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Commit e8929c8a authored by Russ Anderson's avatar Russ Anderson Committed by H. Peter Anvin
Browse files

x86: uv: Add UV memory protection bios call 



Add UV bios call to change memory protections.

Signed-off-by: default avatarRuss Anderson <rja@sgi.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 64ccf2f9

arch/x86/include/asm/uv/bios.h

+9 −1
Original line number Diff line number Diff line
@@ -34,7 +34,8 @@ enum uv_bios_cmd { 
	UV_BIOS_GET_SN_INFO,

	UV_BIOS_FREQ_BASE,

	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

 */
@@ -94,6 +101,7 @@ extern s64 uv_bios_freq_base(u64, u64 *); 
extern int uv_bios_mq_watchlist_alloc(int, void *, unsigned int,

					unsigned long *);

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);

arch/x86/kernel/bios_uv.c

+8 −0
Original line number Diff line number Diff line
@@ -134,6 +134,14 @@ uv_bios_mq_watchlist_free(int blade, int watchlist_num) 
}

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)

{

	return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,