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powerpc: Set DSCR bit in FSCR setup
authorMichael Neuling <[email protected]>
Mon, 4 Mar 2013 19:45:52 +0000 (19:45 +0000)
committerBenjamin Herrenschmidt <[email protected]>
Tue, 5 Mar 2013 05:56:30 +0000 (16:56 +1100)
We support DSCR (Data Stream Control Register) so we should make sure we set it
in the FSCR (Facility Status & Control Register) incase some firmwares don't
set it.  If we don't set this, we'll take a facility unavailable exception when
using the DSCR.

Signed-off-by: Michael Neuling <[email protected]>
Signed-off-by: Benjamin Herrenschmidt <[email protected]>
arch/powerpc/kernel/cpu_setup_power.S patch | blob | history

diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S
index bb2d2034d61f0903d52faa84e016f5ac404e5739..ea847abb0d0a5fae6738c1bed0dc863d78358ded 100644 (file)
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -116,7 +116,7 @@ __init_LPCR:
 
 __init_FSCR:
        mfspr   r3,SPRN_FSCR
-       ori     r3,r3,FSCR_TAR
+       ori     r3,r3,FSCR_TAR|FSCR_DSCR
        mtspr   SPRN_FSCR,r3
        blr
 
John Crispins staging tree