linux-kernel - [PATCH] x86/fixmap: Decouple KMAP_LOCAL from PCI

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>] [day] [month] [year] [list]

Message-Id: <20221002000415.945080-1-ira.weiny@intel.com>
Date:   Sat,  1 Oct 2022 17:04:15 -0700
From:   ira.weiny@...el.com
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Ira Weiny <ira.weiny@...el.com>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] x86/fixmap: Decouple KMAP_LOCAL from PCI_MMCONFIG

From: Ira Weiny <ira.weiny@...el.com>

In commit 14df32670291 ("x86: Support kmap_local() forced debugging")
FIX_PCIE_MCFG became dependent on KMAP_LOCAL.  This works because
CONFIG_KMAP_LOCAL depends on CONFIG_X86_32 which the commit changed.

config X86_32
        def_bool y
        depends on !64BIT
...
        select KMAP_LOCAL
...

However, there is no direct relationship between the two.  Adjust the
conditionals to make them independent of each other.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Bjorn Helgaas <helgaas@...nel.org>
Signed-off-by: Ira Weiny <ira.weiny@...el.com>
---
 arch/x86/include/asm/fixmap.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index d0dcefb5cc59..1c79398babf3 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -101,10 +101,10 @@ enum fixed_addresses {
 #ifdef CONFIG_KMAP_LOCAL
 	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
 	FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1,
+#endif
 #ifdef CONFIG_PCI_MMCONFIG
 	FIX_PCIE_MCFG,
 #endif
-#endif
 #ifdef CONFIG_PARAVIRT_XXL
 	FIX_PARAVIRT_BOOTMAP,
 #endif

base-commit: 274d7803837da78dfc911bcda0d593412676fc20
-- 
2.37.2