linux/drivers/iommu/amd
Kishon Vijay Abraham I ccc62b8277 iommu/amd: Fix "Guest Virtual APIC Table Root Pointer" configuration in IRTE
commit b9c6ff94e4 ("iommu/amd: Re-factor guest virtual APIC
(de-)activation code") while refactoring guest virtual APIC
activation/de-activation code, stored information for activate/de-activate
in "struct amd_ir_data". It used 32-bit integer data type for storing the
"Guest Virtual APIC Table Root Pointer" (ga_root_ptr), though the
"ga_root_ptr" is actually a 40-bit field in IRTE (Interrupt Remapping
Table Entry).

This causes interrupts from PCIe devices to not reach the guest in the case
of PCIe passthrough with SME (Secure Memory Encryption) enabled as _SME_
bit in the "ga_root_ptr" is lost before writing it to the IRTE.

Fix it by using 64-bit data type for storing the "ga_root_ptr". While at
that also change the data type of "ga_tag" to u32 in order to match
the IOMMU spec.

Fixes: b9c6ff94e4 ("iommu/amd: Re-factor guest virtual APIC (de-)activation code")
Cc: stable@vger.kernel.org # v5.4+
Reported-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Link: https://lore.kernel.org/r/20230405130317.9351-1-kvijayab@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
2023-04-13 11:57:30 +02:00
..
amd_iommu_types.h iommu/amd: Fix "Guest Virtual APIC Table Root Pointer" configuration in IRTE 2023-04-13 11:57:30 +02:00
amd_iommu.h iommu/amd: Clean up bus_set_iommu() 2022-09-07 14:26:12 +02:00
debugfs.c iommu/amd: Move AMD IOMMU driver into subdirectory 2020-06-10 17:46:42 +02:00
init.c iommu/amd: Add a length limitation for the ivrs_acpihid command-line parameter 2023-02-03 11:00:44 +01:00
io_pgtable_v2.c iommu/amd: Initial support for AMD IOMMU v2 page table 2022-09-07 16:12:35 +02:00
io_pgtable.c iommu/amd/io-pgtable: Implement unmap_pages io_pgtable_ops callback 2022-09-07 16:12:33 +02:00
iommu_v2.c iommu/amd: Check return value of mmu_notifier_register() 2022-11-19 11:00:41 +01:00
iommu.c iommu/amd: Set page size bitmap during V2 domain allocation 2023-04-13 11:56:19 +02:00
Kconfig iommu/dma: Clean up Kconfig 2022-09-07 14:46:59 +02:00
Makefile iommu/amd: Initial support for AMD IOMMU v2 page table 2022-09-07 16:12:35 +02:00
quirks.c iommu/amd: Include PCI segment ID when initialize IOMMU 2022-07-07 09:37:51 +02:00