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-rw-r--r--hw/intc/spapr_xive.c24
-rw-r--r--hw/intc/spapr_xive_kvm.c95
-rw-r--r--hw/intc/xive.c17
-rw-r--r--hw/ppc/spapr_irq.c2
-rw-r--r--include/hw/ppc/spapr_xive.h3
-rw-r--r--include/hw/ppc/xive.h1
6 files changed, 140 insertions, 2 deletions
diff --git a/hw/intc/spapr_xive.c b/hw/intc/spapr_xive.c
index e771db5fd0..0aa5d8a55e 100644
--- a/hw/intc/spapr_xive.c
+++ b/hw/intc/spapr_xive.c
@@ -472,10 +472,34 @@ static const VMStateDescription vmstate_spapr_xive_eas = {
},
};
+static int vmstate_spapr_xive_pre_save(void *opaque)
+{
+ if (kvm_irqchip_in_kernel()) {
+ return kvmppc_xive_pre_save(SPAPR_XIVE(opaque));
+ }
+
+ return 0;
+}
+
+/*
+ * Called by the sPAPR IRQ backend 'post_load' method at the machine
+ * level.
+ */
+int spapr_xive_post_load(SpaprXive *xive, int version_id)
+{
+ if (kvm_irqchip_in_kernel()) {
+ return kvmppc_xive_post_load(xive, version_id);
+ }
+
+ return 0;
+}
+
static const VMStateDescription vmstate_spapr_xive = {
.name = TYPE_SPAPR_XIVE,
.version_id = 1,
.minimum_version_id = 1,
+ .pre_save = vmstate_spapr_xive_pre_save,
+ .post_load = NULL, /* handled at the machine level */
.fields = (VMStateField[]) {
VMSTATE_UINT32_EQUAL(nr_irqs, SpaprXive, NULL),
VMSTATE_STRUCT_VARRAY_POINTER_UINT32(eat, SpaprXive, nr_irqs,
diff --git a/hw/intc/spapr_xive_kvm.c b/hw/intc/spapr_xive_kvm.c
index 735577a6f8..3999e4b7ed 100644
--- a/hw/intc/spapr_xive_kvm.c
+++ b/hw/intc/spapr_xive_kvm.c
@@ -15,6 +15,7 @@
#include "sysemu/cpus.h"
#include "sysemu/kvm.h"
#include "hw/ppc/spapr.h"
+#include "hw/ppc/spapr_cpu_core.h"
#include "hw/ppc/spapr_xive.h"
#include "hw/ppc/xive.h"
#include "kvm_ppc.h"
@@ -60,7 +61,24 @@ static void kvm_cpu_enable(CPUState *cs)
/*
* XIVE Thread Interrupt Management context (KVM)
*/
-static void kvmppc_xive_cpu_get_state(XiveTCTX *tctx, Error **errp)
+
+static void kvmppc_xive_cpu_set_state(XiveTCTX *tctx, Error **errp)
+{
+ uint64_t state[2];
+ int ret;
+
+ /* word0 and word1 of the OS ring. */
+ state[0] = *((uint64_t *) &tctx->regs[TM_QW1_OS]);
+
+ ret = kvm_set_one_reg(tctx->cs, KVM_REG_PPC_VP_STATE, state);
+ if (ret != 0) {
+ error_setg_errno(errp, errno,
+ "XIVE: could not restore KVM state of CPU %ld",
+ kvm_arch_vcpu_id(tctx->cs));
+ }
+}
+
+void kvmppc_xive_cpu_get_state(XiveTCTX *tctx, Error **errp)
{
uint64_t state[2] = { 0 };
int ret;
@@ -534,6 +552,81 @@ void kvmppc_xive_synchronize_state(SpaprXive *xive, Error **errp)
kvmppc_xive_get_queues(xive, errp);
}
+/*
+ * The SpaprXive 'pre_save' method is called by the vmstate handler of
+ * the SpaprXive model, after the XIVE controller is synced in the VM
+ * change handler.
+ */
+int kvmppc_xive_pre_save(SpaprXive *xive)
+{
+ Error *local_err = NULL;
+
+ /* EAT: there is no extra state to query from KVM */
+
+ /* ENDT */
+ kvmppc_xive_get_queues(xive, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * The SpaprXive 'post_load' method is not called by a vmstate
+ * handler. It is called at the sPAPR machine level at the end of the
+ * migration sequence by the sPAPR IRQ backend 'post_load' method,
+ * when all XIVE states have been transferred and loaded.
