Attachment #214741 for bug #245392

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Lines 905-910 msicap_cfgwrite(struct pci_devinst *pi, int capoff, int offset, Link Here

(-)b/usr.sbin/bhyve/pci_emul.c (+7 lines)
905	uint16_t msgctrl, rwmask, msgdata, mme;	905	uint16_t msgctrl, rwmask, msgdata, mme;
906	uint32_t addrlo;	906	uint32_t addrlo;
907		907
		908	/* Convert a 4-byte write at offset 0 into a 2-byte write at 2 */
		909	if (offset == capoff && bytes == 4) {
		910	offset += 2;
		911	bytes -= 2;
		912	val >>= 16;
		913	}
		914
908	/*	915	/*
909	* If guest is writing to the message control register make sure	916	* If guest is writing to the message control register make sure
910	* we do not overwrite read-only fields.	917	* we do not overwrite read-only fields.

Lines 811-818 passthru_cfgread(struct vmctx ctx, int vcpu, struct pci_devinst pi, Link Here

(-)b/usr.sbin/bhyve/pci_passthru.c (-2 / +2 lines)
811	if (coff == PCIR_COMMAND) {	811	if (coff == PCIR_COMMAND) {
812	if (bytes <= 2)	812	if (bytes <= 2)
813	return (-1);	813	return (-1);
814	*rv = pci_get_cfgdata16(pi, PCIR_COMMAND) << 16 \|	814	*rv = pci_get_cfgdata16(pi, PCIR_COMMAND) \|
815	read_config(&sc->psc_sel, PCIR_STATUS, 2);	815	read_config(&sc->psc_sel, PCIR_STATUS, 2) << 16;
816	return (0);	816	return (0);
817	}	817	}
818		818

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