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Fix a bug in how a 64-bit bar in a pci passthru device would be presented to

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the guest. Prior to the fix it was possible for such a bar to appear as a
32-bit bar as long as it was allocated from the region below 4GB.

This had the potential to confuse some drivers that were particular about
the size of the bars.

Obtained from:	NetApp
This commit is contained in:
Neel Natu 2012-08-06 07:20:25 +00:00
parent 99d653892b
commit 25d4944e06
1 changed files with 6 additions and 1 deletions
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7
usr.sbin/bhyve/pci_emul.c
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@ -455,8 +455,13 @@ pci_emul_alloc_bar(struct pci_devinst *pdi, int idx, uint64_t hostbase,
lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64 |
PCIM_BAR_MEM_PREFETCH;
break;
} else {
baseptr = &pci_emul_membase32;
limit = PCI_EMUL_MEMLIMIT32;
mask = PCIM_BAR_MEM_BASE;
lobits = PCIM_BAR_MEM_SPACE | PCIM_BAR_MEM_64;
}
/* fallthrough */
break;
case PCIBAR_MEM32:
baseptr = &pci_emul_membase32;
limit = PCI_EMUL_MEMLIMIT32;