x86/intel-txt: disable TPR DMA protection once DMA remapping is enabled - #33
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x86/intel-txt: disable TPR DMA protection once DMA remapping is enabled#33accek-itl wants to merge 3 commits into
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Signed-off-by: Szymon Acedański <accek@invisiblethingslab.com>
Type and field names come from upstream ACPICA (actbl1.h). Signed-off-by: Szymon Acedański <accek@invisiblethingslab.com>
The equivalent of disable_pmr(), but for TPR-based DMA protection. We use SINIT-validated copy of the DTPR ACPI table to locate the relevant registers. Specification: Intel TXT DMA Protection Ranges architecture specification (document #633933) https://uefi.org/sites/default/files/resources/633933_Intel_TXT_DMA_Protection_Ranges_rev_0p73.pdf Tested on ASUS NUC16 (Panther Lake, SINIT ACM 1.21.20): without this patch a DRTM boot has no working NVMe/USB/NIC; with it, devices probe at the same time as on a non-DRTM boot. Fixes: 8ed1f73 ("xen/arch/x86: add TPR (TXT Protected Range) DMA protection support") Signed-off-by: Szymon Acedański <accek@invisiblethingslab.com>
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The equivalent of disable_pmr(), but for TPR-based DMA protection.
We use SINIT-validated copy of the DTPR ACPI table to locate
the relevant registers.
Specification:
Intel TXT DMA Protection Ranges architecture specification (document #633933)
https://uefi.org/sites/default/files/resources/633933_Intel_TXT_DMA_Protection_Ranges_rev_0p73.pdf
Tested on ASUS NUC16 (Panther Lake, SINIT ACM 1.21.20): without this
patch a DRTM boot has no working NVMe/USB/NIC; with it, devices probe
at the same time as on a non-DRTM boot.