forked from pool/libvirt
37 lines
1.5 KiB
Diff
37 lines
1.5 KiB
Diff
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commit af521a0182a0d6867796c65b1b0cd83fb14032a9
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Author: Jim Fehlig <jfehlig@novell.com>
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Date: Wed Jan 5 15:20:01 2011 -0700
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Add HAP to xen hypervisor capabilities
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xen-unstable c/s 16931 introduced a per-domain setting for hvm
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guests to enable/disable hardware assisted paging. If disabled,
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software techniques such as shadow page tables are used. If enabled,
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and the feature exists in underlying hardware, hardware support for
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paging is used.
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Xen does not provide a mechanism to discover the HAP capability, so
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we advertise its availability for hvm guests on Xen >= 3.3.
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diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c
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index ead8ee9..229ef3d 100644
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--- a/src/xen/xen_hypervisor.c
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+++ b/src/xen/xen_hypervisor.c
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@@ -2321,6 +2321,16 @@ xenHypervisorBuildCapabilities(virConnectPtr conn,
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hv_minor > 0 ?
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0 : 1)) == NULL)
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goto no_memory;
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+
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+ /* Xen 3.3.x and beyond supports enabling/disabling
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+ * hardware assisted paging. Default is off.
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+ */
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+ if ((hv_major == 3 && hv_minor >= 3) || (hv_major > 3))
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+ if (virCapabilitiesAddGuestFeature(guest,
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+ "hap",
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+ 0,
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+ 1) == NULL)
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+ goto no_memory;
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}
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}
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