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| author | Sean Christopherson <seanjc@google.com> | 2026-09-23 09:37:21 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2026-09-26 00:39:55 -0400 |
| commit | 93de2a6a4b91b72607136dd656edf03fb399d27f (patch) | |
| tree | 9220c76eb23cb39a146fac9692ee69afa4aa3135 /net/mac80211/debugfs_netdev.h | |
| download | linux-stable-93de2a6a4b91b72607136dd656edf03fb399d27f.tar.gz linux-stable-93de2a6a4b91b72607136dd656edf03fb399d27f.zip | |
KVM: SEV: Do cache maintenance on the source VM during intra-host migrationgrafted
Manually perform cache maintenance on the source VM during intra-host
migration to ensure no stale data is left in CPU caches after the VM is
destroyed. Because the source VM is "converted" to a non-SEV VM, KVM's
memory reclaim flows won't trigger cache maintenance, e.g. when all guest
memory is reclaimed in response to detaching from the mmu_notifier.
Note, relying on the destination VM to do cache maintenance isn't an option
as KVM doesn't require identical guest memory configurations, i.e. the
source VM may have access to memory that the destination VM does not.
Enforcing equivalent memory configurations is infeasible, as it would
require a *deep* comparison of memslots, e.g. to verify that not only are
the memslot identical, but what the memslots point at is also identical.
Fixes: b56639318bb2 ("KVM: SEV: Add support for SEV intra host migration")
Cc: stable@vger.kernel.org
Reported-by: Stefan Teodorescu <fane@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20260923163721.1584779-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'net/mac80211/debugfs_netdev.h')
| -rw-r--r-- | net/mac80211/debugfs_netdev.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/net/mac80211/debugfs_netdev.h b/net/mac80211/debugfs_netdev.h new file mode 100644 index 000000000..a02ec0a41 --- /dev/null +++ b/net/mac80211/debugfs_netdev.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Portions: + * Copyright (C) 2023 Intel Corporation + */ +/* routines exported for debugfs handling */ + +#ifndef __IEEE80211_DEBUGFS_NETDEV_H +#define __IEEE80211_DEBUGFS_NETDEV_H + +#include "ieee80211_i.h" + +#ifdef CONFIG_MAC80211_DEBUGFS +void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata); +void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata); +void ieee80211_debugfs_recreate_netdev(struct ieee80211_sub_if_data *sdata, + bool mld_vif); + +void ieee80211_link_debugfs_add(struct ieee80211_link_data *link); +void ieee80211_link_debugfs_remove(struct ieee80211_link_data *link); + +void ieee80211_link_debugfs_drv_add(struct ieee80211_link_data *link); +void ieee80211_link_debugfs_drv_remove(struct ieee80211_link_data *link); +#else +static inline void ieee80211_debugfs_remove_netdev( + struct ieee80211_sub_if_data *sdata) +{} +static inline void ieee80211_debugfs_rename_netdev( + struct ieee80211_sub_if_data *sdata) +{} +static inline void ieee80211_debugfs_recreate_netdev( + struct ieee80211_sub_if_data *sdata, bool mld_vif) +{} +static inline void ieee80211_link_debugfs_add(struct ieee80211_link_data *link) +{} +static inline void ieee80211_link_debugfs_remove(struct ieee80211_link_data *link) +{} + +static inline void ieee80211_link_debugfs_drv_add(struct ieee80211_link_data *link) +{} +static inline void ieee80211_link_debugfs_drv_remove(struct ieee80211_link_data *link) +{} +#endif + +#endif /* __IEEE80211_DEBUGFS_NETDEV_H */ |