[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [PULL 20/45] intc/arm_gic: Add virtualization enabled IRQ h
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 20/45] intc/arm_gic: Add virtualization enabled IRQ helper functions |
Date: |
Tue, 14 Aug 2018 19:17:50 +0100 |
From: Luc Michel <address@hidden>
Add some helper functions to gic_internal.h to get or change the state
of an IRQ. When the current CPU is not a vCPU, the call is forwarded to
the GIC distributor. Otherwise, it acts on the list register matching
the IRQ in the current CPU virtual interface.
gic_clear_active can have a side effect on the distributor, even in the
vCPU case, when the correponding LR has the HW field set.
Use those functions in the CPU interface code path to prepare for the
vCPU interface implementation.
Signed-off-by: Luc Michel <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
hw/intc/gic_internal.h | 83 ++++++++++++++++++++++++++++++++++++++++++
hw/intc/arm_gic.c | 32 +++++++---------
2 files changed, 97 insertions(+), 18 deletions(-)
diff --git a/hw/intc/gic_internal.h b/hw/intc/gic_internal.h
index cc5acc5d419..45c2af0bf59 100644
--- a/hw/intc/gic_internal.h
+++ b/hw/intc/gic_internal.h
@@ -143,6 +143,13 @@ REG32(GICH_LR63, 0x1fc)
#define GICH_LR_GROUP(entry) (FIELD_EX32(entry, GICH_LR0, Grp1))
#define GICH_LR_HW(entry) (FIELD_EX32(entry, GICH_LR0, HW))
+#define GICH_LR_CLEAR_PENDING(entry) \
+ ((entry) &= ~(GICH_LR_STATE_PENDING << R_GICH_LR0_State_SHIFT))
+#define GICH_LR_SET_ACTIVE(entry) \
+ ((entry) |= (GICH_LR_STATE_ACTIVE << R_GICH_LR0_State_SHIFT))
+#define GICH_LR_CLEAR_ACTIVE(entry) \
+ ((entry) &= ~(GICH_LR_STATE_ACTIVE << R_GICH_LR0_State_SHIFT))
+
/* Valid bits for GICC_CTLR for GICv1, v1 with security extensions,
* GICv2 and GICv2 with security extensions:
*/
@@ -238,4 +245,80 @@ static inline uint32_t *gic_get_lr_entry(GICState *s, int
irq, int vcpu)
g_assert_not_reached();
}
+static inline bool gic_test_group(GICState *s, int irq, int cpu)
+{
+ if (gic_is_vcpu(cpu)) {
+ uint32_t *entry = gic_get_lr_entry(s, irq, cpu);
+ return GICH_LR_GROUP(*entry);
+ } else {
+ return GIC_DIST_TEST_GROUP(irq, 1 << cpu);
+ }
+}
+
+static inline void gic_clear_pending(GICState *s, int irq, int cpu)
+{
+ if (gic_is_vcpu(cpu)) {
+ uint32_t *entry = gic_get_lr_entry(s, irq, cpu);
+ GICH_LR_CLEAR_PENDING(*entry);
+ } else {
+ /* Clear pending state for both level and edge triggered
+ * interrupts. (level triggered interrupts with an active line
+ * remain pending, see gic_test_pending)
+ */
+ GIC_DIST_CLEAR_PENDING(irq, GIC_DIST_TEST_MODEL(irq) ? ALL_CPU_MASK
+ : (1 << cpu));
+ }
+}
+
+static inline void gic_set_active(GICState *s, int irq, int cpu)
+{
+ if (gic_is_vcpu(cpu)) {
+ uint32_t *entry = gic_get_lr_entry(s, irq, cpu);
+ GICH_LR_SET_ACTIVE(*entry);
+ } else {
+ GIC_DIST_SET_ACTIVE(irq, 1 << cpu);
+ }
+}
+
+static inline void gic_clear_active(GICState *s, int irq, int cpu)
+{
+ if (gic_is_vcpu(cpu)) {
+ uint32_t *entry = gic_get_lr_entry(s, irq, cpu);
+ GICH_LR_CLEAR_ACTIVE(*entry);
+
+ if (GICH_LR_HW(*entry)) {
+ /* Hardware interrupt. We must forward the deactivation request to
+ * the distributor.
+ */
+ int phys_irq = GICH_LR_PHYS_ID(*entry);
+ int rcpu = gic_get_vcpu_real_id(cpu);
+
+ if (phys_irq < GIC_NR_SGIS || phys_irq >= GIC_MAXIRQ) {
+ /* UNPREDICTABLE behaviour, we choose to ignore the request */
+ return;
+ }
+
+ /* This is equivalent to a NS write to DIR on the physical CPU
+ * interface. Hence group0 interrupt deactivation is ignored if
+ * the GIC is secure.
