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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] x86 hvm: Clean up VLAPIC interfaces a little, and fix vlapic_ipi().
# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1251712472 -3600
# Node ID 3b7cbf32fee909d860daacf70b8c3b97eaf036b5
# Parent 843835ef0fc18e2b35d4212399e4efdd7c44258b
x86 hvm: Clean up VLAPIC interfaces a little, and fix vlapic_ipi().
A boolean flag was overflowing a uint8_t.
Thanks to Dongxiao Xu at Intel for tracking down the bug.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
xen/arch/x86/hvm/vlapic.c | 63 +++++++++++++---------------------------------
xen/arch/x86/hvm/vmsi.c | 7 +----
2 files changed, 20 insertions(+), 50 deletions(-)
diff -r 843835ef0fc1 -r 3b7cbf32fee9 xen/arch/x86/hvm/vlapic.c
--- a/xen/arch/x86/hvm/vlapic.c Mon Aug 31 10:17:09 2009 +0100
+++ b/xen/arch/x86/hvm/vlapic.c Mon Aug 31 10:54:32 2009 +0100
@@ -296,35 +296,19 @@ static int vlapic_accept_sipi(struct vcp
}
/* Add a pending IRQ into lapic. */
-static int vlapic_accept_irq(struct vcpu *v, int delivery_mode,
- int vector, int level, int trig_mode)
+static int vlapic_accept_irq(struct vcpu *v, uint32_t icr_low)
{
struct vlapic *vlapic = vcpu_vlapic(v);
+ uint8_t vector = (uint8_t)icr_low;
int rc = X86EMUL_OKAY;
- switch ( delivery_mode )
+ switch ( icr_low & APIC_MODE_MASK )
{
case APIC_DM_FIXED:
case APIC_DM_LOWEST:
- /* FIXME add logic for vcpu on reset */
- if ( unlikely(!vlapic_enabled(vlapic)) )
- break;
-
- if ( vlapic_test_and_set_irr(vector, vlapic) && trig_mode )
- {
- HVM_DBG_LOG(DBG_LEVEL_VLAPIC,
- "level trig mode repeatedly for vector %d", vector);
- break;
- }
-
- if ( trig_mode )
- {
- HVM_DBG_LOG(DBG_LEVEL_VLAPIC,
- "level trig mode for vector %d", vector);
- vlapic_set_vector(vector, &vlapic->regs->data[APIC_TMR]);
- }
-
- vcpu_kick(v);
+ if ( vlapic_enabled(vlapic) &&
+ !vlapic_test_and_set_irr(vector, vlapic) )
+ vcpu_kick(v);
break;
case APIC_DM_REMRD:
@@ -342,7 +326,8 @@ static int vlapic_accept_irq(struct vcpu
case APIC_DM_INIT:
/* No work on INIT de-assert for P4-type APIC. */
- if ( trig_mode && !(level & APIC_INT_ASSERT) )
+ if ( (icr_low & (APIC_INT_LEVELTRIG | APIC_INT_ASSERT)) ==
+ APIC_INT_LEVELTRIG )
break;
rc = vlapic_accept_init(v);
break;
@@ -352,8 +337,8 @@ static int vlapic_accept_irq(struct vcpu
break;
default:
- gdprintk(XENLOG_ERR, "TODO: unsupported delivery mode %x\n",
- delivery_mode);
+ gdprintk(XENLOG_ERR, "TODO: unsupported delivery mode in ICR %x\n",
+ icr_low);
domain_crash(v->domain);
}
@@ -410,31 +395,21 @@ int vlapic_ipi(
int vlapic_ipi(
struct vlapic *vlapic, uint32_t icr_low, uint32_t icr_high)
{
- unsigned int dest = GET_xAPIC_DEST_FIELD(icr_high);
