kvm tools: Fixes for mptable module

Fixes include:
 - Error handling
 - Cleanup
 - Standard init/uninit

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>

builtin-run.c

@@ -1201,6 +1201,10 @@ static int kvm_cmd_run_init(int argc, const char **argv)
 	kvm__start_timer(kvm);
 
 	kvm__arch_setup_firmware(kvm);
+	if (r < 0) {
+		pr_err("kvm__arch_setup_firmware() failed with error %d\n", r);
+		goto fail;
+	}
 
 	for (i = 0; i < nrcpus; i++) {
 		kvm_cpus[i] = kvm_cpu__init(kvm, i);
@@ -1270,6 +1274,10 @@ static void kvm_cmd_run_exit(int guest_ret)
 	if (r < 0)
 		pr_warning("serial8250__exit() failed with error %d\n", r);
 
+	r = kvm__arch_free_firmware(kvm);
+	if (r < 0)
+		pr_warning("kvm__arch_free_firmware() failed with error %d\n", r);
+
 	r = ioport__exit(kvm);
 	if (r < 0)
 		pr_warning("ioport__exit() failed with error %d\n", r);

include/kvm/kvm.h

@@ -63,6 +63,7 @@ void kvm__arch_set_cmdline(char *cmdline, bool video);
 void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size);
 void kvm__arch_delete_ram(struct kvm *kvm);
 int kvm__arch_setup_firmware(struct kvm *kvm);
+int kvm__arch_free_firmware(struct kvm *kvm);
 bool kvm__arch_cpu_supports_vm(void);
 void kvm__arch_periodic_poll(struct kvm *kvm);
 

powerpc/kvm.c

@@ -191,3 +191,8 @@ int kvm__arch_setup_firmware(struct kvm *kvm)
 
 	return 0;
 }
+
+int kvm__arch_free_firmware(struct kvm *kvm)
+{
+	return 0;
+}

x86/include/kvm/mptable.h

@@ -3,6 +3,7 @@
 
 struct kvm;
 
-int mptable_setup(struct kvm *kvm, unsigned int ncpus);
+int mptable__init(struct kvm *kvm);
+int mptable__exit(struct kvm *kvm);
 
 #endif /* KVM_MPTABLE_H_ */

x86/kvm.c

@@ -358,13 +358,27 @@ bool load_bzimage(struct kvm *kvm, int fd_kernel,
  */
 int kvm__arch_setup_firmware(struct kvm *kvm)
 {
+	int r;
+
 	/* standart minimal configuration */
 	setup_bios(kvm);
 
 	/* FIXME: SMP, ACPI and friends here */
 
 	/* MP table */
-	return mptable_setup(kvm, kvm->nrcpus);
+	r = mptable__init(kvm);
+
+	return r;
+}
+
+int kvm__arch_free_firmware(struct kvm *kvm)
+{
+	int r;
+
+	/* MP table */
+	r = mptable__exit(kvm);
+
+	return r;
 }
 
 void kvm__arch_periodic_poll(struct kvm *kvm)

x86/mptable.c

@@ -71,7 +71,7 @@ static void mptable_add_irq_src(struct mpc_intsrc *mpc_intsrc,
 /**
  * mptable_setup - create mptable and fill guest memory with it
  */
-int mptable_setup(struct kvm *kvm, unsigned int ncpus)
+int mptable__init(struct kvm *kvm)
 {
 	unsigned long real_mpc_table, real_mpf_intel, size;
 	struct mpf_intel *mpf_intel;
@@ -85,7 +85,7 @@ int mptable_setup(struct kvm *kvm, unsigned int ncpus)
 	const int pcibusid = 0;
 	const int isabusid = 1;
 
-	unsigned int i, nentries = 0;
+	unsigned int i, nentries = 0, ncpus = kvm->nrcpus;
 	unsigned int ioapicid;
 	void *last_addr;
 
@@ -100,7 +100,7 @@ int mptable_setup(struct kvm *kvm, unsigned int ncpus)
 
 	mpc_table = calloc(1, MPTABLE_MAX_SIZE);
 	if (!mpc_table)
-		die("Out of memory");
+		return -ENOMEM;
 
 	MPTABLE_STRNCPY(mpc_table->signature,	MPC_SIGNATURE);
 	MPTABLE_STRNCPY(mpc_table->oem,		MPTABLE_OEM);
@@ -267,7 +267,8 @@ int mptable_setup(struct kvm *kvm, unsigned int ncpus)
 	    size > MPTABLE_MAX_SIZE) {
 		free(mpc_table);
 		pr_err("MP table is too big");
-		return -1;
+
+		return -E2BIG;
 	}
 
 	/*
@@ -276,5 +277,11 @@ int mptable_setup(struct kvm *kvm, unsigned int ncpus)
 	memcpy(guest_flat_to_host(kvm, real_mpc_table), mpc_table, size);
 
 	free(mpc_table);
+
+	return 0;
+}
+
+int mptable__exit(struct kvm *kvm)
+{
 	return 0;
 }