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54183d103d38e5efefce8500ec41dfbfaba9c19d
linux/arch/x86/kernel
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Nikolay Borisov 54183d103d x86/kexec: Remove spurious unconditional JMP from from identity_mapped() 
This seemingly straightforward JMP was introduced in the initial version
of the the 64bit kexec code without any explanation.

It turns out (check accompanying Link) it's likely a copy/paste artefact
from 32-bit code, where such a JMP could be used as a serializing
instruction for the 486's prefetch queue. On x86_64 that's not needed
because there's already a preceding write to cr4 which itself is
a serializing operation.

  [ bp: Typos. Let's try this and see what cries out. If it does,
    reverting it is trivial. ]

Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/all/55bc0649-c017-49ab-905d-212f140a403f@citrix.com/
2024-06-17 17:45:19 +02:00
..
acpi
Merge tag 'acpi-6.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2024-03-13 11:54:05 -07:00
apic
genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline
2024-05-23 21:51:50 +02:00
cpu
x86/resctrl: Replace open coded cacheinfo searches
2024-06-10 08:50:12 +02:00
fpu
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2024-05-15 14:46:43 -07:00
kprobes
Merge tag 'probes-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2024-05-17 18:29:30 -07:00
.gitignore
…
alternative.c
x86/alternatives: Use the correct length when optimizing NOPs
2024-05-17 09:27:06 +02:00
amd_gart_64.c
change alloc_pages name in dma_map_ops to avoid name conflicts
2024-04-25 20:55:53 -07:00
amd_nb.c
x86/amd_nb: Check for invalid SMN reads
2024-06-05 21:23:34 +02:00
aperture_64.c
x86/pci: Use PCI_HEADER_TYPE_* instead of literals
2023-12-01 15:00:43 -06:00
apm_32.c
x86/apm_32: Remove dead function apm_get_battery_status()
2024-02-21 19:38:03 +01:00
asm-offsets_32.c
…
asm-offsets_64.c
x86: Fixup asm-offsets duplicate
2022-10-17 16:41:06 +02:00
asm-offsets.c
x86/bugs: Rename CONFIG_CALL_DEPTH_TRACKING => CONFIG_MITIGATION_CALL_DEPTH_TRACKING
2024-01-10 10:52:28 +01:00
audit_64.c
x86/audit: Fix -Wmissing-variable-declarations warning for ia32_xyz_class
2023-08-30 10:11:16 +02:00
bootflag.c
…
callthunks.c
x86/alternatives: Use a temporary buffer when optimizing NOPs
2024-04-09 18:08:11 +02:00
cet.c
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
cfi.c
cfi: Flip headers
2023-12-15 16:25:55 -08:00
check.c
…
cpuid.c
x86/cpuid: make cpuid_class a static const structure
2023-08-05 08:31:41 +02:00
crash_dump_32.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
crash_dump_64.c
use less confusing names for iov_iter direction initializers
2022-11-25 13:01:55 -05:00
crash.c
crash: add a new kexec flag for hotplug support
2024-04-23 14:59:01 +10:00
devicetree.c
x86/of: Change x86_dtb_parse_smp_config() to static
2024-04-03 08:49:56 +02:00
doublefault_32.c
x86: Avoid missing-prototype warnings for doublefault code
2023-05-18 11:56:18 -07:00
dumpstack_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack_64.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
dumpstack.c
x86/dumpstack: Use uniform "Oops: " prefix for die() messages
2024-03-27 08:45:19 +01:00
e820.c
x86/e820: Add a new e820 table update helper
2024-04-29 11:15:31 +02:00
early_printk.c
x86/earlyprintk: Clean up pciserial
2022-08-29 12:19:25 +02:00
early-quirks.c
x86/pci: Use PCI_HEADER_TYPE_* instead of literals
2023-12-01 15:00:43 -06:00
ebda.c
…
eisa.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00
espfix_64.c
x86/fred: No ESPFIX needed when FRED is enabled
2024-01-31 22:01:51 +01:00
fred.c
x86/fred: Add FRED initialization functions
2024-01-31 22:03:32 +01:00
ftrace_32.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
ftrace_64.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
ftrace.c
x86/ftrace: enable dynamic ftrace without CONFIG_MODULES
2024-05-14 00:31:44 -07:00
head32.c
