[PATCH] powerpc/book64s: Move a few exception common handlers to make room

Benjamin Herrenschmidt benh at kernel.crashing.org
Sun Jul 17 08:58:25 AEST 2016


This moves the CBE RAS and facility unavailable "common" handlers
down to after the FWNMI page.

This frees up some space in the very demanded spaces before the
relocation-on vectors and before the FWNMI page. They are still
within 64K of __start, so CONFIG_RELOCATABLE should still work.

Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---

Written in an airline lounge after about 30h spent in planes and
airports, so I apologize in advance if something is just plain
wrong here, but it seems to compile ;-)

 arch/powerpc/kernel/exceptions-64s.S | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 4c94406..92bab94 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -762,11 +762,6 @@ kvmppc_skip_Hinterrupt:
 #else
 	STD_EXCEPTION_COMMON(0x1700, altivec_assist, unknown_exception)
 #endif
-#ifdef CONFIG_CBE_RAS
-	STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception)
-	STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception)
-	STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception)
-#endif /* CONFIG_CBE_RAS */
 
 	/*
 	 * Relocation-on interrupts: A subset of the interrupts can be delivered
@@ -1131,9 +1126,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
 	bl	vsx_unavailable_exception
 	b	ret_from_except
 
-	STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception)
-	STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception)
-
 	/* Equivalents to the above handlers for relocation-on interrupt vectors */
 	STD_RELON_EXCEPTION_HV_OOL(0xe40, emulation_assist)
 	MASKABLE_RELON_EXCEPTION_HV_OOL(0xe80, h_doorbell)
@@ -1170,6 +1162,15 @@ fwnmi_data_area:
 	. = 0x8000
 #endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
 
+	STD_EXCEPTION_COMMON(0xf60, facility_unavailable, facility_unavailable_exception)
+	STD_EXCEPTION_COMMON(0xf80, hv_facility_unavailable, facility_unavailable_exception)
+
+#ifdef CONFIG_CBE_RAS
+	STD_EXCEPTION_COMMON(0x1200, cbe_system_error, cbe_system_error_exception)
+	STD_EXCEPTION_COMMON(0x1600, cbe_maintenance, cbe_maintenance_exception)
+	STD_EXCEPTION_COMMON(0x1800, cbe_thermal, cbe_thermal_exception)
+#endif /* CONFIG_CBE_RAS */
+
 	.globl hmi_exception_early
 hmi_exception_early:
 	EXCEPTION_PROLOG_1(PACA_EXGEN, NOTEST, 0xe60)




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