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bc90aefa99
linux/arch/x86/kernel
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Vegard Nossum bc90aefa99 x86/asm: Add DB flag to 32-bit percpu GDT entry 
The D/B size flag for the 32-bit percpu GDT entry was not set.

The Intel manual (vol 3, section 3.4.5) only specifies the meaning of
this flag for three cases:

 1) code segments used for %cs -- doesn't apply here

 2) stack segments used for %ss -- doesn't apply

 3) expand-down data segments -- but we don't have the expand-down flag
    set, so it also doesn't apply here

The flag likely doesn't do anything here, although the manual does also
say: "This flag should always be set to 1 for 32-bit code and data
segments [...]" so we should probably do it anyway.

Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20231219151200.2878271-6-vegard.nossum@oracle.com
2023-12-20 10:57:51 +01:00
..
acpi - Ignore invalid x2APIC entries in order to not waste per-CPU data 2023-11-19 13:46:17 -08:00
apic Major microcode loader restructuring, cleanup and improvements by Thomas 2023-11-04 08:46:37 -10:00
cpu x86/asm: Always set A (accessed) flag in GDT descriptors 2023-12-20 10:57:51 +01:00
fpu - A kernel-doc fix 2023-10-30 12:36:41 -10:00
kprobes X86 core updates: 2023-08-30 10:10:31 -07:00
.gitignore
alternative.c x86/alternatives: Disable KASAN in apply_alternatives() 2023-10-12 20:27:16 +02:00
amd_gart_64.c x86/mm: Remove P*D_PAGE_MASK and P*D_PAGE_SIZE macros 2022-12-15 10:37:27 -08:00
amd_nb.c X86 core code updates: 2023-10-30 17:37:47 -10:00
aperture_64.c x86: Fix various duplicate-word comment typos 2022-08-15 19:17:52 +02:00
apm_32.c x86/asm: Replace magic numbers in GDT descriptors, script-generated change 2023-12-20 10:57:38 +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/tdx: Make TDX_HYPERCALL asm similar to TDX_MODULE_CALL 2023-09-12 16:28:13 -07:00
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/callthunks: Delete unused "struct thunk_desc" 2023-10-20 12:58:48 +02:00
cet.c x86/ibt: Convert IBT selftest to asm 2023-08-17 17:07:09 +02:00
cfi.c x86: Add support for CONFIG_CFI_CLANG 2022-09-26 10:13:16 -07:00
check.c
cpuid.c x86/cpuid: make cpuid_class a static const structure 2023-08-05 08:31:41 +02:00
crash_core_32.c
crash_core_64.c
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 ARM: 2023-09-07 13:52:20 -07:00
devicetree.c x86/of: Move the x86_flattree_get_config() call out of x86_dtb_init() 2023-10-02 21:30:09 +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/show_trace_log_lvl: Ensure stack pointer is aligned, again 2023-05-16 06:31:04 -07:00
e820.c x86/setup: Move duplicate boot_cpu_data definition out of the ifdeffery 2023-01-11 12:45:16 +01:00
early_printk.c x86/earlyprintk: Clean up pciserial 2022-08-29 12:19:25 +02:00
early-quirks.c drm/i915/rpl-p: Add PCI IDs 2022-04-19 17:14:09 -07:00
ebda.c
eisa.c
espfix_64.c x86/espfix: Use get_random_long() rather than archrandom 2022-10-31 20:12:50 +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: Remove unsued extern declaration ftrace_regs_caller_ret() 2023-07-10 21:38:13 -04:00
head32.c x86/microcode/32: Move early loading after paging enable 2023-10-18 22:15:01 +02:00
head64.c x86/asm: Always set A (accessed) flag in GDT descriptors 2023-12-20 10:57:51 +01:00
head_32.S Major microcode loader restructuring, cleanup and improvements by Thomas 2023-11-04 08:46:37 -10:00
head_64.S x86 MM handling code changes for v6.7: 2023-10-30 15:40:57 -10:00
hpet.c x86/msi: Fix compile error caused by CONFIG_GENERIC_MSI_IRQ=y && !CONFIG_X86_LOCAL_APIC 2023-10-12 08:13:27 +02:00
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/entry: Convert INT 0x80 emulation to IDTENTRY 2023-12-07 09:51:29 -08:00
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 x86/percpu: Move irq_stack variables next to current_task 2022-10-17 16:41:05 +02:00
irq_work.c x86/apic: Wrap IPI calls into helper functions 2023-08-09 12:00:55 -07:00
irq.c x86/apic: Nuke ack_APIC_irq() 2023-08-09 11:58:34 -07:00
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/i8259: Mark legacy PIC interrupts with IRQ_LEVEL 2023-01-16 17:24:56 +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/apic: Remove the pointless APIC version check 2023-08-09 11:58:19 -07:00
