powerpc/numa: Use ibm,architecture-vec-5 to detect form 1 affinity
I've been told that the architected way to determine we are in form 1 affinity mode is by reading the ibm,architecture-vec-5 property which mirrors the layout of the fifth vector of the ibm,client-architecture structure. Eventually we may want to parse the ibm,architecture-vec-5 and create FW_FEATURE_* bits. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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@ -271,7 +271,8 @@ static int __init find_min_common_depth(void)
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const unsigned int *ref_points;
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struct device_node *rtas_root;
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unsigned int len;
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struct device_node *options;
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struct device_node *chosen;
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const char *vec5;
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rtas_root = of_find_node_by_path("/rtas");
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@ -289,14 +290,17 @@ static int __init find_min_common_depth(void)
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"ibm,associativity-reference-points", &len);
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/*
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* For type 1 affinity information we want the first field
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* For form 1 affinity information we want the first field
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*/
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options = of_find_node_by_path("/options");
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if (options) {
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const char *str;
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str = of_get_property(options, "ibm,associativity-form", NULL);
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if (str && !strcmp(str, "1"))
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index = 0;
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#define VEC5_AFFINITY_BYTE 5
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#define VEC5_AFFINITY 0x80
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chosen = of_find_node_by_path("/chosen");
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if (chosen) {
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vec5 = of_get_property(chosen, "ibm,architecture-vec-5", NULL);
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if (vec5 && (vec5[VEC5_AFFINITY_BYTE] & VEC5_AFFINITY)) {
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dbg("Using form 1 affinity\n");
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index = 0;
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}
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}
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if ((len >= 2 * sizeof(unsigned int)) && ref_points) {
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