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[Qemu-devel] [PATCH v3 15/20] intc/arm_gic: Implement the virtual interf
From: |
Luc Michel |
Subject: |
[Qemu-devel] [PATCH v3 15/20] intc/arm_gic: Implement the virtual interface registers |
Date: |
Fri, 29 Jun 2018 15:29:49 +0200 |
Implement the read and write functions for the virtual interface of the
virtualization extensions in the GICv2.
Signed-off-by: Luc Michel <address@hidden>
---
hw/intc/arm_gic.c | 161 +++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 159 insertions(+), 2 deletions(-)
diff --git a/hw/intc/arm_gic.c b/hw/intc/arm_gic.c
index 9bbd544a5c..a29042f291 100644
--- a/hw/intc/arm_gic.c
+++ b/hw/intc/arm_gic.c
@@ -1530,6 +1530,163 @@ static MemTxResult gic_do_vcpu_write(void *opaque,
hwaddr addr,
}
+static uint32_t gic_compute_eisr(GICState *s, int cpu, int lr_start)
+{
+ int lr_idx;
+ uint32_t ret = 0;
+
+ for (lr_idx = lr_start; lr_idx < s->num_lrs; lr_idx++) {
+ uint32_t *entry = &s->h_lr[lr_idx][cpu];
+ ret = deposit32(ret, lr_idx - lr_start, 1,
+ gic_lr_entry_is_eoi(*entry));
+ }
+
+ return ret;
+}
+
+static uint32_t gic_compute_elrsr(GICState *s, int cpu, int lr_start)
+{
+ int lr_idx;
+ uint32_t ret = 0;
+
+ for (lr_idx = lr_start; lr_idx < s->num_lrs; lr_idx++) {
+ uint32_t *entry = &s->h_lr[lr_idx][cpu];
+ ret = deposit32(ret, lr_idx - lr_start, 1,
+ gic_lr_entry_is_free(*entry));
+ }
+
+ return ret;
+}
+
+static void gic_vmcr_write(GICState *s, uint32_t value, MemTxAttrs attrs)
+{
+ int vcpu = gic_get_current_vcpu(s);
+ uint32_t ctlr;
+ uint32_t abpr;
+ uint32_t bpr;
+ uint32_t prio_mask;
+
+ ctlr = FIELD_EX32(value, GICH_VMCR, VMCCtlr);
+ abpr = FIELD_EX32(value, GICH_VMCR, VMABP);
+ bpr = FIELD_EX32(value, GICH_VMCR, VMBP);
+ prio_mask = FIELD_EX32(value, GICH_VMCR, VMPriMask) << 3;
+
+ gic_set_cpu_control(s, vcpu, ctlr, attrs);
+ s->abpr[vcpu] = MAX(abpr, GIC_VIRT_MIN_ABPR);
+ s->bpr[vcpu] = MAX(bpr, GIC_VIRT_MIN_BPR);
+ gic_set_priority_mask(s, vcpu, prio_mask, attrs);
+}
+
+static MemTxResult gic_hyp_read(void *opaque, hwaddr addr, uint64_t *data,
+ unsigned size, MemTxAttrs attrs)
+{
+ GICState *s = ARM_GIC(opaque);
+ int cpu = gic_get_current_cpu(s);
+ int vcpu = gic_get_current_vcpu(s);
+
+ switch (addr) {
+ case A_GICH_HCR: /* Hypervisor Control */
+ *data = s->h_hcr[cpu];
+ break;
+
+ case A_GICH_VTR: /* VGIC Type */
+ *data = FIELD_DP32(0, GICH_VTR, ListRegs, s->num_lrs - 1);
+ *data = FIELD_DP32(*data, GICH_VTR, PREbits,
+ GIC_VIRT_MAX_GROUP_PRIO_BITS - 1);
+ *data = FIELD_DP32(*data, GICH_VTR, PRIbits,
+ (7 - GIC_VIRT_MIN_BPR) - 1);
+ break;
+
+ case A_GICH_VMCR: /* Virtual Machine Control */
+ *data = FIELD_DP32(0, GICH_VMCR, VMCCtlr,
+ extract32(s->cpu_ctlr[vcpu], 0, 10));
+ *data = FIELD_DP32(*data, GICH_VMCR, VMABP, s->abpr[vcpu]);
+ *data = FIELD_DP32(*data, GICH_VMCR, VMBP, s->bpr[vcpu]);
+ *data = FIELD_DP32(*data, GICH_VMCR, VMPriMask,
+ extract32(s->priority_mask[vcpu], 3, 5));
+ break;
+
+ case A_GICH_MISR: /* Maintenance Interrupt Status */
+ *data = s->h_misr[cpu];
+ break;
+
+ case A_GICH_EISR0: /* End of Interrupt Status 0 and 1 */
+ case A_GICH_EISR1:
+ *data = gic_compute_eisr(s, cpu, (addr - A_GICH_EISR0) * 8);
+ break;
+
+ case A_GICH_ELRSR0: /* Empty List Status 0 and 1 */
+ case A_GICH_ELRSR1:
+ *data = gic_compute_elrsr(s, cpu, (addr - A_GICH_ELRSR0) * 8);
+ break;
+
+ case A_GICH_APR: /* Active Priorities */
+ *data = s->h_apr[cpu];
+ break;
+
+ case A_GICH_LR0 ... A_GICH_LR63: /* List Registers */
+ {
+ int lr_idx = (addr - A_GICH_LR0) / 4;
+
