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KVM: arm64: Add PROTECTED_NVHE_STACKTRACE Kconfig

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This can be used to disable stacktrace for the protected KVM
nVHE hypervisor, in order to save on the associated memory usage.

This option is disabled by default, since protected KVM is not widely
used on platforms other than Android currently.

Signed-off-by: Kalesh Singh <kaleshsingh@google.com>
Reviewed-by: Fuad Tabba <tabba@google.com>
Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220726073750.3219117-13-kaleshsingh@google.com
This commit is contained in:
Kalesh Singh 2022-07-26 00:37:45 -07:00 committed by Marc Zyngier
parent 314a61dc31
commit 72adac1bd2
1 changed files with 15 additions and 0 deletions
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arch/arm64/kvm/Kconfig
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@ -46,6 +46,21 @@ menuconfig KVM
If unsure, say N.
config PROTECTED_NVHE_STACKTRACE
bool "Protected KVM hypervisor stacktraces"
depends on NVHE_EL2_DEBUG
default n
help
Say Y here to enable pKVM hypervisor stacktraces on hyp_panic()
If you are not using protected nVHE (pKVM), say N.
If using protected nVHE mode, but cannot afford the associated
memory cost (less than 0.75 page per CPU) of pKVM stacktraces,
say N.
If unsure, say N.
config NVHE_EL2_DEBUG
bool "Debug mode for non-VHE EL2 object"
depends on KVM