powerpc/pseries: Fix IBM_ARCH_VEC_NRCORES_OFFSET since POWER8NVL was added

commit 2c2a63e301fd19ccae673e79de59b30a232ff7f9 upstream.

The recent commit 7cc851039d64 ("powerpc/pseries: Add POWER8NVL support
to ibm,client-architecture-support call") added a new PVR mask & value
to the start of the ibm_architecture_vec[] array.

However it missed the fact that further down in the array, we hard code
the offset of one of the fields, and then at boot use that value to
patch the value in the array. This means every update to the array must
also update the #define, ugh.

This means that on pseries machines we will misreport to firmware the
number of cores we support, by a factor of threads_per_core.

Fix it for now by updating the #define.

Fixes: 7cc851039d64 ("powerpc/pseries: Add POWER8NVL support to ibm,client-architecture-support call")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index e52b82b71d798f408d72e3666a53202c4537b02b..b7e86e00048fafe86f3a6122fb3e8959c7ec187f 100644 (file)
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -718,7 +718,7 @@ unsigned char ibm_architecture_vec[] = {
         * must match by the macro below. Update the definition if
         * the structure layout changes.
         */
-#define IBM_ARCH_VEC_NRCORES_OFFSET    125
+#define IBM_ARCH_VEC_NRCORES_OFFSET    133
        W(NR_CPUS),                     /* number of cores supported */
        0,
        0,