+ if (lr_idx > s->num_lrs) {
+ *data = 0;
+ } else {
+ *data = s->h_lr[lr_idx][cpu];
+ }
+ break;
+ }
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "gic_hyp_read: Bad offset %" HWADDR_PRIx "\n", addr);
+ return MEMTX_OK;
+ }
+
+ return MEMTX_OK;
+}
+
+static MemTxResult gic_hyp_write(void *opaque, hwaddr addr, uint64_t value,
+ unsigned size, MemTxAttrs attrs)
+{
+ GICState *s = ARM_GIC(opaque);
+ int cpu = gic_get_current_cpu(s);
+ int vcpu = gic_get_current_vcpu(s);
+
+ switch (addr) {
+ case A_GICH_HCR: /* Hypervisor Control */
+ s->h_hcr[cpu] = value & GICH_HCR_MASK;
+ break;
+
+ case A_GICH_VMCR: /* Virtual Machine Control */
+ gic_vmcr_write(s, value, attrs);
+ break;
+
+ case A_GICH_APR: /* Active Priorities */
+ s->h_apr[cpu] = value;
+ s->running_priority[vcpu] = gic_get_prio_from_apr_bits(s, vcpu);
+ break;
+
+ case A_GICH_LR0 ... A_GICH_LR63: /* List Registers */
+ {
+ int lr_idx = (addr - A_GICH_LR0) / 4;
+
+ if (lr_idx > s->num_lrs) {
+ return MEMTX_OK;
+ }
+
+ s->h_lr[lr_idx][cpu] = value & GICH_LR_MASK;
+ break;
+ }
+
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "gic_hyp_write: Bad offset %" HWADDR_PRIx "\n", addr);
+ return MEMTX_OK;
+ }
+
+ return MEMTX_OK;
+}
+
static const MemoryRegionOps gic_ops[2] = {
{
.read_with_attrs = gic_dist_read,
@@ -1551,8 +1708,8 @@ static const MemoryRegionOps gic_cpu_ops = {
static const MemoryRegionOps gic_virt_ops[2] = {
{
- .read_with_attrs = NULL,
- .write_with_attrs = NULL,
+ .read_with_attrs = gic_hyp_read,
+ .write_with_attrs = gic_hyp_write,
.endianness = DEVICE_NATIVE_ENDIAN,
},
{
--
2.17.1
- [Qemu-devel] [PATCH v3 00/20] arm_gic: add virtualization extensions support, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 13/20] intc/arm_gic: Implement virtualization extensions in gic_cpu_(read|write), Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 01/20] intc/arm_gic: Implement write to GICD_ISACTIVERn and GICD_ICACTIVERn registers, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 07/20] intc/arm_gic: Add virtualization extensions helper macros and functions, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 10/20] intc/arm_gic: Implement virtualization extensions in gic_(activate_irq|drop_prio), Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 15/20] intc/arm_gic: Implement the virtual interface registers,
Luc Michel <=
- [Qemu-devel] [PATCH v3 03/20] intc/arm_gic: Remove some dead code and put some functions static, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 06/20] intc/arm_gic: Add virtual interface register definitions, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 09/20] intc/arm_gic: Add virtualization enabled IRQ helper functions, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 12/20] intc/arm_gic: Implement virtualization extensions in gic_complete_irq, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 17/20] intc/arm_gic: Implement maintenance interrupt generation, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 11/20] intc/arm_gic: Implement virtualization extensions in gic_acknowledge_irq, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 18/20] intc/arm_gic: Improve traces, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 16/20] intc/arm_gic: Implement gic_update_virt() function, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 02/20] intc/arm_gic: Refactor operations on the distributor, Luc Michel, 2018/06/29
- [Qemu-devel] [PATCH v3 05/20] intc/arm_gic: Add the virtualization extensions to the GIC state, Luc Michel, 2018/06/29