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c73049389e58c01e2e3bbfae900c8daeee177191
linux/arch/powerpc/kernel
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Christophe Leroy c73049389e powerpc/vdso: Fix VDSO data access when running in a non-root time namespace 
When running in a non-root time namespace, the global VDSO data page
is replaced by a dedicated namespace data page and the global data
page is mapped next to it. Detailed explanations can be found at
commit 660fd04f93 ("lib/vdso: Prepare for time namespace support").

When it happens, __kernel_get_syscall_map and __kernel_get_tbfreq
and __kernel_sync_dicache don't work anymore because they read 0
instead of the data they need.

To address that, clock_mode has to be read. When it is set to
VDSO_CLOCKMODE_TIMENS, it means it is a dedicated namespace data page
and the global data is located on the following page.

Add a macro called get_realdatapage which reads clock_mode and add
PAGE_SIZE to the pointer provided by get_datapage macro when
clock_mode is equal to VDSO_CLOCKMODE_TIMENS. Use this new macro
instead of get_datapage macro except for time functions as they handle
it internally.

Fixes: 74205b3fc2 ("powerpc/vdso: Add support for time namespaces")
Reported-by: Jason A. Donenfeld <Jason@zx2c4.com>
Closes: https://lore.kernel.org/all/ZtnYqZI-nrsNslwy@zx2c4.com/
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
2024-09-13 17:28:36 +02:00
..
ptrace
powerpc: Fix typos
2024-05-08 00:21:30 +10:00
syscalls
powerpc: restore some missing spu syscalls
2024-06-25 15:57:26 +02:00
trace
powerpc/ftrace: Ignore ftrace locations in exit text sections
2024-02-14 14:24:06 +11:00
vdso
powerpc/vdso: Fix VDSO data access when running in a non-root time namespace
2024-09-13 17:28:36 +02:00
.gitignore
…
85xx_entry_mapping.S
powerpc: Remove CONFIG_FSL_BOOKE
2022-09-26 22:47:37 +10:00
align.c
…
asm-offsets.c
powerpc/vdso: Fix VDSO data access when running in a non-root time namespace
2024-09-13 17:28:36 +02:00
audit_32.h
powerpc: address missing-prototypes warnings
2023-08-02 22:22:19 +10:00
audit.c
powerpc: address missing-prototypes warnings
2023-08-02 22:22:19 +10:00
btext.c
powerpc: Use shared font data
2023-10-01 23:09:02 +11:00
cacheinfo.c
powerpc: Remove asm/prom.h from all files that don't need it
2022-05-08 22:15:04 +10:00
cacheinfo.h
…
compat_audit.c
powerpc: address missing-prototypes warnings
2023-08-02 22:22:19 +10:00
cpu_setup_6xx.S
powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX
2024-05-08 00:25:00 +10:00
cpu_setup_44x.S
…
cpu_setup_e500.S
powerpc/32: Fix objtool unannotated intra-function call warnings
2022-11-18 19:00:06 +11:00
cpu_setup_pa6t.S
…
cpu_setup_power.c
powerpc/dexcr: Add initial Dynamic Execution Control Register (DEXCR) support
2023-06-19 17:36:25 +10:00
cpu_setup_ppc970.S
…
cpu_specs_8xx.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_44x.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_47x.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_85xx.h
powerpc/cputable: Split cpu_specs[] for mpc85xx and e500mc
2022-09-26 23:00:05 +10:00
cpu_specs_book3s_32.h
powerpc/cputable: Split cpu_specs[] out of cputable.h
2022-09-26 22:47:13 +10:00
cpu_specs_book3s_64.h
powerpc: Add Power11 architected and raw mode
2024-02-21 23:11:00 +11:00
cpu_specs_e500mc.h
powerpc/cputable: Add missing PPC_FEATURE_BOOKE on PPC64 Book-E
2024-02-14 14:24:06 +11:00
cpu_specs.h
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
cputable.c
powerpc: Make cpu_spec __ro_after_init
2023-11-27 22:01:14 +11:00
crash_dump.c
powerpc/fadump: make is_kdump_kernel() return false when fadump is active
2023-09-18 12:23:27 +10:00
