VMX: Turn on posted interrupt bit in vmcs

Turn on posted interrupt for vcpu if posted interrupt is avaliable.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Jun Nakajima <jun.nakajima@intel.com>
Acked-by: Keir Fraser <keir@xen.org>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com> (from a release perspective)

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index d634d488e6a1a5b10d11673d4248086d3479872e..ef0ee7f836b8def870a8989bbdaf67cd80c6a703 100644 (file)
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -926,6 +926,12 @@ static int construct_vmcs(struct vcpu *v)
         __vmwrite(GUEST_INTR_STATUS, 0);
     }
 
+    if ( cpu_has_vmx_posted_intr_processing )
+    {
+        __vmwrite(PI_DESC_ADDR, virt_to_maddr(&v->arch.hvm_vmx.pi_desc));
+        __vmwrite(POSTED_INTR_NOTIFICATION_VECTOR, posted_intr_vector);
+    }
+
     /* Host data selectors. */
     __vmwrite(HOST_SS_SELECTOR, __HYPERVISOR_DS);
     __vmwrite(HOST_DS_SELECTOR, __HYPERVISOR_DS);

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index e36dbcbad15fb5e1e83864dbde99003525f3a174..0aa4b8293e89e3fc2f879b1adc3fb2bb74642480 100644 (file)
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -75,6 +75,8 @@ 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);
 
+uint8_t __read_mostly posted_intr_vector;
+
 static int vmx_domain_initialise(struct domain *d)
 {
     int rc;
@@ -1521,6 +1523,9 @@ struct hvm_function_table * __init start_vmx(void)
 
         setup_ept_dump();
     }
+ 
+    if ( cpu_has_vmx_posted_intr_processing )
+        alloc_direct_apic_vector(&posted_intr_vector, event_check_interrupt);
 
     setup_vmcs_dump();
 

diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index 3a5c91ab848b5f21122d18d1093af4e57b9b844e..f30e5ac224c5c1247d8333ed9e5435c060492ce0 100644 (file)
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -21,6 +21,7 @@
 
 #include <asm/hvm/io.h>
 #include <asm/hvm/vpmu.h>
+#include <irq_vectors.h>
 
 extern void vmcs_dump_vcpu(struct vcpu *v);
 extern void setup_vmcs_dump(void);
@@ -73,6 +74,12 @@ struct vmx_domain {
     unsigned long apic_access_mfn;
 };
 
+struct pi_desc {
+    DECLARE_BITMAP(pir, NR_VECTORS);
+    u32 control;
+    u32 rsvd[7];
+} __attribute__ ((aligned (64)));
+
 #define ept_get_wl(ept)   ((ept)->ept_wl)
 #define ept_get_asr(ept)  ((ept)->asr)
 #define ept_get_eptp(ept) ((ept)->eptp)
@@ -113,6 +120,7 @@ struct arch_vmx_struct {
 
     uint32_t             eoi_exitmap_changed;
     uint64_t             eoi_exit_bitmap[4];
+    struct pi_desc       pi_desc;
 
     unsigned long        host_cr0;
 

diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h
index d4d6feb461241bf686ea4680247a46b99c243b3b..7efe0f3c16e1553ca05adf5299dbb3c38ac8d443 100644 (file)
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -217,6 +217,7 @@ void vmx_update_secondary_exec_control(struct vcpu *v);
 #define MODRM_EAX_ECX   ".byte 0xc1\n" /* EAX, ECX */
 
 extern u64 vmx_ept_vpid_cap;
+extern uint8_t posted_intr_vector;
 
 #define cpu_has_vmx_ept_exec_only_supported        \
     (vmx_ept_vpid_cap & VMX_EPT_EXEC_ONLY_SUPPORTED)