[RFC PATCH 10/12] lib: utils: fdt_domain: parse per-domain WID properties

Extends __fdt_parse_domain() to parse next-wid (32-bit WID) and
next-widlist (64-bit delegation mask) from domain DT nodes. Enables
per-domain World ID configuration. Stores in sbi_domain structure
for mlwid/mwiddeleg CSR programming during domain context switches.

Signed-off-by: Yu-Chien Peter Lin <[email protected]>
---
 lib/utils/fdt/fdt_domain.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/lib/utils/fdt/fdt_domain.c b/lib/utils/fdt/fdt_domain.c
index 61627db3..0849c4d0 100644
--- a/lib/utils/fdt/fdt_domain.c
+++ b/lib/utils/fdt/fdt_domain.c
@@ -469,6 +469,21 @@ static int __fdt_parse_domain(const void *fdt, int domain_offset, void *opaque)
 	}
 	dom->next_mode = val32;
 
+	/* Read "next-wid" DT property */
+	val = fdt_getprop(fdt, domain_offset, "next-wid", &len);
+	if (val && len == sizeof(fdt32_t)) {
+		dom->next_wid = fdt32_to_cpu(val[0]);
+		dom->has_next_wid = true;
+	}
+
+	/* Read "next-widlist" DT property */
+	val = fdt_getprop(fdt, domain_offset, "next-widlist", &len);
+	if (val && (len == (2 * sizeof(fdt32_t)))) {
+		val64 = fdt32_to_cpu(val[0]);
+		val64 = (val64 << 32) | fdt32_to_cpu(val[1]);
+		dom->next_widlist = val64;
+	}
+
 	/* Read "system-reset-allowed" DT property */
 	if (fdt_get_property(fdt, domain_offset,
 			     "system-reset-allowed", NULL))
-- 
2.43.7


-- 
opensbi mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/opensbi