Merge tag 'iommu-updates-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 87d46cb..828d114 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -287,6 +287,17 @@
                        do not want to use tracing_snapshot_alloc() as it needs
                        to be done where GFP_KERNEL allocations are allowed.
 
+       allow_mismatched_32bit_el0 [ARM64]
+                       Allow execve() of 32-bit applications and setting of the
+                       PER_LINUX32 personality on systems where only a strict
+                       subset of the CPUs support 32-bit EL0. When this
+                       parameter is present, the set of CPUs supporting 32-bit
+                       EL0 is indicated by /sys/devices/system/cpu/aarch32_el0
+                       and hot-unplug operations may be restricted.
+
+                       See Documentation/arm64/asymmetric-32bit.rst for more
+                       information.
+
        amd_iommu=      [HW,X86-64]
                        Pass parameters to the AMD IOMMU driver in the system.
                        Possible values are:
@@ -377,6 +388,9 @@
        arm64.nopauth   [ARM64] Unconditionally disable Pointer Authentication
                        support
 
+       arm64.nomte     [ARM64] Unconditionally disable Memory Tagging Extension
+                       support
+
        ataflop=        [HW,M68k]
 
        atarimouse=     [HW,MOUSE] Atari Mouse
@@ -2416,6 +2430,23 @@
                        feature (tagged TLBs) on capable Intel chips.
                        Default is 1 (enabled)
 
+       l1d_flush=      [X86,INTEL]
+                       Control mitigation for L1D based snooping vulnerability.
+
+                       Certain CPUs are vulnerable to an exploit against CPU
+                       internal buffers which can forward information to a
+                       disclosure gadget under certain conditions.
+
+                       In vulnerable processors, the speculatively
+                       forwarded data can be used in a cache side channel
+                       attack, to access data to which the attacker does
+                       not have direct access.
+
+                       This parameter controls the mitigation. The
+                       options are:
+
+                       on         - enable the interface for the mitigation
+
        l1tf=           [X86] Control mitigation of the L1TF vulnerability on
                              affected CPUs
 
@@ -4162,6 +4193,15 @@
                        Format: <bool>  (1/Y/y=enable, 0/N/n=disable)
                        default: disabled
 
+       printk.console_no_auto_verbose=
+                       Disable console loglevel raise on oops, panic
+                       or lockdep-detected issues (only if lock debug is on).
+                       With an exception to setups with low baudrate on
+                       serial console, keeping this 0 is a good choice
+                       in order to provide more debug information.
+                       Format: <bool>
+                       default: 0 (auto_verbose is enabled)
+
        printk.devkmsg={on,off,ratelimit}
                        Control writing to /dev/kmsg.
                        on - unlimited logging to /dev/kmsg from userspace
@@ -4772,7 +4812,7 @@
 
        reboot=         [KNL]
                        Format (x86 or x86_64):
-                               [w[arm] | c[old] | h[ard] | s[oft] | g[pio]] \
+                               [w[arm] | c[old] | h[ard] | s[oft] | g[pio]] | d[efault] \
                                [[,]s[mp]#### \
                                [[,]b[ios] | a[cpi] | k[bd] | t[riple] | e[fi] | p[ci]] \
                                [[,]f[orce]
@@ -4940,8 +4980,6 @@
        sa1100ir        [NET]
                        See drivers/net/irda/sa1100_ir.c.
 
-       sbni=           [NET] Granch SBNI12 leased line adapter
-
        sched_verbose   [KNL] Enables verbose scheduler debug messages.
 
        schedstats=     [KNL,X86] Enable or disable scheduled statistics.