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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [IA64] Create a vlsapic - viosapic interface
# HG changeset patch
# User Alex Williamson <alex.williamson@xxxxxx>
# Date 1204919066 25200
# Node ID d5bcf03596ccdc56828ffd3de1d86ff62d774ade
# Parent 54c7e3798464dfa2e2ba1d725126cceaf935155b
[IA64] Create a vlsapic - viosapic interface
This patch removes duplicated code and create a vlsapic function to
inject any interruption. Slightly simplifies vlsapic.
It also removes useless irq_save/restore around atomic updates.
Signed-off-by: Tristan Gingold <tgingold@xxxxxxx>
---
xen/arch/ia64/vmx/viosapic.c | 34 ++------------
xen/arch/ia64/vmx/vlsapic.c | 99 +++++++++++++++++++++--------------------
xen/include/asm-ia64/vlsapic.h | 6 +-
3 files changed, 62 insertions(+), 77 deletions(-)
diff -r 54c7e3798464 -r d5bcf03596cc xen/arch/ia64/vmx/viosapic.c
--- a/xen/arch/ia64/vmx/viosapic.c Fri Mar 07 12:26:27 2008 -0700
+++ b/xen/arch/ia64/vmx/viosapic.c Fri Mar 07 12:44:26 2008 -0700
@@ -49,36 +49,14 @@ static void viosapic_deliver(struct vios
uint16_t dest = viosapic->redirtbl[irq].dest_id;
uint8_t delivery_mode = viosapic->redirtbl[irq].delivery_mode;
uint8_t vector = viosapic->redirtbl[irq].vector;
- struct vcpu *v;
ASSERT(spin_is_locked(&viosapic->lock));
- switch ( delivery_mode )
- {
- case SAPIC_FIXED:
- {
- v = vlsapic_lid_to_vcpu(viosapic_domain(viosapic), dest);
- vlsapic_set_irq(v, vector);
- vcpu_kick(v);
- break;
- }
- case SAPIC_LOWEST_PRIORITY:
- {
- v = vlsapic_lid_to_vcpu(viosapic_domain(viosapic), dest);
- if (viosapic->lowest_vcpu)
- v = viosapic->lowest_vcpu;
- vlsapic_set_irq(v, vector);
- vcpu_kick(v);
- break;
- }
- case SAPIC_PMI:
- case SAPIC_NMI:
- case SAPIC_INIT:
- case SAPIC_EXTINT:
- default:
- gdprintk(XENLOG_WARNING, "Unsupported delivery mode %d\n",
- delivery_mode);
- break;
- }
+
+ if (vlsapic_deliver_int(viosapic_domain (viosapic),
+ dest, delivery_mode, vector) < 0)
+ gdprintk(XENLOG_WARNING,
+ "viosapic: can't deliver int %u to %u (dm=%u)\n",
+ vector, dest, delivery_mode);
}
diff -r 54c7e3798464 -r d5bcf03596cc xen/arch/ia64/vmx/vlsapic.c
--- a/xen/arch/ia64/vmx/vlsapic.c Fri Mar 07 12:26:27 2008 -0700
+++ b/xen/arch/ia64/vmx/vlsapic.c Fri Mar 07 12:44:26 2008 -0700
@@ -107,7 +107,6 @@ static void update_vhpi(VCPU *vcpu, int
*/
static int vmx_vcpu_unpend_interrupt(VCPU *vcpu, uint8_t vector)
{
- uint64_t spsr;
int ret;
if (vector & ~0xff) {
@@ -115,9 +114,7 @@ static int vmx_vcpu_unpend_interrupt(VCP
return -1;
}
- local_irq_save(spsr);
ret = test_and_clear_bit(vector, &VCPU(vcpu, irr[0]));
- local_irq_restore(spsr);
if (ret) {
vcpu->arch.irq_new_pending = 1;
@@ -422,16 +419,13 @@ static int irq_masked(VCPU *vcpu, int h_
*/
int vmx_vcpu_pend_interrupt(VCPU *vcpu, uint8_t vector)
{
- uint64_t spsr;
int ret;
if (vector & ~0xff) {
gdprintk(XENLOG_INFO, "vmx_vcpu_pend_interrupt: bad vector\n");
return -1;
}
- local_irq_save(spsr);
ret = test_and_set_bit(vector, &VCPU(vcpu, irr[0]));
- local_irq_restore(spsr);
if (!ret) {
vcpu->arch.irq_new_pending = 1;
@@ -605,16 +599,15 @@ void vmx_vexirq(VCPU *vcpu)
generate_exirq (vcpu);
}
-struct vcpu * vlsapic_lid_to_vcpu(struct domain *d, uint16_t dest)
-{
- struct vcpu * v;
- for_each_vcpu ( d, v ) {
- if ( (v->arch.privregs->lid >> 16) == dest )
- return v;
- }
+struct vcpu *lid_to_vcpu(struct domain *d, uint16_t dest)
+{
+ int id = dest >> 8;
+
+ /* Fast look: assume EID=0 ID=vcpu_id. */
+ if ((dest & 0xff) == 0 && id < MAX_VIRT_CPUS)
+ return d->vcpu[id];
return NULL;
}
-
/*
* To inject INIT to guest, we must set the PAL_INIT entry
@@ -641,14 +634,25 @@ static void vmx_inject_guest_pal_init(VC
* offset: address offset to IPI space.
* value: deliver value.
