From 6026fdbdbdf5f30edc906de0ae287e95c1b6892b Mon Sep 17 00:00:00 2001
From: Harsh Prateek Bora <harshpb@linux.ibm.com>
Date: Fri, 8 Mar 2024 16:49:27 +0530
Subject: spapr: nested: register nested-hv api hcalls only for cap-nested-hv
Since cap-nested-hv is an optional capability, it makes sense to register
api specfic hcalls only when respective capability is enabled. This
requires to introduce a new API to unregister hypercalls to maintain
sanity across guest reboot since caps are re-applied across reboots and
re-registeration of hypercalls would hit assert otherwise.
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
hw/ppc/spapr_nested.c | 25 +++++++++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
(limited to 'hw/ppc/spapr_nested.c')
diff --git a/hw/ppc/spapr_nested.c b/hw/ppc/spapr_nested.c
index 121aa96..8e0ee0d 100644
--- a/hw/ppc/spapr_nested.c
+++ b/hw/ppc/spapr_nested.c
@@ -7,6 +7,14 @@
#include "hw/ppc/spapr_cpu_core.h"
#include "hw/ppc/spapr_nested.h"
+void spapr_nested_reset(SpaprMachineState *spapr)
+{
+ if (spapr_get_cap(spapr, SPAPR_CAP_NESTED_KVM_HV)) {
+ spapr_unregister_nested_hv();
+ spapr_register_nested_hv();
+ }
+}
+
#ifdef CONFIG_TCG
#define PRTS_MASK 0x1f
@@ -375,20 +383,33 @@ void spapr_exit_nested(PowerPCCPU *cpu, int excp)
address_space_unmap(CPU(cpu)->as, regs, len, len, true);
}
-void spapr_register_nested(void)
+void spapr_register_nested_hv(void)
{
spapr_register_hypercall(KVMPPC_H_SET_PARTITION_TABLE, h_set_ptbl);
spapr_register_hypercall(KVMPPC_H_ENTER_NESTED, h_enter_nested);
spapr_register_hypercall(KVMPPC_H_TLB_INVALIDATE, h_tlb_invalidate);
spapr_register_hypercall(KVMPPC_H_COPY_TOFROM_GUEST, h_copy_tofrom_guest);
}
+
+void spapr_unregister_nested_hv(void)
+{
+ spapr_unregister_hypercall(KVMPPC_H_SET_PARTITION_TABLE);
+ spapr_unregister_hypercall(KVMPPC_H_ENTER_NESTED);
+ spapr_unregister_hypercall(KVMPPC_H_TLB_INVALIDATE);
+ spapr_unregister_hypercall(KVMPPC_H_COPY_TOFROM_GUEST);
+}
#else
void spapr_exit_nested(PowerPCCPU *cpu, int excp)
{
g_assert_not_reached();
}
-void spapr_register_nested(void)
+void spapr_register_nested_hv(void)
+{
+ /* DO NOTHING */
+}
+
+void spapr_unregister_nested_hv(void)
{
/* DO NOTHING */
}
--
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