0x80000002:
+ case 0x80000003:
+ case 0x80000004:
+ *eax = env->cpuid_model[(index - 0x80000002) * 4 + 0];
+ *ebx = env->cpuid_model[(index - 0x80000002) * 4 + 1];
+ *ecx = env->cpuid_model[(index - 0x80000002) * 4 + 2];
+ *edx = env->cpuid_model[(index - 0x80000002) * 4 + 3];
+ break;
+ case 0x80000005:
+ /* cache info (L1 cache) */
+ *eax = 0x01ff01ff;
+ *ebx = 0x01ff01ff;
+ *ecx = 0x40020140;
+ *edx = 0x40020140;
+ break;
+ case 0x80000006:
+ /* cache info (L2 cache) */
+ *eax = 0;
+ *ebx = 0x42004200;
+ *ecx = 0x02008140;
+ *edx = 0;
+ break;
+ case 0x80000008:
+ /* virtual & phys address size in low 2 bytes. */
+/* XXX: This value must match the one used in the MMU code. */
+ if (env->cpuid_ext2_features & CPUID_EXT2_LM) {
+ /* 64 bit processor */
+#if defined(USE_KQEMU)
+ *eax = 0x00003020; /* 48 bits virtual, 32 bits physical */
+#else
+/* XXX: The physical address space is limited to 42 bits in exec.c. */
+ *eax = 0x00003028; /* 48 bits virtual, 40 bits physical */
+#endif
+ } else {
+#if defined(USE_KQEMU)
+ *eax = 0x00000020; /* 32 bits physical */
+#else
+ if (env->cpuid_features & CPUID_PSE36)
+ *eax = 0x00000024; /* 36 bits physical */
+ else
+ *eax = 0x00000020; /* 32 bits physical */
+#endif
+ }
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ case 0x8000000A:
+ *eax = 0x00000001; /* SVM Revision */
+ *ebx = 0x00000010; /* nr of ASIDs */
+ *ecx = 0;
+ *edx = 0; /* optional features */
+ break;
+ default:
+ /* reserved values: zero */
+ *eax = 0;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0;
+ break;
+ }
+}
