On Wed, Jan 16, 2019 at 07:55:29AM +0100, Christophe Leroy wrote: > Le 16/01/2019 à 01:35, Jonathan Neuschäfer a écrit : > > Thinning the kernel down a bit actually makes it boot again. Ooops...! > > Maybe enabling CONFIG_STRICT_KERNEL_RWX has made it just large enough to > > fail the hash table allocation, but there may have been other factors > > involved (I'm not sure exactly). Sorry for the confusion! > > Ok, that must be the reason. Thanks for testing. > > What about the following modification which maps a second 256Mb BAT, does it > helps ? > > > > diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S > index c2f564690778..ea574596de37 100644 > --- a/arch/powerpc/kernel/head_32.S > +++ b/arch/powerpc/kernel/head_32.S > @@ -1160,6 +1160,14 @@ initial_bats: > mtspr SPRN_DBAT0U,r11 /* bit in upper BAT register */ > mtspr SPRN_IBAT0L,r8 > mtspr SPRN_IBAT0U,r11 > +#ifdef CONFIG_WII > + addis r11,r11,0x10000000@h > + addis r8,r8,0x10000000@h > + mtspr SPRN_DBAT2L,r8 > + mtspr SPRN_DBAT2U,r11 > + mtspr SPRN_IBAT2L,r8 > + mtspr SPRN_IBAT2U,r11 > +#endif > isync > blr > > diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c > index 3f4193201ee7..a334fd5210a8 100644 > --- a/arch/powerpc/mm/ppc_mmu_32.c > +++ b/arch/powerpc/mm/ppc_mmu_32.c > @@ -259,6 +259,8 @@ void setup_initial_memory_limit(phys_addr_t > first_memblock_base, > /* 601 can only access 16MB at the moment */ > if (PVR_VER(mfspr(SPRN_PVR)) == 1) > memblock_set_current_limit(min_t(u64, first_memblock_size, > 0x01000000)); > + else if (IS_ENABLED(CONFIG_WII)) > + memblock_set_current_limit(min_t(u64, first_memblock_size, > 0x20000000)); > else /* Anything else has 256M mapped */ > memblock_set_current_limit(min_t(u64, first_memblock_size, > 0x10000000)); > }
I haven't tested it, but this patch won't be enough, because we're only looking at the first memblock, and the additional memory in the Wii (MEM2) is the second memblock. Jonathan
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