| 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
| ||
|
Message-Id: <20230706222027.189117-13-eric.devolder@oracle.com>
Date: Thu, 6 Jul 2023 18:20:26 -0400
From: Eric DeVolder <eric.devolder@...cle.com>
To: linux@...linux.org.uk, catalin.marinas@....com, will@...nel.org,
chenhuacai@...nel.org, geert@...ux-m68k.org,
tsbogend@...ha.franken.de, James.Bottomley@...senPartnership.com,
deller@....de, ysato@...rs.sourceforge.jp, dalias@...c.org,
glaubitz@...sik.fu-berlin.de, tglx@...utronix.de, mingo@...hat.com,
bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-ia64@...r.kernel.org, loongarch@...ts.linux.dev,
linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
linux-sh@...r.kernel.org
Cc: kernel@...0n.name, mpe@...erman.id.au, npiggin@...il.com,
christophe.leroy@...roup.eu, paul.walmsley@...ive.com,
palmer@...belt.com, aou@...s.berkeley.edu, hca@...ux.ibm.com,
gor@...ux.ibm.com, agordeev@...ux.ibm.com,
borntraeger@...ux.ibm.com, svens@...ux.ibm.com, hpa@...or.com,
keescook@...omium.org, paulmck@...nel.org, peterz@...radead.org,
frederic@...nel.org, akpm@...ux-foundation.org, ardb@...nel.org,
samitolvanen@...gle.com, juerg.haefliger@...onical.com,
arnd@...db.de, rmk+kernel@...linux.org.uk,
linus.walleij@...aro.org, sebastian.reichel@...labora.com,
rppt@...nel.org, kirill.shutemov@...ux.intel.com,
anshuman.khandual@....com, ziy@...dia.com, masahiroy@...nel.org,
ndesaulniers@...gle.com, mhiramat@...nel.org, ojeda@...nel.org,
thunder.leizhen@...wei.com, xin3.li@...el.com, tj@...nel.org,
gregkh@...uxfoundation.org, tsi@...oix.net, bhe@...hat.com,
hbathini@...ux.ibm.com, sourabhjain@...ux.ibm.com,
eric.devolder@...cle.com, boris.ostrovsky@...cle.com,
konrad.wilk@...cle.com
Subject: [PATCH v5 12/13] s390/kexec: refactor for kernel/Kconfig.kexec
The kexec and crash kernel options are provided in the common
kernel/Kconfig.kexec. Utilize the common options and provide
the ARCH_SUPPORTS_ and ARCH_SELECTS_ entries to recreate the
equivalent set of KEXEC and CRASH options.
NOTE: The original Kconfig has a KEXEC_SIG which depends on
MODULE_SIG_FORMAT. However, attempts to keep the MODULE_SIG_FORMAT
dependency (using the strategy outlined in this series, and other
techniques) results in 'error: recursive dependency detected'
on CRYPTO.
Per Alexander Gordeev <agordeev@...ux.ibm.com>: "the MODULE_SIG_FORMAT
dependency was introduced with [git commit below] and in fact was not
necessary, since s390 did/does not use mod_check_sig() anyway.
commit c8424e776b09 ("MODSIGN: Export module signature definitions")
MODULE_SIG_FORMAT is needed to select SYSTEM_DATA_VERIFICATION. But
SYSTEM_DATA_VERIFICATION is also selected by FS_VERITY*, so dropping
MODULE_SIG_FORMAT does not hurt."
Therefore, the solution is to drop the MODULE_SIG_FORMAT dependency
from KEXEC_SIG. Still results in equivalent .config files for s390.
Signed-off-by: Eric DeVolder <eric.devolder@...cle.com>
Acked-by: Alexander Gordeev <agordeev@...ux.ibm.com>
---
arch/s390/Kconfig | 69 ++++++++++++++++-------------------------------
1 file changed, 23 insertions(+), 46 deletions(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 5b39918b7042..44154246e4b7 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -213,6 +213,7 @@ config S390
select HAVE_VIRT_CPU_ACCOUNTING_IDLE
select IOMMU_HELPER if PCI
select IOMMU_SUPPORT if PCI
+ select KEXEC
select MMU_GATHER_MERGE_VMAS
select MMU_GATHER_NO_GATHER
select MMU_GATHER_RCU_TABLE_FREE
@@ -244,6 +245,28 @@ config PGTABLE_LEVELS
source "kernel/livepatch/Kconfig"
+config ARCH_DEFAULT_KEXEC
+ def_bool y
+
+config ARCH_SUPPORTS_KEXEC
+ def_bool y
+
+config ARCH_SUPPORTS_KEXEC_FILE
+ def_bool CRYPTO && CRYPTO_SHA256 && CRYPTO_SHA256_S390
+
+config ARCH_SUPPORTS_KEXEC_SIG
+ def_bool y
+
+config ARCH_HAS_KEXEC_PURGATORY
+ def_bool KEXEC_FILE
+
+config ARCH_SUPPORTS_CRASH_DUMP
+ def_bool y
+ help
+ Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
+ This option also enables s390 zfcpdump.
+ See also <file:Documentation/s390/zfcpdump.rst>
+
menu "Processor type and features"
config HAVE_MARCH_Z10_FEATURES
@@ -482,36 +505,6 @@ config SCHED_TOPOLOGY
source "kernel/Kconfig.hz"
-config KEXEC
- def_bool y
- select KEXEC_CORE
-
-config KEXEC_FILE
- bool "kexec file based system call"
- select KEXEC_CORE
- depends on CRYPTO
- depends on CRYPTO_SHA256
- depends on CRYPTO_SHA256_S390
- help
- Enable the kexec file based system call. In contrast to the normal
- kexec system call this system call takes file descriptors for the
- kernel and initramfs as arguments.
-
-config ARCH_HAS_KEXEC_PURGATORY
- def_bool y
- depends on KEXEC_FILE
-
-config KEXEC_SIG
- bool "Verify kernel signature during kexec_file_load() syscall"
- depends on KEXEC_FILE && MODULE_SIG_FORMAT
- help
- This option makes kernel signature verification mandatory for
- the kexec_file_load() syscall.
-
- In addition to that option, you need to enable signature
- verification for the corresponding kernel image type being
- loaded in order for this to work.
-
config KERNEL_NOBP
def_bool n
prompt "Enable modified branch prediction for the kernel by default"
@@ -733,22 +726,6 @@ config VFIO_AP
endmenu
-menu "Dump support"
-
-config CRASH_DUMP
- bool "kernel crash dumps"
- select KEXEC
- help
- Generate crash dump after being started by kexec.
- Crash dump kernels are loaded in the main kernel with kexec-tools
- into a specially reserved region and then later executed after
- a crash by kdump/kexec.
- Refer to <file:Documentation/s390/zfcpdump.rst> for more details on this.
- This option also enables s390 zfcpdump.
- See also <file:Documentation/s390/zfcpdump.rst>
-
-endmenu
-
config CCW
def_bool y
--
2.31.1
Powered by blists - more mailing lists