diff options
| author | Eric Hankland <ehankland@google.com> | 2019-07-10 18:25:15 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2019-07-11 15:08:28 +0200 |
| commit | 66bb8a065f5aedd4551d8d3fbce582972f65c2e1 (patch) | |
| tree | e91f4895073a3f406a02037637d8ac27ee5c4d9b /Documentation/hwmon | |
| parent | cdc238eb72f6b94b6c33b98c07b9fc3ac5e57b18 (diff) | |
| download | linux-66bb8a065f5aedd4551d8d3fbce582972f65c2e1.tar.gz linux-66bb8a065f5aedd4551d8d3fbce582972f65c2e1.tar.bz2 linux-66bb8a065f5aedd4551d8d3fbce582972f65c2e1.zip | |
KVM: x86: PMU Event Filter
Some events can provide a guest with information about other guests or the
host (e.g. L3 cache stats); providing the capability to restrict access
to a "safe" set of events would limit the potential for the PMU to be used
in any side channel attacks. This change introduces a new VM ioctl that
sets an event filter. If the guest attempts to program a counter for
any blacklisted or non-whitelisted event, the kernel counter won't be
created, so any RDPMC/RDMSR will show 0 instances of that event.
Signed-off-by: Eric Hankland <ehankland@google.com>
[Lots of changes. All remaining bugs are probably mine. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Documentation/hwmon')
0 files changed, 0 insertions, 0 deletions