microblaze: Unprivileged stream instruction awareness
Add cpuinfo support for the new MicroBlaze option permitting userspace
(unprivileged) access to the streaming instructions (FSL / AXI-stream).
Emit a noisy warning at bootup if this is enabled, because bad user code
can potentially lockup the CPU.
Signed-off-by: John A. Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/include/asm/pvr.h b/arch/microblaze/include/asm/pvr.h
index 56a80e45..4bbdb4c 100644
--- a/arch/microblaze/include/asm/pvr.h
+++ b/arch/microblaze/include/asm/pvr.h
@@ -117,10 +117,10 @@
#define PVR11_MMU_DTLB_SIZE 0x07000000
#define PVR11_MMU_TLB_ACCESS 0x00C00000
#define PVR11_MMU_ZONES 0x003C0000
+#define PVR11_MMU_PRIVINS 0x00010000
/* MSR Reset value PVR mask */
#define PVR11_MSR_RESET_VALUE_MASK 0x000007FF
-
/* PVR access macros */
#define PVR_IS_FULL(_pvr) (_pvr.pvr[0] & PVR0_PVR_FULL_MASK)
#define PVR_USE_BARREL(_pvr) (_pvr.pvr[0] & PVR0_USE_BARREL_MASK)
@@ -216,6 +216,7 @@
#define PVR_MMU_DTLB_SIZE(_pvr) (_pvr.pvr[11] & PVR11_MMU_DTLB_SIZE)
#define PVR_MMU_TLB_ACCESS(_pvr) (_pvr.pvr[11] & PVR11_MMU_TLB_ACCESS)
#define PVR_MMU_ZONES(_pvr) (_pvr.pvr[11] & PVR11_MMU_ZONES)
+#define PVR_MMU_PRIVINS(pvr) (pvr.pvr[11] & PVR11_MMU_PRIVINS)
/* endian */
#define PVR_ENDIAN(_pvr) (_pvr.pvr[0] & PVR0_ENDI)