Re: [PATCH v5 1/7] x86/msi: passthrough all MSI-X vector ctrl writes to device model

On Wed, Mar 13, 2024 at 04:16:06PM +0100, Marek Marczykowski-Górecki wrote: > QEMU needs to know whether clearing maskbit of a vector is really > clearing, or was already cleared before. Currently Xen sends only > clearing that bit to the device model, but not setting it, so QEMU > cannot detect

Re: [PATCH v5 1/7] x86/msi: passthrough all MSI-X vector ctrl writes to device model

On 13.03.2024 16:16, Marek Marczykowski-Górecki wrote: > QEMU needs to know whether clearing maskbit of a vector is really > clearing, or was already cleared before. Currently Xen sends only > clearing that bit to the device model, but not setting it, so QEMU > cannot detect it. Because of that,

[PATCH v5 1/7] x86/msi: passthrough all MSI-X vector ctrl writes to device model

QEMU needs to know whether clearing maskbit of a vector is really clearing, or was already cleared before. Currently Xen sends only clearing that bit to the device model, but not setting it, so QEMU cannot detect it. Because of that, QEMU is working this around by checking via /dev/mem, but that