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author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-07 15:50:34 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-07 15:50:34 (GMT) |
commit | f536b3cae84eb7c9f3495285ad048d13a397ed0b (patch) | |
tree | b53eee1c45eb080168786e2f103e76d6706cbbb0 /drivers/cpufreq | |
parent | e669830526a0abaf301bf408df69cde33901ac63 (diff) | |
parent | 537e5400a0a05c4efe70e7b372c19cfcd0179362 (diff) | |
download | linux-f536b3cae84eb7c9f3495285ad048d13a397ed0b.tar.xz |
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc updates from Ben Herrenschmidt:
"This is the powerpc new goodies for 3.17. The short story:
The biggest bit is Michael removing all of pre-POWER4 processor
support from the 64-bit kernel. POWER3 and rs64. This gets rid of a
ton of old cruft that has been bitrotting in a long while. It was
broken for quite a few versions already and nobody noticed. Nobody
uses those machines anymore. While at it, he cleaned up a bunch of
old dusty cabinets, getting rid of a skeletton or two.
Then, we have some base VFIO support for KVM, which allows assigning
of PCI devices to KVM guests, support for large 64-bit BARs on
"powernv" platforms, support for HMI (Hardware Management Interrupts)
on those same platforms, some sparse-vmemmap improvements (for memory
hotplug),
There is the usual batch of Freescale embedded updates (summary in the
merge commit) and fixes here or there, I think that's it for the
highlights"
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (102 commits)
powerpc/eeh: Export eeh_iommu_group_to_pe()
powerpc/eeh: Add missing #ifdef CONFIG_IOMMU_API
powerpc: Reduce scariness of interrupt frames in stack traces
powerpc: start loop at section start of start in vmemmap_populated()
powerpc: implement vmemmap_free()
powerpc: implement vmemmap_remove_mapping() for BOOK3S
powerpc: implement vmemmap_list_free()
powerpc: Fail remap_4k_pfn() if PFN doesn't fit inside PTE
powerpc/book3s: Fix endianess issue for HMI handling on napping cpus.
powerpc/book3s: handle HMIs for cpus in nap mode.
powerpc/powernv: Invoke opal call to handle hmi.
powerpc/book3s: Add basic infrastructure to handle HMI in Linux.
powerpc/iommu: Fix comments with it_page_shift
powerpc/powernv: Handle compound PE in config accessors
powerpc/powernv: Handle compound PE for EEH
powerpc/powernv: Handle compound PE
powerpc/powernv: Split ioda_eeh_get_state()
powerpc/powernv: Allow to freeze PE
powerpc/powernv: Enable M64 aperatus for PHB3
powerpc/eeh: Aux PE data for error log
...
Diffstat (limited to 'drivers/cpufreq')
-rw-r--r-- | drivers/cpufreq/powernv-cpufreq.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c index bb1d08d..379c083 100644 --- a/drivers/cpufreq/powernv-cpufreq.c +++ b/drivers/cpufreq/powernv-cpufreq.c @@ -28,6 +28,7 @@ #include <linux/of.h> #include <asm/cputhreads.h> +#include <asm/firmware.h> #include <asm/reg.h> #include <asm/smp.h> /* Required for cpu_sibling_mask() in UP configs */ @@ -98,7 +99,11 @@ static int init_powernv_pstates(void) return -ENODEV; } - WARN_ON(len_ids != len_freqs); + if (len_ids != len_freqs) { + pr_warn("Entries in ibm,pstate-ids and " + "ibm,pstate-frequencies-mhz does not match\n"); + } + nr_pstates = min(len_ids, len_freqs) / sizeof(u32); if (!nr_pstates) { pr_warn("No PStates found\n"); @@ -131,7 +136,12 @@ static unsigned int pstate_id_to_freq(int pstate_id) int i; i = powernv_pstate_info.max - pstate_id; - BUG_ON(i >= powernv_pstate_info.nr_pstates || i < 0); + if (i >= powernv_pstate_info.nr_pstates || i < 0) { + pr_warn("PState id %d outside of PState table, " + "reporting nominal id %d instead\n", + pstate_id, powernv_pstate_info.nominal); + i = powernv_pstate_info.max - powernv_pstate_info.nominal; + } return powernv_freqs[i].frequency; } @@ -321,6 +331,10 @@ static int __init powernv_cpufreq_init(void) { int rc = 0; + /* Don't probe on pseries (guest) platforms */ + if (!firmware_has_feature(FW_FEATURE_OPALv3)) + return -ENODEV; + /* Discover pstates from device tree and init */ rc = init_powernv_pstates(); if (rc) { |