- unsigned int short_hand = icr_low & APIC_SHORT_MASK;
- unsigned int trig_mode = icr_low & APIC_INT_LEVELTRIG;
- unsigned int level = icr_low & APIC_INT_ASSERT;
- unsigned int dest_mode = icr_low & APIC_DEST_MASK;
- unsigned int delivery_mode =icr_low & APIC_MODE_MASK;
- unsigned int vector = icr_low & APIC_VECTOR_MASK;
-
+ unsigned int dest = GET_xAPIC_DEST_FIELD(icr_high);
+ unsigned int short_hand = icr_low & APIC_SHORT_MASK;
+ unsigned int dest_mode = !!(icr_low & APIC_DEST_MASK);
struct vlapic *target;
struct vcpu *v;
int rc = X86EMUL_OKAY;
- HVM_DBG_LOG(DBG_LEVEL_VLAPIC, "icr_high 0x%x, icr_low 0x%x, "
- "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, "
- "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x",
- icr_high, icr_low, short_hand, dest,
- trig_mode, level, dest_mode, delivery_mode, vector);
-
- if ( delivery_mode == APIC_DM_LOWEST )
+ HVM_DBG_LOG(DBG_LEVEL_VLAPIC, "icr = 0x%08x:%08x", icr_high, icr_low);
+
+ if ( (icr_low & APIC_MODE_MASK) == APIC_DM_LOWEST )
{
target = vlapic_lowest_prio(vlapic_domain(vlapic), vlapic,
short_hand, dest, dest_mode);
if ( target != NULL )
- rc = vlapic_accept_irq(vlapic_vcpu(target), delivery_mode,
- vector, level, trig_mode);
+ rc = vlapic_accept_irq(vlapic_vcpu(target), icr_low);
return rc;
}
@@ -442,9 +417,7 @@ int vlapic_ipi(
{
if ( vlapic_match_dest(vcpu_vlapic(v), vlapic,
short_hand, dest, dest_mode) )
- rc = vlapic_accept_irq(v, delivery_mode,
- vector, level, trig_mode);
-
+ rc = vlapic_accept_irq(v, icr_low);
if ( rc != X86EMUL_OKAY )
break;
}
diff -r 843835ef0fc1 -r 3b7cbf32fee9 xen/arch/x86/hvm/vmsi.c
--- a/xen/arch/x86/hvm/vmsi.c Mon Aug 31 10:17:09 2009 +0100
+++ b/xen/arch/x86/hvm/vmsi.c Mon Aug 31 10:54:32 2009 +0100
@@ -64,15 +64,12 @@ static void vmsi_inj_irq(
}
}
-#define VMSI_DEST_ID_MASK 0xff
#define VMSI_RH_MASK 0x100
#define VMSI_DM_MASK 0x200
#define VMSI_DELIV_MASK 0x7000
#define VMSI_TRIG_MODE 0x8000
-#define GFLAGS_SHIFT_DEST_ID 0
#define GFLAGS_SHIFT_RH 8
-#define GFLAGS_SHIFT_DM 9
#define GLFAGS_SHIFT_DELIV_MODE 12
#define GLFAGS_SHIFT_TRG_MODE 15
@@ -81,8 +78,8 @@ int vmsi_deliver(struct domain *d, int p
struct hvm_irq_dpci *hvm_irq_dpci = d->arch.hvm_domain.irq.dpci;
uint32_t flags = hvm_irq_dpci->mirq[pirq].gmsi.gflags;
int vector = hvm_irq_dpci->mirq[pirq].gmsi.gvec;
- uint16_t dest = (flags & VMSI_DEST_ID_MASK) >> GFLAGS_SHIFT_DEST_ID;
- uint8_t dest_mode = (flags & VMSI_DM_MASK) >> GFLAGS_SHIFT_DM;
+ uint8_t dest = (uint8_t)flags;
+ uint8_t dest_mode = !!(flags & VMSI_DM_MASK);
uint8_t delivery_mode = (flags & VMSI_DELIV_MASK) >>
GLFAGS_SHIFT_DELIV_MODE;
uint8_t trig_mode = (flags & VMSI_TRIG_MODE) >> GLFAGS_SHIFT_TRG_MODE;
struct vlapic *target;
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