linux-kernel - [RFC PATCH] KVM: PPC: Enable the kvm_create_max

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Message-Id: <20190718101758.14428-1-thuth@redhat.com>
Date:   Thu, 18 Jul 2019 12:17:58 +0200
From:   Thomas Huth <thuth@...hat.com>
To:     kvm@...r.kernel.org, kvm-ppc@...r.kernel.org,
        Paul Mackerras <paulus@...abs.org>
Cc:     linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Laurent Vivier <lvivier@...hat.com>,
        David Gibson <david@...son.dropbear.id.au>
Subject: [RFC PATCH] KVM: PPC: Enable the kvm_create_max_vcpus selftest on ppc64

The kvm_create_max_vcpus is generic enough so that it works out of the
box on POWER, too. We just have to provide some stubs for linking the
code from kvm_util.c.
Note that you also might have to do "ulimit -n 2500" before running the
test, to avoid that it runs out of file handles for the vCPUs.

Signed-off-by: Thomas Huth <thuth@...hat.com>
---
 RFC since the stubs are a little bit ugly (does someone here like
 to implement them?), and since it's a little bit annoying that
 you have to raise the ulimit for this test in case the kernel provides
 more vCPUs than the default ulimit...

 tools/testing/selftests/kvm/Makefile          |  6 +++
 .../selftests/kvm/lib/powerpc/processor.c     | 37 +++++++++++++++++++
 2 files changed, 43 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/lib/powerpc/processor.c

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index ba7849751989..c92dc78ff74b 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -11,6 +11,8 @@ LIBKVM = lib/assert.c lib/elf.c lib/io.c lib/kvm_util.c lib/ucall.c lib/sparsebi
 LIBKVM_x86_64 = lib/x86_64/processor.c lib/x86_64/vmx.c
 LIBKVM_aarch64 = lib/aarch64/processor.c
 LIBKVM_s390x = lib/s390x/processor.c
+LIBKVM_ppc64 = lib/powerpc/processor.c
+LIBKVM_ppc64le = $(LIBKVM_ppc64)
 
 TEST_GEN_PROGS_x86_64 = x86_64/cr4_cpuid_sync_test
 TEST_GEN_PROGS_x86_64 += x86_64/evmcs_test
@@ -35,6 +37,10 @@ TEST_GEN_PROGS_aarch64 += kvm_create_max_vcpus
 TEST_GEN_PROGS_s390x += s390x/sync_regs_test
 TEST_GEN_PROGS_s390x += kvm_create_max_vcpus
 
+TEST_GEN_PROGS_ppc64 += kvm_create_max_vcpus
+
+TEST_GEN_PROGS_ppc64le = $(TEST_GEN_PROGS_ppc64)
+
 TEST_GEN_PROGS += $(TEST_GEN_PROGS_$(UNAME_M))
 LIBKVM += $(LIBKVM_$(UNAME_M))
 
diff --git a/tools/testing/selftests/kvm/lib/powerpc/processor.c b/tools/testing/selftests/kvm/lib/powerpc/processor.c
new file mode 100644
index 000000000000..c0b7f06e206e
--- /dev/null
+++ b/tools/testing/selftests/kvm/lib/powerpc/processor.c
@@ -0,0 +1,37 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * KVM selftest s390x library code - CPU-related functions
+ */
+
+#define _GNU_SOURCE
+
+#include "kvm_util.h"
+#include "../kvm_util_internal.h"
+
+void virt_pgd_alloc(struct kvm_vm *vm, uint32_t memslot)
+{
+	abort();	/* TODO: implement this */
+}
+
+void virt_pg_map(struct kvm_vm *vm, uint64_t gva, uint64_t gpa,
+		 uint32_t memslot)
+{
+	abort();	/* TODO: implement this */
+}
+
+vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva)
+{
+	abort();	/* TODO: implement this */
+
+	return -1;
+}
+
+void virt_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent)
+{
+	abort();	/* TODO: implement this */
+}
+
+void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, uint8_t indent)
+{
+	abort();	/* TODO: implement this */
+}
-- 
2.21.0