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kexec: split kexec_load syscall from kexec core code

Selaa lähdekoodia 
There are two kexec load syscalls, kexec_load another and kexec_file_load.
 kexec_file_load has been splited as kernel/kexec_file.c.  In this patch I
split kexec_load syscall code to kernel/kexec.c.

And add a new kconfig option KEXEC_CORE, so we can disable kexec_load and
use kexec_file_load only, or vice verse.

The original requirement is from Ted Ts'o, he want kexec kernel signature
being checked with CONFIG_KEXEC_VERIFY_SIG enabled.  But kexec-tools use
kexec_load syscall can bypass the checking.

Vivek Goyal proposed to create a common kconfig option so user can compile
in only one syscall for loading kexec kernel.  KEXEC/KEXEC_FILE selects
KEXEC_CORE so that old config files still work.

Because there's general code need CONFIG_KEXEC_CORE, so I updated all the
architecture Kconfig with a new option KEXEC_CORE, and let KEXEC selects
KEXEC_CORE in arch Kconfig.  Also updated general kernel code with to
kexec_load syscall.

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Dave Young <dyoung@redhat.com>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Petr Tesarik <ptesarik@suse.cz>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dave Young
2015-09-09 15:38:55 -07:00
committed by Linus Torvalds
vanhempi a43cac0d9d
commit 2965faa5e0
32 muutettua tiedostoa jossa 1560 lisäystä ja 1527 poistoa
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4
arch/x86/platform/efi/efi.c
Näytä tiedosto

@@ -650,7 +650,7 @@ static void __init get_systab_virt_addr(efi_memory_desc_t *md)
static void __init save_runtime_map(void)
{
#ifdef CONFIG_KEXEC
#ifdef CONFIG_KEXEC_CORE
efi_memory_desc_t *md;
void *tmp, *p, *q = NULL;
int count = 0;
@@ -748,7 +748,7 @@ static void * __init efi_map_regions(int *count, int *pg_shift)
static void __init kexec_enter_virtual_mode(void)
{
#ifdef CONFIG_KEXEC
#ifdef CONFIG_KEXEC_CORE
efi_memory_desc_t *md;
void *p;

6
arch/x86/platform/uv/uv_nmi.c
Näytä tiedosto

@@ -492,7 +492,7 @@ static void uv_nmi_touch_watchdogs(void)
touch_nmi_watchdog();
}
#if defined(CONFIG_KEXEC)
#if defined(CONFIG_KEXEC_CORE)
static atomic_t uv_nmi_kexec_failed;
static void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs)
{
@@ -519,13 +519,13 @@ static void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs)
uv_nmi_sync_exit(0);
}
#else /* !CONFIG_KEXEC */
#else /* !CONFIG_KEXEC_CORE */
static inline void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs)
{
if (master)
pr_err("UV: NMI kdump: KEXEC not supported in this kernel\n");
}
#endif /* !CONFIG_KEXEC */
#endif /* !CONFIG_KEXEC_CORE */
#ifdef CONFIG_KGDB
#ifdef CONFIG_KGDB_KDB