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linux/arch/powerpc/kernel
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Nicholas Piggin 08685be776 powerpc/64s: fix scv entry fallback flush vs interrupt 
The L1D flush fallback functions are not recoverable vs interrupts,
yet the scv entry flush runs with MSR[EE]=1. This can result in a
timer (soft-NMI) or MCE or SRESET interrupt hitting here and overwriting
the EXRFI save area, which ends up corrupting userspace registers for
scv return.

Fix this by disabling RI and EE for the scv entry fallback flush.

Fixes: f79643787e ("powerpc/64s: flush L1D on kernel entry")
Cc: stable@vger.kernel.org # 5.9+ which also have flush L1D patch backport
Reported-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210111062408.287092-1-npiggin@gmail.com
2021-01-20 15:58:19 +11:00
..
ptrace powerpc/ptrace-view: Use pt_regs values instead of thread_struct based one. 2020-12-04 01:01:26 +11:00
syscalls epoll: wire up syscall epoll_pwait2 2020-12-19 11:18:38 -08:00
trace powerpc: Add a ppc_inst_as_str() helper 2020-07-23 17:41:36 +10:00
vdso32 powerpc/vdso: Don't pass 64-bit ABI cflags to 32-bit VDSO 2020-12-21 22:06:26 +11:00
vdso64 powerpc/vdso: Block R_PPC_REL24 relocations 2020-12-21 22:06:25 +11:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
align.c powerpc: Use fallthrough pseudo-keyword 2020-07-29 21:09:37 +10:00
asm-offsets.c powerpc/book3s64/pkeys: Store/restore userspace AMR/IAMR correctly on entry and exit from kernel 2020-12-04 01:01:25 +11:00
audit.c
btext.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
cacheinfo.c powerpc/cacheinfo: Print correct cache-sibling map/list for L2 cache 2020-12-11 00:10:25 +11:00
cacheinfo.h powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild 2019-06-15 16:52:06 +10:00
compat_audit.c
cpu_setup_6xx.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
cpu_setup_44x.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cpu_setup_fsl_booke.S powerpc: Retire e200 core (mpc555x processor) 2020-12-05 21:49:18 +11:00
cpu_setup_pa6t.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
cpu_setup_power.c powerpc/perf: MMCR0 control for PMU registers under PMCC=00 2020-12-04 01:01:29 +11:00
cpu_setup_ppc970.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
cputable.c powerpc/32s: Make support for 603 and 604+ selectable 2020-12-09 16:48:59 +11:00
crash_dump.c powerpc: Add prefixed instructions to instruction data type 2020-05-19 00:10:39 +10:00
dawr.c powerpc/watchpoint: Guest support for 2nd DAWR hcall 2020-07-26 23:34:19 +10:00
dbell.c powerpc: Inline doorbell sending functions 2020-07-29 21:02:09 +10:00
dma-iommu.c powerpc/dma: Fallback to dma_ops when persistent memory present 2020-11-27 10:33:42 +01:00
dma-mask.c
dma-swiotlb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dt_cpu_ftrs.c powerpc/64s: Remove idle workaround code from restore_cpu_cpufeatures 2020-12-10 23:13:26 +11:00
early_32.c powerpc/fsl_booke/32: implement KASLR infrastructure 2019-11-13 19:27:40 +11:00
eeh_cache.c powerpc/eeh_cache: Fix a possible debugfs deadlock 2020-11-02 12:54:20 +11:00
eeh_driver.c pci-v5.9-changes 2020-08-07 18:48:15 -07:00
eeh_event.c powerpc/eeh: Fix build with STACKTRACE=n 2019-09-14 00:01:14 +10:00
eeh_pe.c powerpc/eeh: Delete eeh_pe->config_addr 2020-10-07 22:34:47 +11:00
eeh_sysfs.c powerpc/eeh: Pass eeh_dev to eeh_ops->resume_notify() 2020-07-26 23:34:20 +10:00
eeh.c powerpc/eeh: Fix eeh_dev_check_failure() for PE#0 2020-10-22 10:38:53 +11:00
entry_32.S powerpc/fault: Perform exception fixup in do_page_fault() 2020-12-09 23:48:14 +11:00
entry_64.S powerpc/64s: fix scv entry fallback flush vs interrupt 2021-01-20 15:58:19 +11:00
epapr_hcalls.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
epapr_paravirt.c powerpc: Use a datatype for instructions 2020-05-19 00:10:37 +10:00
exceptions-64e.S powerpc/fault: Perform exception fixup in do_page_fault() 2020-12-09 23:48:14 +11:00
exceptions-64s.S powerpc/64s: fix scv entry fallback flush vs interrupt 2021-01-20 15:58:19 +11:00
fadump.c powerpc updates for 5.10 2020-10-16 12:21:15 -07:00
firmware.c powerpc: Reintroduce is_kvm_guest() as a fast-path check 2020-12-04 01:01:22 +11:00
fpu.S powerpc: Drop SYNC_601() ISYNC_601() and SYNC() 2020-10-08 21:17:13 +11:00
fsl_booke_entry_mapping.S powerpc/fsl_booke/32: implement KASLR infrastructure 2019-11-13 19:27:40 +11:00
