From 93de2a6a4b91b72607136dd656edf03fb399d27f Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 23 Sep 2026 09:37:21 -0700 Subject: KVM: SEV: Do cache maintenance on the source VM during intra-host migration 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 Signed-off-by: Sean Christopherson Message-ID: <20260923163721.1584779-3-seanjc@google.com> Signed-off-by: Paolo Bonzini --- sound/firewire/fireface/ff.c | 266 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 266 insertions(+) create mode 100644 sound/firewire/fireface/ff.c (limited to 'sound/firewire/fireface/ff.c') diff --git a/sound/firewire/fireface/ff.c b/sound/firewire/fireface/ff.c new file mode 100644 index 000000000..13472822d --- /dev/null +++ b/sound/firewire/fireface/ff.c @@ -0,0 +1,266 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * ff.c - a part of driver for RME Fireface series + * + * Copyright (c) 2015-2017 Takashi Sakamoto + */ + +#include "ff.h" + +#define OUI_RME 0x000a35 + +MODULE_DESCRIPTION("RME Fireface series Driver"); +MODULE_AUTHOR("Takashi Sakamoto "); +MODULE_LICENSE("GPL"); + +static void name_card(struct snd_ff *ff) +{ + struct fw_device *fw_dev = fw_parent_device(ff->unit); + static const char *const names[] = { + [SND_FF_UNIT_VERSION_FF800] = "Fireface800", + [SND_FF_UNIT_VERSION_FF400] = "Fireface400", + [SND_FF_UNIT_VERSION_UFX] = "FirefaceUFX", + [SND_FF_UNIT_VERSION_UCX] = "FirefaceUCX", + [SND_FF_UNIT_VERSION_802] = "Fireface802", + }; + const char *name; + + name = names[ff->unit_version]; + + strscpy(ff->card->driver, "Fireface"); + strscpy(ff->card->shortname, name); + strscpy(ff->card->mixername, name); + snprintf(ff->card->longname, sizeof(ff->card->longname), + "RME %s, GUID %08x%08x at %s, S%d", name, + fw_dev->config_rom[3], fw_dev->config_rom[4], + dev_name(&ff->unit->device), 100 << fw_dev->max_speed); +} + +static void ff_card_free(struct snd_card *card) +{ + struct snd_ff *ff = card->private_data; + + snd_ff_stream_destroy_duplex(ff); + snd_ff_transaction_unregister(ff); + + kfree(ff->msg_parser); + + mutex_destroy(&ff->mutex); + fw_unit_put(ff->unit); +} + +static int snd_ff_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry) +{ + struct snd_card *card; + struct snd_ff *ff; + int err; + + err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*ff), &card); + if (err < 0) + return err; + card->private_free = ff_card_free; + + ff = card->private_data; + ff->unit = fw_unit_get(unit); + dev_set_drvdata(&unit->device, ff); + ff->card = card; + + mutex_init(&ff->mutex); + spin_lock_init(&ff->lock); + init_waitqueue_head(&ff->hwdep_wait); + + ff->unit_version = entry->version; + ff->spec = entry->driver_data_ptr; + + err = snd_ff_transaction_register(ff); + if (err < 0) + goto error; + + name_card(ff); + + err = snd_ff_stream_init_duplex(ff); + if (err < 0) + goto error; + + snd_ff_proc_init(ff); + + err = snd_ff_create_midi_devices(ff); + if (err < 0) + goto error; + + err = snd_ff_create_pcm_devices(ff); + if (err < 0) + goto error; + + err = snd_ff_create_hwdep_devices(ff); + if (err < 0) + goto error; + + if (ff->spec->protocol->msg_parser_size > 0) { + ff->msg_parser = kzalloc(ff->spec->protocol->msg_parser_size, GFP_KERNEL); + if (!ff->msg_parser) { + err = -ENOMEM; + goto error; + } + } + + err = snd_card_register(card); + if (err < 0) + goto error; + + return 0; +error: + snd_card_free(card); + return err; +} + +static void snd_ff_update(struct fw_unit *unit) +{ + struct snd_ff *ff = dev_get_drvdata(&unit->device); + + snd_ff_transaction_reregister(ff); + + snd_ff_stream_update_duplex(ff); +} + +static void snd_ff_remove(struct fw_unit *unit) +{ + struct snd_ff *ff = dev_get_drvdata(&unit->device); + + // Block till all of ALSA character devices are released. + snd_card_free(ff->card); +} + +static const struct snd_ff_spec spec_ff800 = { + .pcm_capture_channels = {28, 20, 12}, + .pcm_playback_channels = {28, 20, 12}, + .midi_in_ports = 1, + .midi_out_ports = 1, + .protocol = &snd_ff_protocol_ff800, + .midi_high_addr = 0x000200000320ull, + .midi_addr_range = 12, + .midi_rx_addrs = {0x000080180000ull, 0}, +}; + +static const struct snd_ff_spec spec_ff400 = { + .pcm_capture_channels = {18, 14, 10}, + .pcm_playback_channels = {18, 14, 10}, + .midi_in_ports = 2, + .midi_out_ports = 2, + .protocol = &snd_ff_protocol_ff400, + .midi_high_addr = 0x0000801003f4ull, + .midi_addr_range = SND_FF_MAXIMIM_MIDI_QUADS * 4, + .midi_rx_addrs = {0x000080180000ull, 0x000080190000ull}, +}; + +static const struct snd_ff_spec spec_ucx = { + .pcm_capture_channels = {18, 14, 12}, + .pcm_playback_channels = {18, 14, 12}, + .midi_in_ports = 2, + .midi_out_ports = 2, + .protocol = &snd_ff_protocol_latter, + .midi_high_addr = 0xffff00000034ull, + .midi_addr_range = 0x80, + .midi_rx_addrs = {0xffff00000030ull, 0xffff00000030ull}, +}; + +static const struct snd_ff_spec spec_ufx_802 = { + .pcm_capture_channels = {30, 22, 14}, + .pcm_playback_channels = {30, 22, 14}, + .midi_in_ports = 1, + .midi_out_ports = 1, + .protocol = &snd_ff_protocol_latter, + .midi_high_addr = 0xffff00000034ull, + .midi_addr_range = 0x80, + .midi_rx_addrs = {0xffff00000030ull, 0xffff00000030ull}, +}; + +static const struct ieee1394_device_id snd_ff_id_table[] = { + /* Fireface 800 */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_RME, + .specifier_id = OUI_RME, + .version = SND_FF_UNIT_VERSION_FF800, + .model_id = 0x101800, + .driver_data_ptr = &spec_ff800, + }, + /* Fireface 400 */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_RME, + .specifier_id = OUI_RME, + .version = SND_FF_UNIT_VERSION_FF400, + .model_id = 0x101800, + .driver_data_ptr = &spec_ff400, + }, + // Fireface UFX. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_RME, + .specifier_id = OUI_RME, + .version = SND_FF_UNIT_VERSION_UFX, + .model_id = 0x101800, + .driver_data_ptr = &spec_ufx_802, + }, + // Fireface UCX. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_RME, + .specifier_id = OUI_RME, + .version = SND_FF_UNIT_VERSION_UCX, + .model_id = 0x101800, + .driver_data_ptr = &spec_ucx, + }, + // Fireface 802. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_SPECIFIER_ID | + IEEE1394_MATCH_VERSION | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_RME, + .specifier_id = OUI_RME, + .version = SND_FF_UNIT_VERSION_802, + .model_id = 0x101800, + .driver_data_ptr = &spec_ufx_802, + }, + {} +}; +MODULE_DEVICE_TABLE(ieee1394, snd_ff_id_table); + +static struct fw_driver ff_driver = { + .driver = { + .owner = THIS_MODULE, + .name = KBUILD_MODNAME, + .bus = &fw_bus_type, + }, + .probe = snd_ff_probe, + .update = snd_ff_update, + .remove = snd_ff_remove, + .id_table = snd_ff_id_table, +}; + +static int __init snd_ff_init(void) +{ + return driver_register(&ff_driver.driver); +} + +static void __exit snd_ff_exit(void) +{ + driver_unregister(&ff_driver.driver); +} + +module_init(snd_ff_init); +module_exit(snd_ff_exit); -- cgit v1.3.1