[Xen-changelog] [xen stable-4.10] xen/arm: smccc-1.1: Make return values unsigned long

[patchbot@xxxxxxx]

commit cbe5b1910b3e62311fc4c4db2600fb79be90074c
Author:     Marc Zyngier <marc.zyngier@xxxxxxx>
AuthorDate: Tue Sep 25 18:20:38 2018 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Fri Jan 25 17:21:48 2019 -0800

    xen/arm: smccc-1.1: Make return values unsigned long
    
    An unfortunate consequence of having a strong typing for the input
    values to the SMC call is that it also affects the type of the
    return values, limiting r0 to 32 bits and r{1,2,3} to whatever
    was passed as an input.
    
    Let's turn everything into "unsigned long", which satisfies the
    requirements of both architectures, and allows for the full
    range of return values.
    
    Reported-by: Stefano Stabellini <stefanos@xxxxxxxxxx>
    Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    (cherry picked from commit 35fc6086124ffe27d297801616e7ac6dc344040b)
    (cherry picked from commit ad8875c8a7b55f4e7b5641ca4a7312b78bcf4c91)
---
 xen/include/asm-arm/smccc.h | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/xen/include/asm-arm/smccc.h b/xen/include/asm-arm/smccc.h
index 8342cc33fe..3dc4f003a1 100644
--- a/xen/include/asm-arm/smccc.h
+++ b/xen/include/asm-arm/smccc.h
@@ -119,35 +119,35 @@ struct arm_smccc_res {
 
 #define __declare_arg_0(a0, res)                        \
     struct arm_smccc_res    *___res = res;              \
-    register uin32_t        r0 asm("r0") = a0;          \
+    register unsigned long  r0 asm("r0") = (uint32_t)a0;\
     register unsigned long  r1 asm("r1");               \
     register unsigned long  r2 asm("r2");               \
     register unsigned long  r3 asm("r3")
 
 #define __declare_arg_1(a0, a1, res)                    \
     struct arm_smccc_res    *___res = res;              \
-    register uint32_t       r0 asm("r0") = a0;          \
-    register typeof(a1)     r1 asm("r1") = a1;          \
+    register unsigned long  r0 asm("r0") = (uint32_t)a0;\
+    register unsigned long  r1 asm("r1") = a1;          \
     register unsigned long  r2 asm("r2");               \
     register unsigned long  r3 asm("r3")
 
 #define __declare_arg_2(a0, a1, a2, res)                \
     struct arm_smccc_res    *___res = res;                             \
-    register u32            r0 asm("r0") = a0;          \
-    register typeof(a1)     r1 asm("r1") = a1;          \
-    register typeof(a2)     r2 asm("r2") = a2;          \
+    register unsigned long  r0 asm("r0") = (uint32_t)a0;\
+    register unsigned long  r1 asm("r1") = a1;          \
+    register unsigned long  r2 asm("r2") = a2;          \
     register unsigned long  r3 asm("r3")
 
 #define __declare_arg_3(a0, a1, a2, a3, res)            \
     struct arm_smccc_res    *___res = res;              \
-    register u32            r0 asm("r0") = a0;          \
-    register typeof(a1)     r1 asm("r1") = a1;          \
-    register typeof(a2)     r2 asm("r2") = a2;          \
-    register typeof(a3)     r3 asm("r3") = a3
+    register unsigned long  r0 asm("r0") = (uint32_t)a0;\
+    register unsigned long  r1 asm("r1") = a1;          \
+    register unsigned long  r2 asm("r2") = a2;          \
+    register unsigned long  r3 asm("r3") = a3
 
 #define __declare_arg_4(a0, a1, a2, a3, a4, res)        \
     __declare_arg_3(a0, a1, a2, a3, res);               \
-    register typeof(a4) r4 asm("r4") = a4
+    register unsigned long r4 asm("r4") = a4
 
 #define __declare_arg_5(a0, a1, a2, a3, a4, a5, res)    \
     __declare_arg_4(a0, a1, a2, a3, a4, res);           \
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.10

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