dawr.c
powerpc: Include asm/firmware.h in all users of firmware_has_feature()
2022-06-29 16:45:05 +10:00
dbell.c
powerpc/64: Fix perf profiling asynchronous interrupt handlers
2023-01-30 20:07:42 +11:00
dexcr.c
powerpc/dexcr: Add DEXCR prctl interface
2024-05-06 22:04:31 +10:00
dma-iommu.c
change alloc_pages name in dma_map_ops to avoid name conflicts
2024-04-25 20:55:53 -07:00
dma-mask.c
dma-mapping: move arch_dma_set_mask() declaration to header
2023-07-31 17:54:28 +02:00
dma-swiotlb.c
swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction
2022-04-18 07:21:12 +02:00
dt_cpu_ftrs.c
powerpc: Add Power11 architected and raw mode
2024-02-21 23:11:00 +11:00
early_32.c
powerpc: Move C prototypes out of asm-prototypes.h
2022-03-08 22:06:25 +11:00
eeh_cache.c
…
eeh_driver.c
powerpc/eeh: Permanently disable the removed device
2024-04-29 23:51:15 +10:00
eeh_event.c
powerpc: fix typos in comments
2022-05-05 22:12:44 +10:00
eeh_pe.c
powerpc/eeh: avoid possible crash when edev->pdev changes
2024-06-23 11:54:27 +10:00
eeh_sysfs.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
eeh.c
powerpc/iommu: Move dev_has_iommu_table() to iommu.c
2024-06-28 17:03:40 +10:00
entry_32.S
powerpc: Replace CONFIG_4xx with CONFIG_44x
2024-06-28 22:28:48 +10:00
epapr_hcalls.S
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
epapr_paravirt.c
…
exceptions-64e.S
powerpc/64e: drop unused TLB miss handlers
2024-07-12 15:52:15 -07:00
exceptions-64s.S
docs: move powerpc under arch
2023-10-10 13:35:55 -06:00
fadump.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
firmware.c
powerpc: Export kvm_guest static key, for bcachefs six locks
2024-01-01 11:47:38 -05:00
fpu.S
powerpc: Don't clobber f0/vs0 during fp|altivec register save
2023-11-28 23:04:43 +11:00
head_8xx.S
powerpc/8xx: rework support for 8M pages using contiguous PTE entries
2024-07-12 15:52:17 -07:00
head_32.h
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
head_44x.S
powerpc/44x: Introduce _PAGE_READ and remove _PAGE_USER
2023-10-19 17:12:46 +11:00
head_64.S
powerpc/64s: Fix unnecessary copy to 0 when kernel is booted at address 0
2024-06-23 11:54:13 +10:00
head_85xx.S
powerpc/e500: use contiguous PMD instead of hugepd
2024-07-12 15:52:18 -07:00
head_book3s_32.S
powerpc: use CONFIG_EXECMEM instead of CONFIG_MODULES where appropriate
2024-05-14 00:31:44 -07:00
head_booke.h
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
hw_breakpoint_constraints.c
powerpc/watchpoint: Disable pagefaults when getting user instruction
2023-09-18 12:23:47 +10:00
hw_breakpoint.c
powerpc/watchpoints: Annotate atomic context in more places
2023-09-18 12:23:47 +10:00
idle_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2021-12-23 22:35:13 +11:00
idle_64e.S
powerpc: add ISA v3.0 / v3.1 wait opcode macro
2022-09-28 19:22:10 +10:00
idle_85xx.S
powerpc: Cleanup idle for e500
2022-09-26 23:00:14 +10:00
idle_book3s.S
…
idle.c
powerpc: Remove now superfluous sentinel element from ctl_table arrays
2023-10-10 15:22:02 -07:00
ima_arch.c
integrity: Always reference the blacklist keyring with appraisal
2023-08-01 08:17:25 -04:00
interrupt_64.S
powerpc/64: Set task pt_regs->link to the LR value on scv entry
2024-02-05 22:43:19 +11:00
interrupt.c
rseq: Split out rseq.h from sched.h
2023-12-27 11:49:56 -05:00
io-workarounds.c
…
io.c
powerpc: Cast away __iomem in low level IO routines
2023-10-19 17:16:20 +11:00
iomap.c
…
iommu.c
powerpc/iommu: Reimplement the iommu_table_group_ops for pSeries
2024-06-28 17:03:40 +10:00
irq_64.c
work around gcc bugs with 'asm goto' with outputs
2024-02-09 15:57:48 -08:00
irq.c
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
isa-bridge.c
