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>

1 files changed, 202 insertions, 0 deletions

diff --git a/sound/firewire/Kconfig b/sound/firewire/Kconfig
new file mode 100644
index 000000000..5973c25c2
--- /dev/null
+++ b/sound/firewire/Kconfig
@@ -0,0 +1,202 @@
+# SPDX-License-Identifier: GPL-2.0-only
+menuconfig SND_FIREWIRE
+	bool "FireWire sound devices"
+	depends on FIREWIRE
+	default y
+	help
+	  Support for IEEE-1394/FireWire/iLink sound devices.
+
+if SND_FIREWIRE && FIREWIRE
+
+config SND_FIREWIRE_LIB
+	tristate
+	select SND_PCM
+	select SND_RAWMIDI
+
+config SND_DICE
+	tristate "DICE-based DACs support"
+	select SND_HWDEP
+	select SND_FIREWIRE_LIB
+	help
+	  Say Y here to include support for devices based on the DICE chip family
+	  (DICE-II/TCD2210(Mini)/TCD2220(Jr.)) which TC Applied Technologies (TCAT) produced.
+	   * Allen and Heath Zed R16
+	   * Alesis iO 14/26 FireWire, MasterControl, MultiMix 8/12/16 FireWire
+	   * Avid Mbox 3 Pro
+	   * FlexRadio Systems FLEX-3000, FLEX-5000
+	   * Focusrite Liquid Saffire 56
+	   * Focusrite Saffire Pro 14, Pro 24, Pro 24 DSP, Pro 26, Pro 40(TCD2220)
+	   * Harman Music Group Lexicon I-ONIX FW810S
+	   * Loud Technologies Mackie Onyx Blackbird, Onyx 820i/1220i/1620i/1640i (latter models)
+	   * M-Audio ProFire 610/2626
+	   * Mytek Stereo192-DSD DAC
+	   * Midas Klark Teknik VeniceF series
+	   * PreSonus FireStudio, FireStudio Mobile, FireStudio Project, FireStudio Tube
+	   * PreSonus StudioLive 16.4.2, 16.0.2, 24.4.2, 32.4.2
+	   * Solid State Logic Duende Classic, Duende Mini
+	   * TC Electronic Studio Konnekt 48, Konnekt 24D, Konnekt Live, Impact Twin
+	   * TC Electronic Digital Konnekt x32, Desktop Konnekt 6
+	   * Weiss Engineering ADC2, Vesta, Minerva, AFI1, DAC1, INT202, DAC202
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-dice.
+
+config SND_OXFW
+	tristate "Oxford Semiconductor FW970/971 chipset support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	  Say Y here to include support for FireWire devices based on
+	  Oxford Semiconductor FW970/971 chipset.
+	   * Griffin Firewave
+	   * LaCie Firewire Speakers
+	   * Behringer F-Control Audio 202
+	   * Mackie(Loud) Onyx-i series (former models)
+	   * Mackie(Loud) Onyx 1640i (former model)
+	   * Mackie(Loud) Onyx Satellite
+	   * Mackie(Loud) Tapco Link.Firewire
+	   * Mackie(Loud) d.2 pro/d.4 pro (built-in FireWire card with OXFW971 ASIC)
+	   * Mackie(Loud) U.420/U.420d
+	   * TASCAM FireOne
+	   * Stanton Controllers & Systems 1 Deck/Mixer
+	   * APOGEE duet FireWire
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-oxfw.
+
+config SND_ISIGHT
+	tristate "Apple iSight microphone"
+	select SND_FIREWIRE_LIB
+	help
+	  Say Y here to include support for the front and rear microphones
+	  of the Apple iSight web camera.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-isight.
+
+config SND_FIREWORKS
+	tristate "Echo Fireworks board module support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	  Say Y here to include support for FireWire devices based
+	  on Echo Digital Audio Fireworks board:
+	   * Mackie Onyx 400F/1200F
+	   * Echo AudioFire12/8(until 2009 July)
+	   * Echo AudioFire2/4/Pre8/8(since 2009 July)
+	   * Echo Fireworks 8/HDMI
+	   * Gibson Robot Interface Pack/GoldTop
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-fireworks.
