Turns out that patch #32 is the one that causes the command line:
./x86_64-softmmu/qemu-system-x86_64 -cpu
486,+fpu,+vme,+de,+pse,+tsc,+msr,+pae,+mce,+cx8,+apic,+sep,+mtrr,+pge,+mca,+cmov,+pat,+pse36,+pn,+clflush,+ds,+acpi,+mmx,+fxsr,+sse,+sse2,+ss,+ht,+tm,+ia64,+pbe,+pni,+sse3,+pclmulqdq,+pclmuldq,+dtes64,+monitor,+ds_cpl,+vmx,+smx,+est,+tm2,+ssse3,+cid,+fma,+cx16,+xtpr,+pdcm,+pcid,+dca,+sse4.1,+sse4.2,+sse4_1,+sse4_2,+x2apic,+movbe,+popcnt,+tsc-deadline,+aes,+xsave,+osxsave,+avx,+hypervisor,+syscall,+nx,+xd,+mmxext,+fxsr_opt,+ffxsr,+pdpe1gb,+rdtscp,+lahf_lm,+cmp_legacy,+svm,+extapic,+cr8legacy,+abm,+sse4a,+misalignsse,+3dnowprefetch,+osvw,+ibs,+xop,+skinit,+wdt,+fma4,+cvt16,+nodeid_msr,+kvmclock1,+kvm_nopiodelay,+kvm_mmu,+kvmclock2,+kvm_asyncpf,+kvm_steal_tm,+kvm_pv_eoi,+kvmclock_stable,+npt,+lbrv,+svm_lock,+nrip_save,+tsc_scale,+vmcb_clean,+flushbyasid,+decodeassists,+pause_filter,+pfthreshold,+smep,+smap,family=6,model=23,stepping=10,level=13,xlevel=0x80000008,vendor="GenuineIntel",model-id="Intel(R)
Core(TM)2 Quad CPU Q9650 @
3.00GHz",+pbe,+tm,+ht,+ss,+sse2,+sse,+fxsr,+mmx,+acpi,+ds,+clflush,+pse36,+pat,+cmov,+mca,+pge,+mtrr,+sep,+apic,+cx8,+mce,+pae,+msr,+tsc,+pse,+de,+vme,+fpu,+osxsave,+xsave,+sse4_1,+pdcm,+xtpr,+cx16,+ssse3,+tm2,+est,+smx,+vmx,+ds_cpl,+monitor,+dtes64,+sse3,+nx,+lahf_lm
~/qemu-img/CentOS5-32.raw -cdrom
/isos/iso/centos/i386/CentOS-5.3-i386-bin-DVD.iso -machine pc,accel=kvm
-m 1024 -monitor stdio
to stop allowing 64bit code to run. However this patch has the key info
(see below).
On 10/22/12 11:03, Igor Mammedov wrote:
convert x86_cpu_list() to use QDEV_FIND_PROP_FROM_BIT() for getting
CPUID feature name.
In addition since x86_cpu_list() was the last user of *feature_name
arrays, clean them up.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
target-i386/cpu.c | 106 +++++++++++-------------------------------------------
1 file changed, 20 insertions(+), 86 deletions(-)
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 89ef2a7..8d7718c 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -38,55 +38,6 @@
#include <linux/kvm_para.h>
#endif
-/* feature flags taken from "Intel Processor Identification and the CPUID
- * Instruction" and AMD's "CPUID Specification". In cases of disagreement
- * between feature naming conventions, aliases may be added.
- */
-static const char *feature_name[] = {
- "fpu", "vme", "de", "pse",
- "tsc", "msr", "pae", "mce",
- "cx8", "apic", NULL, "sep",
- "mtrr", "pge", "mca", "cmov",
- "pat", "pse36", "pn" /* Intel psn */, "clflush" /* Intel clfsh */,
- NULL, "ds" /* Intel dts */, "acpi", "mmx",
- "fxsr", "sse", "sse2", "ss",
- "ht" /* Intel htt */, "tm", "ia64", "pbe",
-};
-static const char *ext_feature_name[] = {
- "pni|sse3" /* Intel,AMD sse3 */, "pclmulqdq|pclmuldq", "dtes64", "monitor",
- "ds_cpl", "vmx", "smx", "est",
- "tm2", "ssse3", "cid", NULL,
- "fma", "cx16", "xtpr", "pdcm",
- NULL, "pcid", "dca", "sse4.1|sse4_1",
- "sse4.2|sse4_2", "x2apic", "movbe", "popcnt",
- "tsc-deadline", "aes", "xsave", "osxsave",
- "avx", NULL, NULL, "hypervisor",
-};
-/* Feature names that are already defined on feature_name[] but are set on
- * CPUID[8000_0001].EDX on AMD CPUs don't have their names on
- * ext2_feature_name[]. They are copied automatically to cpuid_ext2_features
- * if and only if CPU vendor is AMD.