mm: Introduce vmap_page_range() to map pages in PCI address space
2024-03-11 16:58:10 +01:00
jump_label.c
…
kdebugfs.c
…
kgdb.c
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
kprobes-ftrace.c
kprobe/ftrace: bail out if ftrace was killed
2024-05-16 07:23:30 +09:00
kprobes.c
powerpc: extend execmem_params for kprobes allocations
2024-05-14 00:31:43 -07:00
kvm_emul.S
…
kvm.c
powerpc: Remove CONFIG_PPC_BOOK3E_MMU
2022-09-26 23:00:14 +10:00
l2cr_6xx.S
powerpc/mm: Switch obsolete dssall to .long
2021-12-23 22:35:13 +11:00
legacy_serial.c
powerpc: Explicitly include correct DT includes
2023-08-02 22:22:19 +10:00
Makefile
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
mce_power.c
…
mce.c
powerpc/mce: log the error for all unrecoverable errors
2023-02-10 22:17:34 +11:00
misc_32.S
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
misc_64.S
powerpc: Fix typos
2024-05-08 00:21:30 +10:00
misc.S
powerpc: replace #include <asm/export.h> with #include <linux/export.h>
2023-08-16 23:54:48 +10:00
module_32.c
module: replace module_layout with module_memory
2023-03-09 12:55:15 -08:00
module_64.c
powerpc/ftrace: Add support for -fpatchable-function-entry
2023-08-22 00:09:06 +10:00
module.c
Merge tag 'powerpc-6.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2024-05-17 09:05:46 -07:00
msi.c
…
note.S
…
nvram_64.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
of_platform.c
powerpc: Explicitly include correct DT includes
2023-08-02 22:22:19 +10:00
optprobes_head.S
powerpc: add definition for pt_regs offset within an interrupt frame
2022-12-02 17:54:08 +11:00
optprobes.c
powerpc/kprobes: Have optimized_callback() use preempt_enable()
2022-11-24 23:31:49 +11:00
paca.c
docs: move powerpc under arch
2023-10-10 13:35:55 -06:00
pci_32.c
powerpc/pci: Add option for using pci_to_OF_bus_map
2023-02-07 20:15:23 +11:00
pci_64.c
powerpc/pci_64: Init pcibios subsys a bit later
2023-03-14 23:36:27 +11:00
pci_dn.c
powerpc/pci_dn: Add missing of_node_put()
2022-09-05 17:30:25 +10:00
pci_of_scan.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
pci-common.c
arch: Rename fbdev header and source files
2024-05-03 17:07:50 +02:00
pci-hotplug.c
powerpc/pci: Hotplug driver bridge support
2024-07-04 23:10:40 +10:00
pmc.c
powerpc/85xx: Mark some functions static and add missing includes to fix no previous prototype error
2023-08-23 15:55:21 +10:00
ppc_save_regs.S
powerpc: update ppc_save_regs to save current r1 in pt_regs
2023-06-19 17:37:14 +10:00
proc_powerpc.c
powerpc: Add missing headers
2022-05-08 22:15:40 +10:00
process.c
powerpc: Replace CONFIG_4xx with CONFIG_44x
2024-06-28 22:28:48 +10:00
prom_entry_64.S
powerpc/64: Rename entry_64.S to prom_entry_64.S
2023-06-15 14:04:19 +10:00
prom_init_check.sh
kasan, powerpc: don't rename memintrinsics if compiler adds prefixes
2023-03-23 17:18:33 -07:00
prom_init.c
powerpc/mm: Align memory_limit value specified using mem= kernel parameter
2024-04-19 16:09:14 +10:00
prom_parse.c
…
prom.c
powerpc/prom: Add CPU info to hardware description string later
2024-06-28 22:31:00 +10:00
reloc_32.S
…
reloc_64.S
powerpc/64: avoid using r13 in relocate
2022-09-28 19:22:13 +10:00
rtas_entry.S
powerpc/rtas: Fix RTAS MSR[HV] handling for Cell
2022-08-26 08:41:54 +10:00
rtas_flash.c
powerpc: add missing MODULE_DESCRIPTION() macros
2024-07-04 22:39:20 +10:00
rtas_pci.c
powerpc/rtas_pci: rename and properly expose config access APIs
2023-11-28 21:49:45 +11:00
rtas-proc.c
powerpc/rtas: Fix ppc_rtas_rmo_buf_show() kernel-doc
2023-11-07 13:13:45 +11:00
rtas-rtc.c
powerpc/rtas: arch-wide function token lookup conversions
2023-02-13 22:35:03 +11:00
rtas.c
powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas()
