-Original Message-
From: Tian, Kevin
Sent: Thursday, April 02, 2015 1:55 PM
To: Wu, Feng; xen-devel@lists.xen.org
Cc: jbeul...@suse.com; k...@xen.org; Zhang, Yang Z
Subject: RE: [RFC v1 10/15] vmx: Define two per-cpu variants
From: Wu, Feng
Sent: Wednesday, March 25, 2015 8:32 PM
This patch defines two per-cpu variants:
blocked_vcpu_on_cpu:
A list storing the vCPUs which were blocked on this pCPU.
blocked_vcpu_on_cpu_lock:
The spinlock to protect blocked_vcpu_on_cpu.
since above two are already per-cpu variants, you don't need
'on_cpu' in the name to duplicate it. How about just call them
blocked_vcpus and blocked_vcpus_lock? :-)
Sounds great!
Thanks,
Feng
Signed-off-by: Feng Wu feng...@intel.com
---
xen/arch/x86/hvm/vmx/vmcs.c | 3 +++
xen/arch/x86/hvm/vmx/vmx.c| 7 +++
xen/include/asm-x86/hvm/vmx/vmx.h | 3 +++
3 files changed, 13 insertions(+)
diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 942f4b7..1345e69 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -585,6 +585,9 @@ int vmx_cpu_up(void)
if ( cpu_has_vmx_vpid )
vpid_sync_all();
+INIT_LIST_HEAD(per_cpu(blocked_vcpu_on_cpu, cpu));
+spin_lock_init(per_cpu(blocked_vcpu_on_cpu_lock, cpu));
+
return 0;
}
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index e1c55ce..ff5544d 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -81,6 +81,13 @@ static int vmx_msr_read_intercept(unsigned int msr,
uint64_t *msr_content);
static int vmx_msr_write_intercept(unsigned int msr, uint64_t
msr_content);
static void vmx_invlpg_intercept(unsigned long vaddr);
+/*
+ * We maintian a per-CPU linked-list of vCPU, so in PI wakeup handler we
+ * can find which vCPU should be waken up.
+ */
+DEFINE_PER_CPU(struct list_head, blocked_vcpu_on_cpu);
+DEFINE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock);
+
uint8_t __read_mostly posted_intr_vector;
static int vmx_domain_initialise(struct domain *d)
diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h
b/xen/include/asm-x86/hvm/vmx/vmx.h
index 3cd75eb..e643c3c 100644
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -30,6 +30,9 @@
#include asm/hvm/vmx/vmcs.h
#include asm/apic.h
+DECLARE_PER_CPU(struct list_head, blocked_vcpu_on_cpu);
+DECLARE_PER_CPU(spinlock_t, blocked_vcpu_on_cpu_lock);
+
extern uint8_t posted_intr_vector;
typedef union {
--
2.1.0
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