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HV: debug: support 64bit BAR pci uart with 32bit space

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Currently the HV console does not support PCI UART with 64bit BAR, but in the
case that the BAR is in 64bit and the BAR space is below 4GB (i.e. the high
32bit address of the 64bit BAR is zero), HV should be able to support it.

Tracked-On: #6334

Signed-off-by: Victor Sun <victor.sun@intel.com>
This commit is contained in:
Victor Sun 2021-07-30 10:23:50 +08:00 committed by wenlingz
parent 8cb18fb6fd
commit f5594a0ddc
1 changed files with 3 additions and 1 deletions
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4
hypervisor/debug/uart16550.c
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@ -155,7 +155,9 @@ void uart16550_init(bool early_boot)
uart.reg_width = 1;
pci_pdev_write_cfg(uart.bdf, PCIR_COMMAND, 2U, cmd | PCIM_CMD_PORTEN);
} else {
if ((bar0 & 0xfU) == 0U) { /* 32 bits MMIO Space */
uint32_t bar_hi = pci_pdev_read_cfg(uart.bdf, pci_bar_offset(1), 4U);
if (((bar0 & 0xfU) == 0U) || (((bar0 & 0xfU) == 4U) && (bar_hi == 0U))) {
uart.type = MMIO;
uart.mmio_base_vaddr = hpa2hva_early((bar0 & PCI_BASE_ADDRESS_MEM_MASK));
pci_pdev_write_cfg(uart.bdf, PCIR_COMMAND, 2U, cmd | PCIM_CMD_MEMEN);