s390/kdump: fix REGSET_VX_LOW vector register ELF notes

commit 3c8e5105e759e7b2d88ea8a85b1285e535bc7500 upstream.

The REGSET_VX_LOW ELF notes should contain the lower 64 bit halfes of the
first sixteen 128 bit vector registers. Unfortunately currently we copy
the upper halfes.

Fix this and correctly copy the lower halfes.

Fixes: a62bc0739253 ("s390/kdump: add support for vector extension")
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 9f73c805902291c1619335cb38c4fe0f8492b29a..49b74454d7ee6fde79041c3a87fc78a402a5d610 100644 (file)
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -415,7 +415,7 @@ static void *nt_s390_vx_low(void *ptr, __vector128 *vx_regs)
        ptr += len;
        /* Copy lower halves of SIMD registers 0-15 */
        for (i = 0; i < 16; i++) {
-               memcpy(ptr, &vx_regs[i], 8);
+               memcpy(ptr, &vx_regs[i].u[2], 8);
                ptr += 8;
        }
        return ptr;