path: root/tools/testing/selftests/powerpc/vphn/vphn.c
diff options
authorGreg Kurz <gkurz@linux.vnet.ibm.com>2015-02-23 16:14:37 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2015-03-18 10:48:59 +1100
commit3338a65badd5758c8723e2b1e5a0db88151f2774 (patch)
tree64d0f14de7a054c890dcd620b8b9281d2d183886 /tools/testing/selftests/powerpc/vphn/vphn.c
parentpowerpc/vphn: move VPHN parsing logic to a separate file (diff)
powerpc/vphn: parsing code rewrite
The current VPHN parsing logic has some flaws that this patch aims to fix: 1) when the value 0xffff is read, the value 0xffffffff gets added to the the output list and its element count isn't incremented. This is wrong. According to PAPR+ the domain identifiers are packed into a sequence terminated by the "reserved value of all ones". This means that 0xffff is a stream terminator. 2) the combination of byteswaps and casts make the code hardly readable. Let's parse the stream one 16-bit field at a time instead. 3) it is assumed that the hypercall returns 12 32-bit values packed into 6 64-bit registers. According to PAPR+, the domain identifiers may be streamed as 16-bit values. Let's increase the number of expected numbers to 24. Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions