vgsp: m100 - scan every const-bank page for data VAs; data PTEs kind 0 by default

The +0x880 trap instruction disassembles (nvdisasm on the m98b prologue
bytes) to LDG.E.U8.CONSTANT.SYS R5, [R2.64+UR4] with UR4 = c[0x4][0x0] -
the first global load's base comes from const bank 4, not the c[0x0] param
page the m99 scan covered. svc_gr_data_fill now scans every bank page the
launch carries (QMD words 32..47, even LO words: banks 0..7), deduping up
to 16 windows. Data PTEs use the gr_pte_kind param (default 0 = the kind
proven SM-visible via the const reads) instead of a hardcoded 6.

1 files changed, 35 insertions, 30 deletions

diff --git a/kernel/gsp_sema_service.c b/kernel/gsp_sema_service.c
index 0e93058..6dd0c7e 100644
--- a/kernel/gsp_sema_service.c
+++ b/kernel/gsp_sema_service.c
@@ -9531,44 +9531,49 @@ static bool svc_gr_page_inline_covers(u64 page)
  */
 static void svc_gr_data_fill(struct nv_vgpu_device *vgpu)
 {
-	const struct svc_gr_page *pp = NULL;
-	u64 wins[8];
+	u64 wins[16];
 	u32 n_win = 0;
-	u64 param_hpa = 0;
 	u32 off = 0, i, w;
-	const u8 *page;
 	u8 kind;
 
 	svc_fwd_req.gr_n_data = 0;
+	/*
+	 * m100: scan every const-bank page the launch carries (QMD words
+	 * 32..47 are the bank LO/HI pairs; the demo's LDG.E base comes from
+	 * c[0x4][0x0], not from the c[0x0] param page). Each page's first
+	 * 2 KB is scanned for plausible device VAs.
+	 */
 	for (i = 0; i < svc_fwd_req.gr_n_pages; i++) {
-		if (svc_fwd_req.gr_pages[i].qmd_word == 32 &&
-		    svc_fwd_req.gr_pages[i].pa) {
-			pp = &svc_fwd_req.gr_pages[i];
-			break;
-		}
-	}
-	if (!pp)
-		return;
-	kind = (pp->ap == SVC_APERTURE_FB) ? SVC_APERTURE_FB :
-					     SVC_APERTURE_SYS;
-	if (svc_fwd_operand_hpa(vgpu, kind, pp->pa, 0, SEMA_PAGE_SIZE,
-				&param_hpa, &off) || off)
-		return;
-	page = (const u8 *)__va(param_hpa);
-	if (!page)
-		return;
-	for (i = 0; i < 256; i++) {
-		u64 v = get_unaligned_le64(page + i * 8);
-		u64 wv;
+		const struct svc_gr_page *pp = &svc_fwd_req.gr_pages[i];
+		u64 hpa = 0;
+		const u8 *page;
+		u32 k;
 
-		if (v < 0x10000000ULL || v >= (1ULL << 47) || (v & 3))
+		if (pp->qmd_word < 32 || pp->qmd_word > 47 ||
+		    (pp->qmd_word & 1) || !pp->pa)
 			continue;
-		wv = v & ~0x1fffffULL;
-		for (w = 0; w < n_win; w++)
-			if (wins[w] == wv)
-				break;
-		if (w == n_win && n_win < ARRAY_SIZE(wins))
-			wins[n_win++] = wv;
+		kind = (pp->ap == SVC_APERTURE_FB) ? SVC_APERTURE_FB :
+						     SVC_APERTURE_SYS;
+		if (svc_fwd_operand_hpa(vgpu, kind, pp->pa, 0,
+					SEMA_PAGE_SIZE, &hpa, &off) || off)
+			continue;
+		page = (const u8 *)__va(hpa);
+		if (!page)
+			continue;
+		for (k = 0; k < 256; k++) {
+			u64 v = get_unaligned_le64(page + k * 8);
+			u64 wv;
+
+			if (v < 0x10000000ULL || v >= (1ULL << 47) ||
+			    (v & 3))
+				continue;
+			wv = v & ~0x1fffffULL;
+			for (w = 0; w < n_win; w++)
+				if (wins[w] == wv)
+					break;
+			if (w == n_win && n_win < ARRAY_SIZE(wins))
+				wins[n_win++] = wv;
+		}
 	}
 	for (w = 0; w < n_win; w++) {
 		int wi;