linux-kernel - [PATCH 32/33] x86: Use walk_system_ream_range() instead of referring e820.map directly for tboot

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: <1270001838-15857-33-git-send-email-yinghai@kernel.org>
Date:	Tue, 30 Mar 2010 19:17:17 -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 32/33] x86: Use walk_system_ream_range() instead of referring e820.map directly for tboot

So we can make e820 to be __initdata

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/kernel/tboot.c |   22 +++++++++-------------
 1 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index cc2c604..cf27d64 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -170,34 +170,30 @@ static void tboot_create_trampoline(void)
 
 #ifdef CONFIG_ACPI_SLEEP
 
-static void add_mac_region(phys_addr_t start, unsigned long size)
+static int
+add_mac_region(unsigned long start_pfn, unsigned long nr_pages, void  *arg)
 {
+	u64 start = start_pfn;
+	u64 size = nr_pages;
 	struct tboot_mac_region *mr;
-	phys_addr_t end = start + size;
 
 	if (tboot->num_mac_regions >= MAX_TB_MAC_REGIONS)
 		panic("tboot: Too many MAC regions\n");
 
 	if (start && size) {
 		mr = &tboot->mac_regions[tboot->num_mac_regions++];
-		mr->start = round_down(start, PAGE_SIZE);
-		mr->size  = round_up(end, PAGE_SIZE) - mr->start;
+		mr->start = start << PAGE_SHIFT;
+		mr->size  = (u32) (size << PAGE_SHIFT);
 	}
+
+	return 0;
 }
 
 static int tboot_setup_sleep(void)
 {
-	int i;
-
 	tboot->num_mac_regions = 0;
 
-	for (i = 0; i < e820.nr_map; i++) {
-		if ((e820.map[i].type != E820_RAM)
-		 && (e820.map[i].type != E820_RESERVED_KERN))
-			continue;
-
-		add_mac_region(e820.map[i].addr, e820.map[i].size);
-	}
+	walk_system_ram_range(0, max_pfn, NULL, add_mac_region);
 
 	tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address;
 
-- 
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/