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authorLinus Torvalds <torvalds@linux-foundation.org>2024-11-30 14:51:08 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2024-11-30 14:51:08 -0800
commitc4bb3a2d641c02ac2c7aa45534b4cefdf9bf416b (patch)
tree2dcbf5fa7c0a28be5a92da62127c92729bd203c6 /Documentation
parent0ff86d8da707c5620cd8f363e88bf49a24730b52 (diff)
parent4d911c7abee56771b0219a9fbf0120d06bdc9c14 (diff)
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull more kvm updates from Paolo Bonzini: - ARM fixes - RISC-V Svade and Svadu (accessed and dirty bit) extension support for host and guest * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: riscv: selftests: Add Svade and Svadu Extension to get-reg-list test RISC-V: KVM: Add Svade and Svadu Extensions Support for Guest/VM dt-bindings: riscv: Add Svade and Svadu Entries RISC-V: Add Svade and Svadu Extensions Support KVM: arm64: Use MDCR_EL2.HPME to evaluate overflow of hyp counters KVM: arm64: Ignore PMCNTENSET_EL0 while checking for overflow status KVM: arm64: Mark set_sysreg_masks() as inline to avoid build failure KVM: arm64: vgic-its: Add stronger type-checking to the ITS entry sizes KVM: arm64: vgic: Kill VGIC_MAX_PRIVATE definition KVM: arm64: vgic: Make vgic_get_irq() more robust KVM: arm64: vgic-v3: Sanitise guest writes to GICR_INVLPIR
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/riscv/extensions.yaml28
1 files changed, 28 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index af7e5237b2c0..9c7dd7e75e0c 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -171,6 +171,34 @@ properties:
ratified at commit 3f9ed34 ("Add ability to manually trigger
workflow. (#2)") of riscv-time-compare.
+ - const: svade
+ description: |
+ The standard Svade supervisor-level extension for SW-managed PTE A/D
+ bit updates as ratified in the 20240213 version of the privileged
+ ISA specification.
+
+ Both Svade and Svadu extensions control the hardware behavior when
+ the PTE A/D bits need to be set. The default behavior for the four
+ possible combinations of these extensions in the device tree are:
+ 1) Neither Svade nor Svadu present in DT => It is technically
+ unknown whether the platform uses Svade or Svadu. Supervisor
+ software should be prepared to handle either hardware updating
+ of the PTE A/D bits or page faults when they need updated.
+ 2) Only Svade present in DT => Supervisor must assume Svade to be
+ always enabled.
+ 3) Only Svadu present in DT => Supervisor must assume Svadu to be
+ always enabled.
+ 4) Both Svade and Svadu present in DT => Supervisor must assume
+ Svadu turned-off at boot time. To use Svadu, supervisor must
+ explicitly enable it using the SBI FWFT extension.
+
+ - const: svadu
+ description: |
+ The standard Svadu supervisor-level extension for hardware updating
+ of PTE A/D bits as ratified in the 20240528 version of the
+ privileged ISA specification. Please refer to Svade dt-binding
+ description for more details.
+
- const: svinval
description:
The standard Svinval supervisor-level extension for fine-grained