+ */
+int kvmppc_xive_post_load(SpaprXive *xive, int version_id)
+{
+ Error *local_err = NULL;
+ CPUState *cs;
+ int i;
+
+ /* Restore the ENDT first. The targetting depends on it. */
+ for (i = 0; i < xive->nr_ends; i++) {
+ if (!xive_end_is_valid(&xive->endt[i])) {
+ continue;
+ }
+
+ kvmppc_xive_set_queue_config(xive, SPAPR_XIVE_BLOCK_ID, i,
+ &xive->endt[i], &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+ }
+
+ /* Restore the EAT */
+ for (i = 0; i < xive->nr_irqs; i++) {
+ if (!xive_eas_is_valid(&xive->eat[i])) {
+ continue;
+ }
+
+ kvmppc_xive_set_source_config(xive, i, &xive->eat[i], &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+ }
+
+ /* Restore the thread interrupt contexts */
+ CPU_FOREACH(cs) {
+ PowerPCCPU *cpu = POWERPC_CPU(cs);
+
+ kvmppc_xive_cpu_set_state(spapr_cpu_state(cpu)->tctx, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+ }
+
+ /* The source states will be restored when the machine starts running */
+ return 0;
+}
+
static void *kvmppc_xive_mmap(SpaprXive *xive, int pgoff, size_t len,
Error **errp)
{
diff --git a/hw/intc/xive.c b/hw/intc/xive.c
index 7f1c54a7b5..b5ebb33527 100644
--- a/hw/intc/xive.c
+++ b/hw/intc/xive.c
@@ -582,10 +582,27 @@ static void xive_tctx_unrealize(DeviceState *dev, Error **errp)
qemu_unregister_reset(xive_tctx_reset, dev);
}
+static int vmstate_xive_tctx_pre_save(void *opaque)
+{
+ Error *local_err = NULL;
+
+ if (kvm_irqchip_in_kernel()) {
+ kvmppc_xive_cpu_get_state(XIVE_TCTX(opaque), &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
static const VMStateDescription vmstate_xive_tctx = {
.name = TYPE_XIVE_TCTX,
.version_id = 1,
.minimum_version_id = 1,
+ .pre_save = vmstate_xive_tctx_pre_save,
+ .post_load = NULL, /* handled by the sPAPRxive model */
.fields = (VMStateField[]) {
VMSTATE_BUFFER(regs, XiveTCTX),
VMSTATE_END_OF_LIST()
diff --git a/hw/ppc/spapr_irq.c b/hw/ppc/spapr_irq.c
index 5c4a44855d..8d371523e6 100644
--- a/hw/ppc/spapr_irq.c
+++ b/hw/ppc/spapr_irq.c
@@ -350,7 +350,7 @@ static void spapr_irq_cpu_intc_create_xive(SpaprMachineState *spapr,
static int spapr_irq_post_load_xive(SpaprMachineState *spapr, int version_id)
{
- return 0;
+ return spapr_xive_post_load(spapr->xive, version_id);
}
static void spapr_irq_reset_xive(SpaprMachineState *spapr, Error **errp)
diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
index 734662c12a..04294b0ca2 100644
--- a/include/hw/ppc/spapr_xive.h
+++ b/include/hw/ppc/spapr_xive.h
@@ -55,6 +55,7 @@ typedef struct SpaprXive {
bool spapr_xive_irq_claim(SpaprXive *xive, uint32_t lisn, bool lsi);
bool spapr_xive_irq_free(SpaprXive *xive, uint32_t lisn);
void spapr_xive_pic_print_info(SpaprXive *xive, Monitor *mon);
+int spapr_xive_post_load(SpaprXive *xive, int version_id);
void spapr_xive_hcall_init(SpaprMachineState *spapr);
void spapr_dt_xive(SpaprMachineState *spapr, uint32_t nr_servers, void *fdt,
@@ -83,5 +84,7 @@ void kvmppc_xive_get_queue_config(SpaprXive *xive, uint8_t end_blk,
uint32_t end_idx, XiveEND *end,
Error **errp);
void kvmppc_xive_synchronize_state(SpaprXive *xive, Error **errp);
+int kvmppc_xive_pre_save(SpaprXive *xive);
+int kvmppc_xive_post_load(SpaprXive *xive, int version_id);
#endif /* PPC_SPAPR_XIVE_H */
diff --git a/include/hw/ppc/xive.h b/include/hw/ppc/xive.h
index 78c919c4a5..edb8937f17 100644
--- a/include/hw/ppc/xive.h
+++ b/include/hw/ppc/xive.h
@@ -436,5 +436,6 @@ void kvmppc_xive_source_reset(XiveSource *xsrc, Error **errp);
void kvmppc_xive_source_set_irq(void *opaque, int srcno, int val);
void kvmppc_xive_cpu_connect(XiveTCTX *tctx, Error **errp);
void kvmppc_xive_cpu_synchronize_state(XiveTCTX *tctx, Error **errp);
+void kvmppc_xive_cpu_get_state(XiveTCTX *tctx, Error **errp);
#endif /* PPC_XIVE_H */
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-02 10:51:11 +0000