- */
-static const char *ext2_feature_name[] = {
- NULL /* fpu */, NULL /* vme */, NULL /* de */, NULL /* pse */,
- NULL /* tsc */, NULL /* msr */, NULL /* pae */, NULL /* mce */,
- NULL /* cx8 */ /* AMD CMPXCHG8B */, NULL /* apic */, NULL, "syscall",
- NULL /* mtrr */, NULL /* pge */, NULL /* mca */, NULL /* cmov */,
- NULL /* pat */, NULL /* pse36 */, NULL, NULL /* Linux mp */,
- "nx|xd", NULL, "mmxext", NULL /* mmx */,
- NULL /* fxsr */, "fxsr_opt|ffxsr", "pdpe1gb" /* AMD Page1GB */, "rdtscp",
-};
This array does not have 32 entries. And at least on my test machine
"+lahf_lm" sets ext2_feature bit 29 (and also ext3_feature bit 0).
From http://www.sandpile.org/x86/cpuid.htm#level_8000_0001h
bit 29 (LM) AMD64/EM64T, Long Mode
bit 29 (LM) AMD64/EM64T, Long Mode
(And the next 2 bits are defined as well:
bit 30 (3DNow!+) extended 3DNow!
bit 31 (3DNow!) 3DNow!
).
Since master has this bug (feature?), I feel that access to ext2 bit 29
is needed ("f-lm" ?)
-Don Slutz
-static const char *ext3_feature_name[] = {
- "lahf_lm" /* AMD LahfSahf */, "cmp_legacy", "svm", "extapic" /* AMD
ExtApicSpace */,
- "cr8legacy" /* AMD AltMovCr8 */, "abm", "sse4a", "misalignsse",
- "3dnowprefetch", "osvw", "ibs", "xop",
- "skinit", "wdt", NULL, NULL,
- "fma4", NULL, "cvt16", "nodeid_msr",
- NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL,
- NULL, NULL, NULL, NULL,
-};
-
#if defined(CONFIG_KVM)
static void x86_cpu_get_kvmclock(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
@@ -1495,35 +1446,22 @@ error:
return -1;
}
-/* generate a composite string into buf of all cpuid names in featureset
- * selected by fbits. indicate truncation at bufsize in the event of overflow.
- * if flags, suppress names undefined in featureset.
- */
-static void listflags(char *buf, int bufsize, uint32_t fbits,
- const char **featureset, uint32_t flags)
-{
- const char **p = &featureset[31];
- char *q, *b, bit;
- int nc;
-
- b = 4 <= bufsize ? buf + (bufsize -= 3) - 1 : NULL;
- *buf = '\0';
- for (q = buf, bit = 31; fbits && bufsize; --p, fbits &= ~(1 << bit), --bit)
- if (fbits & 1 << bit && (*p || !flags)) {
- if (*p)
- nc = snprintf(q, bufsize, "%s%s", q == buf ? "" : " ", *p);
- else
- nc = snprintf(q, bufsize, "%s[%d]", q == buf ? "" : " ", bit);
- if (bufsize <= nc) {
- if (b) {
- memcpy(b, "...", sizeof("..."));
- }
- return;
- }
- q += nc;
- bufsize -= nc;
- }
-}
+#define LIST_FLAGS(_typename, _state, _field) \
+ do { \
+ int i; \
+ const Property *prop; \
+ const DeviceClass *dc; \
+ dc = DEVICE_CLASS(object_class_by_name((_typename))); \
+ (*cpu_fprintf)(f, " "); \
+ for (i = 31; i; --i) { \
+ prop = QDEV_FIND_PROP_FROM_BIT(dc, _state, _field, i); \
+ if (prop) { \
+ /* for compatibility do not print f- prefix */ \
+ (*cpu_fprintf)(f, " %s", prop->name + 2); \
+ } \
+ } \
+ (*cpu_fprintf)(f, "\n"); \
+ } while (0)
/* generate CPU information. */
void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf)
@@ -1539,14 +1477,10 @@ void x86_cpu_list(FILE *f, fprintf_function cpu_fprintf)
(*cpu_fprintf)(f, "x86 %16s\n", "[host]");
}
(*cpu_fprintf)(f, "\nRecognized CPUID flags:\n");
- listflags(buf, sizeof(buf), (uint32_t)~0, feature_name, 1);
- (*cpu_fprintf)(f, " %s\n", buf);
- listflags(buf, sizeof(buf), (uint32_t)~0, ext_feature_name, 1);
- (*cpu_fprintf)(f, " %s\n", buf);
- listflags(buf, sizeof(buf), (uint32_t)~0, ext2_feature_name, 1);
- (*cpu_fprintf)(f, " %s\n", buf);
- listflags(buf, sizeof(buf), (uint32_t)~0, ext3_feature_name, 1);
- (*cpu_fprintf)(f, " %s\n", buf);
+ LIST_FLAGS(TYPE_X86_CPU, CPUX86State, cpuid_features);
+ LIST_FLAGS(TYPE_X86_CPU, CPUX86State, cpuid_ext_features);
+ LIST_FLAGS(TYPE_X86_CPU, CPUX86State, cpuid_ext2_features);
+ LIST_FLAGS(TYPE_X86_CPU, CPUX86State, cpuid_ext3_features);
}
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
