[PATCH v2 2/2] docs: fusa: Add the requirements for some of the commands of XEN_VERSION

[Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>]

We have written the requirements for some of the commands of the XEN_VERSION
hypercall.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
---
Changes from -

v1 - 1. Reworded the requirement so as to avoid mentioining variable names
or hardcoded strings. Otherwise, one would need to change the requirement
each time the code changes.

 .../fusa/reqs/design-reqs/arm64/hypercall.rst |  6 +-
 .../design-reqs/arm64/version_hypercall.rst   | 34 ++++++++
 .../reqs/design-reqs/version_hypercall.rst    | 65 +++++++++++++++
 docs/fusa/reqs/index.rst                      |  2 +
 .../reqs/product-reqs/version_hypercall.rst   | 83 +++++++++++++++++++
 5 files changed, 187 insertions(+), 3 deletions(-)
 create mode 100644 docs/fusa/reqs/design-reqs/arm64/version_hypercall.rst
 create mode 100644 docs/fusa/reqs/design-reqs/version_hypercall.rst

diff --git a/docs/fusa/reqs/design-reqs/arm64/hypercall.rst 
b/docs/fusa/reqs/design-reqs/arm64/hypercall.rst
index ffd883260c..b6f99af023 100644
--- a/docs/fusa/reqs/design-reqs/arm64/hypercall.rst
+++ b/docs/fusa/reqs/design-reqs/arm64/hypercall.rst
@@ -28,8 +28,8 @@ Parameters
 `XenSwdgn~arm64_hyp_param~1`
 
 Description:
-Xen shall use x0 to read the first parameter, x1 for second parameter and so
-on, for domain hypercall requests.
+Xen shall use the first register to read the first parameter, second register
+for second parameter and so on, for domain hypercall requests.
 
 Rationale:
 
@@ -45,7 +45,7 @@ Return value
 `XenSwdgn~arm64_ret_val~1`
 
 Description:
-Xen shall store the return value in x0 register.
+Xen shall store the return value in first register.
 
 Rationale:
 
diff --git a/docs/fusa/reqs/design-reqs/arm64/version_hypercall.rst 
b/docs/fusa/reqs/design-reqs/arm64/version_hypercall.rst
new file mode 100644
index 0000000000..3aa12ea2c2
--- /dev/null
+++ b/docs/fusa/reqs/design-reqs/arm64/version_hypercall.rst
@@ -0,0 +1,34 @@
+.. SPDX-License-Identifier: CC-BY-4.0
+
+Capabilities
+------------
+
+`XenSwdgn~arm64_capabilities~1`
+
+Description:
+Xen shall have an internal constant string to denote that the cpu is running
+in arm64 mode.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_capabilities_cmd~1`
+
+Capabilities AArch32
+--------------------
+
+`XenSwdgn~arm64_capabilities_aarch32~1`
+
+Description:
+Xen shall have a internal constant string to denote that the cpu is running in
+arm32 mode.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_capabilities_cmd~1`
+
diff --git a/docs/fusa/reqs/design-reqs/version_hypercall.rst 
b/docs/fusa/reqs/design-reqs/version_hypercall.rst
new file mode 100644
index 0000000000..edc5672e83
--- /dev/null
+++ b/docs/fusa/reqs/design-reqs/version_hypercall.rst
@@ -0,0 +1,65 @@
+.. SPDX-License-Identifier: CC-BY-4.0
+
+Version
+-------
+
+`XenSwdgn~version~1`
+
+Description:
+Xen shall have a internal constant (XEN_VERSION) storing the version number
+coming from the Makefile.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_version_cmd~1`
+
+Subversion
+----------
+
+`XenSwdgn~subversion~1`
+
+Description:
+Xen shall have a internal constant (XEN_SUBVERSION) storing the sub version
+number coming from the Makefile.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_version_cmd~1`
+
+Extraversion
+------------
+
+`XenSwdgn~extraversion~1`
+
+Description:
+Xen shall have a internal constant (XEN_EXTRAVERSION) storing the extraversion
+coming from the build environment.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_extraversion_cmd~1`
+
+Changeset
+---------
+
+`XenSwdgn~changeset~1`
+
+Description:
+Xen shall have a internal constant string (XEN_CHANGESET) storing the date,
+time and git hash of the last change made to Xen's codebase.
+
+Rationale:
+
+Comments:
+
+Covers:
+ - `XenProd~version_hyp_changeset_cmd~1`
diff --git a/docs/fusa/reqs/index.rst b/docs/fusa/reqs/index.rst
index d8683edce7..b85af19d19 100644
--- a/docs/fusa/reqs/index.rst
+++ b/docs/fusa/reqs/index.rst
@@ -14,3 +14,5 @@ Requirements documentation
    design-reqs/arm64/generic-timer
    design-reqs/arm64/sbsa-uart
    design-reqs/arm64/hypercall
+   design-reqs/arm64/version_hypercall
+   design-reqs/version_hypercall
diff --git a/docs/fusa/reqs/product-reqs/version_hypercall.rst 
b/docs/fusa/reqs/product-reqs/version_hypercall.rst
index 03221f70c3..ae72b22556 100644
--- a/docs/fusa/reqs/product-reqs/version_hypercall.rst
+++ b/docs/fusa/reqs/product-reqs/version_hypercall.rst
@@ -54,6 +54,89 @@ Rationale:
 
 Comments:
 
+Covers:
+ - `XenMkt~version_hypercall~1`
+
+Needs:
+ - XenSwdgn
+
+Version command
+---------------
+
+`XenProd~version_hyp_version_cmd~1`
+
+Description:
+Xen shall provide a command (num 0) for  hypercall (num 17) to retrieve Xen's
+version in the domain's register 0.
+
+Rationale:
+
+Comments:
+Xen version is composed of major and minor number.
+
+Covers:
+ - `XenMkt~version_hypercall~1`
+
+Needs:
+ - XenSwdgn
+
+Extraversion command
+--------------------
+
+`XenProd~version_hyp_extraversion_cmd~1`
+
+Description:
+Xen shall provide a command (num 1) for hypercall (num 17) to copy its
+extraversion in the domain's buffer.
+
+Rationale:
+
+Comments:
+Xen's extra version consists of a string passed with 'XEN_VENDORVERSION' 
command
+line parameter while building Xen.
+
+Covers:
+ - `XenMkt~version_hypercall~1`
+
+Needs:
+ - XenSwdgn
+
+Capabilities command
+--------------------
+
+`XenProd~version_hyp_capabilities_cmd~1`
+
+Description:
+Xen shall provide a command (num 3) for hypercall (num 17) to copy its
+capabilities to the domain's buffer.
+
+Rationale:
+
+Comments:
+Capabilities related information is represented by char[1024].
+For Arm64, the capabilities should contain "xen-3.0-aarch64" string.
+
+Covers:
+ - `XenMkt~version_hypercall~1`
+
+Needs:
+ - XenSwdgn
+
+Changeset command
+-----------------
+
+`XenProd~version_hyp_changeset_cmd~1`
+
+Description:
+Xen shall provide a command (num 4) for hypercall (num 17) to copy changeset
+to the domain's buffer.
+
+Rationale:
+
+Comments:
+Changeset is string denoting the date, time and git hash of the last change
+made to Xen's codebase.
+
 Covers:
  - `XenMkt~version_hypercall~1`
 
-- 
2.25.1