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qemu: Enable 'host-passthrough' cpu mode for arm

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This patch allows libvirt user to specify 'host-passthrough'
cpu mode while using qemu/kvm backend on arm (arm32).
It uses 'host' as a CPU model name instead of some other stub
(correct CPU detection is not implemented yet) to allow libvirt
user to specify 'host-model' cpu mode as well.

Signed-off-by: Oleg Strikov <oleg.strikov@canonical.com>
This commit is contained in:
Oleg Strikov 2014-02-26 20:40:12 +04:00 committed by Cole Robinson
parent 9c439e9bb2
commit 97962616c1
1 changed files with 26 additions and 4 deletions
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30
src/cpu/cpu_arm.c
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@ -26,6 +26,7 @@
#include "viralloc.h" #include "viralloc.h"
#include "cpu.h" #include "cpu.h"
#include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_CPU #define VIR_FROM_THIS VIR_FROM_CPU
@ -45,16 +46,19 @@ ArmNodeData(virArch arch)
} }
static int static int
ArmDecode(virCPUDefPtr cpu ATTRIBUTE_UNUSED, ArmDecode(virCPUDefPtr cpu,
const virCPUData *data ATTRIBUTE_UNUSED, const virCPUData *data ATTRIBUTE_UNUSED,
const char **models ATTRIBUTE_UNUSED, const char **models ATTRIBUTE_UNUSED,
unsigned int nmodels ATTRIBUTE_UNUSED, unsigned int nmodels ATTRIBUTE_UNUSED,
const char *preferred ATTRIBUTE_UNUSED, const char *preferred ATTRIBUTE_UNUSED,
unsigned int flags) unsigned int flags)
{ {
virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, -1); virCheckFlags(VIR_CONNECT_BASELINE_CPU_EXPAND_FEATURES, -1);
if (cpu->model == NULL &&
VIR_STRDUP(cpu->model, "host") < 0)
return -1;
return 0; return 0;
} }
@ -64,6 +68,24 @@ ArmDataFree(virCPUDataPtr data)
VIR_FREE(data); VIR_FREE(data);
} }
static int
ArmUpdate(virCPUDefPtr guest,
const virCPUDef *host)
{
guest->match = VIR_CPU_MATCH_EXACT;
virCPUDefFreeModel(guest);
return virCPUDefCopyModel(guest, host, true);
}
static virCPUCompareResult
ArmGuestData(virCPUDefPtr host ATTRIBUTE_UNUSED,
virCPUDefPtr guest ATTRIBUTE_UNUSED,
virCPUDataPtr *data ATTRIBUTE_UNUSED,
char **message ATTRIBUTE_UNUSED)
{
return VIR_CPU_COMPARE_IDENTICAL;
}
struct cpuArchDriver cpuDriverArm = { struct cpuArchDriver cpuDriverArm = {
.name = "arm", .name = "arm",
.arch = archs, .arch = archs,
@ -73,8 +95,8 @@ struct cpuArchDriver cpuDriverArm = {
.encode = NULL, .encode = NULL,
.free = ArmDataFree, .free = ArmDataFree,
.nodeData = ArmNodeData, .nodeData = ArmNodeData,
.guestData = NULL, .guestData = ArmGuestData,
.baseline = NULL, .baseline = NULL,
.update = NULL, .update = ArmUpdate,
.hasFeature = NULL, .hasFeature = NULL,
}; };