| Message ID | 1403667127-1622-1-git-send-email-qiudayu@linux.vnet.ibm.com |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Jun 24, 2014 at 11:32:07PM -0400, Mike Qiu wrote: [ cc Richard ] >Eeh sysfs entry created must be after EEH_ENABLED been set >in eeh_subsystem_flags. > >In PowerNV platform, it try to create sysfs entry before >EEH_ENABLED been set, when boot up. So nothing will be >created for eeh in sysfs. > Could you please make the commit log more clear? :-) I guess the issue is introduced by commit 2213fb1 (" powerpc/eeh: Skip eeh sysfs when eeh is disabled"). The commit checks EEH is enabled while creating PCI device EEH sysfs files. If not, the sysfs files won't be created. That's to avoid warning reported during PCI hotplug. The problem you're reporting (if I understand completely): You don't see the sysfs files after the system boots up. If it's the case, you probably need following changes in arch/powerpc/platforms/powernv/pci.c::pnv_pci_ioda_fixup(). Could you have a try with it? #ifdef CONFIG_EEH eeh_probe_mode_set(EEH_PROBE_MODE_DEV); - eeh_addr_cache_build(); eeh_init(); + eeh_addr_cache_build(); #endif Eventually PowerNV/pSeries have same function call sequence: - Set EEH probe mode - Doing probe (with device node or PCI device) - Build address cache. >Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> >--- > arch/powerpc/platforms/powernv/eeh-ioda.c | 3 +++ > 1 file changed, 3 insertions(+) > >diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c >index 8ad0c5b..5f95581 100644 >--- a/arch/powerpc/platforms/powernv/eeh-ioda.c >+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c >@@ -136,6 +136,9 @@ static int ioda_eeh_post_init(struct pci_controller *hose) > struct pnv_phb *phb = hose->private_data; > int ret; > >+ /* Creat sysfs after EEH_ENABLED been set */ >+ eeh_add_sysfs_files(hose->bus); >+ > /* Register OPAL event notifier */ > if (!ioda_eeh_nb_init) { > ret = opal_notifier_register(&ioda_eeh_nb); Thanks, Gavin -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Jun 25, 2014 at 03:33:12PM +1000, Gavin Shan wrote: >On Tue, Jun 24, 2014 at 11:32:07PM -0400, Mike Qiu wrote: > >[ cc Richard ] > >>Eeh sysfs entry created must be after EEH_ENABLED been set >>in eeh_subsystem_flags. >> >>In PowerNV platform, it try to create sysfs entry before >>EEH_ENABLED been set, when boot up. So nothing will be >>created for eeh in sysfs. >> > >Could you please make the commit log more clear? :-) > >I guess the issue is introduced by commit 2213fb1 (" >powerpc/eeh: Skip eeh sysfs when eeh is disabled"). The >commit checks EEH is enabled while creating PCI device >EEH sysfs files. If not, the sysfs files won't be created. >That's to avoid warning reported during PCI hotplug. > >The problem you're reporting (if I understand completely): >You don't see the sysfs files after the system boots up. >If it's the case, you probably need following changes in >arch/powerpc/platforms/powernv/pci.c::pnv_pci_ioda_fixup(). >Could you have a try with it? > >#ifdef CONFIG_EEH > eeh_probe_mode_set(EEH_PROBE_MODE_DEV); >- eeh_addr_cache_build(); > eeh_init(); >+ eeh_addr_cache_build(); >#endif > I think this is a more proper fix. BTW, I have one confusion in this mode set. eeh_init() -> eeh_ops->dev_probe() -> powernv_eeh_dev_probe() -> eeh_set_enable(true) <- here the eeh is marked enabled We can see this flag would be set for each pci_dev. So is it possible to make this "set" only once? >Eventually PowerNV/pSeries have same function call sequence: > >- Set EEH probe mode >- Doing probe (with device node or PCI device) >- Build address cache. > >>Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> >>--- >> arch/powerpc/platforms/powernv/eeh-ioda.c | 3 +++ >> 1 file changed, 3 insertions(+) >> >>diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c >>index 8ad0c5b..5f95581 100644 >>--- a/arch/powerpc/platforms/powernv/eeh-ioda.c >>+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c >>@@ -136,6 +136,9 @@ static int ioda_eeh_post_init(struct pci_controller *hose) >> struct pnv_phb *phb = hose->private_data; >> int ret; >> >>+ /* Creat sysfs after EEH_ENABLED been set */ >>+ eeh_add_sysfs_files(hose->bus); >>+ >> /* Register OPAL event notifier */ >> if (!ioda_eeh_nb_init) { >> ret = opal_notifier_register(&ioda_eeh_nb); > >Thanks, >Gavin
