[PATCH v5 11/12] doc/man: update description for nr_spis with eSPI

[Leonid Komarianskyi <Leonid_Komarianskyi@xxxxxxxx>]

Since eSPI support has been introduced, update the documentation with
the appropriate description.

Signed-off-by: Leonid Komarianskyi <leonid_komarianskyi@xxxxxxxx>

---
The discussion is ongoing and can be addressed in V5.
Clarification is needed from the maintainers.
Link:
- https://lore.kernel.org/xen-devel/87y0r4z717.fsf@xxxxxxxx/

Changes in V5:
- no changes

Changes in V4:
- introduced this patch
---
 docs/man/xl.cfg.5.pod.in | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index 5362fb0e9a..292ab10331 100644
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -3072,11 +3072,14 @@ interval of colors (such as "0-4").
 =item B<nr_spis="NR_SPIS">
 
 An optional integer parameter specifying the number of SPIs (Shared
-Peripheral Interrupts) to allocate for the domain. Max is 960 SPIs. If
-the `nr_spis` parameter is not specified, the value calculated by the toolstack
-will be used for the domain. Otherwise, the value specified by the `nr_spis`
-parameter will be used. The number of SPIs should match the highest interrupt
-ID that will be assigned to the domain.
+Peripheral Interrupts) to allocate for the domain. Max is 960 for regular SPIs
+or 5088 for eSPIs (Extended SPIs). The eSPIs includes an additional 1024 SPIs
+from the eSPI range (4096 to 5119) if the hardware supports extended SPIs
+(GICv3.1+) and CONFIG_GICV3_ESPI is enabled. If the `nr_spis` parameter is not
+specified, the value calculated by the toolstack will be used for the domain.
+Otherwise, the value specified by the `nr_spis` parameter will be used. The
+number of SPIs should match the highest interrupt ID that will be assigned to
+the domain.
 
 =item B<trap_unmapped_accesses=BOOLEAN>
 
-- 
2.34.1