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From: Euan Harris <euan.harris@citrix.com>
To: xen-devel@lists.xenproject.org
Cc: andrew.cooper3@citrix.com, kevin.tian@intel.com,
	Euan Harris <euan.harris@citrix.com>,
	jun.nakajima@intel.com, jbeulich@suse.com
Subject: [PATCH] nested vmx: Intercept guest rdmsr for MSR_IA32_VMX_VMFUNC
Date: Tue, 7 Jun 2016 10:18:38 +0000	[thread overview]
Message-ID: <1465294718-31626-1-git-send-email-euan.harris@citrix.com> (raw)

Guest reads of MSR_IA32_VMX_VMFUNC should be handled by
the logic in vmx_msr_read_intercept().   Otherwise a guest
can read the raw host value of this MSR, even if nested
vmx is disabled.

Signed-off-by: Euan Harris <euan.harris@citrix.com>
 xen/arch/x86/hvm/vmx/vmx.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 743b5a1..6c0721f 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2624,7 +2624,7 @@ static int vmx_msr_read_intercept(unsigned int msr, uint64_t *msr_content)
         __vmread(GUEST_IA32_DEBUGCTL, msr_content);
         if ( !nvmx_msr_read_intercept(msr, msr_content) )
             goto gp_fault;

Xen-devel mailing list

             reply	other threads:[~2016-06-07 10:18 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-07 10:18 Euan Harris [this message]
2016-06-07 10:35 ` Jan Beulich
2016-06-07 10:53   ` Euan Harris
2016-06-07 11:39     ` Andrew Cooper
2016-06-08  6:09 ` Tian, Kevin
2016-06-08 11:54 ` Wei Liu

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