From: Kevin Wolf <kwolf@redhat.com>
To: kvm@vger.kernel.org
Cc: kwolf@redhat.com, gleb@redhat.com, joerg.roedel@amd.com,
yoshikawa.takuya@oss.ntt.co.jp, avi@redhat.com,
mtosatti@redhat.com
Subject: [PATCH v2 2/3] KVM: x86 emulator: VM86 segments must have DPL 3
Date: Fri, 27 Jan 2012 20:23:35 +0100 [thread overview]
Message-ID: <1327692216-20450-3-git-send-email-kwolf@redhat.com> (raw)
In-Reply-To: <1327692216-20450-1-git-send-email-kwolf@redhat.com>
Setting the segment DPL to 0 for at least the VM86 code segment makes
the VM entry fail on VMX.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
arch/x86/kvm/emulate.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1b98a2c..833969e 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -1243,6 +1243,8 @@ static int load_segment_descriptor(struct x86_emulate_ctxt *ctxt,
seg_desc.type = 3;
seg_desc.p = 1;
seg_desc.s = 1;
+ if (ctxt->mode == X86EMUL_MODE_VM86)
+ seg_desc.dpl = 3;
goto load;
}
--
1.7.6.5
next prev parent reply other threads:[~2012-01-27 19:20 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-27 19:23 [PATCH v2 0/3] Fix task switches into/out of VM86 Kevin Wolf
2012-01-27 19:23 ` [PATCH v2 1/3] KVM: x86 emulator: Fix task switch privilege checks Kevin Wolf
2012-01-30 10:39 ` Avi Kivity
2012-01-30 11:12 ` Kevin Wolf
2012-01-27 19:23 ` Kevin Wolf [this message]
2012-01-27 19:23 ` [PATCH v2 3/3] KVM: x86 emulator: Allow PM/VM86 switch during task switch Kevin Wolf
2012-01-30 10:24 ` Avi Kivity
2012-01-30 10:56 ` Gleb Natapov
2012-01-30 12:02 ` Avi Kivity
2012-01-30 12:04 ` Gleb Natapov
2012-01-30 13:24 ` Avi Kivity
2012-01-30 11:05 ` Kevin Wolf
2012-01-30 11:09 ` Gleb Natapov
2012-01-30 13:23 ` Avi Kivity
2012-01-30 14:01 ` Kevin Wolf
2012-01-30 14:32 ` Avi Kivity
2012-01-30 15:26 ` Kevin Wolf
2012-01-30 15:44 ` Avi Kivity
2012-01-30 15:55 ` Takuya Yoshikawa
2012-01-31 9:37 ` Gleb Natapov
2012-01-31 10:26 ` Avi Kivity
2012-01-27 19:52 ` [PATCH v2 0/3] Fix task switches into/out of VM86 Gleb Natapov
2012-01-30 8:48 ` Kevin Wolf
2012-01-30 8:55 ` Gleb Natapov
2012-01-30 10:22 ` Gleb Natapov
2012-01-30 10:35 ` Kevin Wolf
2012-01-30 10:45 ` Avi Kivity
2012-01-30 10:50 ` Gleb Natapov
2012-01-30 11:59 ` Avi Kivity
2012-01-30 12:16 ` Gleb Natapov
2012-01-30 13:27 ` Avi Kivity
2012-01-30 12:31 ` Gleb Natapov
2012-01-30 13:28 ` Avi Kivity
2012-01-30 13:29 ` Gleb Natapov
2012-01-30 13:39 ` Avi Kivity
2012-01-30 10:47 ` Gleb Natapov
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