diff options
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/boot/Makefile | 3 | ||||
-rw-r--r-- | arch/powerpc/boot/main.c | 8 | ||||
-rw-r--r-- | arch/powerpc/boot/opal-calls.S | 13 | ||||
-rw-r--r-- | arch/powerpc/boot/opal.c | 13 | ||||
-rw-r--r-- | arch/powerpc/boot/ops.h | 1 | ||||
-rw-r--r-- | arch/powerpc/include/asm/asm-prototypes.h | 12 | ||||
-rw-r--r-- | arch/powerpc/include/asm/mmu.h | 14 | ||||
-rw-r--r-- | arch/powerpc/include/asm/reg.h | 1 | ||||
-rw-r--r-- | arch/powerpc/kernel/cpu_setup_power.S | 8 | ||||
-rw-r--r-- | arch/powerpc/kernel/eeh_driver.c | 4 | ||||
-rw-r--r-- | arch/powerpc/kernel/vmlinux.lds.S | 9 | ||||
-rw-r--r-- | arch/powerpc/mm/hash64_4k.c | 2 | ||||
-rw-r--r-- | arch/powerpc/mm/hash64_64k.c | 4 | ||||
-rw-r--r-- | arch/powerpc/mm/hash_utils_64.c | 8 |
14 files changed, 82 insertions, 18 deletions
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile index eae2dc8..9d47f2e 100644 --- a/arch/powerpc/boot/Makefile +++ b/arch/powerpc/boot/Makefile @@ -100,7 +100,8 @@ src-wlib-y := string.S crt0.S crtsavres.S stdio.c decompress.c main.c \ ns16550.c serial.c simple_alloc.c div64.S util.S \ elf_util.c $(zlib-y) devtree.c stdlib.c \ oflib.c ofconsole.c cuboot.c mpsc.c cpm-serial.c \ - uartlite.c mpc52xx-psc.c opal.c opal-calls.S + uartlite.c mpc52xx-psc.c opal.c +src-wlib-$(CONFIG_PPC64_BOOT_WRAPPER) += opal-calls.S src-wlib-$(CONFIG_40x) += 4xx.c planetcore.c src-wlib-$(CONFIG_44x) += 4xx.c ebony.c bamboo.c src-wlib-$(CONFIG_8xx) += mpc8xx.c planetcore.c fsl-soc.c diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c index 57d42d1..78aaf4f 100644 --- a/arch/powerpc/boot/main.c +++ b/arch/powerpc/boot/main.c @@ -232,8 +232,12 @@ void start(void) console_ops.close(); kentry = (kernel_entry_t) vmlinux.addr; - if (ft_addr) - kentry(ft_addr, 0, NULL); + if (ft_addr) { + if(platform_ops.kentry) + platform_ops.kentry(ft_addr, vmlinux.addr); + else + kentry(ft_addr, 0, NULL); + } else kentry((unsigned long)initrd.addr, initrd.size, loader_info.promptr); diff --git a/arch/powerpc/boot/opal-calls.S b/arch/powerpc/boot/opal-calls.S index ff2f1b9..2a99fc9 100644 --- a/arch/powerpc/boot/opal-calls.S +++ b/arch/powerpc/boot/opal-calls.S @@ -12,6 +12,19 @@ .text + .globl opal_kentry +opal_kentry: + /* r3 is the fdt ptr */ + mtctr r4 + li r4, 0 + li r5, 0 + li r6, 0 + li r7, 0 + ld r11,opal@got(r2) + ld r8,0(r11) + ld r9,8(r11) + bctr + #define OPAL_CALL(name, token) \ .globl name; \ name: \ diff --git a/arch/powerpc/boot/opal.c b/arch/powerpc/boot/opal.c index 1f37e1c..0272570 100644 --- a/arch/powerpc/boot/opal.c +++ b/arch/powerpc/boot/opal.c @@ -13,7 +13,7 @@ #include <libfdt.h> #include "../include/asm/opal-api.h" -#ifdef __powerpc64__ +#ifdef CONFIG_PPC64_BOOT_WRAPPER /* Global OPAL struct used by opal-call.S */ struct opal { @@ -23,14 +23,25 @@ struct opal { static u32 opal_con_id; +/* see opal-wrappers.S */ int64_t opal_console_write(int64_t term_number, u64 *length, const u8 *buffer); int64_t opal_console_read(int64_t term_number, uint64_t *length, u8 *buffer); int64_t opal_console_write_buffer_space(uint64_t term_number, uint64_t *length); int64_t opal_console_flush(uint64_t term_number); int64_t opal_poll_events(uint64_t *outstanding_event_mask); +void opal_kentry(unsigned long fdt_addr, void *vmlinux_addr); + static int opal_con_open(void) { + /* + * When OPAL loads the boot kernel it stashes the OPAL base and entry + * address in r8 and r9 so the kernel can use the OPAL console + * before unflattening the devicetree. While executing the wrapper will + * probably trash r8 and r9 so this