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x86: uv: Add UV memory protection bios call

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Add UV bios call to change memory protections.

Signed-off-by: Russ Anderson <rja@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Russ Anderson 2008-11-05 22:13:44 -06:00 committed by H. Peter Anvin
parent 64ccf2f9a7
commit e8929c8a6a
2 changed files with 17 additions and 1 deletions
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10
arch/x86/include/asm/uv/bios.h
View File

@ -34,7 +34,8 @@ enum uv_bios_cmd {
UV_BIOS_GET_SN_INFO, UV_BIOS_GET_SN_INFO,
UV_BIOS_FREQ_BASE, UV_BIOS_FREQ_BASE,
UV_BIOS_WATCHLIST_ALLOC, UV_BIOS_WATCHLIST_ALLOC,
UV_BIOS_WATCHLIST_FREE UV_BIOS_WATCHLIST_FREE,
UV_BIOS_MEMPROTECT
}; };
/* /*
@ -82,6 +83,12 @@ union uv_watchlist_u {
}; };
}; };
enum uv_memprotect {
UV_MEMPROT_RESTRICT_ACCESS,
UV_MEMPROT_ALLOW_AMO,
UV_MEMPROT_ALLOW_RW
};
/* /*
* bios calls have 6 parameters * bios calls have 6 parameters
*/ */
@ -94,6 +101,7 @@ extern s64 uv_bios_freq_base(u64, u64 *);
extern int uv_bios_mq_watchlist_alloc(int, void *, unsigned int, extern int uv_bios_mq_watchlist_alloc(int, void *, unsigned int,
unsigned long *); unsigned long *);
extern int uv_bios_mq_watchlist_free(int, int); extern int uv_bios_mq_watchlist_free(int, int);
extern s64 uv_bios_change_memprotect(u64, u64, enum uv_memprotect);
extern void uv_bios_init(void); extern void uv_bios_init(void);

8
arch/x86/kernel/bios_uv.c
View File

@ -134,6 +134,14 @@ uv_bios_mq_watchlist_free(int blade, int watchlist_num)
} }
EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free); EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
s64
uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
{
return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
perms, 0, 0);
}
EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second) s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
{ {
return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type, return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,