[PATCH 0/2] riscv: iommu: Add shutdown callback for kexec
Xu Lu
luxu.kernel at bytedance.com
Fri Dec 13 03:42:31 PST 2024
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 pmu 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
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