spapr: introduce SpaprMachineState::numa_assoc_array

The next step to centralize all NUMA/associativity handling in
the spapr machine is to create a 'one stop place' for all
things ibm,associativity.

This patch introduces numa_assoc_array, a 2 dimensional array
that will store all ibm,associativity arrays of all NUMA nodes.
This array is initialized in a new spapr_numa_associativity_init()
function, called in spapr_machine_init(). It is being initialized
with the same values used in other ibm,associativity properties
around spapr files (i.e. all zeros, last value is node_id).
The idea is to remove all hardcoded definitions and FDT writes
of ibm,associativity arrays, doing instead a call to the new
helper spapr_numa_write_associativity_dt() helper, that will
be able to write the DT with the correct values.

We'll start small, handling the trivial cases first. The
remaining instances of ibm,associativity will be handled
next.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20200903220639.563090-2-danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index a1e230ad39..9a63380801 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -105,6 +105,16 @@ typedef enum {
 
 #define FDT_MAX_SIZE                    0x100000
 
+/*
+ * NUMA related macros. MAX_DISTANCE_REF_POINTS was taken
+ * from Taken from Linux kernel arch/powerpc/mm/numa.h.
+ *
+ * NUMA_ASSOC_SIZE is the base array size of an ibm,associativity
+ * array for any non-CPU resource.
+ */
+#define MAX_DISTANCE_REF_POINTS    4
+#define NUMA_ASSOC_SIZE            (MAX_DISTANCE_REF_POINTS + 1)
+
 typedef struct SpaprCapabilities SpaprCapabilities;
 struct SpaprCapabilities {
     uint8_t caps[SPAPR_CAP_NUM];
@@ -231,6 +241,8 @@ struct SpaprMachineState {
     unsigned gpu_numa_id;
     SpaprTpmProxy *tpm_proxy;
 
+    uint32_t numa_assoc_array[MAX_NODES][NUMA_ASSOC_SIZE];
+
     Error *fwnmi_migration_blocker;
 };