[PATCH RESEND 0/2] riscv: iommu: Add shutdown callback for kexec

[Xu Lu <luxu.kernel@bytedance.com>]

After kexec, the newly booted kernel can not initialize iommu driver
successfully as no one resets iommu state before kexec.

This patch series supplies shutdown callback for iommu driver. The shutdown
callback resets necessary registers so that newly booted kernel can pass
riscv_iommu_init_check() after kexec.

Xu Lu (2):
  iommu/riscv: Empty iommu queue before enabling it
  iommu/riscv: Add shutdown function for iommu driver

 drivers/iommu/riscv/iommu-pci.c      |  8 ++++++++
 drivers/iommu/riscv/iommu-platform.c |  6 ++++++
 drivers/iommu/riscv/iommu.c          | 12 ++++++++++--
 drivers/iommu/riscv/iommu.h          |  1 +
 4 files changed, 25 insertions(+), 2 deletions(-)

-- 
2.20.1