From: Russ Anderson <rja@sgi.com>
To: Ingo Molnar <mingo@elte.hu>,
tglx@linutronix.de, linux-kernel@vger.kernel.org
Cc: Russ Anderson <rja@sgi.com>
Subject: [PATCH 2/3] x86: Add UV memory protection bios call
Date: Tue, 21 Oct 2008 15:01:12 -0500 [thread overview]
Message-ID: <20081021200112.GD32545@sgi.com> (raw)
Add UV bios call to change memory protections.
Signed-off-by: Russ Anderson <rja@sgi.com>
---
arch/x86/kernel/bios_uv.c | 8 ++++++++
include/asm-x86/uv/bios.h | 10 +++++++++-
2 files changed, 17 insertions(+), 1 deletion(-)
Index: linux/arch/x86/kernel/bios_uv.c
===================================================================
--- linux.orig/arch/x86/kernel/bios_uv.c 2008-10-21 14:55:18.000000000 -0500
+++ linux/arch/x86/kernel/bios_uv.c 2008-10-21 14:55:24.000000000 -0500
@@ -134,6 +134,14 @@ uv_bios_mq_watchlist_free(int blade, int
}
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,
Index: linux/include/asm-x86/uv/bios.h
===================================================================
--- linux.orig/include/asm-x86/uv/bios.h 2008-10-21 14:55:18.000000000 -0500
+++ linux/include/asm-x86/uv/bios.h 2008-10-21 14:55:24.000000000 -0500
@@ -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);
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc rja@sgi.com
next reply other threads:[~2008-10-21 20:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-21 20:01 Russ Anderson [this message]
2008-10-22 6:22 ` [PATCH 2/3] x86: Add UV memory protection bios call Ingo Molnar
2008-10-22 14:40 ` Russ Anderson
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