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From: Brian Woods <brian.woods@amd.com>
To: xen-devel@lists.xen.org
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Brian Woods <brian.woods@amd.com>,
	Jan Beulich <jbeulich@suse.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH 2/2] x86/svm: enable pause filtering threshold
Date: Tue, 20 Feb 2018 18:12:33 -0600	[thread overview]
Message-ID: <20180221001233.62644-3-brian.woods@amd.com> (raw)
In-Reply-To: <20180221001233.62644-1-brian.woods@amd.com>

If available, enable the pause filtering threshold feature.  See the
previous commit for more information.

Signed-off-by: Brian Woods <brian.woods@amd.com>
---
 xen/arch/x86/hvm/svm/svm.c  | 1 +
 xen/arch/x86/hvm/svm/vmcb.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 9f58afc2d8..b6b92365bf 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1694,6 +1694,7 @@ const struct hvm_function_table * __init start_svm(void)
     P(cpu_has_svm_vloadsave, "Virtual VMLOAD/VMSAVE");
     P(cpu_has_svm_vgif, "Virtual GIF");
     P(cpu_has_pause_filter, "Pause-Intercept Filter");
+    P(cpu_has_pause_thresh, "Pause-Intercept Filter Threshold");
     P(cpu_has_tsc_ratio, "TSC Rate MSR");
 #undef P
 
diff --git a/xen/arch/x86/hvm/svm/vmcb.c b/xen/arch/x86/hvm/svm/vmcb.c
index 0e6cba5b7b..ebe6f0c751 100644
--- a/xen/arch/x86/hvm/svm/vmcb.c
+++ b/xen/arch/x86/hvm/svm/vmcb.c
@@ -227,6 +227,9 @@ static int construct_vmcb(struct vcpu *v)
     {
         vmcb->_pause_filter_count = SVM_PAUSEFILTER_INIT;
         vmcb->_general1_intercepts |= GENERAL1_INTERCEPT_PAUSE;
+
+        if ( cpu_has_pause_thresh )
+            vmcb->_pause_filter_thresh = SVM_PAUSETHRESH_INIT;
     }
 
     vmcb->cleanbits.bytes = 0;
-- 
2.11.0


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  parent reply	other threads:[~2018-02-21  0:12 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-21  0:12 [PATCH 0/2] x86/svm: add pause filtering threshold for SVM Brian Woods
2018-02-21  0:12 ` [PATCH 1/2] x86/svm: add support for pause filtering threshold Brian Woods
2018-02-21 17:36   ` Moger, Babu
2018-02-23  9:44   ` Jan Beulich
2018-02-21  0:12 ` Brian Woods [this message]
2018-02-21 17:36   ` [PATCH 2/2] x86/svm: enable " Moger, Babu
2018-02-21  0:17 ` [PATCH 0/2] x86/svm: add pause filtering threshold for SVM Brian Woods
2018-02-21 23:30 ` Boris Ostrovsky

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