The INVPCID enabling test assumes cr3[11:0] is 0. But at present PCID enabling
test sets cr3[11:0] to 1 for its own purpose and doesn't restore the register,
which leads to a failure when INVPCID test tries to enable PCIDE.
This patch restores cr3 after PCID enabling test is done so that PCIDE can be
enabled normally in later tests.
Signed-off-by: Junjie Mao <junjie.mao@xxxxxxxxx>
---
x86/pcid.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/x86/pcid.c b/x86/pcid.c
index de0f6fe..8bfeba2 100644
--- a/x86/pcid.c
+++ b/x86/pcid.c
@@ -79,6 +79,7 @@ void test_pcid_enabled(void)
write_cr3(cr3 | 0x001);
if (write_cr4_checking(cr4 | X86_CR4_PCIDE) != GP_VECTOR)
goto report;
+ write_cr3(cr3);
passed = 1;
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
