diff options
| author | Sean Christopherson <seanjc@google.com> | 2023-10-18 12:36:17 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-11-30 12:51:14 -0800 |
| commit | 770d6aa2e416fd26f0356e258c77a37574ad9b8c (patch) | |
| tree | 157c1317e0d9bca133d64f8003c39115d0c426f2 /scripts/gcc-plugins | |
| parent | 176bfc5b17fee327585583a427e2857d9dfd8f68 (diff) | |
KVM: SVM: Explicitly require FLUSHBYASID to enable SEV support
Add a sanity check that FLUSHBYASID is available if SEV is supported in
hardware, as SEV (and beyond) guests are bound to a single ASID, i.e. KVM
can't "flush" by assigning a new, fresh ASID to the guest. If FLUSHBYASID
isn't supported for some bizarre reason, KVM would completely fail to do
TLB flushes for SEV+ guests (see pre_svm_run() and pre_sev_run()).
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20231018193617.1895752-1-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'scripts/gcc-plugins')
0 files changed, 0 insertions, 0 deletions