sema-svc: copy-watch also logs dst8_after (write-effect check)

1 files changed, 17 insertions, 0 deletions

diff --git a/kernel/gsp_sema_service.c b/kernel/gsp_sema_service.c
index 8a60b6e..bafe5c1 100644
--- a/kernel/gsp_sema_service.c
+++ b/kernel/gsp_sema_service.c
@@ -2088,6 +2088,23 @@ static int svc_copy(struct nv_vgpu_device *vgpu, u64 dst, u64 src, size_t total,
 		(void)i;
 		o += chunk;
 	}
+
+	if (gsp_sema_copy_watch && total == gsp_sema_copy_watch &&
+	    svc.copy_watch_log <= 64) {
+		u8 da[8] = {0};
+
+		if (dst_aperture == CE_APERTURE_VID) {
+			u8 *base = vgpu->bars[1].vaddr;
+
+			if (base && dst + 8 <= vgpu->bars[1].size)
+				memcpy(da, base + dst, 8);
+		} else {
+			svc_read(vgpu, dst, da, 8);
+		}
+		pr_info("sema-copy-watch: dst8_after=%02x %02x %02x %02x %02x %02x %02x %02x (dst=0x%llx)\n",
+			da[0], da[1], da[2], da[3], da[4], da[5], da[6],
+			da[7], dst);
+	}
 	return 0;
 }