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s390x/pci: acceleration for getting S390pciState 

There are a number of places where the code needs to get the instance
of S390pciState. It calls object_resolve_path() every time. This
wastes a lot of time and leads to low performance. Thus we add
s390_get_phb() to improve it.

Because we always have a phb, we remove all return checkings in the
callers and add an assert in s390_get_phb() to make sure that phb is
getted successfully.

Signed-off-by: Yi Min Zhao <zyimin@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Yi Min Zhao 2016-05-13 14:58:14 +08:00 committed by Cornelia Huck
parent f7c40aa1e7
commit e7d336959b
1 changed files with 20 additions and 33 deletions
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53
hw/s390x/s390-pci-bus.c
View File

@ -29,6 +29,19 @@
do { } while (0)
#endif
static S390pciState *s390_get_phb(void)
{
static S390pciState *phb;
if (!phb) {
phb = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
assert(phb != NULL);
}
return phb;
}
int chsc_sei_nt2_get_event(void *res)
{
ChscSeiNt2Res *nt2_res = (ChscSeiNt2Res *)res;
@ -36,12 +49,7 @@ int chsc_sei_nt2_get_event(void *res)
PciCcdfErr *eccdf;
int rc = 1;
SeiContainer *sei_cont;
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
if (!s) {
return rc;
}
S390pciState *s = s390_get_phb();
sei_cont = QTAILQ_FIRST(&s->pending_sei);
if (sei_cont) {
@ -76,12 +84,7 @@ int chsc_sei_nt2_get_event(void *res)
int chsc_sei_nt2_have_event(void)
{
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
if (!s) {
return 0;
}
S390pciState *s = s390_get_phb();
return !QTAILQ_EMPTY(&s->pending_sei);
}
@ -90,12 +93,7 @@ S390PCIBusDevice *s390_pci_find_dev_by_fid(uint32_t fid)
{
S390PCIBusDevice *pbdev;
int i;
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
if (!s) {
return NULL;
}
S390pciState *s = s390_get_phb();
for (i = 0; i < PCI_SLOT_MAX; i++) {
pbdev = &s->pbdev[i];
@ -180,12 +178,7 @@ S390PCIBusDevice *s390_pci_find_dev_by_idx(uint32_t idx)
S390PCIBusDevice *pbdev;
int i;
int j = 0;
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
if (!s) {
return NULL;
}
S390pciState *s = s390_get_phb();
for (i = 0; i < PCI_SLOT_MAX; i++) {
pbdev = &s->pbdev[i];
@ -207,10 +200,9 @@ S390PCIBusDevice *s390_pci_find_dev_by_fh(uint32_t fh)
{
S390PCIBusDevice *pbdev;
int i;
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
S390pciState *s = s390_get_phb();
if (!s || !fh) {
if (!fh) {
return NULL;
}
@ -228,12 +220,7 @@ static void s390_pci_generate_event(uint8_t cc, uint16_t pec, uint32_t fh,
uint32_t fid, uint64_t faddr, uint32_t e)
{
SeiContainer *sei_cont;
S390pciState *s = S390_PCI_HOST_BRIDGE(
object_resolve_path(TYPE_S390_PCI_HOST_BRIDGE, NULL));
if (!s) {
return;
}
S390pciState *s = s390_get_phb();
sei_cont = g_malloc0(sizeof(SeiContainer));
sei_cont->fh = fh;