From: Krish Sadhukhan <krish.sadhukhan@oracle.com>
To: kvm@vger.kernel.org
Cc: pbonzini@redhat.com, jmattson@google.com,
sean.j.christopherson@intel.com
Subject: [PATCH 3/3] kvm-unit-tests: nVMX: Test GUEST_LIMIT_GDTR and GUEST_LIMIT_IDTR on vmentry of nested guests
Date: Fri, 22 May 2020 20:26:03 -0400 [thread overview]
Message-ID: <20200523002603.32450-4-krish.sadhukhan@oracle.com> (raw)
In-Reply-To: <20200523002603.32450-1-krish.sadhukhan@oracle.com>
According to section "Checks on Guest Descriptor-Table Registers" in Intel
SDM vol 3C, the following checks are performed on the Guest Descriptor-Table
Registers on vmentry of nested guests:
- Bits 31:16 of each limit field must be 0.
Signed-off-by: Krish Sadhukhan <krish.sadhukhan@oracle.com>
---
x86/vmx_tests.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index f400408..7b6205d 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -7836,6 +7836,17 @@ static void vmx_guest_state_area_test(void)
test_canonical(GUEST_BASE_IDTR, "GUEST_BASE_IDTR", false);
#endif
+ u32 guest_desc_limit_saved = vmcs_read(GUEST_LIMIT_GDTR);
+ TEST_GUEST_VMCS_FIELD_RESERVED_BITS(16, 31, 4, GUEST_LIMIT_GDTR,
+ "GUEST_LIMIT_GDTR", guest_desc_limit_saved, "GUEST_LIMIT_GDTR",
+ true);
+ vmcs_write(GUEST_LIMIT_GDTR, guest_desc_limit_saved);
+ guest_desc_limit_saved = vmcs_read(GUEST_LIMIT_IDTR);
+ TEST_GUEST_VMCS_FIELD_RESERVED_BITS(16, 31, 4, GUEST_LIMIT_IDTR,
+ "GUEST_LIMIT_IDTR", guest_desc_limit_saved, "GUEST_LIMIT_IDTR",
+ true);
+ vmcs_write(GUEST_LIMIT_IDTR, guest_desc_limit_saved);
+
/*
* Let the guest finish execution
*/
--
1.8.3.1
prev parent reply other threads:[~2020-05-23 1:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-23 0:26 [PATCH 0/3] kvm-unit-tests: nVMX: Test base and limit fields of guest GDTR and IDTR Krish Sadhukhan
2020-05-23 0:26 ` [PATCH 1/3] kvm-unit-tests: nVMX: Test GUEST_BASE_GDTR and GUEST_BASE_IDTR on vmentry of nested guests Krish Sadhukhan
2020-05-27 5:17 ` Sean Christopherson
2020-05-23 0:26 ` [PATCH 2/3] kvm-unit-tests: nVMX: Optimize test_guest_dr7() by factoring out the loops into a macro Krish Sadhukhan
2020-05-23 0:26 ` Krish Sadhukhan [this message]
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