@@ -1083,6 +1083,17 @@ __enter_rtas:
rtas_return_loc:
FIXUP_ENDIAN
+ /*
+ * Clear RI and set SF before anything.
+ */
+ mfmsr r6
+ li r0,MSR_RI
+ andc r6,r6,r0
+ sldi r0,r0,(MSR_SF_LG - MSR_RI_LG)
+ or r6,r6,r0
+ sync
+ mtmsrd r6
+
/* relocation is off at this point */
GET_PACA(r4)
clrldi r4,r4,2 /* convert to realmode address */
@@ -1091,12 +1102,6 @@ rtas_return_loc:
0: mflr r3
ld r3,(1f-0b)(r3) /* get &rtas_restore_regs */
- mfmsr r6
- li r0,MSR_RI
- andc r6,r6,r0
- sync
- mtmsrd r6
-
ld r1,PACAR1(r4) /* Restore our SP */
ld r4,PACASAVEDMSR(r4) /* Restore our MSR */
Commit 177ba7c647f3 ("powerpc/mm/radix: Limit paca allocation in radix") limited the paca allocation address to 1G on pSeries because RTAS return accesses the paca in 32-bit mode: On return from RTAS we access the paca variables and we have 64 bit disabled. This requires us to limit paca in 32 bit range. Fix this by setting ppc64_rma_size to first_memblock_size/1G range. Avoid this limit by switching to 64-bit mode before accessing any memory. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- arch/powerpc/kernel/entry_64.S | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)