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powerpc: Make room in exception vector area

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The FWNMI region is fixed at 0x7000 and the vector are now
overflowing that with some configurations. Fix that by moving
some hash management code out of that region as it doesn't need
to be that close to the call sites (isn't accessed using
conditional branches).

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2013-01-10 17:44:19 +11:00
parent e13e895f84
commit 6138340767
1 changed files with 55 additions and 55 deletions
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110
arch/powerpc/kernel/exceptions-64s.S
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@ -1180,6 +1180,61 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
.globl __end_handlers
__end_handlers:
/* Equivalents to the above handlers for relocation-on interrupt vectors */
STD_RELON_EXCEPTION_HV(., 0xe00, h_data_storage)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe00)
STD_RELON_EXCEPTION_HV(., 0xe20, h_instr_storage)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe20)
STD_RELON_EXCEPTION_HV(., 0xe40, emulation_assist)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe40)
STD_RELON_EXCEPTION_HV(., 0xe60, hmi_exception)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe60)
MASKABLE_RELON_EXCEPTION_HV(., 0xe80, h_doorbell)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe80)
STD_RELON_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
STD_RELON_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
STD_RELON_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
/*
* Data area reserved for FWNMI option.
* This address (0x7000) is fixed by the RPA.
*/
.= 0x7000
.globl fwnmi_data_area
fwnmi_data_area:
/* pseries and powernv need to keep the whole page from
* 0x7000 to 0x8000 free for use by the firmware
*/
. = 0x8000
#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
/* Space for CPU0's segment table */
.balign 4096
.globl initial_stab
initial_stab:
.space 4096
#ifdef CONFIG_PPC_POWERNV
_GLOBAL(opal_mc_secondary_handler)
HMT_MEDIUM_PPR_DISCARD
SET_SCRATCH0(r13)
GET_PACA(r13)
clrldi r3,r3,2
tovirt(r3,r3)
std r3,PACA_OPAL_MC_EVT(r13)
ld r13,OPAL_MC_SRR0(r3)
mtspr SPRN_SRR0,r13
ld r13,OPAL_MC_SRR1(r3)
mtspr SPRN_SRR1,r13
ld r3,OPAL_MC_GPR3(r3)
GET_SCRATCH0(r13)
b machine_check_pSeries
#endif /* CONFIG_PPC_POWERNV */
/*
* Hash table stuff
*/
@ -1373,58 +1428,3 @@ _GLOBAL(do_stab_bolted)
ld r13,PACA_EXSLB+EX_R13(r13)
rfid
b . /* prevent speculative execution */
/* Equivalents to the above handlers for relocation-on interrupt vectors */
STD_RELON_EXCEPTION_HV(., 0xe00, h_data_storage)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe00)
STD_RELON_EXCEPTION_HV(., 0xe20, h_instr_storage)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe20)
STD_RELON_EXCEPTION_HV(., 0xe40, emulation_assist)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe40)
STD_RELON_EXCEPTION_HV(., 0xe60, hmi_exception)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe60)
MASKABLE_RELON_EXCEPTION_HV(., 0xe80, h_doorbell)
KVM_HANDLER(PACA_EXGEN, EXC_HV, 0xe80)
STD_RELON_EXCEPTION_PSERIES(., 0xf00, performance_monitor)
STD_RELON_EXCEPTION_PSERIES(., 0xf20, altivec_unavailable)
STD_RELON_EXCEPTION_PSERIES(., 0xf40, vsx_unavailable)
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
/*
* Data area reserved for FWNMI option.
* This address (0x7000) is fixed by the RPA.
*/
.= 0x7000
.globl fwnmi_data_area
fwnmi_data_area:
/* pseries and powernv need to keep the whole page from
* 0x7000 to 0x8000 free for use by the firmware
*/
. = 0x8000
#endif /* defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
/* Space for CPU0's segment table */
.balign 4096
.globl initial_stab
initial_stab:
.space 4096
#ifdef CONFIG_PPC_POWERNV
_GLOBAL(opal_mc_secondary_handler)
HMT_MEDIUM_PPR_DISCARD
SET_SCRATCH0(r13)
GET_PACA(r13)
clrldi r3,r3,2
tovirt(r3,r3)
std r3,PACA_OPAL_MC_EVT(r13)
ld r13,OPAL_MC_SRR0(r3)
mtspr SPRN_SRR0,r13
ld r13,OPAL_MC_SRR1(r3)
mtspr SPRN_SRR1,r13
ld r3,OPAL_MC_GPR3(r3)
GET_SCRATCH0(r13)
b machine_check_pSeries
#endif /* CONFIG_PPC_POWERNV */