Allow overriding gfx version per-node

This lets you run two unsupported-but-really-supported cards of different architecture together in the same program. Works great w/ llama.cpp on my 7900XT + 6600.

Example usage (device 0 is RDNA3, device 1 is RDNA2):

HSA_OVERRIDE_GFX_VERSION_1="11.0.0" HSA_OVERRIDE_GFX_VERSION_2="10.3.0" ollama serve

Change-Id: Ic63ef462f698dee722d360f7fc3ef72789c277b7
Signed-off-by: AdamNiederer
Signed-off-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Chris Freehill <cfreehil@amd.com>


[ROCm/ROCR-Runtime commit: 84567b6416]

projects/rocr-runtime/libhsakmt/src/topology.c

@@ -1064,6 +1064,7 @@ static HSAKMT_STATUS topology_sysfs_get_node_props(uint32_t node_id,
 	char *read_buf, *p, *envvar, dummy = '\0';
 	char prop_name[256];
 	char path[256];
+	char per_node_override[32];
 	unsigned long long prop_val = 0;
 	uint32_t prog, major = 0, minor = 0, step = 0;
 	int read_size;
@@ -1210,8 +1211,8 @@ static HSAKMT_STATUS topology_sysfs_get_node_props(uint32_t node_id,
 
 	hsa_gfxip = find_hsa_gfxip_device(props->DeviceId, gfxv_major);
 	if (hsa_gfxip || gfxv) {
-		envvar = getenv("HSA_OVERRIDE_GFX_VERSION");
-		if (envvar) {
+		snprintf(per_node_override, sizeof(per_node_override), "HSA_OVERRIDE_GFX_VERSION_%d", node_id);
+		if ((envvar = getenv(per_node_override)) || (envvar = getenv("HSA_OVERRIDE_GFX_VERSION"))) {
 			/* HSA_OVERRIDE_GFX_VERSION=major.minor.stepping */
 			if ((sscanf(envvar, "%u.%u.%u%c",
 					&major, &minor, &step, &dummy) != 3) ||