kentry hook restores them before + * entering the decompressed kernel. + */ + platform_ops.kentry = opal_kentry; return 0; } diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h index 309d1b1..fad1862 100644 --- a/arch/powerpc/boot/ops.h +++ b/arch/powerpc/boot/ops.h @@ -30,6 +30,7 @@ struct platform_ops { void * (*realloc)(void *ptr, unsigned long size); void (*exit)(void); void * (*vmlinux_alloc)(unsigned long size); + void (*kentry)(unsigned long fdt_addr, void *vmlinux_addr); }; extern struct platform_ops platform_ops; diff --git a/arch/powerpc/include/asm/asm-prototypes.h b/arch/powerpc/include/asm/asm-prototypes.h index d149273..e0baba1 100644 --- a/arch/powerpc/include/asm/asm-prototypes.h +++ b/arch/powerpc/include/asm/asm-prototypes.h @@ -14,6 +14,10 @@ #include <linux/threads.h> #include <linux/kprobes.h> +#include <asm/cacheflush.h> +#include <asm/checksum.h> +#include <asm/uaccess.h> +#include <asm/epapr_hcalls.h> #include <uapi/asm/ucontext.h> @@ -109,4 +113,12 @@ void early_setup_secondary(void); /* time */ void accumulate_stolen_time(void); +/* misc runtime */ +extern u64 __bswapdi2(u64); +extern s64 __lshrdi3(s64, int); +extern s64 __ashldi3(s64, int); +extern s64 __ashrdi3(s64, int); +extern int __cmpdi2(s64, s64); +extern int __ucmpdi2(u64, u64); + #endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */ diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index e883683..e311c25 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -29,6 +29,12 @@ */ /* + * Kernel read only support. + * We added the ppp value 0b110 in ISA 2.04. + */ +#define MMU_FTR_KERNEL_RO ASM_CONST(0x00004000) + +/* * We need to clear top 16bits of va (from the remaining 64 bits )in * tlbie* instructions */ @@ -103,10 +109,10 @@ #define MMU_FTRS_POWER4 MMU_FTRS_DEFAULT_HPTE_ARCH_V2 #define MMU_FTRS_PPC970 MMU_FTRS_POWER4 | MMU_FTR_TLBIE_CROP_VA #define MMU_FTRS_POWER5 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE -#define MMU_FTRS_POWER6 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE -#define MMU_FTRS_POWER7 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE -#define MMU_FTRS_POWER8 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE -#define MMU_FTRS_POWER9 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE +#define MMU_FTRS_POWER6 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_KERNEL_RO +#define MMU_FTRS_POWER7 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_KERNEL_RO +#define MMU_FTRS_POWER8 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_KERNEL_RO +#define MMU_FTRS_POWER9 MMU_FTRS_POWER4 | MMU_FTR_LOCKLESS_TLBIE | MMU_FTR_KERNEL_RO #define MMU_FTRS_CELL MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \ MMU_FTR_CI_LARGE_PAGE #define MMU_FTRS_PA6T MMU_FTRS_DEFAULT_HPTE_ARCH_V2 | \ diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h index 9cd4e8c..9e1499f 100644 --- a/arch/powerpc/include/asm/reg.h +++ b/arch/powerpc/include/asm/reg.h @@ -355,6 +355,7 @@ #define LPCR_PECE0 ASM_CONST(0x0000000000004000) /* ext. exceptions can cause exit */ #define LPCR_PECE1 ASM_CONST(0x0000000000002000) /* decrementer can cause exit */ #define LPCR_PECE2 ASM_CONST(0x0000000000001000) /* machine check etc can cause exit */ +#define LPCR_PECE_HVEE ASM_CONST(0x0000400000000000) /* P9 Wakeup on HV interrupts */ #define LPCR_MER ASM_CONST(0x0000000000000800) /* Mediated External Exception */ #define LPCR_MER_SH 11 #define LPCR_TC ASM_CONST(0x0000000000000200) /* Translation control */ diff --git a/arch/powerpc/kernel/cpu_setup_power.S b/arch/powerpc/kernel/cpu_setup_power.S index 52ff3f0..37c027c 