+ */
+ if (!s->security_extn || GIC_DIST_TEST_GROUP(phys_irq, 1 << rcpu))
{
+ GIC_DIST_CLEAR_ACTIVE(phys_irq, 1 << rcpu);
+ }
+ }
+ } else {
+ GIC_DIST_CLEAR_ACTIVE(irq, 1 << cpu);
+ }
+}
+
+static inline int gic_get_priority(GICState *s, int irq, int cpu)
+{
+ if (gic_is_vcpu(cpu)) {
+ uint32_t *entry = gic_get_lr_entry(s, irq, cpu);
+ return GICH_LR_PRIORITY(*entry);
+ } else {
+ return GIC_DIST_GET_PRIORITY(irq, cpu);
+ }
+}
+
#endif /* QEMU_ARM_GIC_INTERNAL_H */
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c
index 94d5982e2ac..26ed7ea58ab 100644
--- a/hw/intc/arm_gic.c
+++ b/hw/intc/arm_gic.c
@@ -222,7 +222,8 @@ static uint16_t gic_get_current_pending_irq(GICState *s,
int cpu,
uint16_t pending_irq = s->current_pending[cpu];
if (pending_irq < GIC_MAXIRQ && gic_has_groups(s)) {
- int group = GIC_DIST_TEST_GROUP(pending_irq, (1 << cpu));
+ int group = gic_test_group(s, pending_irq, cpu);
+
/* On a GIC without the security extensions, reading this register
* behaves in the same way as a secure access to a GIC with them.
*/
@@ -253,7 +254,7 @@ static int gic_get_group_priority(GICState *s, int cpu, int
irq)
if (gic_has_groups(s) &&
!(s->cpu_ctlr[cpu] & GICC_CTLR_CBPR) &&
- GIC_DIST_TEST_GROUP(irq, (1 << cpu))) {
+ gic_test_group(s, irq, cpu)) {
bpr = s->abpr[cpu] - 1;
assert(bpr >= 0);
} else {
@@ -266,7 +267,7 @@ static int gic_get_group_priority(GICState *s, int cpu, int
irq)
*/
mask = ~0U << ((bpr & 7) + 1);
- return GIC_DIST_GET_PRIORITY(irq, cpu) & mask;
+ return gic_get_priority(s, irq, cpu) & mask;
}
static void gic_activate_irq(GICState *s, int cpu, int irq)
@@ -279,14 +280,14 @@ static void gic_activate_irq(GICState *s, int cpu, int
irq)
int regno = preemption_level / 32;
int bitno = preemption_level % 32;
- if (gic_has_groups(s) && GIC_DIST_TEST_GROUP(irq, (1 << cpu))) {
+ if (gic_has_groups(s) && gic_test_group(s, irq, cpu)) {
s->nsapr[regno][cpu] |= (1 << bitno);
} else {
s->apr[regno][cpu] |= (1 << bitno);
}
s->running_priority[cpu] = prio;
- GIC_DIST_SET_ACTIVE(irq, 1 << cpu);
+ gic_set_active(s, irq, cpu);
}
static int gic_get_prio_from_apr_bits(GICState *s, int cpu)
@@ -355,7 +356,7 @@ uint32_t gic_acknowledge_irq(GICState *s, int cpu,
MemTxAttrs attrs)
return irq;
}
- if (GIC_DIST_GET_PRIORITY(irq, cpu) >= s->running_priority[cpu]) {
+ if (gic_get_priority(s, irq, cpu) >= s->running_priority[cpu]) {
DPRINTF("ACK, pending interrupt (%d) has insufficient priority\n",
irq);
return 1023;
}
@@ -364,8 +365,7 @@ uint32_t gic_acknowledge_irq(GICState *s, int cpu,
MemTxAttrs attrs)
/* Clear pending flags for both level and edge triggered interrupts.
* Level triggered IRQs will be reasserted once they become inactive.