head_8xx.S powerpc/8xx: Use SPRN_SPRG_SCRATCH2 in DTLB miss exception 2020-12-09 23:48:13 +11:00
head_32.h powerpc/32: Fix vmap stack - Properly set r1 before activating MMU on syscall too 2020-12-21 22:24:00 +11:00
head_40x.S powerpc/40x: Always fault when _PAGE_ACCESSED is not set 2020-11-05 23:34:16 +11:00
head_44x.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
head_64.S powerpc/64s: Remove MSR[ISF] bit 2020-12-09 23:48:14 +11:00
head_book3s_32.S powerpc/32s: Fix RTAS machine check with VMAP stack 2021-01-04 23:59:25 +11:00
head_booke.h powerpc: Retire e200 core (mpc555x processor) 2020-12-05 21:49:18 +11:00
head_fsl_booke.S powerpc: Retire e200 core (mpc555x processor) 2020-12-05 21:49:18 +11:00
hw_breakpoint_constraints.c powerpc/watchpoint: Move DAWR detection logic outside of hw_breakpoint.c 2020-09-15 22:13:19 +10:00
hw_breakpoint.c powerpc/watchpoint: Workaround P10 DD1 issue with VSX-32 byte instructions 2020-12-11 00:09:10 +11:00
idle_6xx.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
idle_book3e.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
idle_book3s.S powerpc/64s: Reimplement power4_idle code in C 2020-01-16 14:59:37 +10:00
idle_e500.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
idle.c sched/idle: Fix arch_cpu_idle() vs tracing 2020-11-24 16:47:35 +01:00
ima_arch.c powerpc/ima: Fix secure boot rules in ima arch policy 2020-05-07 17:25:54 +10:00
io-workarounds.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
iomap.c powerpc: inline iomap accessors 2020-12-04 01:01:09 +11:00
iommu.c dma-mapping: introduce dma_get_seg_boundary_nr_pages() 2020-09-03 18:12:15 +02:00
irq.c powerpc/64: irq replay remove decrementer overflow check 2020-12-09 23:48:15 +11:00
isa-bridge.c powerpc: remove __ioremap_at and __iounmap_at 2020-06-02 10:59:10 -07:00
jump_label.c powerpc: Use a datatype for instructions 2020-05-19 00:10:37 +10:00
kgdb.c maccess: make get_kernel_nofault() check for minimal type compatibility 2020-06-18 12:10:37 -07:00
kprobes-ftrace.c ftrace: Have the callbacks receive a struct ftrace_regs instead of pt_regs 2020-11-13 12:14:55 -05:00
kprobes.c powerpc: kprobes: Use generic kretprobe trampoline handler 2020-09-08 11:52:34 +02:00
kvm_emul.S powerpc/kvm: Add ifdefs around template code 2019-09-14 00:04:40 +10:00
kvm.c powerpc/kvm: Explicitly mark kvm guest code as __init 2019-09-14 00:04:40 +10:00
l2cr_6xx.S powerpc: Drop SYNC_601() ISYNC_601() and SYNC() 2020-10-08 21:17:13 +11:00
legacy_serial.c tty/serial: Migrate 8250_fsl to use has_sysrq 2019-12-18 15:04:42 +01:00
Makefile powerpc: Avoid broken GCC __attribute__((optimize)) 2020-11-19 14:50:14 +11:00
mce_power.c powerpc/64s/pseries: Add ERAT specific machine check handler 2020-12-04 01:01:23 +11:00
mce.c powerpc/64s: Remove "Host" from MCE logging 2020-12-04 01:01:23 +11:00
misc_32.S powerpc: Rewrite FSL_BOOKE flush_cache_instruction() in C 2020-09-02 11:00:21 +10:00
misc_64.S powerpc: Remove SYNC on non 6xx 2020-10-08 21:17:12 +11:00
misc.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
module_32.c powerpc: module_[32|64].c: replace swap function with built-in one 2020-05-11 23:15:14 +10:00
module_64.c maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
module.c powerpc: Use MODULES_VADDR if defined 2020-07-27 00:01:30 +10:00
msi.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
note.S powerpc: Add PowerPC Capabilities ELF note 2019-08-30 09:40:15 +10:00
nvram_64.c powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
of_platform.c powerpc/eeh: Remove eeh_dev_phb_init_dynamic() 2020-07-26 23:34:19 +10:00
optprobes_head.S powerpc: Add prefixed instructions to instruction data type 2020-05-19 00:10:39 +10:00
optprobes.c powerpc: Add ppc_inst_as_u64() 2020-05-26 23:36:57 +10:00
paca.c powerpc: Avoid broken GCC __attribute__((optimize)) 2020-11-19 14:50:14 +11:00
pci_32.c powerpc/64: Adjust order in pcibios_init() 2019-08-22 23:11:48 +10:00
pci_64.c powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
pci_dn.c powerpc/eeh: Rename eeh_{add_to|remove_from}_parent_pe() 2020-07-26 23:34:21 +10:00
pci_of_scan.c powerpc/pci: Remove pcibios_setup_bus_devices() 2020-01-06 16:25:29 +11:00
pci-common.c powerpc/pci: Remove LSI mappings on device teardown 2020-12-04 01:01:34 +11:00
pci-hotplug.c powerpc/eeh: Release EEH device state synchronously 2020-05-18 21:58:44 +10:00
