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From: Nadav Amit <nadav.amit@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>,
	kvm@vger.kernel.org, "Nadav Amit" <nadav.amit@gmail.com>
Subject: [kvm-unit-tests PATCH] x86: Fix wrong test for 5-level page-table
Date: Wed, 10 Apr 2019 14:13:34 -0700	[thread overview]
Message-ID: <20190410211334.13391-1-nadav.amit@gmail.com> (raw)

Untested, but clearly bit 12 is the one that needs to be tested.

Signed-off-by: Nadav Amit <nadav.amit@gmail.com>
---
 x86/cstart64.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x86/cstart64.S b/x86/cstart64.S
index 21db10f..8626f02 100644
--- a/x86/cstart64.S
+++ b/x86/cstart64.S
@@ -243,7 +243,7 @@ start64:
 setup_5level_page_table:
 	/* Check if 5-level paging has already enabled */
 	mov %cr4, %rax
-	test $12, %eax
+	bt $12, %eax
 	jnz lvl5
 
 	pushq $32
-- 
2.17.1


             reply	other threads:[~2019-04-11  4:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-10 21:13 Nadav Amit [this message]
2019-04-11 13:41 ` [kvm-unit-tests PATCH] x86: Fix wrong test for 5-level page-table Sean Christopherson
2019-04-11 13:44   ` Sean Christopherson
2019-04-11 16:47   ` Nadav Amit

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