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linux-stable/arch/powerpc
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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
..
boot powerpc/boot: Fix build failure since GCC 4.9 removal 2021-09-14 08:33:32 -07:00
configs powerpc/configs/microwatt: Enable options for systemd 2021-08-27 00:56:53 +10:00
crypto
include powerpc/32s: Fix kuap_kernel_restore() 2021-10-07 23:34:00 +11:00
kernel powerpc/smp: do not decrement idle task preempt count in CPU offline 2021-10-20 21:38:01 +11:00
kexec powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
kvm KVM: PPC: Book3S HV: Make idle_kvm_start_guest() return 0 if it went to guest 2021-10-16 00:40:03 +11:00
lib powerpc/lib: Add helper to check if offset is within conditional branch range 2021-10-07 18:52:33 +11:00
math-emu powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
mm Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
net powerpc/bpf ppc32: Fix BPF_SUB when imm == 0x80000000 2021-10-07 19:52:59 +11:00
perf powerpc/perf: Fix the check for SIAR value 2021-08-25 22:38:19 +10:00
platforms powerpc/pseries/iommu: Create huge DMA window if no MMIO32 is present 2021-10-25 11:41:15 +11:00
purgatory powerpc/kexec: Don't use .machine ppc64 in trampoline_64.S 2021-04-08 21:17:43 +10:00
sysdev powerpc/xive: Discard disabled interrupts in get_irqchip_state() 2021-10-13 16:38:55 +11:00
tools powerpc/head_check: Fix shellcheck errors 2021-08-17 22:52:02 +10:00
xmon powerpc: Refactor verification of MSR_RI 2021-08-26 21:21:07 +10:00
Kbuild
Kconfig Tracing updates for 5.15: 2021-09-05 11:50:41 -07:00
Kconfig.debug powerpc/ptdump: Convert powerpc to GENERIC_PTDUMP 2021-08-25 13:35:48 +10:00
Makefile powerpc: Add "-z notext" flag to disable diagnostic 2021-08-15 13:49:39 +10:00
Makefile.postlink