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powerpc: Set DSCR bit in FSCR setup
authorMichael Neuling <mikey@neuling.org>
Mon, 4 Mar 2013 19:45:52 +0000 (19:45 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
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 <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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 bb2d203..ea847ab 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
 
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