lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
 
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230725220132.2310657-14-afranji@google.com>
Date:   Tue, 25 Jul 2023 22:01:06 +0000
From:   Ryan Afranji <afranji@...gle.com>
To:     linux-kselftest@...r.kernel.org
Cc:     pbonzini@...hat.com, seanjc@...gle.com, isaku.yamahata@...el.com,
        sagis@...gle.com, erdemaktas@...gle.com, afranji@...gle.com,
        runanwang@...gle.com, shuah@...nel.org, drjones@...hat.com,
        maz@...nel.org, bgardon@...gle.com, jmattson@...gle.com,
        dmatlack@...gle.com, peterx@...hat.com, oupton@...gle.com,
        ricarkol@...gle.com, yang.zhong@...el.com, wei.w.wang@...el.com,
        xiaoyao.li@...el.com, pgonda@...gle.com, eesposit@...hat.com,
        borntraeger@...ibm.com, eric.auger@...hat.com,
        wangyanan55@...wei.com, aaronlewis@...gle.com, vkuznets@...hat.com,
        pshier@...gle.com, axelrasmussen@...gle.com,
        zhenzhong.duan@...el.com, maciej.szmigiero@...cle.com,
        like.xu@...ux.intel.com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, ackerleytng@...gle.com
Subject: [PATCH v4 13/28] KVM: selftests: TDX: Add TDX IO writes test

From: Sagi Shahar <sagis@...gle.com>

The test verifies IO writes of various sizes from the guest to the host.

Signed-off-by: Sagi Shahar <sagis@...gle.com>
Signed-off-by: Ackerley Tng <ackerleytng@...gle.com>
Change-Id: I91edb81a93d7bfd881ccde517c95b5728a2ba85e
Signed-off-by: Ryan Afranji <afranji@...gle.com>
---
 .../selftests/kvm/include/x86_64/tdx/tdcall.h |  3 +
 .../selftests/kvm/x86_64/tdx_vm_tests.c       | 91 +++++++++++++++++++
 2 files changed, 94 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h b/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h
index 78001bfec9c8..b5e94b7c48fa 100644
--- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h
+++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdcall.h
@@ -10,6 +10,9 @@
 #define TDG_VP_VMCALL_INSTRUCTION_IO_READ 0
 #define TDG_VP_VMCALL_INSTRUCTION_IO_WRITE 1
 
+#define TDG_VP_VMCALL_SUCCESS 0x0000000000000000
+#define TDG_VP_VMCALL_INVALID_OPERAND 0x8000000000000000
+
 #define TDX_HCALL_HAS_OUTPUT BIT(0)
 
 #define TDX_HYPERCALL_STANDARD 0
diff --git a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c
index 9e9c3ad08a21..ca0136930775 100644
--- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c
+++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c
@@ -339,6 +339,96 @@ void verify_get_td_vmcall_info(void)
 	printf("\t ... PASSED\n");
 }
 
+#define TDX_IO_WRITES_TEST_PORT 0x51
+
+/*
+ * Verifies IO functionality by writing values of different sizes
+ * to the host.
+ */
+void guest_io_writes(void)
+{
+	uint64_t byte_1 = 0xAB;
+	uint64_t byte_2 = 0xABCD;
+	uint64_t byte_4 = 0xFFABCDEF;
+	uint64_t ret;
+
+	ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 1,
+					TDG_VP_VMCALL_INSTRUCTION_IO_WRITE,
+					&byte_1);
+	if (ret)
+		tdx_test_fatal(ret);
+
+	ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 2,
+					TDG_VP_VMCALL_INSTRUCTION_IO_WRITE,
+					&byte_2);
+	if (ret)
+		tdx_test_fatal(ret);
+
+	ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 4,
+					TDG_VP_VMCALL_INSTRUCTION_IO_WRITE,
+					&byte_4);
+	if (ret)
+		tdx_test_fatal(ret);
+
+	// Write an invalid number of bytes.
+	ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 5,
+					TDG_VP_VMCALL_INSTRUCTION_IO_WRITE,
+					&byte_4);
+	if (ret)
+		tdx_test_fatal(ret);
+
+	tdx_test_success();
+}
+
+void verify_guest_writes(void)
+{
+	struct kvm_vm *vm;
+	struct kvm_vcpu *vcpu;
+
+	uint8_t byte_1;
+	uint16_t byte_2;
+	uint32_t byte_4;
+
+	vm = td_create();
+	td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0);
+	vcpu = td_vcpu_add(vm, 0, guest_io_writes);
+	td_finalize(vm);
+
+	printf("Verifying guest writes:\n");
+
+	td_vcpu_run(vcpu);
+	TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
+	TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 1,
+			TDG_VP_VMCALL_INSTRUCTION_IO_WRITE);
+	byte_1 = *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset);
+
+	td_vcpu_run(vcpu);
+	TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
+	TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 2,
+			TDG_VP_VMCALL_INSTRUCTION_IO_WRITE);
+	byte_2 = *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset);
+
+	td_vcpu_run(vcpu);
+	TDX_TEST_CHECK_GUEST_FAILURE(vcpu);
+	TDX_TEST_ASSERT_IO(vcpu, TDX_IO_WRITES_TEST_PORT, 4,
+			TDG_VP_VMCALL_INSTRUCTION_IO_WRITE);
+	byte_4 = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset);
+
+	ASSERT_EQ(byte_1, 0xAB);
+	ASSERT_EQ(byte_2, 0xABCD);
+	ASSERT_EQ(byte_4, 0xFFABCDEF);
+
+	td_vcpu_run(vcpu);
+	ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT);
+	ASSERT_EQ(vcpu->run->system_event.data[1], TDG_VP_VMCALL_INVALID_OPERAND);
+
+	td_vcpu_run(vcpu);
+	TDX_TEST_ASSERT_SUCCESS(vcpu);
+
+	kvm_vm_free(vm);
+	printf("\t ... PASSED\n");
+}
+
 int main(int argc, char **argv)
 {
 	setbuf(stdout, NULL);
@@ -353,6 +443,7 @@ int main(int argc, char **argv)
 	run_in_new_process(&verify_td_ioexit);
 	run_in_new_process(&verify_td_cpuid);
 	run_in_new_process(&verify_get_td_vmcall_info);
+	run_in_new_process(&verify_guest_writes);
 
 	return 0;
 }
-- 
2.41.0.487.g6d72f3e995-goog

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