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| author | Tiejun Chen <tiejun.chen@windriver.com> | 2015-10-06 22:48:22 -0500 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2015-10-27 18:13:30 -0500 |
| commit | 96eea6426f56042c28eff849cb2cc01895db081e (patch) | |
| tree | 3b1d336f74f0ae37a754948fa0dae8c45d3c2870 /arch/powerpc | |
| parent | ae73e4ccbc91853259d730fd8c5089bdf06a4fa3 (diff) | |
| download | linux-96eea6426f56042c28eff849cb2cc01895db081e.tar.gz linux-96eea6426f56042c28eff849cb2cc01895db081e.tar.bz2 linux-96eea6426f56042c28eff849cb2cc01895db081e.zip | |
powerpc/book3e-64: Enable kexec
Allow KEXEC for book3e, and bypass or convert non-book3e stuff
in kexec code.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
[scottwood@freescale.com: move code to minimize diff, and cleanup]
Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/machine_kexec_64.c | 18 | ||||
| -rw-r--r-- | arch/powerpc/kernel/misc_64.S | 6 |
3 files changed, 25 insertions, 1 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 9a7057ec2154..db49e0d796b1 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -419,7 +419,7 @@ config PPC64_SUPPORTS_MEMORY_FAILURE config KEXEC bool "kexec system call" - depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) + depends on (PPC_BOOK3S || FSL_BOOKE || (44x && !SMP)) || PPC_BOOK3E select KEXEC_CORE help kexec is a system call that implements the ability to shutdown your diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c index 1a74446fd9e5..0fbd75d185d7 100644 --- a/arch/powerpc/kernel/machine_kexec_64.c +++ b/arch/powerpc/kernel/machine_kexec_64.c @@ -30,6 +30,21 @@ #include <asm/smp.h> #include <asm/hw_breakpoint.h> +#ifdef CONFIG_PPC_BOOK3E +int default_machine_kexec_prepare(struct kimage *image) +{ + int i; + /* + * Since we use the kernel fault handlers and paging code to + * handle the virtual mode, we must make sure no destination + * overlaps kernel static data or bss. + */ + for (i = 0; i < image->nr_segments; i++) + if (image->segment[i].mem < __pa(_end)) + return -ETXTBSY; + return 0; +} +#else int default_machine_kexec_prepare(struct kimage *image) { int i; @@ -95,6 +110,7 @@ int default_machine_kexec_prepare(struct kimage *image) return 0; } +#endif /* !CONFIG_PPC_BOOK3E */ static void copy_segments(unsigned long ind) { @@ -365,6 +381,7 @@ void default_machine_kexec(struct kimage *image) /* NOTREACHED */ } +#ifndef CONFIG_PPC_BOOK3E /* Values we need to export to the second kernel via the device tree. */ static unsigned long htab_base; static unsigned long htab_size; @@ -411,3 +428,4 @@ static int __init export_htab_values(void) return 0; } late_initcall(export_htab_values); +#endif /* !CONFIG_PPC_BOOK3E */ diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index ddbc535a6d0f..db475d41b57a 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -631,9 +631,13 @@ _GLOBAL(kexec_sequence) lhz r25,PACAHWCPUID(r13) /* get our phys cpu from paca */ /* disable interrupts, we are overwriting kernel data next */ +#ifdef CONFIG_PPC_BOOK3E + wrteei 0 +#else mfmsr r3 rlwinm r3,r3,0,17,15 mtmsrd r3,1 +#endif /* copy dest pages, flush whole dest image */ mr r3,r29 @@ -655,6 +659,7 @@ _GLOBAL(kexec_sequence) li r6,1 stw r6,kexec_flag-1b(5) +#ifndef CONFIG_PPC_BOOK3E /* clear out hardware hash page table and tlb */ #if !defined(_CALL_ELF) || _CALL_ELF != 2 ld r12,0(r27) /* deref function descriptor */ @@ -663,6 +668,7 @@ _GLOBAL(kexec_sequence) #endif mtctr r12 bctrl /* ppc_md.hpte_clear_all(void); */ +#endif /* !CONFIG_PPC_BOOK3E */ /* * kexec image calling is: |