From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Renninger Subject: [PATCH 2/6] X86 ACPI: Introduce x86 arch specific arch_reserve_mem_area() for e820 handling Date: Tue, 25 Sep 2012 16:55:57 +0200 Message-ID: <1348584961-1476-3-git-send-email-trenn@suse.de> References: <1348584961-1476-1-git-send-email-trenn@suse.de> Return-path: In-Reply-To: <1348584961-1476-1-git-send-email-trenn@suse.de> Sender: linux-kernel-owner@vger.kernel.org To: hpa@zytor.com Cc: lenb@kernel.org, initramfs@vger.kernel.org, robert.moore@intel.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, yinghai@kernel.org, Thomas Renninger List-Id: linux-acpi@vger.kernel.org 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 --- arch/x86/kernel/acpi/boot.c | 6 ++++++ include/linux/acpi.h | 9 +++++++++ 2 files changed, 15 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..bf6a0ad 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -430,4 +430,13 @@ acpi_status acpi_os_prepare_sleep(u8 sleep_state, #define acpi_os_set_prepare_sleep(func, pm1a_ctrl, pm1b_ctrl) do { } while (0) #endif +#if CONFIG_X86 +void arch_reserve_mem_area(acpi_physical_address addr, size_t size); +#else +static inline void void arch_reserve_mem_area(acpi_physical_address addr, + size_t size) +{ +} +#endif /* CONFIG_X86 */ + #endif /*_LINUX_ACPI_H*/ -- 1.7.6.1