jump_label.c jump_label: make initial NOP patching the special case 2022-06-24 09:48:55 +02:00
kdebugfs.c
kexec-bzimage64.c docs: move x86 documentation into Documentation/arch/ 2023-03-30 12:58:51 -06:00
kgdb.c x86/kgdb: Fix a kerneldoc warning when build with W=1 2023-09-24 11:00:13 +02:00
ksysfs.c
kvm.c x86/apic: Use u32 for APIC IDs in global data 2023-10-10 14:38:18 +02:00
kvmclock.c x86/tsc: Provide sched_clock_noinstr() 2023-06-05 21:11:08 +02:00
ldt.c x86: allow get_locked_pte() to fail 2023-06-19 16:19:10 -07:00
machine_kexec_32.c
machine_kexec_64.c x86/kexec: remove unnecessary arch_kexec_kernel_image_load() 2023-04-08 13:45:38 -07:00
Makefile x86/boot/32: Disable stackprotector and tracing for mk_early_pgtbl_32() 2023-10-18 11:11:43 +02:00
mmconf-fam10h_64.c
module.c x86/alternative: Rename apply_ibt_endbr() 2023-07-10 09:52:23 +02:00
mpparse.c x86/apic: Sanitize APIC address setup 2023-08-09 11:58:20 -07:00
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 Major microcode loader restructuring, cleanup and improvements by Thomas 2023-11-04 08:46:37 -10:00
paravirt-spinlocks.c
paravirt.c x86/xen: move paravirt lazy code 2023-09-19 07:04:49 +02:00
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/kernel: Validate ROM memory before accessing when SEV-SNP is active 2022-04-06 13:23:09 +02:00
process_32.c x86/resctl: fix scheduler confusion with 'current' 2023-03-08 11:48:11 -08:00
process_64.c x86/shstk: Add ARCH_SHSTK_STATUS 2023-08-02 15:01:51 -07:00
process.c x86/shstk: Remove useless clone error handling 2023-09-19 09:18:34 -07:00
process.h
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/reboot: Expose VMCS crash hooks if and only if KVM_{INTEL,AMD} is enabled 2023-08-03 15:37:14 -07:00
relocate_kernel_32.S x86/kexec: Disable RET on kexec 2022-07-09 13:12:32 +02:00
relocate_kernel_64.S x86,objtool: Split UNWIND_HINT_EMPTY in two 2023-03-23 23:18:58 +01:00
resource.c x86/PCI: Tidy E820 removal messages 2022-12-10 10:33:11 -06:00
rethook.c
rtc.c x86/rtc: Simplify PNP ids check 2023-01-06 04:22:34 +01:00
setup_percpu.c x86/asm: Add DB flag to 32-bit percpu GDT entry 2023-12-20 10:57:51 +01:00
setup.c TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
sev_verify_cbit.S
sev-shared.c Take care of a race between when the #VC exception is raised and when 2023-10-19 18:12:08 -07:00
sev.c x86/sev: Fix kernel crash due to late update to read-only ghcb_version 2023-11-30 10:23:12 +01:00
shstk.c x86/shstk: Add warning for shadow stack double unmap 2023-09-19 09:18:34 -07:00
signal_32.c x86/shstk: Add user control-protection fault handler 2023-08-02 15:01:50 -07:00
signal_64.c x86/shstk: Delay signal entry SSP write until after user accesses 2023-11-08 08:55:37 -08:00
signal.c x86/shstk: Handle signals for shadow stack 2023-08-02 15:01:50 -07:00
smp.c Revert "x86/smp: Put CPUs into INIT on shutdown if possible" 2023-10-15 12:02:02 -07:00
smpboot.c Major microcode loader restructuring, cleanup and improvements by Thomas 2023-11-04 08:46:37 -10:00
stacktrace.c
static_call.c x86/static_call: Fix __static_call_fixup() 2023-08-17 13:24:09 +02:00
step.c ptrace: Reimplement PTRACE_KILL by always sending SIGKILL 2022-05-11 14:34:28 -05:00
sys_ia32.c
sys_x86_64.c x86/mm: Introduce MAP_ABOVE4G 2023-07-11 14:12:19 -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
topology.c cpu-hotplug: Provide prototypes for arch CPU registration 2023-10-11 14:27:37 +02:00
trace_clock.c
trace.c
tracepoint.c x86/traceponit: Fix comment about irq vector tracepoints 2022-05-26 22:03:52 -04:00
traps.c Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
tsc_msr.c
tsc_sync.c x86/tsc: Defer marking TSC unstable to a worker 2023-10-27 20:36:57 +02:00
tsc.c x86/tsc: Extend watchdog check exemption to 4-Sockets platform 2023-07-14 15:17:09 -07:00
umip.c
unwind_frame.c x86: kmsan: don't instrument stack walking functions 2022-10-03 14:03:25 -07:00
unwind_guess.c
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
vm86_32.c x86/32: Remove lazy GS macros 2022-04-14 14:09:43 +02:00
vmlinux.lds.S x86/srso: Disentangle rethunk-dependent options 2023-10-20 12:30:50 +02:00
vsmp_64.c x86/apic: Use u32 for phys_pkg_id() 2023-10-10 14:38:19 +02:00
x86_init.c - Fix a race window where load_unaligned_zeropad() could cause 2023-06-26 16:32:47 -07:00