x86/microcode/32: Move early loading after paging enable
2023-10-18 22:15:01 +02:00
head64.c
x86/boot/64: Move 5-level paging global variable assignments back
2024-03-24 05:00:36 +01:00
head_32.S
Merge tag 'x86-cleanups-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-05-13 18:21:24 -07:00
head_64.S
Merge tag 'x86-cleanups-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-05-13 18:21:24 -07:00
hpet.c
x86/apic/msi: Use DOMAIN_BUS_GENERIC_MSI for HPET/IO-APIC domain search
2024-02-25 18:53:08 +01:00
hw_breakpoint.c
x86/amd: Cache debug register values in percpu variables
2023-01-31 20:09:26 +01:00
i8237.c
…
i8253.c
…
i8259.c
x86/i8259: Skip probing when ACPI/MADT advertises PCAT compatibility
2023-10-27 20:36:49 +02:00
ibt_selftest.S
x86/ibt: Convert IBT selftest to asm
2023-08-17 17:07:09 +02:00
idt.c
x86/irq: Install posted MSI notification handler
2024-04-30 00:54:42 +02:00
io_delay.c
…
ioport.c
…
irq_32.c
x86/percpu: Move irq_stack variables next to current_task
2022-10-17 16:41:05 +02:00
irq_64.c
fix missing vmalloc.h includes
2024-04-25 20:55:49 -07:00
irq_work.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
irq.c
x86/irq: Factor out common code for checking pending interrupts
2024-04-30 00:54:43 +02:00
irqflags.S
x86/headers: Replace #include <asm/export.h> with #include <linux/export.h>
2023-10-03 10:38:07 +02:00
irqinit.c
x86/fred: Invoke FRED initialization code to enable FRED
2024-01-31 22:03:36 +01:00
itmt.c
arch/x86: Remove now superfluous sentinel elem from ctl_table arrays
2023-10-10 15:22:02 -07:00
jailhouse.c
x86/jailhouse: Use new APIC registration function
2024-02-15 22:07:42 +01:00
jump_label.c
jump_label: make initial NOP patching the special case
2022-06-24 09:48:55 +02:00
kdebugfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-09 12:49:44 +01:00
kexec-bzimage64.c
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
kgdb.c
x86/kgdb: Fix a kerneldoc warning when build with W=1
2023-09-24 11:00:13 +02:00
ksysfs.c
x86/boot: Fix memremap of setup_indirect structures
2022-03-09 12:49:44 +01:00
kvm.c
Merge tag 'v6.9-rc3' into locking/core, to pick up fixes
2024-04-09 09:48:09 +02:00
kvmclock.c
kvmclock: Unexport kvmclock clocksource
2024-02-07 17:05:21 +01:00
ldt.c
x86/bugs: Rename CONFIG_PAGE_TABLE_ISOLATION => CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
2024-01-10 10:52:28 +01:00
machine_kexec_32.c
…
machine_kexec_64.c
x86/kexec: Fix bug with call depth tracking
2024-06-03 17:19:03 +02:00
Makefile
Merge tag 'kbuild-v6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2024-05-18 12:39:20 -07:00
mmconf-fam10h_64.c
…
module.c
arch: make execmem setup available regardless of CONFIG_MODULES
2024-05-14 00:31:44 -07:00
mpparse.c
x86/mpparse: Register APIC address only once
2024-03-23 12:41:48 +01:00
msr.c
x86/MSR: make msr_class a static const structure
2023-08-05 08:31:42 +02:00
nmi_selftest.c
x86/apic: Wrap IPI calls into helper functions
2023-08-09 12:00:55 -07:00
nmi.c
x86/nmi: Upgrade NMI backtrace stall checks & messages
2024-03-26 10:07:59 +01:00
paravirt-spinlocks.c
…
paravirt.c
x86/paravirt: Remove no longer needed paravirt patching code
2023-12-10 23:34:37 +01:00
pci-dma.c
x86: always initialize xen-swiotlb when xen-pcifront is enabling
2023-07-31 17:54:27 +02:00
pcspeaker.c
…
perf_regs.c
…
platform-quirks.c
x86/quirks: Include linux/pnp.h for arch_pnpbios_disabled()
2023-05-18 11:56:18 -07:00
pmem.c
x86/pmem: Fix platform-device leak in error path
2022-06-20 18:01:16 +02:00
probe_roms.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00
process_32.c
x86/fpu: Clean up FPU switching in the middle of task switching
2023-10-20 11:24:22 +02:00
process_64.c
x86/cpu: Fix check for RDPKRU in __show_regs()
2024-04-24 14:30:21 +02:00
process.c
Merge tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-03-11 19:53:15 -07:00
process.h
x86: Snapshot thread flags
2021-12-01 00:06:43 +01:00
ptrace.c
x86: Add PTRACE interface for shadow stack
