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[PATCH v2 07/14] spapr: nested: Introduce H_GUEST_[CREATE|DELETE] hcalls
From: |
Harsh Prateek Bora |
Subject: |
[PATCH v2 07/14] spapr: nested: Introduce H_GUEST_[CREATE|DELETE] hcalls. |
Date: |
Thu, 12 Oct 2023 16:19:44 +0530 |
Introduce the nested PAPR hcalls:
- H_GUEST_CREATE which is used to create and allocate resources for
nested guest being created.
- H_GUEST_DELETE which is used to delete and deallocate resources
for the nested guest being deleted. It also supports deleting all nested
guests at once using a deleteAll flag.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
---
hw/ppc/spapr_nested.c | 101 ++++++++++++++++++++++++++++++++++
include/hw/ppc/spapr.h | 4 +-
include/hw/ppc/spapr_nested.h | 7 +++
3 files changed, 111 insertions(+), 1 deletion(-)
diff --git a/hw/ppc/spapr_nested.c b/hw/ppc/spapr_nested.c
index c53b310f82..e95e70e20c 100644
--- a/hw/ppc/spapr_nested.c
+++ b/hw/ppc/spapr_nested.c
@@ -477,6 +477,105 @@ static target_ulong h_guest_set_capabilities(PowerPCCPU
*cpu,
}
}
+static void
+destroy_guest_helper(gpointer value)
+{
+ struct SpaprMachineStateNestedGuest *guest = value;
+ g_free(guest);
+}
+
+static target_ulong h_guest_create(PowerPCCPU *cpu,
+ SpaprMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ CPUPPCState *env = &cpu->env;
+ target_ulong flags = args[0];
+ target_ulong continue_token = args[1];
+ uint64_t guestid;
+ int nguests = 0;
+ struct SpaprMachineStateNestedGuest *guest;
+
+ if (flags) { /* don't handle any flags for now */
+ return H_UNSUPPORTED_FLAG;
+ }
+
+ if (continue_token != -1) {
+ return H_P2;
+ }
+
+ if (!spapr->nested.capabilities_set) {
+ return H_STATE;
+ }
+
+ if (!spapr->nested.guests) {
+ spapr->nested.guests = g_hash_table_new_full(NULL,
+ NULL,
+ NULL,
+ destroy_guest_helper);
+ }
+
+ nguests = g_hash_table_size(spapr->nested.guests);
+
+ if (nguests == PAPR_NESTED_GUEST_MAX) {
+ return H_NO_MEM;
+ }
+
+ /* Lookup for available guestid */
+ for (guestid = 1; guestid < PAPR_NESTED_GUEST_MAX; guestid++) {
+ if (!(g_hash_table_lookup(spapr->nested.guests,
+ GINT_TO_POINTER(guestid)))) {
+ break;
+ }
+ }
+
+ if (guestid == PAPR_NESTED_GUEST_MAX) {
+ return H_NO_MEM;
+ }
+
+ guest = g_try_new0(struct SpaprMachineStateNestedGuest, 1);
+ if (!guest) {
+ return H_NO_MEM;
+ }
+
+ guest->pvr_logical = spapr->nested.pvr_base;
+ g_hash_table_insert(spapr->nested.guests, GINT_TO_POINTER(guestid), guest);
+ env->gpr[4] = guestid;
+
+ return H_SUCCESS;
+}
+
+static target_ulong h_guest_delete(PowerPCCPU *cpu,
+ SpaprMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+ target_ulong guestid = args[1];
+ struct SpaprMachineStateNestedGuest *guest;
+
+ /*
+ * handle flag deleteAllGuests, if set:
+ * guestid is ignored and all guests are deleted
+ *
+ */
+ if (flags & ~H_GUEST_DELETE_ALL_FLAG) {
+ return H_UNSUPPORTED_FLAG; /* other flag bits reserved */
+ } else if (flags & H_GUEST_DELETE_ALL_FLAG) {
+ g_hash_table_destroy(spapr->nested.guests);
+ return H_SUCCESS;
+ }
+
+ guest = g_hash_table_lookup(spapr->nested.guests,
GINT_TO_POINTER(guestid));
+ if (!guest) {
+ return H_P2;
+ }
+
+ g_hash_table_remove(spapr->nested.guests, GINT_TO_POINTER(guestid));
+
+ return H_SUCCESS;
+}
+
void spapr_register_nested(void)
{
spapr_register_hypercall(KVMPPC_H_SET_PARTITION_TABLE, h_set_ptbl);
@@ -490,6 +589,8 @@ void spapr_register_nested_papr(void)
/* register hcalls here */
spapr_register_hypercall(H_GUEST_GET_CAPABILITIES,
h_guest_get_capabilities);
spapr_register_hypercall(H_GUEST_SET_CAPABILITIES,
h_guest_set_capabilities);
+ spapr_register_hypercall(H_GUEST_CREATE , h_guest_create);
+ spapr_register_hypercall(H_GUEST_DELETE , h_guest_delete);
}
#else
void spapr_exit_nested(PowerPCCPU *cpu, int excp)
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index c83dd76a84..fcc6f0a3d9 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -588,8 +588,10 @@ struct SpaprMachineState {
#define H_WATCHDOG 0x45C
#define H_GUEST_GET_CAPABILITIES 0x460
#define H_GUEST_SET_CAPABILITIES 0x464
+#define H_GUEST_CREATE 0x470
+#define H_GUEST_DELETE 0x488
-#define MAX_HCALL_OPCODE H_GUEST_SET_CAPABILITIES
+#define MAX_HCALL_OPCODE H_GUEST_DELETE
/* The hcalls above are standardized in PAPR and implemented by pHyp
* as well.
