Am 09.12.21 um 21:20 schrieb Matthew Rosato:
On 12/9/21 2:54 PM, Christian Borntraeger wrote:
Am 07.12.21 um 21:57 schrieb Matthew Rosato:
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_insn.h | 12 ++++
arch/s390/kvm/interrupt.c | 17 +++++
arch/s390/kvm/kvm-s390.c | 3 +
arch/s390/kvm/pci.c | 113 +++++++++++++++++++++++++++++++
arch/s390/kvm/pci.h | 42 ++++++++++++
5 files changed, 187 insertions(+)
create mode 100644 arch/s390/kvm/pci.h
diff --git a/arch/s390/include/asm/pci_insn.h b/arch/s390/include/asm/pci_insn.h
index 5331082fa516..e5f57cfe1d45 100644
--- a/arch/s390/include/asm/pci_insn.h
+++ b/arch/s390/include/asm/pci_insn.h
@@ -101,6 +101,7 @@ struct zpci_fib {
/* Set Interruption Controls Operation Controls */
#define SIC_IRQ_MODE_ALL 0
#define SIC_IRQ_MODE_SINGLE 1
+#define SIC_SET_AENI_CONTROLS 2
#define SIC_IRQ_MODE_DIRECT 4
#define SIC_IRQ_MODE_D_ALL 16
#define SIC_IRQ_MODE_D_SINGLE 17
@@ -127,9 +128,20 @@ struct zpci_cdiib {
u64 : 64;
} __packed __aligned(8);
+/* adapter interruption parameters block */
+struct zpci_aipb {
+ u64 faisb;
+ u64 gait;
+ u16 : 13;
+ u16 afi : 3;
+ u32 : 32;
+ u16 faal;
+} __packed __aligned(8);
+
union zpci_sic_iib {
struct zpci_diib diib;
struct zpci_cdiib cdiib;
+ struct zpci_aipb aipb;
};
DECLARE_STATIC_KEY_FALSE(have_mio);
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index f9b872e358c6..4efe0e95a40f 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -32,6 +32,7 @@
#include "kvm-s390.h"
#include "gaccess.h"
#include "trace-s390.h"
+#include "pci.h"
#define PFAULT_INIT 0x0600
#define PFAULT_DONE 0x0680
@@ -3276,8 +3277,16 @@ static struct airq_struct gib_alert_irq = {
void kvm_s390_gib_destroy(void)
{
+ struct zpci_aift *aift;
+
if (!gib)
return;
+ aift = kvm_s390_pci_get_aift();
+ if (aift) {
+ mutex_lock(&aift->lock)
aift is a static variable and later patches seem to access that directly without the wrapper.
Can we get rid of kvm_s390_pci_get_aift?
kvm/interrupt.c must also access it when handling AEN forwarding (next patch)
So maybe just make it non-static and declare it in the header file?
[...]
Can we maybe use designated initializer for the static definition of aift, e.g. something
like
static struct zpci_aift aift = {
.gait_lock = __SPIN_LOCK_UNLOCKED(aift.gait_lock),
.lock = __MUTEX_INITIALIZER(aift.lock),
}
and get rid of the init function? >
Maybe -- I can certainly do the above, but I do add a call to zpci_get_mdd() in the init function (patch 23), so if I want to in patch 23 instead add .mdd = zpci_get_mdd() to this designated initializer I'd have to re-work zpci_get_mdd (patch 12) to return the mdd rather than the CLP LIST PCI return code. We want at least a warning if we're setting a 0 for mdd because the CLP failed for some bizarre reason.
I guess one option would be to move the WARN_ON into the zpci_get_mdd() function itself and then now we can do
So maybe leave this as is.
u32 zpci_get_mdd(void);
Niklas, what do you think?
