From: Chao Gao <chao.gao@intel.com>
To: xen-devel@lists.xen.org
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
Jan Beulich <jbeulich@suse.com>, Chao Gao <chao.gao@intel.com>
Subject: [PATCH v5 2/4] x86/vcpu: track hvm vcpu number on the system
Date: Wed, 16 Aug 2017 13:14:36 +0800 [thread overview]
Message-ID: <1502860478-84512-3-git-send-email-chao.gao@intel.com> (raw)
In-Reply-To: <1502860478-84512-1-git-send-email-chao.gao@intel.com>
This number is used to calculate the average vcpus per pcpu ratio.
Signed-off-by: Chao Gao <chao.gao@intel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
v4:
- move the place we increase/decrease the hvm vcpu number to
hvm_vcpu_{initialise, destory}
---
xen/arch/x86/hvm/hvm.c | 6 ++++++
xen/include/asm-x86/hvm/hvm.h | 3 +++
2 files changed, 9 insertions(+)
diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index 555133f..37afdb4 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -109,6 +109,9 @@ static const char __initconst warning_hvm_fep[] =
static bool_t __initdata opt_altp2m_enabled = 0;
boolean_param("altp2m", opt_altp2m_enabled);
+/* Total number of HVM vCPUs on this system */
+atomic_t num_hvm_vcpus;
+
static int cpu_callback(
struct notifier_block *nfb, unsigned long action, void *hcpu)
{
@@ -1511,6 +1514,7 @@ int hvm_vcpu_initialise(struct vcpu *v)
hvm_update_guest_vendor(v);
+ atomic_inc(&num_hvm_vcpus);
return 0;
fail6:
@@ -1529,6 +1533,8 @@ int hvm_vcpu_initialise(struct vcpu *v)
void hvm_vcpu_destroy(struct vcpu *v)
{
+ atomic_dec(&num_hvm_vcpus);
+
viridian_vcpu_deinit(v);
hvm_all_ioreq_servers_remove_vcpu(v->domain, v);
diff --git a/xen/include/asm-x86/hvm/hvm.h b/xen/include/asm-x86/hvm/hvm.h
index b687e03..c51bd9f 100644
--- a/xen/include/asm-x86/hvm/hvm.h
+++ b/xen/include/asm-x86/hvm/hvm.h
@@ -25,6 +25,7 @@
#include <asm/hvm/asid.h>
#include <public/domctl.h>
#include <public/hvm/save.h>
+#include <xen/atomic.h>
#include <xen/mm.h>
#ifdef CONFIG_HVM_FEP
@@ -233,6 +234,8 @@ extern bool_t hvm_enabled;
extern bool_t cpu_has_lmsl;
extern s8 hvm_port80_allowed;
+extern atomic_t num_hvm_vcpus;
+
extern const struct hvm_function_table *start_svm(void);
extern const struct hvm_function_table *start_vmx(void);
--
1.8.3.1
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next prev parent reply other threads:[~2017-08-16 5:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-16 5:14 [PATCH v5 0/4] mitigate the per-pCPU blocking list may be too long Chao Gao
2017-08-16 5:14 ` [PATCH v5 1/4] VT-d PI: track the number of vcpus on pi blocking list Chao Gao
2017-08-30 16:00 ` Jan Beulich
2017-08-30 22:57 ` Chao Gao
2017-08-31 7:42 ` Jan Beulich
2017-08-31 7:15 ` Chao Gao
2017-08-31 8:33 ` Jan Beulich
2017-08-31 7:53 ` Chao Gao
2017-09-01 1:39 ` Chao Gao
2017-09-01 8:24 ` Jan Beulich
2017-09-01 7:55 ` Chao Gao
2017-09-01 9:13 ` Jan Beulich
2017-09-01 8:37 ` Chao Gao
2017-09-01 9:55 ` Jan Beulich
2017-09-01 10:04 ` Jan Beulich
2017-08-16 5:14 ` Chao Gao [this message]
2017-08-16 5:14 ` [PATCH v5 3/4] VT-d PI: restrict the number of vcpus in a given pcpu's PI " Chao Gao
2017-08-31 16:01 ` Jan Beulich
2017-08-16 5:14 ` [PATCH v5 4/4] xentrace: add support for HVM's PI blocking list operation Chao Gao
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