On 9/11/21 4:35 PM, Sasha Levin wrote: > On Fri, Sep 10, 2021 at 07:48:18AM +0200, Cédric Le Goater wrote: >> On 9/10/21 2:14 AM, Sasha Levin wrote: >>> From: Cédric Le Goater <clg@xxxxxxxx> >>> >>> [ Upstream commit 1753081f2d445f9157550692fcc4221cd3ff0958 ] >>> >>> PCI MSIs now live in an MSI domain but the underlying calls, which >>> will EOI the interrupt in real mode, need an HW IRQ number mapped in >>> the XICS IRQ domain. Grab it there. >>> >>> Signed-off-by: Cédric Le Goater <clg@xxxxxxxx> >>> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> >>> Link: https://lore.kernel.org/r/20210701132750.1475580-31-clg@xxxxxxxx >>> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> >> >> >> Why are we backporting this patch in stable trees ? >> >> It should be fine but to compile, we need a partial backport of commit >> 51be9e51a800 ("KVM: PPC: Book3S HV: XIVE: Fix mapping of passthrough >> interrupts") which exports irq_get_default_host(). > > Or, I can drop it if it makes no sense? Yes I would. It makes sense only with the full patchset, the one reworking PCI MSI support in the PPC pSeries and PowerNV platforms. Thanks, C.
