From: Matthew Rosato <mjrosato@xxxxxxxxxxxxx> The GAIT and all of its entries must be represented by physical addresses as this structure is shared with underlying firmware. We can keep a virtual address of the GAIT origin in order to handle processing in the kernel, but when traversing the entries we must again convert the physical AISB stored in that GAIT entry into a virtual address in order to process it. Note: this currently doesn't fix a real bug, since virtual addresses are indentical to physical ones. Reviewed-by: Pierre Morel <pmorel@xxxxxxxxxxxxx> Acked-by: Nico Boehr <nrb@xxxxxxxxxxxxx> Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx> Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220907155952.87356-1-mjrosato@xxxxxxxxxxxxx Message-Id: <20220907155952.87356-1-mjrosato@xxxxxxxxxxxxx> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx> --- arch/s390/kvm/interrupt.c | 2 +- arch/s390/kvm/pci.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c index b9c944b262c7..ab569faf0df2 100644 --- a/arch/s390/kvm/interrupt.c +++ b/arch/s390/kvm/interrupt.c @@ -3324,7 +3324,7 @@ static void aen_host_forward(unsigned long si) if (gaite->count == 0) return; if (gaite->aisb != 0) - set_bit_inv(gaite->aisbo, (unsigned long *)gaite->aisb); + set_bit_inv(gaite->aisbo, phys_to_virt(gaite->aisb)); kvm = kvm_s390_pci_si_to_kvm(aift, si); if (!kvm) diff --git a/arch/s390/kvm/pci.c b/arch/s390/kvm/pci.c index 3c12637ce08c..90aaba80696a 100644 --- a/arch/s390/kvm/pci.c +++ b/arch/s390/kvm/pci.c @@ -71,7 +71,7 @@ static int zpci_setup_aipb(u8 nisc) rc = -ENOMEM; goto free_sbv; } - aift->gait = (struct zpci_gaite *)page_to_phys(page); + aift->gait = (struct zpci_gaite *)page_to_virt(page); zpci_aipb->aipb.faisb = virt_to_phys(aift->sbv->vector); zpci_aipb->aipb.gait = virt_to_phys(aift->gait); -- 2.37.3
