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Re: [Qemu-devel] [PATCH 1/2] QEMU: Mask writes to RO bits in the status


From: M. Warner Losh
Subject: Re: [Qemu-devel] [PATCH 1/2] QEMU: Mask writes to RO bits in the status reg of PCI config space
Date: Mon, 26 May 2008 12:33:56 -0600 (MDT)

In message: <address@hidden>
            Amit Shah <address@hidden> writes:
: The Status register in the PCI config space has some read-only bits.
: Any writes to those bits should be masked out.

subvendor and subproduct aren't necessarily read-only.  There are
several devices that allow 'special magic' to enable their writing
(used by the BIOS).

Warner




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