linux-kernel - [PATCH v6 13/14] x86: reserve setup_data ranges late after parsing memmap cmdline

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: <1387186235-15972-14-git-send-email-dyoung@redhat.com>
Date:	Mon, 16 Dec 2013 17:30:34 +0800
From:	Dave Young <dyoung@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-efi@...r.kernel.org, x86@...nel.org, mjg59@...f.ucam.org,
	hpa@...or.com, James.Bottomley@...senPartnership.com,
	vgoyal@...hat.com, ebiederm@...ssion.com, horms@...ge.net.au,
	kexec@...ts.infradead.org, bp@...en8.de, greg@...ah.com,
	matt@...sole-pimps.org, toshi.kani@...com,
	akpm@...ux-foundation.org, mingo@...nel.org, msalter@...hat.com,
	leif.lindholm@...aro.org
Subject: [PATCH v6 13/14] x86: reserve setup_data ranges late after parsing memmap cmdline

Currently e820_reserve_setup_data is called before parsing early params,
it works in normal case. But for memmap=exactmap, the final memory ranges
are created after parsing memmap= cmdline params, so the previous
e820_reserve_setup_data has no effect. For example, setup_data ranges
will still be marked as normal system ram, thus when later sysfs driver
ioremap them kernel will warn about mapping normal ram.

This patch fix it by moving the e820_reserve_setup_data callback after
parsing early params so they can be set as reserved ranges and later
ioremap will be fine with it.

changes:
Boris: improve patch description

Signed-off-by: Dave Young <dyoung@...hat.com>
Acked-by: Borislav Petkov <bp@...e.de>
---
 arch/x86/kernel/setup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index b2b54cd..a3357a6 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -927,8 +927,6 @@ void __init setup_arch(char **cmdline_p)
 	iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1;
 	setup_memory_map();
 	parse_setup_data();
-	/* update the e820_saved too */
-	e820_reserve_setup_data();
 
 	copy_edd();
 
@@ -990,6 +988,8 @@ void __init setup_arch(char **cmdline_p)
 		early_dump_pci_devices();
 #endif
 
+	/* update the e820_saved too */
+	e820_reserve_setup_data();
 	finish_e820_parsing();
 
 	if (efi_enabled(EFI_BOOT))
-- 
1.8.3.1

--
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/