linux-kernel - [V3 PATCH 8/8] KVM: selftests: Add private mem test for SEV VMs

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Date:   Fri, 23 Dec 2022 00:13:52 +0000
From:   Vishal Annapurve <vannapurve@...gle.com>
To:     x86@...nel.org, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     pbonzini@...hat.com, vkuznets@...hat.com, wanpengli@...cent.com,
        jmattson@...gle.com, joro@...tes.org, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, shuah@...nel.org, yang.zhong@...el.com,
        drjones@...hat.com, ricarkol@...gle.com, aaronlewis@...gle.com,
        wei.w.wang@...el.com, kirill.shutemov@...ux.intel.com,
        corbet@....net, hughd@...gle.com, jlayton@...nel.org,
        bfields@...ldses.org, akpm@...ux-foundation.org,
        chao.p.peng@...ux.intel.com, yu.c.zhang@...ux.intel.com,
        jun.nakajima@...el.com, dave.hansen@...el.com,
        michael.roth@....com, qperret@...gle.com, steven.price@....com,
        ak@...ux.intel.com, david@...hat.com, luto@...nel.org,
        vbabka@...e.cz, marcorr@...gle.com, erdemaktas@...gle.com,
        pgonda@...gle.com, nikunj@....com, seanjc@...gle.com,
        diviness@...gle.com, maz@...nel.org, dmatlack@...gle.com,
        axelrasmussen@...gle.com, maciej.szmigiero@...cle.com,
        mizhang@...gle.com, bgardon@...gle.com, ackerleytng@...gle.com,
        Vishal Annapurve <vannapurve@...gle.com>
Subject: [V3 PATCH 8/8] KVM: selftests: Add private mem test for SEV VMs

Add SEV VM specific private mem test to invoke selftest logic similar
to the one executed for non-confidential VMs.

Signed-off-by: Vishal Annapurve <vannapurve@...gle.com>
---
 tools/testing/selftests/kvm/.gitignore        |  1 +
 tools/testing/selftests/kvm/Makefile          |  1 +
 .../kvm/x86_64/sev_private_mem_test.c         | 26 +++++++++++++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 tools/testing/selftests/kvm/x86_64/sev_private_mem_test.c

diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore
index f73639dcbebb..e5c82a1cd733 100644
--- a/tools/testing/selftests/kvm/.gitignore
+++ b/tools/testing/selftests/kvm/.gitignore
@@ -40,6 +40,7 @@
 /x86_64/set_sregs_test
 /x86_64/sev_all_boot_test
 /x86_64/sev_migrate_tests
+/x86_64/sev_private_mem_test
 /x86_64/smaller_maxphyaddr_emulation_test
 /x86_64/smm_test
 /x86_64/state_test
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 83c649c9de23..a8ee7c473644 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -104,6 +104,7 @@ TEST_GEN_PROGS_x86_64 += x86_64/pmu_event_filter_test
 TEST_GEN_PROGS_x86_64 += x86_64/private_mem_test
 TEST_GEN_PROGS_x86_64 += x86_64/set_boot_cpu_id
 TEST_GEN_PROGS_x86_64 += x86_64/set_sregs_test
+TEST_GEN_PROGS_x86_64 += x86_64/sev_private_mem_test
 TEST_GEN_PROGS_x86_64 += x86_64/smaller_maxphyaddr_emulation_test
 TEST_GEN_PROGS_x86_64 += x86_64/smm_test
 TEST_GEN_PROGS_x86_64 += x86_64/state_test
diff --git a/tools/testing/selftests/kvm/x86_64/sev_private_mem_test.c b/tools/testing/selftests/kvm/x86_64/sev_private_mem_test.c
new file mode 100644
index 000000000000..943fdfbe41d9
--- /dev/null
+++ b/tools/testing/selftests/kvm/x86_64/sev_private_mem_test.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022, Google LLC.
+ */
+#define _GNU_SOURCE /* for program_invocation_short_name */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <private_mem_test_helper.h>
+
+int main(int argc, char *argv[])
+{
+	execute_sev_vm_with_private_test_mem(
+				VM_MEM_SRC_ANONYMOUS_AND_RESTRICTED_MEMFD);
+
+	/* Needs 2MB Hugepages */
+	if (get_free_huge_2mb_pages() >= 1) {
+		printf("Running SEV VM private mem test with 2M pages\n");
+		execute_sev_vm_with_private_test_mem(
+				VM_MEM_SRC_ANON_HTLB2M_AND_RESTRICTED_MEMFD);
+	} else
+		printf("Skipping SEV VM private mem test with 2M pages\n");
+
+	return 0;
+}
-- 
2.39.0.314.g84b9a713c41-goog