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x86, nx: Mark the ACPI resume trampoline code as +x

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We reserve lowmem for the things that need it, like the ACPI
wakeup code, way early to guarantee availability.  This happens
before we set up the proper pagetables, so set_memory_x() has no
effect.

Until we have a better solution, use an initcall to mark the
wakeup code executable.

Originally-by: Matthieu Castet <castet.matthieu@free.fr>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Matthias Hopf <mhopf@suse.de>
Cc: rjw@sisk.pl
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <4D4F8019.2090104@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
H. Peter Anvin 2011-02-06 21:16:09 -08:00 committed by Ingo Molnar
parent 8dbdea8444
commit d344e38b2c
1 changed files with 10 additions and 3 deletions
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13
arch/x86/kernel/acpi/sleep.c
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@ -12,10 +12,8 @@
#include <linux/cpumask.h>
#include <asm/segment.h>
#include <asm/desc.h>
#ifdef CONFIG_X86_32
#include <asm/pgtable.h>
#endif
#include <asm/cacheflush.h>
#include "realmode/wakeup.h"
#include "sleep.h"
@ -149,6 +147,15 @@ void __init acpi_reserve_wakeup_memory(void)
memblock_x86_reserve_range(mem, mem + WAKEUP_SIZE, "ACPI WAKEUP");
}
int __init acpi_configure_wakeup_memory(void)
{
if (acpi_realmode)
set_memory_x(acpi_realmode, WAKEUP_SIZE >> PAGE_SHIFT);
return 0;
}
arch_initcall(acpi_configure_wakeup_memory);
static int __init acpi_sleep_setup(char *str)
{