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authorPaolo Bonzini <pbonzini@redhat.com>2013-11-19 17:49:46 +0100
committerAnthony Liguori <aliguori@amazon.com>2013-11-21 07:56:16 -0800
commit76c2975a6feb5c232698e982b7f798431457822f (patch)
tree97e1a8d255dd526bc3dd396c465b6ca3688dc50b
parent54e755588cf1e90f0b1460c4e8e6b6a54b6d3a32 (diff)
downloadqemu-arm-76c2975a6feb5c232698e982b7f798431457822f.tar.gz
target-i386: do not override nr_cores for -cpu host
Commit 787aaf5 (target-i386: forward CPUID cache leaves when -cpu host is used, 2013-09-02) brings bits 31..26 of CPUID leaf 04h out of sync with the APIC IDs that QEMU reserves for each package. This number must come from "-smp" options rather than from the host CPUID. It also turns out that this unsyncing makes Windows Server 2012R2 fail to boot. Tested-by: Peter Lieven <pl@kamp.de> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Message-id: 1384879786-6721-1-git-send-email-pbonzini@redhat.com Signed-off-by: Anthony Liguori <aliguori@amazon.com>
-rw-r--r--target-i386/cpu.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 864c80eb47..47af9a8816 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -2086,14 +2086,10 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
/* cache info: needed for Core compatibility */
if (cpu->cache_info_passthrough) {
host_cpuid(index, count, eax, ebx, ecx, edx);
- break;
- }
- if (cs->nr_cores > 1) {
- *eax = (cs->nr_cores - 1) << 26;
+ *eax &= ~0xFC000000;
} else {
*eax = 0;
- }
- switch (count) {
+ switch (count) {
case 0: /* L1 dcache info */
*eax |= CPUID_4_TYPE_DCACHE | \
CPUID_4_LEVEL(1) | \
@@ -2133,6 +2129,12 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*ecx = 0;
*edx = 0;
break;
+ }
+ }
+
+ /* QEMU gives out its own APIC IDs, never pass down bits 31..26. */
+ if ((*eax & 31) && cs->nr_cores > 1) {
+ *eax |= (cs->nr_cores - 1) << 26;
}
break;
case 5: