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s390x/pci: let intercept devices have separate PCI groups

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Let's use the reserved pool of simulated PCI groups to allow intercept
devices to have separate groups from interpreted devices as some group
values may be different. If we run out of simulated PCI groups, subsequent
intercept devices just get the default group.
Furthermore, if we encounter any PCI groups from hostdevs that are marked
as simulated, let's just assign them to the default group to avoid
conflicts between host simulated groups and our own simulated groups.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Message-Id: <20220902172737.170349-7-mjrosato@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Matthew Rosato 2022-09-02 13:27:35 -04:00 • committed by Thomas Huth
parent d0bc7091c2
commit 30dcf4f7fd
3 changed files with 59 additions and 6 deletions
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6
include/hw/s390x/s390-pci-bus.h
View file

@ -315,13 +315,16 @@ typedef struct ZpciFmb {
QEMU_BUILD_BUG_MSG(offsetof(ZpciFmb, fmt0) != 48, "padding in ZpciFmb");
#define ZPCI_DEFAULT_FN_GRP 0xFF
#define ZPCI_SIM_GRP_START 0xF0
typedef struct S390PCIGroup {
ClpRspQueryPciGrp zpci_group;
int id;
int host_id;
QTAILQ_ENTRY(S390PCIGroup) link;
} S390PCIGroup;
S390PCIGroup *s390_group_create(int id);
S390PCIGroup *s390_group_create(int id, int host_id);
S390PCIGroup *s390_group_find(int id);
S390PCIGroup *s390_group_find_host_sim(int host_id);
struct S390PCIBusDevice {
DeviceState qdev;
@ -370,6 +373,7 @@ struct S390pciState {
QTAILQ_HEAD(, S390PCIBusDevice) zpci_devs;
QTAILQ_HEAD(, S390PCIDMACount) zpci_dma_limit;
QTAILQ_HEAD(, S390PCIGroup) zpci_groups;
uint8_t next_sim_grp;
};
S390pciState *s390_get_phb(void);