Commit 5053c3f0519c ("KVM: arm64: Use hVHE in pKVM by default on CPUs with
VHE support") modified the behaviour of "kvm-arm.mode=protected" without
the updating the kernel parameters doc.
Update it to match the current implementation.
Also, update required architecture version for nested virtualization as
suggested by Marc.
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Signed-off-by: Mostafa Saleh <smostafa@xxxxxxxxxx>
---
v2: Update nested value also
---
Documentation/admin-guide/kernel-parameters.txt | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1518343bbe22..d5b771e5cb5b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2740,12 +2740,16 @@
nvhe: Standard nVHE-based mode, without support for
protected guests.
- protected: nVHE-based mode with support for guests whose
+ protected: hVHE-based mode with support for guests whose
state is kept private from the host.
+ In case hVHE is not supported in hardware, it will
+ boot with protected nVHE.
+ nVHE protected mode can still be forced on VHE systems
+ using "kvm_arm.mode=protected arm64_sw.hvhe=0 id_aa64mmfr1.vh=0"
nested: VHE-based mode with support for nested
- virtualization. Requires at least ARMv8.3
- hardware.
+ virtualization. Requires at least ARMv8.4
+ hardware (with FEAT_NV2).
Defaults to VHE/nVHE based on hardware support. Setting
mode to "protected" will disable kexec and hibernation
--
2.47.0.105.g07ac214952-goog