2024-06-28 22:28:58 +10:00
rtasd.c
powerpc/rtas: arch-wide function token lookup conversions
2023-02-13 22:35:03 +11:00
secure_boot.c
powerpc: Stop using of_root
2024-03-03 22:20:29 +11:00
security.c
powerpc/security: Fix Speculation_Store_Bypass reporting on Power10
2023-07-10 09:47:47 +10:00
secvar-ops.c
powerpc/secvar: Warn and error if multiple secvar ops are set
2023-02-12 22:12:36 +11:00
secvar-sysfs.c
powerpc/secvar: Don't print error on ENOENT when reading variables
2023-02-12 22:12:37 +11:00
setup_32.c
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
setup_64.c
powerpc/64e: drop MMU_FTR_TYPE_FSL_E checks in 64-bit code
2024-07-12 15:52:14 -07:00
setup-common.c
powerpc/mm: Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL
2024-08-12 21:50:20 +10:00
setup.h
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
signal_32.c
powerpc/signal32: Force inlining of __unsafe_save_user_regs() and save_tm_user_regs_unsafe()
2023-06-09 23:29:51 +10:00
signal_64.c
powerpc/signal: Update comment for clarity
2022-07-28 16:22:14 +10:00
signal.c
powerpc: Replace GPL 2.0+ README.legal boilerplate with SPDX
2023-09-19 20:05:58 +10:00
signal.h
powerpc: Replace GPL 2.0+ README.legal boilerplate with SPDX
2023-09-19 20:05:58 +10:00
smp-tbsync.c
…
smp.c
powerpc: Fix typos
2024-05-08 00:21:30 +10:00
stacktrace.c
powerpc/stacktrace: Fix arch_stack_walk_reliable()
2023-09-22 20:29:27 +10:00
static_call.c
…
suspend.c
…
switch.S
powerpc: merge 32-bit and 64-bit _switch implementation
2023-06-15 14:03:55 +10:00
swsusp_32.S
powerpc/32: Fix objtool unannotated intra-function call warnings
2022-11-18 19:00:06 +11:00
swsusp_64.c
powerpc/suspend: Add prototype for do_after_copyback()
2023-11-30 13:15:49 +11:00
swsusp_85xx.S
powerpc: Remove CONFIG_FSL_BOOKE
2022-09-26 22:47:37 +10:00
swsusp_asm64.S
powerpc/64: asm use consistent global variable declaration and access
2022-09-28 19:22:12 +10:00
swsusp.c
…
sys_ppc32.c
powerpc/32: fix syscall wrappers with 64-bit arguments
2022-11-01 10:24:09 +11:00
syscall.c
powerpc: Use user_mode() macro when possible
2024-02-22 21:55:33 +11:00
syscalls.c
powerpc: Adopt SYSCALL_DEFINE for arch-specific syscall handlers
2022-09-28 19:22:08 +10:00
sysfs.c
powerpc: Fix typos
2024-05-08 00:21:30 +10:00
systbl.c
powerpc: Don't add __powerpc_ prefix to syscall entry points
2022-10-07 00:59:54 +11:00
tau_6xx.c
powerpc, workqueue: Use alloc_ordered_workqueue() to create ordered workqueues
2023-05-08 13:52:27 -10:00
time.c
powerpc/4xx: Remove CONFIG_BOOKE_OR_40x
2024-06-28 22:28:48 +10:00
tm.S
powerpc: replace #include <asm/export.h> with #include <linux/export.h>
2023-08-16 23:54:48 +10:00
traps.c
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
ucall.S
powerpc: replace #include <asm/export.h> with #include <linux/export.h>
2023-08-16 23:54:48 +10:00
udbg_16550.c
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
udbg.c
powerpc: Remove core support for 40x
2024-06-28 22:28:47 +10:00
uprobes.c
powerpc: Reject probes on instructions that can't be single stepped
2022-05-06 00:00:20 +10:00
vdso32_wrapper.S
powerpc/vdso: Merge vdso64 and vdso32 into a single directory
2022-02-12 22:47:43 +11:00
vdso64_wrapper.S
powerpc/vdso: Merge vdso64 and vdso32 into a single directory
2022-02-12 22:47:43 +11:00
vdso.c
mm: remove zap_page_range and create zap_vma_pages
2023-01-18 17:12:55 -08:00
vecemu.c
…
vector.S
powerpc: Don't clobber f0/vs0 during fp|altivec register save
2023-11-28 23:04:43 +11:00
vmlinux.lds.S
init/modpost: conditionally check section mismatch to __meminit*
2024-07-12 16:39:52 -07:00
watchdog.c
nmi_backtrace: allow excluding an arbitrary CPU
2023-08-18 10:19:00 -07:00