On 1/14/22 21:31, Matthew Rosato wrote:
Initial setup for Adapter Event Notification Interpretation for zPCI
passthrough devices. Specifically, allocate a structure for forwarding of
adapter events and pass the address of this structure to firmware.
Signed-off-by: Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
---
arch/s390/include/asm/pci.h | 4 +
arch/s390/include/asm/pci_insn.h | 12 +++
arch/s390/kvm/interrupt.c | 14 +++
arch/s390/kvm/kvm-s390.c | 9 ++
arch/s390/kvm/pci.c | 144 +++++++++++++++++++++++++++++++
arch/s390/kvm/pci.h | 42 +++++++++
arch/s390/pci/pci.c | 6 ++
7 files changed, 231 insertions(+)
create mode 100644 arch/s390/kvm/pci.h
...snip...
new file mode 100644
index 000000000000..b2000ed7b8c3
--- /dev/null
+++ b/arch/s390/kvm/pci.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * s390 kvm PCI passthrough support
+ *
+ * Copyright IBM Corp. 2021
+ *
+ * Author(s): Matthew Rosato <mjrosato@xxxxxxxxxxxxx>
+ */
+
+#ifndef __KVM_S390_PCI_H
+#define __KVM_S390_PCI_H
+
+#include <linux/pci.h>
+#include <linux/mutex.h>
+#include <asm/airq.h>
+#include <asm/kvm_pci.h>
+
+struct zpci_gaite {
+ u32 gisa;
+ u8 gisc;
+ u8 count;
+ u8 reserved;
+ u8 aisbo;
+ u64 aisb;
+};
+
+struct zpci_aift {
+ struct zpci_gaite *gait;
+ struct airq_iv *sbv;
+ struct kvm_zdev **kzdev;
+ spinlock_t gait_lock; /* Protects the gait, used during AEN forward */
+ struct mutex lock; /* Protects the other structures in aift */
To facilitate review and debug, can we please rename the lock aift_lock?
+};
+
+extern struct zpci_aift *aift;
+
...snip...
--
Pierre Morel
IBM Lab Boeblingen
