D33118.diff
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	diff --git a/usr.sbin/bhyve/pci_emul.c b/usr.sbin/bhyve/pci_emul.c
	--- a/usr.sbin/bhyve/pci_emul.c
	+++ b/usr.sbin/bhyve/pci_emul.c
	@@ -1218,7 +1218,8 @@
	}

	#define BUSIO_ROUNDUP 32
	-#define BUSMEM_ROUNDUP (1024 * 1024)
	+#define BUSMEM32_ROUNDUP (1024 * 1024)
	+#define BUSMEM64_ROUNDUP (512 * 1024 * 1024)

	int
	init_pci(struct vmctx *ctx)
	@@ -1320,14 +1321,14 @@
	pci_emul_iobase = roundup2(pci_emul_iobase, BUSIO_ROUNDUP);
	bi->iolimit = pci_emul_iobase;

	- pci_emul_membase32 += BUSMEM_ROUNDUP;
	+ pci_emul_membase32 += BUSMEM32_ROUNDUP;
	pci_emul_membase32 = roundup2(pci_emul_membase32,
	- BUSMEM_ROUNDUP);
	+ BUSMEM32_ROUNDUP);
	bi->memlimit32 = pci_emul_membase32;

	- pci_emul_membase64 += BUSMEM_ROUNDUP;
	+ pci_emul_membase64 += BUSMEM64_ROUNDUP;
	pci_emul_membase64 = roundup2(pci_emul_membase64,
	- BUSMEM_ROUNDUP);
	+ BUSMEM64_ROUNDUP);
	bi->memlimit64 = pci_emul_membase64;
	}