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authorIngo Molnar <mingo@elte.hu>2012-01-08 12:31:24 +0100
committerIngo Molnar <mingo@elte.hu>2012-01-08 12:31:24 +0100
commit636f0c70f2557e0819b50c74e31b4a027327015e (patch)
tree3a259ef26659dac92782651440091b9f5ab1a7f7 /Documentation
parent675eef66e3edcab8065533edfefbcbbacb9a30d3 (diff)
parent2e885057b7f75035f0b85e02f737891482815a81 (diff)
downloadop-kernel-dev-636f0c70f2557e0819b50c74e31b4a027327015e.zip
op-kernel-dev-636f0c70f2557e0819b50c74e31b4a027327015e.tar.gz
Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/virtual/kvm/api.txt16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 7945b0b..e2a4b52 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -1100,6 +1100,15 @@ emulate them efficiently. The fields in each entry are defined as follows:
eax, ebx, ecx, edx: the values returned by the cpuid instruction for
this function/index combination
+The TSC deadline timer feature (CPUID leaf 1, ecx[24]) is always returned
+as false, since the feature depends on KVM_CREATE_IRQCHIP for local APIC
+support. Instead it is reported via
+
+ ioctl(KVM_CHECK_EXTENSION, KVM_CAP_TSC_DEADLINE_TIMER)
+
+if that returns true and you use KVM_CREATE_IRQCHIP, or if you emulate the
+feature in userspace, then you can enable the feature for KVM_SET_CPUID2.
+
4.47 KVM_PPC_GET_PVINFO
Capability: KVM_CAP_PPC_GET_PVINFO
@@ -1151,6 +1160,13 @@ following flags are specified:
/* Depends on KVM_CAP_IOMMU */
#define KVM_DEV_ASSIGN_ENABLE_IOMMU (1 << 0)
+The KVM_DEV_ASSIGN_ENABLE_IOMMU flag is a mandatory option to ensure
+isolation of the device. Usages not specifying this flag are deprecated.
+
+Only PCI header type 0 devices with PCI BAR resources are supported by
+device assignment. The user requesting this ioctl must have read/write
+access to the PCI sysfs resource files associated with the device.
+
4.49 KVM_DEASSIGN_PCI_DEVICE
Capability: KVM_CAP_DEVICE_DEASSIGNMENT
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