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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 /drivers/clk/versatile/Kconfig | |
| 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 'drivers/clk/versatile/Kconfig')
| -rw-r--r-- | drivers/clk/versatile/Kconfig | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/clk/versatile/Kconfig b/drivers/clk/versatile/Kconfig new file mode 100644 index 000000000..403f16495 --- /dev/null +++ b/drivers/clk/versatile/Kconfig @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0-only + +menu "Clock driver for ARM Reference designs" + depends on HAS_IOMEM + depends on ARM || ARM64 || COMPILE_TEST + +config CLK_ICST + bool "Clock driver for ARM Reference designs ICST" + select REGMAP_MMIO + help + Supports clocking on ARM Reference designs: + - Integrator/AP and Integrator/CP + - RealView PB1176, EB, PB11MP and PBX + +config CLK_SP810 + bool "Clock driver for ARM SP810 System Controller" + default y if (ARCH_VEXPRESS && ARM) + help + Supports clock muxing (REFCLK/TIMCLK to TIMERCLKEN0-3) capabilities + of the ARM SP810 System Controller cell. + +config CLK_VEXPRESS_OSC + tristate "Clock driver for Versatile Express OSC clock generators" + depends on VEXPRESS_CONFIG + select REGMAP_MMIO + default y if ARCH_VEXPRESS + help + Simple regmap-based driver driving clock generators on Versatile + Express platforms hidden behind its configuration infrastructure, + commonly known as OSCs. + +endmenu |