On Mon, 24 May 2010, Keir Fraser wrote:
> Please add documentation to include/public/hvm/param.h about how to specify
> the new callback method, and detect when it is available. Move the new
> is_hvm_pv_blah macros out into an appropriate include/asm-x86 header file --
> They are not arch independent.
Done.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
diff -r 12c79a476007 xen/arch/x86/hvm/irq.c
--- a/xen/arch/x86/hvm/irq.c Tue May 25 09:08:34 2010 +0100
+++ b/xen/arch/x86/hvm/irq.c Tue May 25 10:44:07 2010 +0100
@@ -185,16 +185,16 @@
void hvm_assert_evtchn_irq(struct vcpu *v)
{
- if ( v->vcpu_id != 0 )
- return;
-
if ( unlikely(in_irq() || !local_irq_is_enabled()) )
{
tasklet_schedule(&v->arch.hvm_vcpu.assert_evtchn_irq_tasklet);
return;
}
- hvm_set_callback_irq_level(v);
+ if ( is_hvm_pv_evtchn_vcpu(v) )
+ vcpu_kick(v);
+ else if ( v->vcpu_id == 0 )
+ hvm_set_callback_irq_level(v);
}
void hvm_set_pci_link_route(struct domain *d, u8 link, u8 isa_irq)
@@ -251,7 +251,7 @@
via_type = (uint8_t)(via >> 56) + 1;
if ( ((via_type == HVMIRQ_callback_gsi) && (via == 0)) ||
- (via_type > HVMIRQ_callback_pci_intx) )
+ (via_type > HVMIRQ_callback_vector) )
via_type = HVMIRQ_callback_none;
spin_lock(&d->arch.hvm_domain.irq_lock);
@@ -297,6 +297,9 @@
if ( hvm_irq->callback_via_asserted )
__hvm_pci_intx_assert(d, pdev, pintx);
break;
+ case HVMIRQ_callback_vector:
+ hvm_irq->callback_via.vector = (uint8_t)via;
+ break;
default:
break;
}
@@ -312,6 +315,10 @@
case HVMIRQ_callback_pci_intx:
printk("PCI INTx Dev 0x%02x Int%c\n", pdev, 'A' + pintx);
break;
+ case HVMIRQ_callback_vector:
+ printk("Set HVMIRQ_callback_vector to %u\n",
+ hvm_irq->callback_via.vector);
+ break;
default:
printk("None\n");
break;
@@ -323,6 +330,10 @@
struct hvm_domain *plat = &v->domain->arch.hvm_domain;
int vector;
+ if (plat->irq.callback_via_type == HVMIRQ_callback_vector &&
+ vcpu_info(v, evtchn_upcall_pending))
+ return hvm_intack_vector(plat->irq.callback_via.vector);
+
if ( unlikely(v->nmi_pending) )
return hvm_intack_nmi;
@@ -363,6 +374,8 @@
case hvm_intsrc_lapic:
if ( !vlapic_ack_pending_irq(v, intack.vector) )
intack = hvm_intack_none;
+ break;
+ case hvm_intsrc_vector:
break;
default:
intack = hvm_intack_none;
diff -r 12c79a476007 xen/arch/x86/hvm/vmx/intr.c
--- a/xen/arch/x86/hvm/vmx/intr.c Tue May 25 09:08:34 2010 +0100
+++ b/xen/arch/x86/hvm/vmx/intr.c Tue May 25 10:44:07 2010 +0100
@@ -164,7 +164,8 @@
{
HVMTRACE_2D(INJ_VIRQ, intack.vector, /*fake=*/ 0);
vmx_inject_extint(intack.vector);
- pt_intr_post(v, intack);
+ if (intack.source != hvm_intsrc_vector)
+ pt_intr_post(v, intack);
}
/* Is there another IRQ to queue up behind this one? */
diff -r 12c79a476007 xen/common/kernel.c
--- a/xen/common/kernel.c Tue May 25 09:08:34 2010 +0100
+++ b/xen/common/kernel.c Tue May 25 10:44:07 2010 +0100
@@ -260,7 +260,8 @@
(1U << XENFEAT_highmem_assist) |
(1U << XENFEAT_gnttab_map_avail_bits);
else
- fi.submap |= (1U << XENFEAT_hvm_safe_pvclock);
+ fi.submap |= (1U << XENFEAT_hvm_safe_pvclock) |
