When the APIC virtualization address references unbacked memory, kvm
incorrectly fails a VM-entry with "invalid control field(s)." Until
this can be fixed, just skip the VMX control field tests that populate
a VMCS field with a physical address that isn't backed.
Tested: <multi line explanation of how the code was tested>
Effort: <Your effort group>
Google-Bug-Id: <buganizer-id>
Change-Id: I624091cb5cd7cfaae887de8f017e18b5f95d8f61
Signed-off-by: Jim Mattson <jmattson@xxxxxxxxxx>
---
x86/vmx_tests.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index 088d32aaee0b..e82bc04d72e2 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -3359,6 +3359,12 @@ static void test_vmcs_page_addr(const char *name,
bool ignored,
u64 addr)
{
+ /*
+ * Skip tests that reference unbacked memory for now, because
+ * kvm doesn't always handle this situation correctly.
+ */
+ if (addr > fwcfg_get_u64(FW_CFG_RAM_SIZE) - PAGE_SIZE)
+ return;
report_prefix_pushf("%s = %lx", name, addr);
vmcs_write(encoding, addr);
test_vmx_controls(ignored || (IS_ALIGNED(addr, PAGE_SIZE) &&
--
2.14.1.690.gbb1197296e-goog
