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Message-ID: <tip-8e30524dcc0d0ac1a18a5cee482b9d9cde3cb332@git.kernel.org>
Date: Sun, 30 Sep 2012 20:37:06 -0700
From: tip-bot for Thomas Renninger <trenn@...e.de>
To: linux-tip-commits@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
yinghai@...nel.org, lenb@...nel.org, eric.piel@...mplin-utc.net,
tglx@...utronix.de, trenn@...e.de, hpa@...ux.intel.com,
robert.moore@...el.com
Subject: [tip:x86/acpi] x86, acpi:
Introduce x86 arch specific arch_reserve_mem_area() for e820 handling
Commit-ID: 8e30524dcc0d0ac1a18a5cee482b9d9cde3cb332
Gitweb: http://git.kernel.org/tip/8e30524dcc0d0ac1a18a5cee482b9d9cde3cb332
Author: Thomas Renninger <trenn@...e.de>
AuthorDate: Mon, 1 Oct 2012 00:23:53 +0200
Committer: H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Sun, 30 Sep 2012 18:03:13 -0700
x86, acpi: Introduce x86 arch specific arch_reserve_mem_area() for e820 handling
This is needed for ACPI table overriding via initrd. Beside reserving
memblocks, X86 also requires to flag the memory area to E820_RESERVED or
E820_ACPI in the e820 mappings to be able to io(re)map it later.
Signed-off-by: Thomas Renninger <trenn@...e.de>
Link: http://lkml.kernel.org/r/1349043837-22659-3-git-send-email-trenn@suse.de
Cc: Len Brown <lenb@...nel.org>
Cc: Robert Moore <robert.moore@...el.com>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Eric Piel <eric.piel@...mplin-utc.net>
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
arch/x86/kernel/acpi/boot.c | 6 ++++++
include/linux/acpi.h | 8 ++++++++
2 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index b2297e5..6b75777 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -1700,3 +1700,9 @@ int __acpi_release_global_lock(unsigned int *lock)
} while (unlikely (val != old));
return old & 0x1;
}
+
+void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
+{
+ e820_add_region(addr, size, E820_ACPI);
+ update_e820();
+}
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 4f2a762..946fd1e 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -426,6 +426,14 @@ void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
acpi_status acpi_os_prepare_sleep(u8 sleep_state,
u32 pm1a_control, u32 pm1b_control);
+#if CONFIG_X86
+void arch_reserve_mem_area(acpi_physical_address addr, size_t size);
+#else
+static inline void arch_reserve_mem_area(acpi_physical_address addr,
+ size_t size)
+{
+}
+#endif /* CONFIG_X86 */
#else
#define acpi_os_set_prepare_sleep(func, pm1a_ctrl, pm1b_ctrl) do { } while (0)
#endif
--
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