+ (1U << XENFEAT_hvm_callback_vector);
#endif
break;
default:
diff -r 12c79a476007 xen/include/asm-x86/domain.h
--- a/xen/include/asm-x86/domain.h Tue May 25 09:08:34 2010 +0100
+++ b/xen/include/asm-x86/domain.h Tue May 25 10:44:07 2010 +0100
@@ -18,6 +18,10 @@
#define is_pv_32on64_domain(d) (0)
#endif
#define is_pv_32on64_vcpu(v) (is_pv_32on64_domain((v)->domain))
+
+#define is_hvm_pv_evtchn_domain(d) (is_hvm_domain(d) && \
+ d->arch.hvm_domain.irq.callback_via_type == HVMIRQ_callback_vector)
+#define is_hvm_pv_evtchn_vcpu(v) (is_hvm_pv_evtchn_domain(v->domain))
#define VCPU_TRAP_NMI 1
#define VCPU_TRAP_MCE 2
diff -r 12c79a476007 xen/include/asm-x86/hvm/hvm.h
--- a/xen/include/asm-x86/hvm/hvm.h Tue May 25 09:08:34 2010 +0100
+++ b/xen/include/asm-x86/hvm/hvm.h Tue May 25 10:44:07 2010 +0100
@@ -33,7 +33,8 @@
hvm_intsrc_pic,
hvm_intsrc_lapic,
hvm_intsrc_nmi,
- hvm_intsrc_mce
+ hvm_intsrc_mce,
+ hvm_intsrc_vector
};
struct hvm_intack {
uint8_t source; /* enum hvm_intsrc */
@@ -44,6 +45,7 @@
#define hvm_intack_lapic(vec) ( (struct hvm_intack) { hvm_intsrc_lapic, vec } )
#define hvm_intack_nmi ( (struct hvm_intack) { hvm_intsrc_nmi, 2 } )
#define hvm_intack_mce ( (struct hvm_intack) { hvm_intsrc_mce, 18 } )
+#define hvm_intack_vector(vec)( (struct hvm_intack) { hvm_intsrc_vector, vec }
)
enum hvm_intblk {
hvm_intblk_none, /* not blocked (deliverable) */
hvm_intblk_shadow, /* MOV-SS or STI shadow */
diff -r 12c79a476007 xen/include/asm-x86/hvm/irq.h
--- a/xen/include/asm-x86/hvm/irq.h Tue May 25 09:08:34 2010 +0100
+++ b/xen/include/asm-x86/hvm/irq.h Tue May 25 10:44:07 2010 +0100
@@ -54,12 +54,14 @@
enum {
HVMIRQ_callback_none,
HVMIRQ_callback_gsi,
- HVMIRQ_callback_pci_intx
+ HVMIRQ_callback_pci_intx,
+ HVMIRQ_callback_vector
} callback_via_type;
};
union {
uint32_t gsi;
struct { uint8_t dev, intx; } pci;
+ uint32_t vector;
} callback_via;
/* Number of INTx wires asserting each PCI-ISA link. */
diff -r 12c79a476007 xen/include/public/features.h
--- a/xen/include/public/features.h Tue May 25 09:08:34 2010 +0100
+++ b/xen/include/public/features.h Tue May 25 10:44:07 2010 +0100
@@ -68,6 +68,9 @@
*/
#define XENFEAT_gnttab_map_avail_bits 7
+/* x86: Does this Xen host support the HVM callback vector type? */
+#define XENFEAT_hvm_callback_vector 8
+
/* x86: pvclock algorithm is safe to use on HVM */
#define XENFEAT_hvm_safe_pvclock 9
diff -r 12c79a476007 xen/include/public/hvm/params.h
--- a/xen/include/public/hvm/params.h Tue May 25 09:08:34 2010 +0100
+++ b/xen/include/public/hvm/params.h Tue May 25 10:44:07 2010 +0100
@@ -33,6 +33,9 @@
* val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows:
* Domain = val[47:32], Bus = val[31:16],
* DevFn = val[15: 8], IntX = val[ 1: 0]
+ * val[63:56] == 2: val[7:0] is a vector number, check for
+ * XENFEAT_hvm_callback_vector to know if this delivery
+ * method is available.
* If val == 0 then CPU0 event-channel notifications are not delivered.
*/
#define HVM_PARAM_CALLBACK_IRQ 0
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