ARM: software-based priviledged-no-access support

[linux-2.6-block.git] / arch / arm / lib / csumpartialcopyuser.S

diff --git a/arch/arm/lib/csumpartialcopyuser.S b/arch/arm/lib/csumpartialcopyuser.S
index 1d0957e61f898ab6ab43759496e85c8b247218d1..1712f132b80d2402d94d72ea974a0c3326fa2f52 100644 (file)
--- a/arch/arm/lib/csumpartialcopyuser.S
+++ b/arch/arm/lib/csumpartialcopyuser.S
@@ -17,6 +17,19 @@
 
                .text
 
+#ifdef CONFIG_CPU_SW_DOMAIN_PAN
+               .macro  save_regs
+               mrc     p15, 0, ip, c3, c0, 0
+               stmfd   sp!, {r1, r2, r4 - r8, ip, lr}
+               uaccess_enable ip
+               .endm
+
+               .macro  load_regs
+               ldmfd   sp!, {r1, r2, r4 - r8, ip, lr}
+               mcr     p15, 0, ip, c3, c0, 0
+               ret     lr
+               .endm
+#else
                .macro  save_regs
                stmfd   sp!, {r1, r2, r4 - r8, lr}
                .endm
@@ -24,6 +37,7 @@
                .macro  load_regs
                ldmfd   sp!, {r1, r2, r4 - r8, pc}
                .endm
+#endif
 
                .macro  load1b, reg1
                ldrusr  \reg1, r0, 1