Update arch/csr/H/vsscratch.yaml

Co-authored-by: Paul Clarke <[email protected]>
Signed-off-by: Shehroz Kashif <[email protected]>

Author: Shehrozkashif

spec/std/isa/csr/H/vsscratch.yaml

@@ -9,12 +9,27 @@ name: vsscratch
 address: 0x240
 virtual_address: 0x140
 long_name: Virtual Supervisor Scratch Register
-description: |
-  The vsscratch register is a VSXLEN-bit read/write register that is VS-mode’s version of
-  supervisor register sscratch. When V=1, vsscratch substitutes for the usual sscratch,
-  so instructions that normally read or modify sscratch actually access vsscratch instead.
-  The contents of vsscratch never directly affect the behavior of the machine.
+description:
+  - id: csr-vsscratch-purpose
+    normative: true
+    text: |
+      The vsscratch register is a VSXLEN-bit read/write register that is VS-mode’s version of
+      supervisor register sscratch. When V=1, vsscratch substitutes for the usual sscratch,
+      so instructions that normally read or modify sscratch actually access vsscratch instead.
+
+  - id: csr-vsscratch-effect
+    normative: true
+    text: |
+      The contents of vsscratch never directly affect the behavior of the machine.
 priv_mode: VS
 length: VSXLEN
 definedBy: H
-fields: {}
+fields:
+  SCRATCH:
+    type: RW
+    reset_value: 0
+    location_rv32: 31-0
+    location_rv64: 63-0
+    description: |
+      Virtual supervisor scratch register.
+