[RFC PATCH v2 0/2] dma: swiotlb: Centralize default pool sizing

[Aneesh Kumar K.V (Arm)]

Hi,

This series centralizes swiotlb default-pool initialization and sizing.

The first patch replaces the addressing-limit argument with initialization
flags. It also moves the reduced kmalloc-bounce sizing policy into the
swiotlb core.

The second patch centralizes swiotlb sizing for memory-encrypted systems.
It moves the existing x86 guest-sizing policy into the core. Host memory
encryption retains the normal pool size. A shared default pool is not
needed when a restricted DMA pool is present.

SWIOTLB_INIT_CC_SHARED keeps the first patch self-contained. It is removed
by the second patch when the policy moves into the core.

This series is based on the dma-mapping-for-next branch of:
https://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux.git

Aneesh Kumar K.V (Arm) (2):
  dma: swiotlb: Centralize default pool initialization and sizing
  dma: swiotlb: Initialize and size shared default pools for memory
    encryption

 arch/arm/mm/init.c                   |   6 +-
 arch/arm64/mm/init.c                 |  14 +---
 arch/loongarch/kernel/setup.c        |   2 +-
 arch/mips/cavium-octeon/dma-octeon.c |   2 +-
 arch/mips/loongson64/dma.c           |   2 +-
 arch/mips/sibyte/common/dma.c        |   2 +-
 arch/powerpc/kernel/dma-swiotlb.c    |   4 +-
 arch/powerpc/mm/mem.c                |  15 +++-
 arch/powerpc/platforms/pseries/svm.c |  10 ---
 arch/powerpc/sysdev/fsl_pci.c        |   1 +
 arch/riscv/mm/init.c                 |  18 +----
 arch/s390/mm/init.c                  |   2 +-
 arch/x86/include/asm/iommu.h         |   2 +
 arch/x86/kernel/amd_gart_64.c        |   1 +
 arch/x86/kernel/pci-dma.c            |  17 +++--
 arch/x86/mm/mem_encrypt.c            |  24 ------
 include/linux/swiotlb.h              |  10 ++-
 kernel/dma/swiotlb.c                 | 110 ++++++++++++++++++++++-----
 18 files changed, 146 insertions(+), 96 deletions(-)

-- 
2.43.0