> -----Original Message----- > From: Alexey Kardashevskiy [mailto:a...@ozlabs.ru] > Sent: Monday, August 12, 2013 7:44 PM > To: Bhushan Bharat-R65777 > Cc: b...@kernel.crashing.org; linuxppc-dev@lists.ozlabs.org > Subject: Re: Powerpc: Kernel warn_on when enabling IOMMU_API > > On 08/12/2013 08:20 PM, Bhushan Bharat-R65777 wrote: > > And this simple fix work for me > > diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c > > index b20ff17..8869b0d 100644 > > --- a/arch/powerpc/kernel/iommu.c > > +++ b/arch/powerpc/kernel/iommu.c > > @@ -48,6 +48,8 @@ > > #include <asm/vio.h> > > #include <asm/tce.h> > > > > +#define DEBUG > > + > > #define DBG(...) > > > > static int novmerge; > > @@ -871,7 +873,7 @@ void iommu_free_coherent(struct iommu_table *tbl, size_t > size, > > } > > } > > > > -#ifdef CONFIG_IOMMU_API > > +#ifdef SPAPR_TCE_IOMMU > > /* > > * SPAPR TCE API > > */ > > ---------------------- > > > And with this fix, what does "ls -laR /sys/kernel/iommu_groups/" print?
It shows the list of group id and respective devices: root@p5040ds:~# ls -laR /sys/kernel/iommu_groups/ /sys/kernel/iommu_groups/: total 0 drwxr-xr-x 15 root root 0 Sep 6 01:42 . drwxr-xr-x 6 root root 0 Jan 1 1970 .. drwxr-xr-x 3 root root 0 Sep 6 01:43 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 1 drwxr-xr-x 3 root root 0 Sep 6 01:43 10 drwxr-xr-x 3 root root 0 Sep 6 01:43 11 drwxr-xr-x 3 root root 0 Sep 6 01:43 12 drwxr-xr-x 3 root root 0 Sep 6 01:43 2 drwxr-xr-x 3 root root 0 Sep 6 01:43 3 drwxr-xr-x 3 root root 0 Sep 6 01:43 4 drwxr-xr-x 3 root root 0 Sep 6 01:43 5 drwxr-xr-x 3 root root 0 Sep 6 01:43 6 drwxr-xr-x 3 root root 0 Sep 6 01:43 7 drwxr-xr-x 3 root root 0 Sep 6 01:43 8 drwxr-xr-x 3 root root 0 Sep 6 01:43 9 /sys/kernel/iommu_groups/0: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/0/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe100300.dma -> ../../../../devices/ffe000000.soc/ffe100300.dma /sys/kernel/iommu_groups/1: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/1/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe101300.dma -> ../../../../devices/ffe000000.soc/ffe101300.dma /sys/kernel/iommu_groups/10: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/10/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe302000.jr -> ../../../../devices/ffe000000.soc/ffe300000.crypto/ffe302000.jr /sys/kernel/iommu_groups/11: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/11/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe303000.jr -> ../../../../devices/ffe000000.soc/ffe300000.crypto/ffe303000.jr /sys/kernel/iommu_groups/12: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/12/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe304000.jr -> ../../../../devices/ffe000000.soc/ffe300000.crypto/ffe304000.jr /sys/kernel/iommu_groups/2: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/2/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe114000.sdhc -> ../../../../devices/ffe000000.soc/ffe114000.sdhc /sys/kernel/iommu_groups/3: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/3/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe210000.usb -> ../../../../devices/ffe000000.soc/ffe210000.usb /sys/kernel/iommu_groups/4: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/4/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe211000.usb -> ../../../../devices/ffe000000.soc/ffe211000.usb /sys/kernel/iommu_groups/5: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/5/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe220000.sata -> ../../../../devices/ffe000000.soc/ffe220000.sata /sys/kernel/iommu_groups/6: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/6/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe221000.sata -> ../../../../devices/ffe000000.soc/ffe221000.sata /sys/kernel/iommu_groups/7: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/7/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 0001:00:00.0 -> ../../../../devices/ffe201000.pcie/pci0001:00/0001:00:00.0 lrwxrwxrwx 1 root root 0 Sep 6 01:43 0001:01:00.0 -> ../../../../devices/ffe201000.pcie/pci0001:00/0001:00:00.0/0001:01:00.0 /sys/kernel/iommu_groups/8: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/8/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 ffe301000.jr -> ../../../../devices/ffe000000.soc/ffe300000.crypto/ffe301000.jr /sys/kernel/iommu_groups/9: total 0 drwxr-xr-x 3 root root 0 Sep 6 01:43 . drwxr-xr-x 15 root root 0 Sep 6 01:42 .. drwxr-xr-x 2 root root 0 Sep 6 01:43 devices /sys/kernel/iommu_groups/9/devices: total 0 drwxr-xr-x 2 root root 0 Sep 6 01:43 . drwxr-xr-x 3 root root 0 Sep 6 01:43 .. lrwxrwxrwx 1 root root 0 Sep 6 01:43 0000:00:00.0 -> ../../../../devices/ffe200000.pcie/pci0000:00/0000:00:00.0 lrwxrwxrwx 1 root root 0 Sep 6 01:43 0000:01:00.0 -> ../../../../devices/ffe200000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0 -Bharat > > > > -- > Alexey _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
