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x86 bug fixes

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Fix for a XSAVE regression when using "-cpu host", and a fix on
 the Opteron_G3 CPU model.
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Merge remote-tracking branch 'remotes/ehabkost/tags/x86-pull-request' into staging

x86 bug fixes

Fix for a XSAVE regression when using "-cpu host", and a fix on
the Opteron_G3 CPU model.

# gpg: Signature made Mon 03 Oct 2016 20:08:13 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-pull-request:
  target-i386: Correct family/model/stepping for Opteron_G3
  target-i386: Report known CPUID[EAX=0xD,ECX=0]:EAX bits as migratable

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-10-04 11:28:30 +01:00
commit 1bb4710705
2 changed files with 29 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
include/hw/i386/pc.h
View File

@ -379,6 +379,21 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "full-cpuid-auto-level",\
.value = "off",\
},\
{\
.driver = "Opteron_G3" "-" TYPE_X86_CPU,\
.property = "family",\
.value = "15",\
},\
{\
.driver = "Opteron_G3" "-" TYPE_X86_CPU,\
.property = "model",\
.value = "6",\
},\
{\
.driver = "Opteron_G3" "-" TYPE_X86_CPU,\
.property = "stepping",\
.value = "1",\
},
#define PC_COMPAT_2_6 \

25
target-i386/cpu.c
View File

@ -258,6 +258,7 @@ typedef struct FeatureWordInfo {
int cpuid_reg; /* output register (R_* constant) */
uint32_t tcg_features; /* Feature flags supported by TCG */
uint32_t unmigratable_flags; /* Feature flags known to be unmigratable */
uint32_t migratable_flags; /* Feature flags known to be migratable */
} FeatureWordInfo;
static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
@ -494,6 +495,10 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.cpuid_needs_ecx = true, .cpuid_ecx = 0,
.cpuid_reg = R_EAX,
.tcg_features = ~0U,
.migratable_flags = XSTATE_FP_MASK | XSTATE_SSE_MASK |
XSTATE_YMM_MASK | XSTATE_BNDREGS_MASK | XSTATE_BNDCSR_MASK |
XSTATE_OPMASK_MASK | XSTATE_ZMM_Hi256_MASK | XSTATE_Hi16_ZMM_MASK |
XSTATE_PKRU_MASK,
},
[FEAT_XSAVE_COMP_HI] = {
.cpuid_eax = 0xD,
@ -600,15 +605,13 @@ static uint32_t x86_cpu_get_migratable_flags(FeatureWord w)
for (i = 0; i < 32; i++) {
uint32_t f = 1U << i;
/* If the feature name is unknown, it is not supported by QEMU yet */
if (!wi->feat_names[i]) {
continue;
/* If the feature name is known, it is implicitly considered migratable,
* unless it is explicitly set in unmigratable_flags */
if ((wi->migratable_flags & f) ||
(wi->feat_names[i] && !(wi->unmigratable_flags & f))) {
r |= f;
}
/* Skip features known to QEMU, but explicitly marked as unmigratable */
if (wi->unmigratable_flags & f) {
continue;
}
r |= f;
}
return r;
}
@ -1425,9 +1428,9 @@ static X86CPUDefinition builtin_x86_defs[] = {
.name = "Opteron_G3",
.level = 5,
.vendor = CPUID_VENDOR_AMD,
.family = 15,
.model = 6,
.stepping = 1,
.family = 16,
.model = 2,
.stepping = 3,
.features[FEAT_1_EDX] =
CPUID_VME | CPUID_SSE2 | CPUID_SSE | CPUID_FXSR | CPUID_MMX |
CPUID_CLFLUSH | CPUID_PSE36 | CPUID_PAT | CPUID_CMOV | CPUID_MCA |