diff options
| author |   Sean Christopherson <seanjc@google.com> | 2024-11-27 17:33:41 -0800 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-12-18 14:19:36 -0800 |
| commit | c829ccd4d9dc4a892e7c9ae032b87ac90ace2252 (patch) | |
| tree | c4943982fe263a2694235c739f557071dcda4396 /include/linux/bcma/ssh:/git@git.zx2c4.com | |
| parent | KVM: x86: Disallow KVM_CAP_X86_DISABLE_EXITS after vCPU creation (diff) | |
KVM: x86: Reject disabling of MWAIT/HLT interception when not allowed
Reject KVM_CAP_X86_DISABLE_EXITS if userspace attempts to disable MWAIT or
HLT exits and KVM previously reported (via KVM_CHECK_EXTENSION) that
disabling the exit(s) is not allowed. E.g. because MWAIT isn't supported
or the CPU doesn't have an always-running APIC timer, or because KVM is
configured to mitigate cross-thread vulnerabilities.
Cc: Kechen Lu <kechenl@nvidia.com>
Fixes: 4d5422cea3b6 ("KVM: X86: Provide a capability to disable MWAIT intercepts")
Fixes: 6f0f2d5ef895 ("KVM: x86: Mitigate the cross-thread return address predictions bug")
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20241128013424.4096668-15-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'include/linux/bcma/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions