On physical hardware, some PCI devices are not detectable when
UEFI invokes our InitializeYourself() function. But they
are guaranteed to be available before UEFI invokes our
PreparToBoot() function.
Signed-off-by: Bin Gao <gao...@amazon.com>
---
src/fw/csm.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/src/fw/csm.c b/src/fw/csm.c
index f64bc73..1bd821e 100644
--- a/src/fw/csm.c
+++ b/src/fw/csm.c
@@ -64,7 +64,9 @@ static void
csm_maininit(struct bregs *regs)
{
interface_init();
- pci_probe_devices();
+
+ if (CONFIG_CSM && CONFIG_QEMU_HARDWARE)
+ pci_probe_devices();
csm_compat_table.PnPInstallationCheckSegment = SEG_BIOS;
csm_compat_table.PnPInstallationCheckOffset = get_pnp_offset();
@@ -144,6 +146,13 @@ handle_csm_0002(struct bregs *regs)
return;
}
+ // On physical hardware, some PCI devices are not detectable when
+ // UEFI invokes our InitializeYourself() function. But they
+ // are guaranteed to be available before UEFI invokes our
+ // PreparToBoot() function.
+ if (CONFIG_CSM && !CONFIG_QEMU_HARDWARE)
+ pci_probe_devices();
+
dprintf(3, "PrepareToBoot table %04x:%04x\n", regs->es, regs->bx);
struct e820entry *p = (void *)csm_compat_table.E820Pointer;
--
2.17.1
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