diff --git a/include/hw/ppc/spapr_nested.h b/include/hw/ppc/spapr_nested.h
index b7586d06a4..f186005f00 100644
--- a/include/hw/ppc/spapr_nested.h
+++ b/include/hw/ppc/spapr_nested.h
@@ -11,8 +11,13 @@ typedef struct SpaprMachineStateNested {
#define NESTED_API_PAPR 2
bool capabilities_set;
uint32_t pvr_base;
+ GHashTable *guests;
} SpaprMachineStateNested;
+typedef struct SpaprMachineStateNestedGuest {
+ uint32_t pvr_logical;
+} SpaprMachineStateNestedGuest;
+
/* Nested PAPR API related macros */
#define H_GUEST_CAPABILITIES_COPY_MEM 0x8000000000000000
#define H_GUEST_CAPABILITIES_P9_MODE 0x4000000000000000
@@ -20,6 +25,8 @@ typedef struct SpaprMachineStateNested {
#define H_GUEST_CAP_COPY_MEM_BMAP 0
#define H_GUEST_CAP_P9_MODE_BMAP 1
#define H_GUEST_CAP_P10_MODE_BMAP 2
+#define PAPR_NESTED_GUEST_MAX 4096
+#define H_GUEST_DELETE_ALL_FLAG 0x8000000000000000ULL
/*
* Register state for entering a nested guest with H_ENTER_NESTED.
--
2.39.3
- [PATCH v2 04/14] spapr: nested: Introduce cap-nested-papr for Nested PAPR API, (continued)
- [PATCH v2 04/14] spapr: nested: Introduce cap-nested-papr for Nested PAPR API, Harsh Prateek Bora, 2023/10/12
- [PATCH v2 03/14] spapr: nested: Document Nested PAPR API, Harsh Prateek Bora, 2023/10/12
- [PATCH v2 06/14] spapr: nested: Introduce H_GUEST_[GET|SET]_CAPABILITIES hcalls., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 02/14] spapr: nested: Introduce SpaprMachineStateNested to store related info., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 08/14] spapr: nested: Introduce H_GUEST_CREATE_VPCU hcall., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 09/14] spapr: nested: Initialize the GSB elements lookup table., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 05/14] spapr: nested: register nested-hv api hcalls only for cap-nested-hv, Harsh Prateek Bora, 2023/10/12
- [PATCH v2 11/14] spapr: nested: Use correct source for parttbl info for nested PAPR API., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 13/14] spapr: nested: keep nested-hv exit code restricted to its API., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 10/14] spapr: nested: Introduce H_GUEST_[GET|SET]_STATE hcalls., Harsh Prateek Bora, 2023/10/12
- [PATCH v2 07/14] spapr: nested: Introduce H_GUEST_[CREATE|DELETE] hcalls.,
Harsh Prateek Bora <=
- [PATCH v2 12/14] spapr: nested: rename nested_host_state to nested_hv_host, Harsh Prateek Bora, 2023/10/12
- [PATCH v2 14/14] spapr: nested: Introduce H_GUEST_RUN_VCPU hcall., Harsh Prateek Bora, 2023/10/12