Andi Kleen 919f18f961 x86/mtrr: Check if fixed MTRRs exist before saving them ...

MTRRs have an obsolete fixed variant for fine grained caching control
of the 640K-1MB region that uses separate MSRs. This fixed variant has
a separate capability bit in the MTRR capability MSR.

So far all x86 CPUs which support MTRR have this separate bit set, so it
went unnoticed that mtrr_save_state() does not check the capability bit
before accessing the fixed MTRR MSRs.

Though on a CPU that does not support the fixed MTRR capability this
results in a #GP.  The #GP itself is harmless because the RDMSR fault is
handled gracefully, but results in a WARN_ON().

Add the missing capability check to prevent this.

Fixes: 2b1f6278d77c ("[PATCH] x86: Save the MTRRs of the BSP before booting an AP")
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/all/20240808000244.946864-1-ak@linux.intel.com

2024-08-08 17:03:12 +02:00

..

acpi

x86/acpi: Remove __ro_after_init from acpi_mp_wake_mailbox

2024-08-07 20:04:38 +02:00

apic

genirq/cpuhotplug, x86/vector: Prevent vector leak during CPU offline

2024-05-23 21:51:50 +02:00

cpu

x86/mtrr: Check if fixed MTRRs exist before saving them

2024-08-08 17:03:12 +02:00

fpu

x86/alternative: Convert ALTERNATIVE_3()

2024-06-11 18:22:41 +02:00

kprobes

Probes updates for v6.10:

2024-05-17 18:29:30 -07:00

.gitignore

…

alternative.c

hardening updates for v6.11-rc1

2024-07-16 13:45:43 -07:00

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: Enhance SMN access error checking

2024-06-12 11:38:58 +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

x86/mm: Add callbacks to prepare encrypted memory for kexec

2024-06-17 17:46:02 +02:00

devicetree.c

x86/of: Return consistent error type from x86_of_pci_irq_enable()

2024-06-24 19:11:31 +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/mm: Make e820__end_ram_pfn() cover E820_TYPE_ACPI ranges

2024-06-17 17:46:08 +02:00

early_printk.c

x86/earlyprintk: Clean up pciserial

2022-08-29 12:19:25 +02:00

early-quirks.c

drm: move i915_pciids.h under include/drm/intel

2024-05-31 16:11:29 +03:00

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

x86/cleanups changes for v6.10:

2024-05-13 18:21:24 -07:00

head_64.S

x86/cleanups changes for v6.10:

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

sysctl: treewide: constify the ctl_table argument of proc_handlers

2024-07-24 20:59:29 +02:00

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

- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames

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

Linux 6.9-rc3

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

x86/sev: Move SEV compilation units

2024-07-11 11:55:58 +02:00

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: Fix incorrect virt spinlock setting on bare metal

2024-08-07 20:04:38 +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/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

x86/smp: Add smp_ops.stop_this_cpu() callback

2024-06-17 17:46:20 +02:00

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/smp: Add smp_ops.stop_this_cpu() callback

2024-06-17 17:46:20 +02:00

relocate_kernel_32.S

x86/kexec: Disable RET on kexec

2022-07-09 13:12:32 +02:00

relocate_kernel_64.S

x86/kexec: Keep CR4.MCE set during kexec for TDX guest

2024-06-17 17:45:50 +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

x86/setup: Parse the builtin command line before merging

2024-07-31 21:46:35 +02:00

sev_verify_cbit.S

x86/boot: Use 32-bit XOR to clear registers

2024-03-01 12:47:37 +01:00

shstk.c

uprobe: Add uretprobe syscall to speed up return probe

2024-06-12 08:44:28 +09:00

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

- Sumanth Korikkar has taught s390 to allocate hotplug-time page frames

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

x86: stop playing stack games in profile_pc()

2024-06-28 14:27:22 -07:00

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

…

tracepoint.c

x86/traceponit: Fix comment about irq vector tracepoints

2022-05-26 22:03:52 -04:00

traps.c

Core x86 changes for v6.9:

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

x86/tsc: Remove obsolete ART to TSC conversion functions

2024-06-03 11:18:51 +02:00

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

uprobe: Add uretprobe syscall to speed up return probe

2024-06-12 08:44:28 +09:00

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

runtime constants: add x86 architecture support

2024-06-19 12:34:34 -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/mm: Add callbacks to prepare encrypted memory for kexec

2024-06-17 17:46:02 +02:00