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| author | Tomita Moeko <tomitamoeko@gmail.com> | 2025-03-07 02:01:22 +0800 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2025-03-11 17:01:14 +0100 |
| commit | 5faec6a5e2202d3460b6b0550ec4ad897be3c76f (patch) | |
| tree | 6842dbb897b6b1286bfe869dc075e35df99ed241 /rust/qemu-api | |
| parent | 5aed8b0f0be25d2554f8bd76211e43b51e58f736 (diff) | |
| download | focaccia-qemu-5faec6a5e2202d3460b6b0550ec4ad897be3c76f.tar.gz focaccia-qemu-5faec6a5e2202d3460b6b0550ec4ad897be3c76f.zip | |
vfio/igd: Do not include GTT stolen size in etc/igd-bdsm-size
Though GTT Stolen Memory (GSM) is right below Data Stolen Memory (DSM) in host address space, direct access to GSM is prohibited, and it is not mapped to guest address space. Both host and guest accesses GSM indirectly through the second half of MMIO BAR0 (GTTMMADR). Guest firmware only need to reserve a memory region for DSM and program the BDSM register with the base address of that region, that's actually what both SeaBIOS[1] and IgdAssignmentDxe does now. [1] https://gitlab.com/qemu-project/seabios/-/blob/1.12-stable/src/fw/pciinit.c#L319-332 Signed-off-by: Tomita Moeko <tomitamoeko@gmail.com> Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Tested-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Corvin Köhne <c.koehne@beckhoff.com> Link: https://lore.kernel.org/qemu-devel/20250306180131.32970-3-tomitamoeko@gmail.com Signed-off-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'rust/qemu-api')
0 files changed, 0 insertions, 0 deletions