From 382d2db62bcb34dff7febc270783d5ff662ced7a Mon Sep 17 00:00:00 2001 From: Greg Kurz Date: Mon, 19 May 2014 19:59:05 +0200 Subject: [PATCH] target-ppc: Introduce callback for interrupt endianness POWER7, POWER7+ and POWER8 families use the ILE bit of the LPCR special purpose register to decide the endianness to use when entering interrupt handlers. When running a Linux guest, this provides a hint on the endianness used by the kernel. And when it comes to dumping a guest, the information is needed to write ELF headers using the kernel endianness. Suggested-by: Benjamin Herrenschmidt Reviewed-by: Alexander Graf Signed-off-by: Greg Kurz [agraf: change subject line] Signed-off-by: Alexander Graf --- target-ppc/cpu-qom.h | 1 + target-ppc/translate_init.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/target-ppc/cpu-qom.h b/target-ppc/cpu-qom.h index d926d9369e..046ea0effa 100644 --- a/target-ppc/cpu-qom.h +++ b/target-ppc/cpu-qom.h @@ -76,6 +76,7 @@ typedef struct PowerPCCPUClass { int (*handle_mmu_fault)(PowerPCCPU *cpu, target_ulong eaddr, int rwx, int mmu_idx); #endif + bool (*interrupts_big_endian)(PowerPCCPU *cpu); } PowerPCCPUClass; /** diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c index 0f9dec753b..16ecada688 100644 --- a/target-ppc/translate_init.c +++ b/target-ppc/translate_init.c @@ -3111,6 +3111,18 @@ static int check_pow_hid0_74xx (CPUPPCState *env) return 0; } +static bool ppc_cpu_interrupts_big_endian_always(PowerPCCPU *cpu) +{ + return true; +} + +#ifdef TARGET_PPC64 +static bool ppc_cpu_interrupts_big_endian_lpcr(PowerPCCPU *cpu) +{ + return !(cpu->env.spr[SPR_LPCR] & LPCR_ILE); +} +#endif + /*****************************************************************************/ /* PowerPC implementations definitions */ @@ -7803,6 +7815,7 @@ POWERPC_FAMILY(POWER7)(ObjectClass *oc, void *data) POWERPC_FLAG_VSX; pcc->l1_dcache_size = 0x8000; pcc->l1_icache_size = 0x8000; + pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_lpcr; } POWERPC_FAMILY(POWER7P)(ObjectClass *oc, void *data) @@ -7861,6 +7874,7 @@ POWERPC_FAMILY(POWER7P)(ObjectClass *oc, void *data) POWERPC_FLAG_VSX; pcc->l1_dcache_size = 0x8000; pcc->l1_icache_size = 0x8000; + pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_lpcr; } static void init_proc_POWER8(CPUPPCState *env) @@ -7933,6 +7947,7 @@ POWERPC_FAMILY(POWER8)(ObjectClass *oc, void *data) POWERPC_FLAG_VSX; pcc->l1_dcache_size = 0x8000; pcc->l1_icache_size = 0x8000; + pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_lpcr; } #endif /* defined (TARGET_PPC64) */ @@ -9259,6 +9274,7 @@ static void ppc_cpu_class_init(ObjectClass *oc, void *data) pcc->parent_realize = dc->realize; pcc->pvr = CPU_POWERPC_DEFAULT_MASK; pcc->pvr_mask = CPU_POWERPC_DEFAULT_MASK; + pcc->interrupts_big_endian = ppc_cpu_interrupts_big_endian_always; dc->realize = ppc_cpu_realizefn; dc->unrealize = ppc_cpu_unrealizefn;