在 2025/10/17 下午2:45, Bibo Mao 写道:
On LoongArch Virt Machine, MMIO region with GPEX host bridge is 0x40000000 -- 0x7FFFFFFF. The total size is 1G bytes and it is enough for emulated virtio devices basically.However on some conditions such as hostmem is added with virtio-gpu device with -device virtio-gpu-gl,hostmem=4G. The PCIE MMIO region is not enough, 64-bit high MMIO region is required. Like other architectures, here property highmem-mmio is added on virt machine to add 64-bit high MMIO region supported. With high MMIO region added, it is not compatible with old machine, so property highmem-mmio is disabled by default. --- v2 ... v3: 1. Fix high MMIO space access failure with UEFI BIOS on TCG mode, since there is 1:1 identified mapping with UEFI bios, virtual address space is 47 bit actually with PGDL root page table, where fail to setup mapping table for 48 bit physical address. Here set physical address width smaller than virtual address width. v1 ... v2: 1. Solve some code conflict and refresh the patch on the latest version. 2. Base address of GPEX high MMIO starts from end of max physical address region rather than adjacent with DRAM, since it is fixed with the previous method. --- Bibo Mao (7): hw/loongarch/virt: Add field ram_end in LoongArchVirtMachineState hw/loongarch/virt: Add field gpex in LoongArchVirtMachineState hw/loongarch/virt: Get irq number from gpex config info hw/loongarch/virt: Get PCI info from gpex config info hw/loongarch/virt: Add property highmem_mmio with virt machine hw/loongarch/virt: Add high MMIO support with GPEX host hw/loongarch/virt: Add property highmem-mmio-size with virt machine hw/loongarch/virt-acpi-build.c | 17 +--- hw/loongarch/virt-fdt-build.c | 43 +++++--- hw/loongarch/virt.c | 175 ++++++++++++++++++++++++++++++--- include/hw/loongarch/virt.h | 5 +- 4 files changed, 200 insertions(+), 40 deletions(-) base-commit: 18f6f30b0089b470f3e737637a86dfb81ebd6eae
HI, this series need rebase . Reviewed-by: Song Gao <[email protected]> Thanks. Song Gao
