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>
---
v3: Reword as Marc suggested.
v2: Update nested value also
---
Documentation/admin-guide/kernel-parameters.txt | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1518343bbe22..ed92e207e9a0 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2740,17 +2740,21 @@
nvhe: Standard nVHE-based mode, without support for
protected guests.
- protected: nVHE-based mode with support for guests whose
- state is kept private from the host.
+ protected: Mode with support for guests whose state is
+ kept private from the host, using VHE or
+ nVHE depending on HW support.
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
- for the host. "nested" is experimental and should be
- used with extreme caution.
+ for the host. To force nVHE on VHE hardware, add
+ "arm64_sw.hvhe=0 id_aa64mmfr1.vh=0" to the
+ command-line.
+ "nested" is experimental and should be used with
+ extreme caution.
kvm-arm.vgic_v3_group0_trap=
[KVM,ARM,EARLY] Trap guest accesses to GICv3 group-0
--
2.47.0.163.g1226f6d8fa-goog
