Just a couple of build fixes for powerpc all{mod,yes}config.
Submitted by me since BenH is on vacation.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes
Pull powerpc build fixes from Stephen Rothwell:
"Just a couple of build fixes for powerpc all{mod,yes}config.
Submitted by me since BenH is on vacation."
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes:
powerpc: define the conditions where the ePAPR idle hcall can be supported
powerpc: make additional room in exception vector area
This commit is contained in:
Linus Torvalds
commit
9064171268
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@ -23,8 +23,10 @@
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#include <asm/code-patching.h>
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#include <asm/machdep.h>
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#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
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extern void epapr_ev_idle(void);
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extern u32 epapr_ev_idle_start[];
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#endif
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bool epapr_paravirt_enabled;
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@ -47,11 +49,15 @@ static int __init epapr_paravirt_init(void)
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for (i = 0; i < (len / 4); i++) {
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patch_instruction(epapr_hypercall_start + i, insts[i]);
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#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
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patch_instruction(epapr_ev_idle_start + i, insts[i]);
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#endif
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}
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#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
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if (of_get_property(hyper_node, "has-idle", NULL))
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ppc_md.power_save = epapr_ev_idle;
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#endif
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epapr_paravirt_enabled = true;
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@ -1066,78 +1066,6 @@ unrecov_user_slb:
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#endif /* __DISABLED__ */
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/*
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* r13 points to the PACA, r9 contains the saved CR,
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* r12 contain the saved SRR1, SRR0 is still ready for return
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* r3 has the faulting address
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* r9 - r13 are saved in paca->exslb.
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* r3 is saved in paca->slb_r3
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* We assume we aren't going to take any exceptions during this procedure.
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*/
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_GLOBAL(slb_miss_realmode)
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mflr r10
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#ifdef CONFIG_RELOCATABLE
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mtctr r11
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#endif
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stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
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std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
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bl .slb_allocate_realmode
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/* All done -- return from exception. */
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ld r10,PACA_EXSLB+EX_LR(r13)
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ld r3,PACA_EXSLB+EX_R3(r13)
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lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
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mtlr r10
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andi. r10,r12,MSR_RI /* check for unrecoverable exception */
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beq- 2f
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.machine push
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.machine "power4"
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mtcrf 0x80,r9
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mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
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.machine pop
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RESTORE_PPR_PACA(PACA_EXSLB, r9)
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ld r9,PACA_EXSLB+EX_R9(r13)
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ld r10,PACA_EXSLB+EX_R10(r13)
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ld r11,PACA_EXSLB+EX_R11(r13)
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ld r12,PACA_EXSLB+EX_R12(r13)
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ld r13,PACA_EXSLB+EX_R13(r13)
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rfid
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b . /* prevent speculative execution */
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2: mfspr r11,SPRN_SRR0
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ld r10,PACAKBASE(r13)
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LOAD_HANDLER(r10,unrecov_slb)
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mtspr SPRN_SRR0,r10
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ld r10,PACAKMSR(r13)
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mtspr SPRN_SRR1,r10
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rfid
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b .
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unrecov_slb:
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EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
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DISABLE_INTS
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bl .save_nvgprs
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1: addi r3,r1,STACK_FRAME_OVERHEAD
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bl .unrecoverable_exception
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b 1b
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#ifdef CONFIG_PPC_970_NAP
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power4_fixup_nap:
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andc r9,r9,r10
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std r9,TI_LOCAL_FLAGS(r11)
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ld r10,_LINK(r1) /* make idle task do the */
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std r10,_NIP(r1) /* equivalent of a blr */
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blr
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#endif
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.align 7
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.globl alignment_common
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alignment_common:
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@ -1335,6 +1263,78 @@ _GLOBAL(opal_mc_secondary_handler)
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#endif /* CONFIG_PPC_POWERNV */
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/*
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* r13 points to the PACA, r9 contains the saved CR,
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* r12 contain the saved SRR1, SRR0 is still ready for return
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* r3 has the faulting address
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* r9 - r13 are saved in paca->exslb.
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* r3 is saved in paca->slb_r3
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* We assume we aren't going to take any exceptions during this procedure.
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*/
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_GLOBAL(slb_miss_realmode)
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mflr r10
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#ifdef CONFIG_RELOCATABLE
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mtctr r11
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#endif
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stw r9,PACA_EXSLB+EX_CCR(r13) /* save CR in exc. frame */
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std r10,PACA_EXSLB+EX_LR(r13) /* save LR */
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bl .slb_allocate_realmode
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/* All done -- return from exception. */
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ld r10,PACA_EXSLB+EX_LR(r13)
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ld r3,PACA_EXSLB+EX_R3(r13)
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lwz r9,PACA_EXSLB+EX_CCR(r13) /* get saved CR */
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mtlr r10
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andi. r10,r12,MSR_RI /* check for unrecoverable exception */
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beq- 2f
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.machine push
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.machine "power4"
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mtcrf 0x80,r9
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mtcrf 0x01,r9 /* slb_allocate uses cr0 and cr7 */
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.machine pop
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RESTORE_PPR_PACA(PACA_EXSLB, r9)
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ld r9,PACA_EXSLB+EX_R9(r13)
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ld r10,PACA_EXSLB+EX_R10(r13)
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ld r11,PACA_EXSLB+EX_R11(r13)
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ld r12,PACA_EXSLB+EX_R12(r13)
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ld r13,PACA_EXSLB+EX_R13(r13)
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rfid
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b . /* prevent speculative execution */
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2: mfspr r11,SPRN_SRR0
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ld r10,PACAKBASE(r13)
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LOAD_HANDLER(r10,unrecov_slb)
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mtspr SPRN_SRR0,r10
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ld r10,PACAKMSR(r13)
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mtspr SPRN_SRR1,r10
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rfid
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b .
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unrecov_slb:
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EXCEPTION_PROLOG_COMMON(0x4100, PACA_EXSLB)
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DISABLE_INTS
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bl .save_nvgprs
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1: addi r3,r1,STACK_FRAME_OVERHEAD
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bl .unrecoverable_exception
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b 1b
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#ifdef CONFIG_PPC_970_NAP
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power4_fixup_nap:
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andc r9,r9,r10
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std r9,TI_LOCAL_FLAGS(r11)
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ld r10,_LINK(r1) /* make idle task do the */
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std r10,_NIP(r1) /* equivalent of a blr */
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blr
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#endif
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/*
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* Hash table stuff
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*/
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