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libxl: describe host topology in capabilities

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Add support for describing cpu topology in host cpu element.  In doing
so, refactor hwcaps part to its own helper namely libxlCapsInitCPU to
handle all host cpu related operations, including topology.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
This commit is contained in:
Joao Martins 2016-07-20 20:08:46 +01:00 committed by Michal Privoznik
parent 85c826129b
commit 3d54305e1c
1 changed files with 37 additions and 9 deletions
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46
src/libxl/libxl_capabilities.c
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@ -57,12 +57,47 @@ struct guest_arch {
#define XEN_CAP_REGEX "(xen|hvm)-[[:digit:]]+\\.[[:digit:]]+-(aarch64|armv7l|x86_32|x86_64|ia64|powerpc64)(p|be)?"
/* hw_caps is an array of 32-bit words whose meaning is listed in
* xen-unstable.hg/xen/include/asm-x86/cpufeature.h. Each feature
* is defined in the form X*32+Y, corresponding to the Y'th bit in
* the X'th 32-bit word of hw_cap.
*/
static int
libxlCapsInitCPU(virCapsPtr caps, libxl_physinfo *phy_info)
{
virCPUDefPtr cpu = NULL;
int ret = -1;
int host_pae;
if (VIR_ALLOC(cpu) < 0)
goto error;
host_pae = phy_info->hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
if (host_pae &&
virCapabilitiesAddHostFeature(caps, "pae") < 0)
goto error;
cpu->type = VIR_CPU_TYPE_HOST;
cpu->cores = phy_info->cores_per_socket;
cpu->threads = phy_info->threads_per_core;
cpu->sockets = phy_info->nr_cpus / (cpu->cores * cpu->threads);
caps->host.cpu = cpu;
ret = 0;
cleanup:
return ret;
error:
virCPUDefFree(cpu);
goto cleanup;
}
static int
libxlCapsInitHost(libxl_ctx *ctx, virCapsPtr caps)
{
libxl_physinfo phy_info;
int host_pae;
if (libxl_get_physinfo(ctx, &phy_info) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
@ -70,14 +105,7 @@ libxlCapsInitHost(libxl_ctx *ctx, virCapsPtr caps)
return -1;
}
/* hw_caps is an array of 32-bit words whose meaning is listed in
* xen-unstable.hg/xen/include/asm-x86/cpufeature.h. Each feature
* is defined in the form X*32+Y, corresponding to the Y'th bit in
* the X'th 32-bit word of hw_cap.
*/
host_pae = phy_info.hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
if (host_pae &&
virCapabilitiesAddHostFeature(caps, "pae") < 0)
if (libxlCapsInitCPU(caps, &phy_info) < 0)
return -1;
if (virCapabilitiesSetNetPrefix(caps, LIBXL_GENERATED_PREFIX_XEN) < 0)