*/
-static void vlsapic_deliver_ipi(VCPU *vcpu, uint64_t dm, uint64_t vector)
-{
- IPI_DPRINTK("deliver_ipi %lx %lx\n", dm, vector);
+static int vcpu_deliver_int(VCPU *vcpu, uint64_t dm, uint64_t vector)
+{
+ int running = vcpu->is_running;
+
+ IPI_DPRINTK("deliver_int %lx %lx\n", dm, vector);
switch (dm) {
case SAPIC_FIXED: // INT
vmx_vcpu_pend_interrupt(vcpu, vector);
break;
+ case SAPIC_LOWEST_PRIORITY:
+ {
+ struct vcpu *lowest = vcpu_viosapic(vcpu)->lowest_vcpu;
+
+ if (lowest == NULL)
+ lowest = vcpu;
+ vmx_vcpu_pend_interrupt(lowest, vector);
+ break;
+ }
case SAPIC_PMI:
// TODO -- inject guest PMI
panic_domain(NULL, "Inject guest PMI!\n");
@@ -663,9 +667,30 @@ static void vlsapic_deliver_ipi(VCPU *vc
vmx_vcpu_pend_interrupt(vcpu, 0);
break;
default:
- panic_domain(NULL, "Deliver reserved IPI!\n");
- break;
- }
+ return -EINVAL;
+ }
+
+ /* Kick vcpu. */
+ vcpu_unblock(vcpu);
+ if (running)
+ smp_send_event_check_cpu(vcpu->processor);
+
+ return 0;
+}
+
+int vlsapic_deliver_int(struct domain *d,
+ uint16_t dest, uint64_t dm, uint64_t vector)
+{
+ VCPU *vcpu;
+
+ vcpu = lid_to_vcpu(d, dest);
+ if (vcpu == NULL)
+ return -ESRCH;
+
+ if (!vcpu->is_initialised || test_bit(_VPF_down, &vcpu->pause_flags))
+ return -ENOEXEC;
+
+ return vcpu_deliver_int (vcpu, dm, vector);
}
/*
@@ -673,25 +698,8 @@ static void vlsapic_deliver_ipi(VCPU *vc
*/
void deliver_pal_init(VCPU *vcpu)
{
- vlsapic_deliver_ipi(vcpu, SAPIC_INIT, 0);
-}
-
-/*
- * TODO: Use hash table for the lookup.
- */
-static inline VCPU *lid_to_vcpu(struct domain *d, uint8_t id, uint8_t eid)
-{
- VCPU *v;
- LID lid;
-
- for_each_vcpu(d, v) {
- lid.val = VCPU_LID(v);
- if (lid.id == id && lid.eid == eid)
- return v;
- }
- return NULL;
-}
-
+ vcpu_deliver_int(vcpu, SAPIC_INIT, 0);
+}
/*
* execute write IPI op.
@@ -701,7 +709,8 @@ static void vlsapic_write_ipi(VCPU *vcpu
VCPU *targ;
struct domain *d = vcpu->domain;
- targ = lid_to_vcpu(vcpu->domain, ((ipi_a_t)addr).id, ((ipi_a_t)addr).eid);
+ targ = lid_to_vcpu(vcpu->domain,
+ (((ipi_a_t)addr).id << 8) | ((ipi_a_t)addr).eid);
if (targ == NULL)
panic_domain(NULL, "Unknown IPI cpu\n");
@@ -727,12 +736,10 @@ static void vlsapic_write_ipi(VCPU *vcpu
printk("arch_boot_vcpu: huh, already awake!");
}
} else {
- int running = targ->is_running;
- vlsapic_deliver_ipi(targ, ((ipi_d_t)value).dm,
- ((ipi_d_t)value).vector);
- vcpu_unblock(targ);
- if (running)
- smp_send_event_check_cpu(targ->processor);
+ if (((ipi_d_t)value).dm == SAPIC_LOWEST_PRIORITY ||
+ vcpu_deliver_int(targ, ((ipi_d_t)value).dm,
+ ((ipi_d_t)value).vector) < 0)
+ panic_domain(NULL, "Deliver reserved interrupt!\n");
}
return;
}
diff -r 54c7e3798464 -r d5bcf03596cc xen/include/asm-ia64/vlsapic.h
--- a/xen/include/asm-ia64/vlsapic.h Fri Mar 07 12:26:27 2008 -0700
+++ b/xen/include/asm-ia64/vlsapic.h Fri Mar 07 12:44:26 2008 -0700
@@ -70,9 +70,9 @@ extern void vtm_set_itv(struct vcpu *vcp
extern void vtm_set_itv(struct vcpu *vcpu, uint64_t val);
extern void vmx_vexirq(struct vcpu *vcpu);
extern void vhpi_detection(struct vcpu *vcpu);
-extern int vmx_vcpu_pend_interrupt(VCPU * vcpu, uint8_t vector);
-extern struct vcpu * vlsapic_lid_to_vcpu(struct domain *d, uint16_t dest);
+extern int vlsapic_deliver_int(struct domain *d,
+ uint16_t dest, uint64_t dm, uint64_t vector);
+
extern uint64_t vlsapic_read(struct vcpu *v, uint64_t addr, uint64_t s);
extern void vlsapic_write(struct vcpu *v, uint64_t addr, uint64_t s, uint64_t
val);
-#define vlsapic_set_irq vmx_vcpu_pend_interrupt
#endif
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