iommu/exynos: Implement fault handling on SysMMU v7

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SysMMU v7 has a bit different registers for getting the fault info:
  - there is one single register (MMU_FAULT_VA) to get the fault address
  - fault access type (R/W) can be read from MMU_FAULT_TRANS_INFO
    register now
  - interrupt status register has different bits w.r.t. previous SysMMU
    versions
  - VM and non-VM layouts have different register addresses

Add correct fault handling implementation for SysMMU v7, according to
all mentioned differences. Only VID #0 (default) is handled, as VM
domains support is not implemented yet.

Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20220726200739.30017-3-semen.protsenko@linaro.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>

...

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Sam Protsenko 2022-07-26 23:07:39 +03:00 • committed by Joerg Roedel

parent c64074bfe2

commit 2f599c3ff4

1 changed files with 44 additions and 4 deletions

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drivers/iommu/exynos-iommu.c

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