Messages in this thread | | | Date | Thu, 22 Jul 2021 16:46:56 -0500 | From | Bjorn Helgaas <> | Subject | Re: [patch 3/8] PCI/MSI: Enforce that MSI-X table entry is masked for update |
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On Wed, Jul 21, 2021 at 09:11:29PM +0200, Thomas Gleixner wrote: > The specification states:
Maybe add "(PCIe r5.0, sec 6.1.4.5)"
> For MSI-X, a function is permitted to cache Address and Data values > from unmasked MSI-X Table entries. However, anytime software unmasks a > currently masked MSI-X Table entry either by clearing its Mask bit or > by clearing the Function Mask bit, the function must update any Address > or Data values that it cached from that entry. If software changes the > Address or Data value of an entry while the entry is unmasked, the > result is undefined.
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