+
+config SND_BEBOB
+	tristate "BridgeCo DM1000/DM1100/DM1500 with BeBoB firmware"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	 Say Y here to include support for FireWire devices based
+	 on BridgeCo DM1000/DM1100/DM1500 with BeBoB firmware:
+	  * Edirol FA-66/FA-101
+	  * PreSonus FIREBOX/FIREPOD/FP10/Inspire1394
+	  * BridgeCo RDAudio1/Audio5
+	  * Mackie Onyx 1220/1620/1640 (FireWire I/O Card)
+	  * Mackie d.2 (optional FireWire card with DM1000 ASIC)
+	  * Stanton FinalScratch 2 (ScratchAmp)
+	  * Tascam IF-FW/DM
+	  * Behringer XENIX UFX 1204/1604
+	  * Behringer Digital Mixer X32 series (X-UF Card)
+	  * Behringer FCA610/1616
+	  * Apogee Rosetta 200/400 (X-FireWire card)
+	  * Apogee DA/AD/DD-16X (X-FireWire card)
+	  * Apogee Ensemble
+	  * ESI QuataFire 610
+	  * AcousticReality eARMasterOne
+	  * CME MatrixKFW
+	  * Phonic Helix Board 12 MkII/18 MkII/24 MkII
+	  * Phonic Helix Board 12 Universal/18 Universal/24 Universal
+	  * Lynx Aurora 8/16 (LT-FW)
+	  * ICON FireXon
+	  * PrismSound Orpheus/ADA-8XR
+	  * TerraTec PHASE 24 FW/PHASE X24 FW/PHASE 88 Rack FW
+	  * TerraTec EWS MIC2/EWS MIC8
+	  * TerraTec Aureon 7.1 FireWire
+	  * Yamaha GO44/GO46
+	  * Focusrite Saffire/Saffire LE/SaffirePro10 IO/SaffirePro26 IO
+	  * M-Audio FireWire410/AudioPhile/Solo
+	  * M-Audio Ozonic/NRV10/ProfireLightBridge
+	  * M-Audio FireWire 1814/ProjectMix IO
+	  * Digidesign Mbox 2 Pro
+	  * ToneWeal FW66
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called snd-bebob.
+
+config SND_FIREWIRE_DIGI00X
+	tristate "Digidesign Digi 002/003 family support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	 Say Y here to include support for Digidesign Digi 002/003 family.
+	  * Digi 002 Console
+	  * Digi 002 Rack
+	  * Digi 003 Console
+	  * Digi 003 Rack
+	  * Digi 003 Rack+
+
+	 To compile this driver as a module, choose M here: the module
+	 will be called snd-firewire-digi00x.
+
+config SND_FIREWIRE_TASCAM
+	tristate "TASCAM FireWire series support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	 Say Y here to include support for TASCAM.
+	  * FW-1884
+	  * FW-1082
+	  * FW-1804
+
+	 To compile this driver as a module, choose M here: the module
+	 will be called snd-firewire-tascam.
+
+config SND_FIREWIRE_MOTU
+	tristate "Mark of the unicorn FireWire series support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	 Say Y here to enable support for FireWire devices which MOTU produced:
+	  * 828
+	  * 896
+	  * 828mk2
+	  * 896hd
+	  * Traveler
+	  * Ultralite
+	  * 8pre
+	  * 828mk3 (FireWire only)
+	  * 828mk3 (Hybrid)
+	  * 896mk3 (FireWire only)
+	  * 896mk3 (Hybrid)
+	  * Ultralite mk3 (FireWire only)
+	  * Ultralite mk3 (Hybrid)
+	  * Traveler mk3
+	  * Audio Express
+	  * Track 16
+	  * 4pre
+
+	 To compile this driver as a module, choose M here: the module
+	 will be called snd-firewire-motu.
+
+config SND_FIREFACE
+	tristate "RME Fireface series support"
+	select SND_FIREWIRE_LIB
+	select SND_HWDEP
+	help
+	 Say Y here to include support for RME fireface series.
+	  * Fireface 400
+	  * Fireface 800
+	  * Fireface UFX
+	  * Fireface UCX
+	  * Fireface 802
+
+endif # SND_FIREWIRE