pmc.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppc32.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppc_save_regs.S powerpc: Improve ppc_save_regs() 2020-04-04 21:40:57 +11:00
proc_powerpc.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
process.c powerpc/process: Remove target specific __set_dabr() 2020-12-09 17:01:40 +11:00
prom_init_check.sh powerpc/prom_init: Undo relocation before entering secure mode 2019-10-29 15:12:17 +11:00
prom_init.c powerpc: fix -Wimplicit-fallthrough 2020-11-18 14:18:09 -06:00
prom_parse.c
prom.c powerpc/feature: Remove CPU_FTR_NODSISRALIGN 2020-12-04 01:01:34 +11:00
reloc_32.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
reloc_64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
rtas_flash.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
rtas_pci.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
rtas-proc.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
rtas-rtc.c
rtas.c powerpc/rtas: Fix typo of ibm,open-errinjct in RTAS filter 2020-12-09 13:36:51 +11:00
rtasd.c powerpc/rtasd: simplify handle_rtas_event(), emit message on events 2020-07-16 13:12:38 +10:00
secure_boot.c powerpc/pseries: Detect secure and trusted boot state of the system. 2020-07-16 14:49:53 +10:00
security.c powerpc/security: Fix link stack flush instruction 2020-10-08 12:50:52 +11:00
secvar-ops.c powerpc/powernv: Add OPAL API interface to access secure variable 2019-11-13 00:33:22 +11:00
secvar-sysfs.c powerpc: expose secure variables to userspace via sysfs 2019-11-13 00:33:22 +11:00
setup_32.c powerpc: Remove ucache_bsize 2020-12-05 21:49:52 +11:00
setup_64.c Merge branch 'fixes' into next 2020-11-25 23:17:31 +11:00
setup-common.c powerpc: Remove ucache_bsize 2020-12-05 21:49:52 +11:00
setup.h powerpc: Avoid broken GCC __attribute__((optimize)) 2020-11-19 14:50:14 +11:00
signal_32.c powerpc/vdso: Retrieve sigtramp offsets at buildtime 2020-12-04 01:01:17 +11:00
signal_64.c powerpc/vdso: Retrieve sigtramp offsets at buildtime 2020-12-04 01:01:17 +11:00
signal.c powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
signal.h powerpc/signal: Create 'unsafe' versions of copy_[ck][fpr/vsx]_to_user() 2020-12-04 01:01:14 +11:00
smp-tbsync.c
smp.c powerpc/smp: Add __init to init_big_cores() 2020-12-21 22:06:10 +11:00
stacktrace.c kernel: rename show_stack_loglvl() => show_stack() 2020-06-09 09:39:13 -07:00
suspend.c PM: hibernate: powerpc: Expose pfn_is_nosave() prototype 2019-06-14 10:48:56 +02:00
swsusp_32.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
swsusp_64.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 2019-06-19 17:11:22 +02:00
swsusp_asm64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 505 2019-06-19 17:11:22 +02:00
swsusp_booke.S
swsusp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
sys_ppc32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
syscall_64.c powerpc/book3s64/pkeys: Optimize KUAP and KUEP feature disabled case 2020-12-04 01:01:28 +11:00
syscalls.c y2038: syscalls: change remaining timeval to __kernel_old_timeval 2019-11-15 14:38:29 +01:00
sysfs.c powerpc/sysfs: Remove unused 'err' variable in sysfs_create_dscr_default() 2020-09-18 20:05:24 +10:00
systbl_chk.sh treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
systbl.S powerpc/64/sycall: Implement syscall entry/exit logic in C 2020-04-01 13:42:13 +11:00
tau_6xx.c powerpc/tau: Disable TAU between measurements 2020-09-15 22:13:30 +10:00
time.c powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
tm.S powerpc/tm: Save and restore AMR on treclaim and trechkpt 2020-10-06 23:22:25 +11:00
traps.c powerpc: Retire e200 core (mpc555x processor) 2020-12-05 21:49:18 +11:00
ucall.S powerpc/kernel: Add ucall_norets() ultravisor call handler 2019-08-30 09:40:15 +10:00
udbg_16550.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
udbg.c powerpc/udbg: Make it safe to call udbg_printf() always 2019-10-11 19:33:25 +11:00
uprobes.c powerpc: fix -Wimplicit-fallthrough 2020-11-18 14:18:09 -06:00
vdso.c powerpc/vdso: Remove DBG() 2020-12-04 01:01:19 +11:00
vecemu.c powerpc: Define and use get_user_instr() et. al. 2020-05-19 00:10:37 +10:00
vector.S powerpc: re-initialise lazy FPU/VEC counters on every fault 2020-07-16 13:00:24 +10:00
vmlinux.lds.S powerpc/64s: fix scv entry fallback flush vs interrupt 2021-01-20 15:58:19 +11:00
watchdog.c