[ARM] 3912/1: Make PXA270 advertise HWCAP_IWMMXT capability

ARM patch 3756/1 added HWCAP_IWMMXT.  This patch adds support
for broadcasting that info via /proc/cpuinfo and sets it for
the CPU features of the PXA270.

I've booted 19rc3 on a pxa270 and confirmed that the /proc/cpuinfo
shows "iwmmxt" in the Features.

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 5 insertions, 1 deletions

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 6bbd93dd186a..29efc9f82057 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -357,6 +357,9 @@ static void __init setup_processor(void)
 #ifndef CONFIG_VFP
         elf_hwcap &= ~HWCAP_VFP;
 #endif
+#ifndef CONFIG_IWMMXT
+        elf_hwcap &= ~HWCAP_IWMMXT;
+#endif
 
         cpu_proc_init();
 }
@@ -854,6 +857,7 @@ static const char *hwcap_str[] = {
         "vfp",
         "edsp",
         "java",
+        "iwmmxt",
         NULL
 };
 
diff --git a/arch/arm/mm/proc-xscale.S b/arch/arm/mm/proc-xscale.S
index e8b377d637f6..2749c1f88d7d 100644
--- a/arch/arm/mm/proc-xscale.S
+++ b/arch/arm/mm/proc-xscale.S
@@ -909,7 +909,7 @@ __pxa270_proc_info:
         b       __xscale_setup
         .long   cpu_arch_name
         .long   cpu_elf_name
-        .long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
+        .long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP|HWCAP_IWMMXT
         .long   cpu_pxa270_name
         .long   xscale_processor_functions
         .long   v4wbi_tlb_fns