aboutsummaryrefslogtreecommitdiff
path: root/Documentation/virtual
diff options
context:
space:
mode:
authorAnup Patel <anup.patel@linaro.org>2013-09-30 14:20:08 +0530
committerChristoffer Dall <christoffer.dall@linaro.org>2013-10-02 11:29:49 -0700
commit740edfc0a35dd688c97ae8907c4377df49219bf3 (patch)
tree5349197e44335ce4dd8bbf44e8029cf87c188728 /Documentation/virtual
parent42c4e0c77ac91505ab94284b14025e3a0865c0a5 (diff)
downloadlinux-linaro-stable-740edfc0a35dd688c97ae8907c4377df49219bf3.tar.gz
KVM: Add documentation for KVM_ARM_PREFERRED_TARGET ioctl
To implement CPU=Host we have added KVM_ARM_PREFERRED_TARGET vm ioctl which provides information to user space required for creating VCPU matching underlying Host. This patch adds info related to this new KVM_ARM_PREFERRED_TARGET vm ioctl in the KVM API documentation. Signed-off-by: Anup Patel <anup.patel@linaro.org> Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'Documentation/virtual')
-rw-r--r--Documentation/virtual/kvm/api.txt31
1 files changed, 27 insertions, 4 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 858aecf21db2..076b8492d810 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2304,7 +2304,31 @@ Possible features:
Depends on KVM_CAP_ARM_EL1_32BIT (arm64 only).
-4.83 KVM_GET_REG_LIST
+4.83 KVM_ARM_PREFERRED_TARGET
+
+Capability: basic
+Architectures: arm, arm64
+Type: vm ioctl
+Parameters: struct struct kvm_vcpu_init (out)
+Returns: 0 on success; -1 on error
+Errors:
+  ENODEV:    no preferred target available for the host
+
+This queries KVM for preferred CPU target type which can be emulated
+by KVM on underlying host.
+
+The ioctl returns struct kvm_vcpu_init instance containing information
+about preferred CPU target type and recommended features for it. The
+kvm_vcpu_init->features bitmap returned will have feature bits set if
+the preferred target recommends setting these features, but this is
+not mandatory.
+
+The information returned by this ioctl can be used to prepare an instance
+of struct kvm_vcpu_init for KVM_ARM_VCPU_INIT ioctl which will result in
+in VCPU matching underlying host.
+
+
+4.84 KVM_GET_REG_LIST
Capability: basic
Architectures: arm, arm64
@@ -2323,8 +2347,7 @@ struct kvm_reg_list {
This ioctl returns the guest registers that are supported for the
KVM_GET_ONE_REG/KVM_SET_ONE_REG calls.
-
-4.84 KVM_ARM_SET_DEVICE_ADDR
+4.85 KVM_ARM_SET_DEVICE_ADDR
Capability: KVM_CAP_ARM_SET_DEVICE_ADDR
Architectures: arm, arm64
@@ -2362,7 +2385,7 @@ must be called after calling KVM_CREATE_IRQCHIP, but before calling
KVM_RUN on any of the VCPUs. Calling this ioctl twice for any of the
base addresses will return -EEXIST.
-4.85 KVM_PPC_RTAS_DEFINE_TOKEN
+4.86 KVM_PPC_RTAS_DEFINE_TOKEN
Capability: KVM_CAP_PPC_RTAS
Architectures: ppc