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d853adc7ad
linux/arch/powerpc/platforms/pseries
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Alexey Kardashevskiy d853adc7ad powerpc/pseries/iommu: Create huge DMA window if no MMIO32 is present 
The iommu_init_table() helper takes an address range to reserve in
the IOMMU table being initialized to exclude MMIO addresses, this is
useful if the window stretches far beyond 4GB (although wastes some TCEs).
At the moment the code searches for such MMIO32 range and fails if none
found which is considered a problem while it really is not: it is actually
better as this says there is no MMIO32 to reserve and we can use
usually wasted TCEs. Furthermore PHYP never actually allows creating
windows starting at busaddress=0 so this MMIO32 range is never useful.

This removes error exit and initializes the table with zero range if
no MMIO32 is detected.

Fixes: 381ceda88c ("powerpc/pseries/iommu: Make use of DDW for indirect mapping")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211020132315.2287178-5-aik@ozlabs.ru
2021-10-25 11:41:15 +11:00
..
cmm.c mm: remove unneeded includes of <asm/pgalloc.h> 2020-08-07 11:33:26 -07:00
dlpar.c powerpc/pseries/dlpar: use rtas_get_sensor() 2021-06-25 14:47:20 +10:00
dtl.c powerpc: rename powerpc_debugfs_root to arch_debugfs_dir 2021-08-13 22:04:26 +10:00
eeh_pseries.c pseries/eeh: Fix the kdump kernel crash during eeh_pseries_init 2021-10-07 23:37:22 +11:00
event_sources.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
firmware.c powerpc/pseries: Add support for FORM2 associativity 2021-08-13 22:04:27 +10:00
hotplug-cpu.c powerpc/pseries: Fix build error when NUMA=n 2021-08-16 14:11:00 +10:00
hotplug-memory.c Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
hvCall_inst.c powerpc/pseries: Make symbol '__pcpu_scope_hcall_stats' static 2021-04-14 23:04:17 +10:00
hvCall.S powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
hvconsole.c powerpc updates for 5.3 2019-07-13 16:08:36 -07:00
hvcserver.c powerpc: Use fallthrough pseudo-keyword 2020-07-29 21:09:37 +10:00
ibmebus.c bus: Make remove callback return void 2021-07-21 11:53:42 +02:00
io_event_irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
iommu.c powerpc/pseries/iommu: Create huge DMA window if no MMIO32 is present 2021-10-25 11:41:15 +11:00
Kconfig powerpc/pseries: Implement paravirt qspinlocks for SPLPAR 2020-07-27 00:01:29 +10:00
kexec.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
lpar.c powerpc/pseries: Add a helper for form1 cpu distance 2021-08-13 22:04:27 +10:00
lparcfg.c powerpc/pseries: export LPAR security flavor in lparcfg 2021-03-26 23:19:41 +11:00
Makefile powerpc/pseries/vas: Integrate API with open/close windows 2021-06-20 21:58:57 +10:00
mobility.c powerpc/pseries/mobility: handle premature return from H_JOIN 2021-03-23 09:25:12 +11:00
msi.c powerpc/pseries/msi: Add an empty irq_write_msi_msg() handler 2021-10-07 23:33:25 +11:00
nvram.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
of_helpers.c powerpc/pseries: Fix of_read_drc_info_cell() to point at next record 2020-03-25 12:06:43 +11:00
of_helpers.h
papr_scm.c powerpc/papr_scm: trivial: fix typo in a comment 2021-06-25 14:47:19 +10:00
pci_dlpar.c powerpc/pseries/pci: Add support of MSI domains to PHB hotplug 2021-08-10 23:14:58 +10:00
pci.c powerpc/powernv: remove the nvlink support 2021-05-02 23:35:32 +10:00
pmem.c powerpc/pseries/pmem: Make symbol 'drc_pmem_match' static 2021-04-14 23:04:17 +10:00
power.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
pseries_energy.c powerpc/pseries: Fix drc-info mappings of logical cpus to drc-index 2019-11-13 16:57:57 +11:00
pseries.h powerpc/pseries/pci: Add support of MSI domains to PHB hotplug 2021-08-10 23:14:58 +10:00
ras.c powerpc: Refactor verification of MSR_RI 2021-08-26 21:21:07 +10:00
reconfig.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
rng.c powerpc/pseries: Fix missing of_node_put() in rng_init() 2020-08-25 01:31:31 +10:00
rtas-fadump.c powerpc/fadump: make symbol 'rtas_fadump_set_regval' static 2021-04-14 23:04:19 +10:00
rtas-fadump.h powerpc/fadump: support holes in kernel boot memory area 2019-09-14 00:04:46 +10:00
scanlog.c proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
setup.c Merge branch 'fixes' into next 2021-09-03 22:54:12 +10:00
smp.c powerpc/preempt: Don't touch the idle task's preempt_count during hotplug 2021-07-08 23:38:10 +10:00
suspend.c powerpc/pseries/hibernation: remove prepare_late() callback 2020-12-08 21:41:02 +11:00
svm.c powerpc/svm: Don't issue ultracalls if !mem_encrypt_active() 2021-07-31 22:28:39 -04:00
vas.c powerpc/pseries/vas: Declare pseries_vas_fault_thread_fn() as static 2021-08-20 22:17:18 +10:00
vas.h powerpc/pseries/vas: Define VAS/NXGZIP hcalls and structs 2021-06-20 21:58:56 +10:00
vio.c dma-mapping updates for Linux 5.15 2021-09-02 10:32:06 -07:00
vphn.c powerpc/vphn: Check for error from hcall_vphn 2020-03-04 22:44:30 +11:00