*/
- GIC_DIST_CLEAR_PENDING(irq, GIC_DIST_TEST_MODEL(irq) ? ALL_CPU_MASK
- : cm);
+ gic_clear_pending(s, irq, cpu);
ret = irq;
} else {
if (irq < GIC_NR_SGIS) {
@@ -377,9 +377,7 @@ uint32_t gic_acknowledge_irq(GICState *s, int cpu,
MemTxAttrs attrs)
src = ctz32(s->sgi_pending[irq][cpu]);
s->sgi_pending[irq][cpu] &= ~(1 << src);
if (s->sgi_pending[irq][cpu] == 0) {
- GIC_DIST_CLEAR_PENDING(irq,
- GIC_DIST_TEST_MODEL(irq) ? ALL_CPU_MASK
- : cm);
+ gic_clear_pending(s, irq, cpu);
}
ret = irq | ((src & 0x7) << 10);
} else {
@@ -387,8 +385,7 @@ uint32_t gic_acknowledge_irq(GICState *s, int cpu,
MemTxAttrs attrs)
* interrupts. (level triggered interrupts with an active line
* remain pending, see gic_test_pending)
*/
- GIC_DIST_CLEAR_PENDING(irq, GIC_DIST_TEST_MODEL(irq) ? ALL_CPU_MASK
- : cm);
+ gic_clear_pending(s, irq, cpu);
ret = irq;
}
}
@@ -544,7 +541,6 @@ static bool gic_eoi_split(GICState *s, int cpu, MemTxAttrs
attrs)
static void gic_deactivate_irq(GICState *s, int cpu, int irq, MemTxAttrs attrs)
{
- int cm = 1 << cpu;
int group;
if (irq >= s->num_irq) {
@@ -559,7 +555,7 @@ static void gic_deactivate_irq(GICState *s, int cpu, int
irq, MemTxAttrs attrs)
return;
}
- group = gic_has_groups(s) && GIC_DIST_TEST_GROUP(irq, cm);
+ group = gic_has_groups(s) && gic_test_group(s, irq, cpu);
if (!gic_eoi_split(s, cpu, attrs)) {
/* This is UNPREDICTABLE; we choose to ignore it */
@@ -573,7 +569,7 @@ static void gic_deactivate_irq(GICState *s, int cpu, int
irq, MemTxAttrs attrs)
return;
}
- GIC_DIST_CLEAR_ACTIVE(irq, cm);
+ gic_clear_active(s, irq, cpu);
}
static void gic_complete_irq(GICState *s, int cpu, int irq, MemTxAttrs attrs)
@@ -608,7 +604,7 @@ static void gic_complete_irq(GICState *s, int cpu, int irq,
MemTxAttrs attrs)
}
}
- group = gic_has_groups(s) && GIC_DIST_TEST_GROUP(irq, cm);
+ group = gic_has_groups(s) && gic_test_group(s, irq, cpu);
if (gic_cpu_ns_access(s, cpu, attrs) && !group) {
DPRINTF("Non-secure EOI for Group0 interrupt %d ignored\n", irq);
@@ -624,7 +620,7 @@ static void gic_complete_irq(GICState *s, int cpu, int irq,
MemTxAttrs attrs)
/* In GICv2 the guest can choose to split priority-drop and deactivate */
if (!gic_eoi_split(s, cpu, attrs)) {
- GIC_DIST_CLEAR_ACTIVE(irq, cm);
+ gic_clear_active(s, irq, cpu);
}
gic_update(s);
}
--
2.18.0
- [Qemu-devel] [PULL 22/45] intc/arm_gic: Implement virtualization extensions in gic_acknowledge_irq, (continued)
- [Qemu-devel] [PULL 22/45] intc/arm_gic: Implement virtualization extensions in gic_acknowledge_irq, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 19/45] intc/arm_gic: Refactor secure/ns access check in the CPU interface, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 24/45] intc/arm_gic: Implement virtualization extensions in gic_cpu_(read|write), Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 31/45] arm/virt: Add support for GICv2 virtualization extensions, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 32/45] arm: Fix return code of arm_load_elf, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 34/45] target/arm: Honour HCR_EL2.TGE and MDCR_EL2.TDE in debug register access checks, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 38/45] target/arm: Improve exception-taken logging, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 39/45] target/arm: Initialize exc_secure correctly in do_v7m_exception_exit(), Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 41/45] target/arm: Implement tailchaining for M profile cores, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 45/45] target/arm: Fix typo in helper_sve_movz_d, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 20/45] intc/arm_gic: Add virtualization enabled IRQ helper functions,
Peter Maydell <=
- [Qemu-devel] [PULL 21/45] intc/arm_gic: Implement virtualization extensions in gic_(activate_irq|drop_prio), Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 42/45] target/arm: Fix sign of sve_cmpeq_ppzw/sve_cmpne_ppzw, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 27/45] intc/arm_gic: Implement gic_update_virt() function, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 44/45] target/arm: Reorganize SVE WHILE, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 05/45] accel/tcg: Pass read access type through to io_readx(), Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 02/45] nvic: Handle ARMv6-M SCS reserved registers, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 09/45] accel/tcg: Return -1 for execution from MMIO regions in get_page_addr_code(), Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 17/45] intc/arm_gic: Add virtual interface register definitions, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 18/45] intc/arm_gic: Add virtualization extensions helper macros and functions, Peter Maydell, 2018/08/14
- [Qemu-devel] [PULL 23/45] intc/arm_gic: Implement virtualization extensions in gic_(deactivate|complete_irq), Peter Maydell, 2018/08/14