From: "Liu, Jinsong" <jinsong.liu@intel.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
"keir@xen.org" <keir@xen.org>,
"Ian.Campbell@citrix.com" <Ian.Campbell@citrix.com>,
"haoxudong.hao@gmail.com" <haoxudong.hao@gmail.com>
Subject: X86: generic MSRs save/restore
Date: Fri, 13 Dec 2013 07:57:43 +0000 [thread overview]
Message-ID: <DE8DF0795D48FD4CA783C40EC82923350142598E@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <529F47D2020000780010A0E4@nat28.tlf.novell.com>
x86: MSR_IA32_BNDCFGS save/restore
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -580,6 +580,50 @@ static int vmx_load_vmcs_ctxt(struct vcp
return 0;
}
+static unsigned int __init vmx_init_msr(void)
+{
+ return !!cpu_has_mpx;
+}
+
+static void vmx_save_msr(struct vcpu *v, struct hvm_msr *ctxt)
+{
+ vmx_vmcs_enter(v);
+
+ if ( cpu_has_mpx )
+ {
+ __vmread(GUEST_BNDCFGS, &ctxt->msr[ctxt->count].val);
+ if ( ctxt->msr[ctxt->count].val )
Isn't it better to remove if()?
+ ctxt->msr[ctxt->count++].index = MSR_IA32_BNDCFGS;
+ }
+
+ vmx_vmcs_exit(v);
+}
+
+static int vmx_load_msr(struct vcpu *v, const struct hvm_one_msr *msr)
+{
+ int err = 0;
+
+ vmx_vmcs_enter(v);
+
+ switch ( msr->index )
+ {
+ case MSR_IA32_BNDCFGS:
+ if ( cpu_has_mpx )
+ __vmwrite(GUEST_BNDCFGS, msr->val);
+ else
+ err = -ENXIO;
+ break;
+
+ default:
+ err = -ENOENT;
+ break;
+ }
+
+ vmx_vmcs_exit(v);
+
+ return err;
+}
+
static void vmx_fpu_enter(struct vcpu *v)
{
vcpu_restore_fpu_lazy(v);
@@ -1606,6 +1650,9 @@ static struct hvm_function_table __initd
.vcpu_destroy = vmx_vcpu_destroy,
.save_cpu_ctxt = vmx_save_vmcs_ctxt,
.load_cpu_ctxt = vmx_load_vmcs_ctxt,
+ .init_msr = vmx_init_msr,
+ .save_msr = vmx_save_msr,
+ .load_msr = vmx_load_msr,
.get_interrupt_shadow = vmx_get_interrupt_shadow,
.set_interrupt_shadow = vmx_set_interrupt_shadow,
.guest_x86_mode = vmx_guest_x86_mode,
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -367,6 +367,8 @@ enum vmcs_field {
GUEST_PDPTR2_HIGH = 0x0000280f,
GUEST_PDPTR3 = 0x00002810,
GUEST_PDPTR3_HIGH = 0x00002811,
+ GUEST_BNDCFGS = 0x00002812,
+ GUEST_BNDCFGS_HIGH = 0x00002813,
HOST_PAT = 0x00002c00,
HOST_PAT_HIGH = 0x00002c01,
HOST_EFER = 0x00002c02,
next prev parent reply other threads:[~2013-12-13 7:57 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-03 14:50 [PATCH v5 4/7] X86: generic MSRs save/restore Liu, Jinsong
2013-12-04 14:18 ` Jan Beulich
2013-12-13 7:50 ` Liu, Jinsong
2013-12-13 9:44 ` Jan Beulich
2013-12-13 7:57 ` Liu, Jinsong [this message]
2013-12-13 9:47 ` Jan Beulich
2013-12-13 12:04 ` Andrew Cooper
2013-12-13 12:26 ` Jan Beulich
2013-12-13 14:01 ` [PATCH v2] x86: " Jan Beulich
2013-12-13 17:44 ` Andrew Cooper
2013-12-16 3:12 ` Liu, Jinsong
2013-12-16 8:03 ` Jan Beulich
2013-12-16 3:01 ` Liu, Jinsong
2013-12-16 8:04 ` Jan Beulich
2013-12-16 8:39 ` Liu, Jinsong
2013-12-16 8:52 ` Jan Beulich
2013-12-16 9:13 ` Liu, Jinsong
2013-12-16 9:41 ` Jan Beulich
2013-12-16 9:53 ` Liu, Jinsong
2013-12-16 10:01 ` Jan Beulich
2013-12-16 10:05 ` Liu, Jinsong
2013-12-16 11:11 ` Jan Beulich
2013-12-16 13:23 ` Liu, Jinsong
2013-12-16 13:34 ` Jan Beulich
2013-12-16 13:57 ` Liu, Jinsong
2013-12-16 14:01 ` Liu, Jinsong
2013-12-18 12:20 ` Liu, Jinsong
2013-12-13 14:02 ` [PATCH v2] x86: MSR_IA32_BNDCFGS save/restore Jan Beulich
2013-12-13 17:57 ` Andrew Cooper
2013-12-16 3:22 ` Liu, Jinsong
2013-12-16 8:06 ` Jan Beulich
2013-12-16 3:23 ` Liu, Jinsong
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