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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/pinctrl/actions/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/pinctrl/actions/Kconfig')
| -rw-r--r-- | drivers/pinctrl/actions/Kconfig | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/pinctrl/actions/Kconfig b/drivers/pinctrl/actions/Kconfig new file mode 100644 index 000000000..119f0e471 --- /dev/null +++ b/drivers/pinctrl/actions/Kconfig @@ -0,0 +1,32 @@ +# SPDX-License-Identifier: GPL-2.0-only +config PINCTRL_OWL + bool "Actions Semi OWL pinctrl driver" + depends on (ARCH_ACTIONS || COMPILE_TEST) && OF + select PINMUX + select PINCONF + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + help + Say Y here to enable Actions Semi OWL pinctrl driver + +config PINCTRL_S500 + bool "Actions Semi S500 pinctrl driver" + depends on ARM || COMPILE_TEST + depends on PINCTRL_OWL + help + Say Y here to enable Actions Semi S500 pinctrl driver + +config PINCTRL_S700 + bool "Actions Semi S700 pinctrl driver" + depends on ARM64 || COMPILE_TEST + depends on PINCTRL_OWL + help + Say Y here to enable Actions Semi S700 pinctrl driver + +config PINCTRL_S900 + bool "Actions Semi S900 pinctrl driver" + depends on ARM64 || COMPILE_TEST + depends on PINCTRL_OWL + help + Say Y here to enable Actions Semi S900 pinctrl driver |