On Wed, Jun 25, 2014 at 02:23:53PM +0800, Wei Yang wrote: >On Wed, Jun 25, 2014 at 03:33:12PM +1000, Gavin Shan wrote: >>On Tue, Jun 24, 2014 at 11:32:07PM -0400, Mike Qiu wrote: >> >>[ cc Richard ] >> >>>Eeh sysfs entry created must be after EEH_ENABLED been set >>>in eeh_subsystem_flags. >>> >>>In PowerNV platform, it try to create sysfs entry before >>>EEH_ENABLED been set, when boot up. So nothing will be >>>created for eeh in sysfs. >>> >> >>Could you please make the commit log more clear? :-) >> >>I guess the issue is introduced by commit 2213fb1 (" >>powerpc/eeh: Skip eeh sysfs when eeh is disabled"). The >>commit checks EEH is enabled while creating PCI device >>EEH sysfs files. If not, the sysfs files won't be created. >>That's to avoid warning reported during PCI hotplug. >> >>The problem you're reporting (if I understand completely): >>You don't see the sysfs files after the system boots up. >>If it's the case, you probably need following changes in >>arch/powerpc/platforms/powernv/pci.c::pnv_pci_ioda_fixup(). >>Could you have a try with it? >> >>#ifdef CONFIG_EEH >> eeh_probe_mode_set(EEH_PROBE_MODE_DEV); >>- eeh_addr_cache_build(); >> eeh_init(); >>+ eeh_addr_cache_build(); >>#endif >> > >I think this is a more proper fix. > >BTW, I have one confusion in this mode set. > >eeh_init() > -> eeh_ops->dev_probe() > -> powernv_eeh_dev_probe() > -> eeh_set_enable(true) <- here the eeh is marked enabled > >We can see this flag would be set for each pci_dev. So is it possible to make >this "set" only once? > It shouldn't be a problem because there might not have PCI devices supporting EEH in the guest. All PCI devices are emulated. >>Eventually PowerNV/pSeries have same function call sequence: >> >>- Set EEH probe mode >>- Doing probe (with device node or PCI device) >>- Build address cache. >> >>>Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> >>>--- >>> arch/powerpc/platforms/powernv/eeh-ioda.c | 3 +++ >>> 1 file changed, 3 insertions(+) >>> >>>diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c >>>index 8ad0c5b..5f95581 100644 >>>--- a/arch/powerpc/platforms/powernv/eeh-ioda.c >>>+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c >>>@@ -136,6 +136,9 @@ static int ioda_eeh_post_init(struct pci_controller *hose) >>> struct pnv_phb *phb = hose->private_data; >>> int ret; >>> >>>+ /* Creat sysfs after EEH_ENABLED been set */ >>>+ eeh_add_sysfs_files(hose->bus); >>>+ >>> /* Register OPAL event notifier */ >>> if (!ioda_eeh_nb_init) { >>> ret = opal_notifier_register(&ioda_eeh_nb); Thanks, Gavin -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c index 8ad0c5b..5f95581 100644 --- a/arch/powerpc/platforms/powernv/eeh-ioda.c +++ b/arch/powerpc/platforms/powernv/eeh-ioda.c @@ -136,6 +136,9 @@ static int ioda_eeh_post_init(struct pci_controller *hose) struct pnv_phb *phb = hose->private_data; int ret; + /* Creat sysfs after EEH_ENABLED been set */ + eeh_add_sysfs_files(hose->bus); + /* Register OPAL event notifier */ if (!ioda_eeh_nb_init) { ret = opal_notifier_register(&ioda_eeh_nb);
Eeh sysfs entry created must be after EEH_ENABLED been set in eeh_subsystem_flags. In PowerNV platform, it try to create sysfs entry before EEH_ENABLED been set, when boot up. So nothing will be created for eeh in sysfs. Signed-off-by: Mike Qiu <qiudayu@linux.vnet.ibm.com> --- arch/powerpc/platforms/powernv/eeh-ioda.c | 3 +++ 1 file changed, 3 insertions(+)