Commit d46b4c1c authored by Andi Kleen's avatar Andi Kleen Committed by Thomas Gleixner

perf/x86/intel/uncore: Cache logical pkg id in uncore driver

The SNB-EP uncore driver is the only user of topology_phys_to_logical_pkg
in a performance critical path.

Change it query the logical pkg ID only once at initialization time and
then cache it in box structure. This allows to change the logical package
management without affecting the performance critical path.
Signed-off-by: default avatarAndi Kleen <ak@linux.intel.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPrarit Bhargava <prarit@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Kan Liang <kan.liang@intel.com>
Cc: He Chen <he.chen@linux.intel.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Piotr Luc <piotr.luc@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arvind Yadav <arvind.yadav.cs@gmail.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Mathias Krause <minipli@googlemail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Link: https://lkml.kernel.org/r/20171114124257.22013-2-prarit@redhat.com
parent 4ee2ec1b
......@@ -975,10 +975,10 @@ static void uncore_pci_remove(struct pci_dev *pdev)
int i, phys_id, pkg;
phys_id = uncore_pcibus_to_physid(pdev->bus);
pkg = topology_phys_to_logical_pkg(phys_id);
box = pci_get_drvdata(pdev);
if (!box) {
pkg = topology_phys_to_logical_pkg(phys_id);
for (i = 0; i < UNCORE_EXTRA_PCI_DEV_MAX; i++) {
if (uncore_extra_pci_dev[pkg].dev[i] == pdev) {
uncore_extra_pci_dev[pkg].dev[i] = NULL;
......@@ -994,7 +994,7 @@ static void uncore_pci_remove(struct pci_dev *pdev)
return;
pci_set_drvdata(pdev, NULL);
pmu->boxes[pkg] = NULL;
pmu->boxes[box->pkgid] = NULL;
if (atomic_dec_return(&pmu->activeboxes) == 0)
uncore_pmu_unregister(pmu);
uncore_box_exit(box);
......
......@@ -100,7 +100,7 @@ struct intel_uncore_extra_reg {
struct intel_uncore_box {
int pci_phys_id;
int pkgid;
int pkgid; /* Logical package ID */
int n_active; /* number of active events */
int n_events;
int cpu; /* cpu to collect events */
......
......@@ -1057,7 +1057,7 @@ static void snbep_qpi_enable_event(struct intel_uncore_box *box, struct perf_eve
if (reg1->idx != EXTRA_REG_NONE) {
int idx = box->pmu->pmu_idx + SNBEP_PCI_QPI_PORT0_FILTER;
int pkg = topology_phys_to_logical_pkg(box->pci_phys_id);
int pkg = box->pkgid;
struct pci_dev *filter_pdev = uncore_extra_pci_dev[pkg].dev[idx];
if (filter_pdev) {
......
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