2023-08-02 15:01:51 -07:00
pvclock.c
locking/atomic: treewide: use raw_atomic*_<op>()
2023-06-05 09:57:20 +02:00
quirks.c
…
reboot_fixups_32.c
…
reboot.c
x86, crash: wrap crash dumping code into crash related ifdefs
2024-02-23 17:48:23 -08:00
relocate_kernel_32.S
x86/kexec: Disable RET on kexec
2022-07-09 13:12:32 +02:00
relocate_kernel_64.S
x86/kexec: Remove spurious unconditional JMP from from identity_mapped()
2024-06-17 17:45:19 +02:00
resource.c
x86/PCI: Tidy E820 removal messages
2022-12-10 10:33:11 -06:00
rethook.c
x86,rethook: Fix arch_rethook_trampoline() to generate a complete pt_regs
2022-03-28 19:38:51 -07:00
rtc.c
x86/rtc: Remove unused intel-mid.h
2024-04-03 08:24:48 -07:00
setup_percpu.c
x86/asm: Add DB flag to 32-bit percpu GDT entry
2023-12-20 10:57:51 +01:00
setup.c
Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-05-19 09:21:03 -07:00
sev_verify_cbit.S
x86/boot: Use 32-bit XOR to clear registers
2024-03-01 12:47:37 +01:00
sev-shared.c
x86/sev: Check for MWAITX and MONITORX opcodes in the #VC handler
2024-04-22 18:38:28 +02:00
sev.c
Merge tag 'x86_sev_for_v6.10_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-05-14 09:18:52 -07:00
shstk.c
x86/shstk: Enable shadow stacks for x32
2024-03-22 10:17:11 +01:00
signal_32.c
x86/syscall/compat: Remove ia32_unistd.h
2024-03-22 09:37:09 +01:00
signal_64.c
x86/shstk: Enable shadow stacks for x32
2024-03-22 10:17:11 +01:00
signal.c
rseq: Split out rseq.h from sched.h
2023-12-27 11:49:56 -05:00
smp.c
Merge tag 'mm-stable-2024-03-13-20-04' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2024-03-14 17:43:30 -07:00
smpboot.c
x86/cpu: Switch to new Intel CPU model defines
2024-04-29 10:31:30 +02:00
stacktrace.c
x86: remove __range_not_ok()
2022-02-25 09:36:05 +01:00
static_call.c
x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK
2024-01-10 10:52:29 +01:00
step.c
x86/msr: Prepare for including <linux/percpu.h> into <asm/msr.h>
2024-03-04 12:01:39 +01:00
sys_ia32.c
…
sys_x86_64.c
x86/mm: care about shadow stack guard gap during placement
2024-04-25 20:56:28 -07:00
tboot.c
mm: remove rb tree.
2022-09-26 19:46:16 -07:00
time.c
…
tls.c
x86/gsseg: Move load_gs_index() to its own new header file
2023-01-12 13:06:36 +01:00
tls.h
…
trace_clock.c
…
trace.c
trace/osnoise: Fix an ifdef comment
2021-10-25 23:02:36 -04:00
tracepoint.c
x86/traceponit: Fix comment about irq vector tracepoints
2022-05-26 22:03:52 -04:00
traps.c
Merge tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-03-11 19:53:15 -07:00
tsc_msr.c
x86/tsc_msr: Switch to new Intel CPU model defines
2024-04-29 10:31:34 +02:00
tsc_sync.c
x86/tsc: Trust initial offset in architectural TSC-adjust MSRs
2024-04-29 23:27:16 +02:00
tsc.c
Merge tag 'x86-cpu-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-05-13 18:44:44 -07:00
umip.c
x86/umip: Downgrade warning messages to debug loglevel
2021-09-25 13:23:28 +02:00
unwind_frame.c
x86: kmsan: don't instrument stack walking functions
2022-10-03 14:03:25 -07:00
unwind_guess.c
x86/unwind: Recover kretprobe trampoline entry
2021-09-30 21:24:07 -04:00
unwind_orc.c
x86/unwind/orc: Remove redundant initialization of 'mid' pointer in __orc_find()
2023-09-21 08:41:23 +02:00
uprobes.c
uprobes/x86: Allow to probe a NOP instruction with 0x66 prefix
2022-12-05 11:55:18 +01:00
verify_cpu.S
x86: Prepare asm files for straight-line-speculation
2021-12-08 12:25:37 +01:00
vm86_32.c
x86/32: Remove lazy GS macros
2022-04-14 14:09:43 +02:00
vmcore_info_32.c
crash: split vmcoreinfo exporting code out from crash_core.c
2024-02-23 17:48:22 -08:00
vmcore_info_64.c
crash: split vmcoreinfo exporting code out from crash_core.c
2024-02-23 17:48:22 -08:00
vmlinux.lds.S
Merge tag 'x86-build-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2024-05-13 18:05:08 -07:00
vsmp_64.c
x86/apic: Remove unused phys_pkg_id() callback
2024-02-15 22:07:38 +01:00
x86_init.c
x86/sev: Skip ROM range scans and validation for SEV-SNP guests
2024-03-26 15:22:35 +01:00