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ANDROID: KVM: arm64: Remove DEBUG dependency to PKVM_STACKTRACE

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Now pKVM prefaults the entire host stage-2, reading the stacktrace on
panic will not trigger any fault. Also, the stacktrace copy is only
"leaking" PC values to EL1. The PKVM_STACKTRACE option is therefore a
safe option for production. Allow turning it on without PKVM_DEBUG.

Bug: 357781595
Change-Id: Ie16dbdf948355f449ddbe830a875ce248e686e79
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
This commit is contained in:
Vincent Donnefort
2025-02-24 11:01:39 +00:00
parent 3b1d8cc5a2
commit 265f4173a2
1 changed files with 12 additions and 12 deletions
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24
arch/arm64/kvm/Kconfig
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@@ -61,6 +61,18 @@ config PTDUMP_STAGE2_DEBUGFS
If in doubt, say N.
config PKVM_STACKTRACE
bool "Protected KVM hypervisor stacktraces"
default n
help
Say Y here to enable pKVM hypervisor stacktraces on hyp_panic()
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, or not using protected nVHE (pKVM), say N.
config PKVM_MODULE_PATH
string "Path to pKVM modules"
default ""
@@ -117,18 +129,6 @@ config PKVM_FTRACE
If unsure, Say N.
config PKVM_STACKTRACE
bool "Protected KVM hypervisor stacktraces"
default y
help
Say Y here to enable pKVM hypervisor stacktraces on hyp_panic()
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, or not using protected nVHE (pKVM), say N.
config PKVM_DISABLE_STAGE2_ON_PANIC
bool "Disable the host stage-2 on panic"
default n