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(parent: bf27ef8) | patch
x86/kvm: Enable 15-bit extension when KVM_FEATURE_MSI_EXT_DEST_ID detected
authorDavid Woodhouse <dwmw@amazon.co.uk>
Sat, 24 Oct 2020 21:35:35 +0000 (22:35 +0100)
committerThomas Gleixner <tglx@linutronix.de>
Wed, 28 Oct 2020 19:26:33 +0000 (20:26 +0100)
commit2e008ffe426f927b1697adb4ed10c1e419927ae4
treed0a210f326c8a9085f58078ae772f4efef1eaac9tree | snapshot
parentbf27ef8a77d8da38c9f35f8f6aab013a2dcf175fcommit | diff
x86/kvm: Enable 15-bit extension when KVM_FEATURE_MSI_EXT_DEST_ID detected

This allows the host to indicate that MSI emulation supports 15-bit
destination IDs, allowing up to 32768 CPUs without interrupt remapping.

cf. https://patchwork.kernel.org/patch/11816693/ for qemu

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20201024213535.443185-36-dwmw2@infradead.org
arch/x86/kernel/kvm.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git