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s390x: always provide pci support

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We tried to make pci support optional on s390x in the past;
unfortunately, we still require the s390 phb to be created
unconditionally due to backwards compatibility issues.

Instead of sinking more effort into this (including compat
handling for older machines etc.) for non-obvious gains, let's
just make CONFIG_PCI something that is always set on s390x.

Note that you can still fence off pci for the _guest_ if you
provide a cpu model without the zpci feature.

Message-Id: <20190211113255.3837-1-cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Cornelia Huck 2019-02-11 12:32:55 +01:00
parent 44699e1c94
commit 09ced81aac
6 changed files with 2 additions and 92 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hw/s390x/Makefile.objs
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@ -21,8 +21,7 @@ obj-$(call land,$(CONFIG_VIRTIO_9P),$(CONFIG_VIRTFS)) += virtio-ccw-9p.o
obj-$(CONFIG_VHOST_VSOCK) += vhost-vsock-ccw.o
obj-y += css-bridge.o
obj-y += ccw-device.o
obj-$(CONFIG_PCI) += s390-pci-bus.o s390-pci-inst.o
obj-$(call lnot,$(CONFIG_PCI)) += s390-pci-stub.o
obj-y += s390-pci-bus.o s390-pci-inst.o
obj-y += s390-skeys.o
obj-y += s390-stattrib.o
obj-y += tod.o

77
hw/s390x/s390-pci-stub.c
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@ -1,77 +0,0 @@
/* stubs for non-pci builds */
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "s390-pci-inst.h"
#include "s390-pci-bus.h"
/* target/s390x/ioinst.c */
int pci_chsc_sei_nt2_get_event(void *res)
{
return 1;
}
int pci_chsc_sei_nt2_have_event(void)
{
return 0;
}
/* hw/s390x/sclp.c */
void s390_pci_sclp_configure(SCCB *sccb)
{
sccb->h.response_code = cpu_to_be16(SCLP_RC_ADAPTER_TYPE_NOT_RECOGNIZED);
}
void s390_pci_sclp_deconfigure(SCCB *sccb)
{
sccb->h.response_code = cpu_to_be16(SCLP_RC_ADAPTER_TYPE_NOT_RECOGNIZED);
}
/* target/s390x/kvm.c */
int clp_service_call(S390CPU *cpu, uint8_t r2)
{
return -1;
}
int pcilg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
{
return -1;
}
int pcistg_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
{
return -1;
}
int stpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar)
{
return -1;
}
int rpcit_service_call(S390CPU *cpu, uint8_t r1, uint8_t r2)
{
return -1;
}
int pcistb_service_call(S390CPU *cpu, uint8_t r1, uint8_t r3, uint64_t gaddr,
uint8_t ar)
{
return -1;
}
int mpcifc_service_call(S390CPU *cpu, uint8_t r1, uint64_t fiba, uint8_t ar)
{
return -1;
}
S390pciState *s390_get_phb(void)
{
return NULL;
}
S390PCIBusDevice *s390_pci_find_dev_by_target(S390pciState *s,
const char *target)
{
return NULL;
}

4
hw/s390x/s390-virtio-ccw.c
View File

@ -272,10 +272,6 @@ static void ccw_init(MachineState *machine)
machine->initrd_filename, "s390-ccw.img",
"s390-netboot.img", true);
/*
* We cannot easily make the pci host bridge conditional as older QEMUs
* always created it. Doing so would break migration across QEMU versions.
*/
dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
OBJECT(dev), NULL);

5
target/s390x/cpu_models.c
View File

@ -1314,11 +1314,6 @@ static void register_types(void)
/* init all bitmaps from gnerated data initially */
s390_init_feat_bitmap(qemu_max_cpu_feat_init, qemu_max_cpu_feat);
#ifndef CONFIG_USER_ONLY
if (!pci_available) {
clear_bit(S390_FEAT_ZPCI, qemu_max_cpu_feat);
}
#endif
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
s390_init_feat_bitmap(s390_cpu_defs[i].base_init,
s390_cpu_defs[i].base_feat);

1
target/s390x/gen-features.c
View File

@ -598,7 +598,6 @@ static uint16_t qemu_MAX[] = {
S390_FEAT_STFLE_53,
/* generates a dependency warning, leave it out for now */
S390_FEAT_MSA_EXT_5,
/* only with CONFIG_PCI */
S390_FEAT_ZPCI,
};

4
target/s390x/kvm.c
View File

@ -2278,9 +2278,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
}
/* We emulate a zPCI bus and AEN, therefore we don't need HW support */
if (pci_available) {
set_bit(S390_FEAT_ZPCI, model->features);
}
set_bit(S390_FEAT_ZPCI, model->features);
set_bit(S390_FEAT_ADAPTER_EVENT_NOTIFICATION, model->features);
if (s390_known_cpu_type(cpu_type)) {