diff options
| author | Alexander Antonov <alexander.antonov@linux.intel.com> | 2022-11-17 15:28:29 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-11-24 13:09:22 +0300 |
| commit | c4aebdb3b5f50fd0d83bf0fc2d49ac299f8b61df (patch) | |
| tree | 97db5ea0602a41e89bdb45a322677d124e968c3f /arch/x86/events/intel | |
| parent | 4cfce57fa42d277497cd2c425021312eae2f223c (diff) | |
| download | linux-c4aebdb3b5f50fd0d83bf0fc2d49ac299f8b61df.tar.xz | |
perf/x86/intel/uncore: Get UPI NodeID and GroupID
The GIDNIDMAP register of UBOX device is used to get the topology
information in the snbep_pci2phy_map_init(). The same approach will be
used to discover UPI topology for ICX and SPR platforms.
Move common code that will be reused in next patches.
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lore.kernel.org/r/20221117122833.3103580-8-alexander.antonov@linux.intel.com
Diffstat (limited to 'arch/x86/events/intel')
| -rw-r--r-- | arch/x86/events/intel/uncore_snbep.c | 33 |
1 files changed, 25 insertions, 8 deletions
diff --git a/arch/x86/events/intel/uncore_snbep.c b/arch/x86/events/intel/uncore_snbep.c index f682a9a0f562..6da5f692afea 100644 --- a/arch/x86/events/intel/uncore_snbep.c +++ b/arch/x86/events/intel/uncore_snbep.c @@ -1372,6 +1372,28 @@ static struct pci_driver snbep_uncore_pci_driver = { #define NODE_ID_MASK 0x7 +/* Each three bits from 0 to 23 of GIDNIDMAP register correspond Node ID. */ +#define GIDNIDMAP(config, id) (((config) >> (3 * (id))) & 0x7) + +static int upi_nodeid_groupid(struct pci_dev *ubox_dev, int nodeid_loc, int idmap_loc, + int *nodeid, int *groupid) +{ + int ret; + + /* get the Node ID of the local register */ + ret = pci_read_config_dword(ubox_dev, nodeid_loc, nodeid); + if (ret) + goto err; + + *nodeid = *nodeid & NODE_ID_MASK; + /* get the Node ID mapping */ + ret = pci_read_config_dword(ubox_dev, idmap_loc, groupid); + if (ret) + goto err; +err: + return ret; +} + /* * build pci bus to socket mapping */ @@ -1397,13 +1419,8 @@ static int snbep_pci2phy_map_init(int devid, int nodeid_loc, int idmap_loc, bool * the topology. */ if (nr_node_ids <= 8) { - /* get the Node ID of the local register */ - err = pci_read_config_dword(ubox_dev, nodeid_loc, &config); - if (err) - break; - nodeid = config & NODE_ID_MASK; - /* get the Node ID mapping */ - err = pci_read_config_dword(ubox_dev, idmap_loc, &config); + err = upi_nodeid_groupid(ubox_dev, nodeid_loc, idmap_loc, + &nodeid, &config); if (err) break; @@ -1421,7 +1438,7 @@ static int snbep_pci2phy_map_init(int devid, int nodeid_loc, int idmap_loc, bool * to a particular node. */ for (i = 0; i < 8; i++) { - if (nodeid == ((config >> (3 * i)) & 0x7)) { + if (nodeid == GIDNIDMAP(config, i)) { if (topology_max_die_per_package() > 1) die_id = i; else |