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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-05-16 18:21:31 +0300 |
|---|---|---|
| committer | Radim Krčmář <rkrcmar@redhat.com> | 2018-05-26 16:35:35 +0300 |
| commit | c1aea9196ef4f6b64a8ef7e62a933f7e4164aed9 (patch) | |
| tree | 8e6c26810c55248da4999bf0d9a4133c6c17f2d6 /Documentation | |
| parent | c70126764bf09c5dd95527808b647ec347b8a822 (diff) | |
| download | linux-c1aea9196ef4f6b64a8ef7e62a933f7e4164aed9.tar.xz | |
KVM: x86: hyperv: declare KVM_CAP_HYPERV_TLBFLUSH capability
We need a new capability to indicate support for the newly added
HvFlushVirtualAddress{List,Space}{,Ex} hypercalls. Upon seeing this
capability, userspace is supposed to announce PV TLB flush features
by setting the appropriate CPUID bits (if needed).
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virtual/kvm/api.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 758bf403a169..c563da4244da 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -4603,3 +4603,12 @@ Architectures: s390 This capability indicates that kvm will implement the interfaces to handle reset, migration and nested KVM for branch prediction blocking. The stfle facility 82 should not be provided to the guest without this capability. + +8.14 KVM_CAP_HYPERV_TLBFLUSH + +Architectures: x86 + +This capability indicates that KVM supports paravirtualized Hyper-V TLB Flush +hypercalls: +HvFlushVirtualAddressSpace, HvFlushVirtualAddressSpaceEx, +HvFlushVirtualAddressList, HvFlushVirtualAddressListEx. |