linux-kernel - [PATCH 04/17] x86, memblock: Add memblock_x86_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1280432737-1808-5-git-send-email-yinghai@kernel.org>
Date:	Thu, 29 Jul 2010 12:45:24 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Johannes Weiner <hannes@...xchg.org>, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 04/17] x86, memblock: Add memblock_x86_to_bootmem()

memblock_x86_to_bootmem() will reserve memblock.reserved.region in bootmem after bootmem is
set up.

We can use it to with all arches that support memblock later.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/include/asm/memblock.h |    1 +
 arch/x86/mm/memblock.c          |   28 ++++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/memblock.h b/arch/x86/include/asm/memblock.h
index c14219a..69cf853 100644
--- a/arch/x86/include/asm/memblock.h
+++ b/arch/x86/include/asm/memblock.h
@@ -4,5 +4,6 @@
 #define ARCH_DISCARD_MEMBLOCK
 
 u64 memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align);
+void memblock_x86_to_bootmem(u64 start, u64 end);
 
 #endif
diff --git a/arch/x86/mm/memblock.c b/arch/x86/mm/memblock.c
index c602afb..8101084 100644
--- a/arch/x86/mm/memblock.c
+++ b/arch/x86/mm/memblock.c
@@ -86,3 +86,31 @@ u64 __init memblock_x86_find_in_range_size(u64 start, u64 *sizep, u64 align)
 	return MEMBLOCK_ERROR;
 }
 
+#ifndef CONFIG_NO_BOOTMEM
+void __init memblock_x86_to_bootmem(u64 start, u64 end)
+{
+	int count;
+	u64 final_start, final_end;
+	struct memblock_region *r;
+
+	/* Take out region array itself */
+	memblock_free_reserved_regions();
+
+	count  = memblock.reserved.cnt;
+	pr_info("(%d early reservations) ==> bootmem [%010llx-%010llx]\n", count, start, end - 1);
+	for_each_memblock(reserved, r) {
+		pr_info("  [%010llx-%010llx] ", (u64)r->base, (u64)r->base + r->size - 1);
+		final_start = max(start, r->base);
+		final_end = min(end, r->base + r->size);
+		if (final_start >= final_end) {
+			pr_cont("\n");
+			continue;
+		}
+		pr_cont(" ==> [%010llx-%010llx]\n", final_start, final_end - 1);
+		reserve_bootmem_generic(final_start, final_end - final_start, BOOTMEM_DEFAULT);
+	}
+
+	/* Put region array back ? */
+	memblock_reserve_reserved_regions();
+}
+#endif
-- 
1.6.4.2

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/