The EPT tests require at least 40 bits of physical address space so that
they can use a separate EPT L4 entry to hold guest data. Qemu defaults
to 40 bits for the size of the guest PA, which causes the tests' check
against CPUID to always pass regardless of the system's actual PA space.
This results in unexpected reserved-bit page faults due to attempting to
access a GPA beyond the physical address width of the system, i.e. bit
39 is reserved.
Pass host_phys_bits for the tests to instruct Qemu to use the host's PA
bits. Qemu has supported this option since v2.7, which was released in
2016, before the introduction of the EPT tests in 2017.
GPA bits mapped to EPT levels:
Offset: 11:0
EPT L1: 20:12
EPT L2: 29:21
EPT L3: 38:30
EPT L4: 47:39
EPT L5: 56:48
Fixes: 359575f ("x86: ept access tests")
Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
---
x86/unittests.cfg | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index d7975e9..64ecb43 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -412,121 +412,121 @@ groups = vmx
[vmx_ept_access_test_not_present]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_not_present
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_not_present
arch = x86_64
groups = vmx
[vmx_ept_access_test_read_only]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_read_only
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_read_only
arch = x86_64
groups = vmx
[vmx_ept_access_test_write_only]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_write_only
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_write_only
arch = x86_64
groups = vmx
[vmx_ept_access_test_read_write]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_read_write
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_read_write
arch = x86_64
groups = vmx
[vmx_ept_access_test_execute_only]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_execute_only
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_execute_only
arch = x86_64
groups = vmx
[vmx_ept_access_test_read_execute]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_read_execute
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_read_execute
arch = x86_64
groups = vmx
[vmx_ept_access_test_write_execute]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_write_execute
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_write_execute
arch = x86_64
groups = vmx
[vmx_ept_access_test_read_write_execute]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_read_write_execute
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_read_write_execute
arch = x86_64
groups = vmx
[vmx_ept_access_test_reserved_bits]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_reserved_bits
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_reserved_bits
arch = x86_64
groups = vmx
[vmx_ept_access_test_ignored_bits]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_ignored_bits
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_ignored_bits
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_not_present_ad_disabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_not_present_ad_disabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_not_present_ad_disabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_not_present_ad_enabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_not_present_ad_enabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_not_present_ad_enabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_only_ad_disabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_only_ad_disabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_only_ad_disabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_only_ad_enabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_only_ad_enabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_only_ad_enabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_write]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_write
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_write
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_write_execute]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_write_execute
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_write_execute
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_execute_ad_disabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_execute_ad_disabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_execute_ad_disabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_read_execute_ad_enabled]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_read_execute_ad_enabled
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_read_execute_ad_enabled
arch = x86_64
groups = vmx
[vmx_ept_access_test_paddr_not_present_page_fault]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_paddr_not_present_page_fault
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_paddr_not_present_page_fault
arch = x86_64
groups = vmx
[vmx_ept_access_test_force_2m_page]
file = vmx.flat
-extra_params = -cpu host,+vmx -m 2560 -append ept_access_test_force_2m_page
+extra_params = -cpu host,host-phys-bits,+vmx -m 2560 -append ept_access_test_force_2m_page
arch = x86_64
groups = vmx
--
2.20.1
