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/net/pcs/Kconfig | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 drivers/net/pcs/Kconfig (limited to 'drivers/net/pcs/Kconfig') diff --git a/drivers/net/pcs/Kconfig b/drivers/net/pcs/Kconfig new file mode 100644 index 000000000..e417fd66f --- /dev/null +++ b/drivers/net/pcs/Kconfig @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# PCS Layer Configuration +# + +menu "PCS device drivers" + +config PCS_XPCS + tristate "Synopsys DesignWare Ethernet XPCS" + select PHYLINK + help + This module provides a driver and helper functions for Synopsys + DesignWare XPCS controllers. + +config PCS_LYNX + tristate + help + This module provides helpers to phylink for managing the Lynx PCS + which is part of the Layerscape and QorIQ Ethernet SERDES. + +config PCS_MTK_LYNXI + tristate + select PHY_COMMON_PROPS + select REGMAP + help + This module provides helpers to phylink for managing the LynxI PCS + which is part of MediaTek's SoC and Ethernet switch ICs. + +config PCS_RZN1_MIIC + tristate "Renesas RZ/N1, RZ/N2H, RZ/T2H MII converter" + depends on OF + depends on ARCH_RENESAS || COMPILE_TEST + help + This module provides a driver for the MII converter available on + Renesas RZ/N1, RZ/N2H, and RZ/T2H SoCs. This PCS converts MII to + RMII/RGMII, or can be set in pass-through mode for MII. + +endmenu -- cgit v1.3.1