100644 --- a/arch/powerpc/kernel/cpu_setup_power.S +++ b/arch/powerpc/kernel/cpu_setup_power.S @@ -98,8 +98,8 @@ _GLOBAL(__setup_cpu_power9) li r0,0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR - ori r3, r3, LPCR_PECEDH - ori r3, r3, LPCR_HVICE + LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE) + or r3, r3, r4 bl __init_LPCR bl __init_HFSCR bl __init_tlb_power9 @@ -118,8 +118,8 @@ _GLOBAL(__restore_cpu_power9) li r0,0 mtspr SPRN_LPID,r0 mfspr r3,SPRN_LPCR - ori r3, r3, LPCR_PECEDH - ori r3, r3, LPCR_HVICE + LOAD_REG_IMMEDIATE(r4, LPCR_PECEDH | LPCR_PECE_HVEE | LPCR_HVICE) + or r3, r3, r4 bl __init_LPCR bl __init_HFSCR bl __init_tlb_power9 diff --git a/arch/powerpc/kernel/eeh_driver.c b/arch/powerpc/kernel/eeh_driver.c index a62be72..5c31369 100644 --- a/arch/powerpc/kernel/eeh_driver.c +++ b/arch/powerpc/kernel/eeh_driver.c @@ -671,8 +671,10 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus, /* Clear frozen state */ rc = eeh_clear_pe_frozen_state(pe, false); - if (rc) + if (rc) { + pci_unlock_rescan_remove(); return rc; + } /* Give the system 5 seconds to finish running the user-space * hotplug shutdown scripts, e.g. ifdown for ethernet. Yes, diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S index 8295f51..7394b77 100644 --- a/arch/powerpc/kernel/vmlinux.lds.S +++ b/arch/powerpc/kernel/vmlinux.lds.S @@ -94,8 +94,17 @@ SECTIONS * detected, and will result in a crash at boot due to offsets being * wrong. */ +#ifdef CONFIG_PPC64 + /* + * BLOCK(0) overrides the default output section alignment because + * this needs to start right after .head.text in order for fixed + * section placement to work. + */ + .text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) { +#else .text : AT(ADDR(.text) - LOAD_OFFSET) { ALIGN_FUNCTION(); +#endif /* careful! __ftr_alt_* sections need to be close to .text */ *(.text .fixup __ftr_alt_* .ref.text) SCHED_TEXT diff --git a/arch/powerpc/mm/hash64_4k.c b/arch/powerpc/mm/hash64_4k.c index 42c702b..6fa450c 100644 --- a/arch/powerpc/mm/hash64_4k.c +++ b/arch/powerpc/mm/hash64_4k.c @@ -55,7 +55,7 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid, */ rflags = htab_convert_pte_flags(new_pte); - if (!cpu_has_feature(CPU_FTR_NOEXECUTE) && + if (cpu_has_feature(CPU_FTR_NOEXECUTE) && !cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap); diff --git a/arch/powerpc/mm/hash64_64k.c b/arch/powerpc/mm/hash64_64k.c index 3bbbea0..1a68cb1 100644 --- a/arch/powerpc/mm/hash64_64k.c +++ b/arch/powerpc/mm/hash64_64k.c @@ -87,7 +87,7 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid, subpg_pte = new_pte & ~subpg_prot; rflags = htab_convert_pte_flags(subpg_pte); - if (!cpu_has_feature(CPU_FTR_NOEXECUTE) && + if (cpu_has_feature(CPU_FTR_NOEXECUTE) && !cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) { /* @@ -258,7 +258,7 @@ int __hash_page_64K(unsigned long ea, unsigned long access, rflags = htab_convert_pte_flags(new_pte); - if (!cpu_has_feature(CPU_FTR_NOEXECUTE) && + if (cpu_has_feature(CPU_FTR_NOEXECUTE) && !cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap); diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 5503078..78dabf06 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -193,8 +193,12 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags) /* * Kernel read only mapped with ppp bits 0b110 */ - if (!(pteflags & _PAGE_WRITE)) - rflags |= (HPTE_R_PP0 | 0x2); + if (!(pteflags & _PAGE_WRITE)) { + if (mmu_has_feature(MMU_FTR_KERNEL_RO)) + rflags |= (HPTE_R_PP0 | 0x2); + else + rflags |= 0x3; + } } else { if (pteflags & _PAGE_RWX) rflags |= 0x2; |