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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2019-06-03 19:52:44 -0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-06-18 11:43:46 +0200 |
| commit | 2d5ba19bdfef4dd06add144eb04287ee98409f75 (patch) | |
| tree | 740184128ac3de9a538ef62a9d525c48ddf3712a /Documentation | |
| parent | fdb28619a8f033c13f5d9b9e8b5536bb6e68a2c3 (diff) | |
| download | linux-2d5ba19bdfef4dd06add144eb04287ee98409f75.tar.bz2 | |
kvm: x86: add host poll control msrs
Add an MSRs which allows the guest to disable
host polling (specifically the cpuidle-haltpoll,
when performing polling in the guest, disables
host side polling).
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/virtual/kvm/msr.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/virtual/kvm/msr.txt b/Documentation/virtual/kvm/msr.txt index f3f0d57ced8e..df1f4338b3ca 100644 --- a/Documentation/virtual/kvm/msr.txt +++ b/Documentation/virtual/kvm/msr.txt @@ -273,3 +273,12 @@ MSR_KVM_EOI_EN: 0x4b564d04 guest must both read the least significant bit in the memory area and clear it using a single CPU instruction, such as test and clear, or compare and exchange. + +MSR_KVM_POLL_CONTROL: 0x4b564d05 + Control host-side polling. + + data: Bit 0 enables (1) or disables (0) host-side HLT polling logic. + + KVM guests can request the host not to poll on HLT, for example if + they are performing polling themselves. + |