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authorMichael Ellerman <michael@ellerman.id.au>2008-08-06 09:10:01 +1000
committerPaul Mackerras <paulus@samba.org>2008-08-20 16:34:57 +1000
commit7e302869e0c5261aba779e059cddcd2fbf7aedbe (patch)
tree5e0fa618fd830819ca2b6d5fdabf1c297963702b /arch/powerpc/Kconfig.debug
parent611cd90c91494d1ff9bd4bc349fe38789828733e (diff)
downloadlinaro-lsk-7e302869e0c5261aba779e059cddcd2fbf7aedbe.tar.gz
powerpc: Split-out common MSI bitmap logic into msi_bitmap.c
There are now two almost identical implementations of an MSI bitmap allocator, one in mpic_msi.c and the other in fsl_msi.c. Merge them together and put the result in msi_bitmap.c. Some of the MPIC bits will remain to provide a nicer interface for the MPIC users. In the process we fix two buglets. The first is that the allocation routines, now msi_bitmap_alloc_hwirqs(), returned an unsigned result, even though they use -1 to indicate allocation failure. Although all the callers were checking correctly, it is much better for the routine to just return an int. At least until someone wants > ~2 billion MSIs. The second buglet is that the device tree reservation logic only allowed power-of-two reservations. AFAICT that didn't effect any existing code but it's nicer if we can reserve arbitrary irqs from MSI use. We also add some selftests, which exposed the two buglets and now test for them, as well as some basic sanity tests. The tests are only built when CONFIG_DEBUG_KERNEL=y. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
-rw-r--r--arch/powerpc/Kconfig.debug5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 4ebc52a19f0..15eb27861fc 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -51,6 +51,11 @@ config FTR_FIXUP_SELFTEST
depends on DEBUG_KERNEL
default n
+config MSI_BITMAP_SELFTEST
+ bool "Run self-tests of the MSI bitmap code."
+ depends on DEBUG_KERNEL
+ default n
+
config XMON
bool "Include xmon kernel debugger"
depends on DEBUG_KERNEL