Hi Robert, On Fri, 5 Apr 2024 10:28:59 +0800, Robert Hoo <robert.hoo.linux@xxxxxxxxx> wrote: > On 1/27/2024 7:42 AM, Jacob Pan wrote: > > This option will be used to support delivering MSIs as posted > > interrupts. Interrupt remapping is required. > > > > Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> > > --- > > arch/x86/Kconfig | 11 +++++++++++ > > 1 file changed, 11 insertions(+) > > > > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > > index 5edec175b9bf..79f04ee2b91c 100644 > > --- a/arch/x86/Kconfig > > +++ b/arch/x86/Kconfig > > @@ -463,6 +463,17 @@ config X86_X2APIC > > > > If you don't know what to do here, say N. > > > > +config X86_POSTED_MSI > > + bool "Enable MSI and MSI-x delivery by posted interrupts" > > + depends on X86_X2APIC && X86_64 && IRQ_REMAP > > Does posted_msi really depend on x2APIC? PID.NDST encoding supports both > xAPIC and x2APIC. No, posted_msi works with xAPIC as well. I just fixed a bug in NDST xAPIC encoding, will be in v2. I was thinking from the performance advantage of x2APIC. But you are right they are orthogonal. > If posted_msi posts more stringent requirement, I think it deserves an > explanation in this patch's description. > And, X86_X2APIC already depends on IRQ_REMAP, can we just list one of > them here? Will drop X2APIC dependency. Thanks, Jacob
