On 25/03/15 12:31, Feng Wu wrote:
This patch defines two per-cpu variants:
You do not mean variants. You mean variables.
~Andrew
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.
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 {
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