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 --- drivers/mfd/madera.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 drivers/mfd/madera.h (limited to 'drivers/mfd/madera.h') diff --git a/drivers/mfd/madera.h b/drivers/mfd/madera.h new file mode 100644 index 000000000..900205678 --- /dev/null +++ b/drivers/mfd/madera.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * MFD internals for Cirrus Logic Madera codecs + * + * Copyright 2015-2018 Cirrus Logic + */ + +#ifndef MADERA_MFD_H +#define MADERA_MFD_H + +#include +#include + +struct madera; + +extern const struct dev_pm_ops madera_pm_ops; +extern const struct of_device_id madera_of_match[]; + +int madera_dev_init(struct madera *madera); +int madera_dev_exit(struct madera *madera); + +const char *madera_name_from_type(enum madera_type type); + +extern const struct regmap_config cs47l15_16bit_spi_regmap; +extern const struct regmap_config cs47l15_32bit_spi_regmap; +extern const struct regmap_config cs47l15_16bit_i2c_regmap; +extern const struct regmap_config cs47l15_32bit_i2c_regmap; +int cs47l15_patch(struct madera *madera); + +extern const struct regmap_config cs47l35_16bit_spi_regmap; +extern const struct regmap_config cs47l35_32bit_spi_regmap; +extern const struct regmap_config cs47l35_16bit_i2c_regmap; +extern const struct regmap_config cs47l35_32bit_i2c_regmap; +int cs47l35_patch(struct madera *madera); + +extern const struct regmap_config cs47l85_16bit_spi_regmap; +extern const struct regmap_config cs47l85_32bit_spi_regmap; +extern const struct regmap_config cs47l85_16bit_i2c_regmap; +extern const struct regmap_config cs47l85_32bit_i2c_regmap; +int cs47l85_patch(struct madera *madera); + +extern const struct regmap_config cs47l90_16bit_spi_regmap; +extern const struct regmap_config cs47l90_32bit_spi_regmap; +extern const struct regmap_config cs47l90_16bit_i2c_regmap; +extern const struct regmap_config cs47l90_32bit_i2c_regmap; +int cs47l90_patch(struct madera *madera); + +extern const struct regmap_config cs47l92_16bit_spi_regmap; +extern const struct regmap_config cs47l92_32bit_spi_regmap; +extern const struct regmap_config cs47l92_16bit_i2c_regmap; +extern const struct regmap_config cs47l92_32bit_i2c_regmap; +int cs47l92_patch(struct madera *madera); + +#endif -- cgit v1.3.1