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Message-Id: <20251222-k3-basic-dt-v2-10-3af3f3cd0f8a@riscstar.com>
Date: Mon, 22 Dec 2025 21:04:20 +0800
From: Guodong Xu <guodong@...cstar.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <pjw@...nel.org>,
Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>,
Alexandre Ghiti <alex@...ti.fr>, Yixun Lan <dlan@...too.org>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Samuel Holland <samuel.holland@...ive.com>,
Anup Patel <anup@...infault.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>, Lubomir Rintel <lkundrak@...sk>,
Yangyu Chen <cyy@...self.name>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
Conor Dooley <conor@...nel.org>, Heinrich Schuchardt <xypron.glpk@....de>,
Kevin Meng Zhang <zhangmeng.kevin@...ux.spacemit.com>,
Anup Patel <anup@...infault.org>, Andrew Jones <ajones@...tanamicro.com>,
devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
linux-kernel@...r.kernel.org, spacemit@...ts.linux.dev,
linux-serial@...r.kernel.org, Guodong Xu <guodong@...cstar.com>
Subject: [PATCH v2 10/13] dt-bindings: riscv: Add Sha and its comprised
extensions
Add descriptions for the Sha extension and the seven extensions it
comprises: Shcounterenw, Shgatpa, Shtvala, Shvsatpa, Shvstvala, Shvstvecd,
and Ssstateen.
Sha is ratified in the RVA23 Profiles Version 1.0 (commit 0273f3c921b6
"rva23/rvb23 ratified") as a new profile-defined extension that captures
the full set of features that are mandated to be supported along with
the H extension.
Extensions Shcounterenw, Shgatpa, Shtvala, Shvsatpa, Shvstvala, Shvstvecd,
and Ssstateen are ratified in the RISC-V Profiles Version 1.0 (commit
b1d806605f87 "Updated to ratified state").
The requirement status for Sha and its comprised extension in RISC-V
Profiles are:
- Sha: Mandatory in RVA23S64
- H: Optional in RVA22S64; Mandatory in RVA23S64
- Shcounterenw: Optional in RVA22S64; Mandatory in RVA23S64
- Shgatpa: Optional in RVA22S64; Mandatory in RVA23S64
- Shtvala: Optional in RVA22S64; Mandatory in RVA23S64
- Shvsatpa: Optional in RVA22S64; Mandatory in RVA23S64
- Shvstvala: Optional in RVA22S64; Mandatory in RVA23S64
- Shvstvecd: Optional in RVA22S64; Mandatory in RVA23S64
- Ssstateen: Optional in RVA22S64; Mandatory in RVA23S64
Add schema checks to enforce that Sha implies the presence of all its
comprised extensions.
Signed-off-by: Guodong Xu <guodong@...cstar.com>
---
v2: New patch.
---
.../devicetree/bindings/riscv/extensions.yaml | 79 ++++++++++++++++++++++
1 file changed, 79 insertions(+)
diff --git a/Documentation/devicetree/bindings/riscv/extensions.yaml b/Documentation/devicetree/bindings/riscv/extensions.yaml
index ed7a88c0ab3b7dc7ad4a4d2fd300d6fb33ef050c..1066b7e65dab89704dbac449db4aa5605c95b9d3 100644
--- a/Documentation/devicetree/bindings/riscv/extensions.yaml
+++ b/Documentation/devicetree/bindings/riscv/extensions.yaml
@@ -128,6 +128,57 @@ properties:
version of the privileged ISA specification.
# multi-letter extensions, sorted alphanumerically
+ - const: sha
+ description: |
+ The standard Sha extension for augmented hypervisor extension as
+ ratified in RVA23 Profiles Version 1.0, with commit 0273f3c921b6
+ ("rva23/rvb23 ratified").
+
+ Sha captures the full set of features that are mandated to be
+ supported along with the H extension. Sha comprises the following
+ extensions: H, Shcounterenw, Shgatpa, Shtvala, Shvsatpa, Shvstvala,
+ Shvstvecd, and Ssstateen.
+
+ - const: shcounterenw
+ description: |
+ The standard Shcounterenw extension for support writable enables
+ in hcounteren for any supported counter, as ratified in RISC-V
+ Profiles Version 1.0, with commit b1d806605f87 ("Updated to
+ ratified state.")
+
+ - const: shgatpa
+ description: |
+ The standard Shgatpa extension indicates that for each supported
+ virtual memory scheme SvNN supported in satp, the corresponding
+ hgatp SvNNx4 mode must be supported. The hgatp mode Bare must
+ also be supported. It is ratified in RISC-V Profiles Version 1.0,
+ with commit b1d806605f87 ("Updated to ratified state.")
+
+ - const: shtvala
+ description: |
+ The standard Shtvala extension for htval be written with the
+ faulting guest physical address in all circumstances permitted by
+ the ISA. It is ratified in RISC-V Profiles Version 1.0, with
+ commit b1d806605f87 ("Updated to ratified state.")
+
+ - const: shvsatpa
+ description: |
+ The standard Shvsatpa extension for vsatp supporting all translation
+ modes supported in satp, as ratified in RISC-V Profiles Version 1.0,
+ with commit b1d806605f87 ("Updated to ratified state.")
+
+ - const: shvstvala
+ description: |
+ The standard Shvstvala extension for vstval provides all needed
+ values as ratified in RISC-V Profiles Version 1.0, with commit
+ b1d806605f87 ("Updated to ratified state.")
+
+ - const: shvstvecd
+ description: |
+ The standard Shvstvecd extension for vstvec supporting Direct mode,
+ as ratified in RISC-V Profiles Version 1.0, with commit b1d806605f87
+ ("Updated to ratified state.")
+
- const: smaia
description: |
The standard Smaia supervisor-level extension for the advanced
@@ -186,6 +237,12 @@ properties:
ratified at commit d70011dde6c2 ("Update to ratified state")
of riscv-j-extension.
+ - const: ssstateen
+ description: |
+ The standard Ssstateen extension for supervisor-mode view of the
+ state-enable extension, as ratified in RISC-V Profiles Version 1.0,
+ with commit b1d806605f87 ("Updated to ratified state.")
+
- const: sstc
description: |
The standard Sstc supervisor-level extension for time compare as
@@ -813,6 +870,28 @@ properties:
const: zbb
- contains:
const: zbs
+ # sha comprises the following extensions
+ - if:
+ contains:
+ const: sha
+ then:
+ allOf:
+ - contains:
+ const: h
+ - contains:
+ const: shcounterenw
+ - contains:
+ const: shgatpa
+ - contains:
+ const: shtvala
+ - contains:
+ const: shvsatpa
+ - contains:
+ const: shvstvala
+ - contains:
+ const: shvstvecd
+ - contains:
+ const: ssstateen
# Zcb depends on Zca
- if:
contains:
--
2.43.0
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