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qemu-e2k/hw/intc/arm_gicv3_kvm.c
Peter Maydell e5cba10ee1 hw/intc/arm_gicv3: Support multiple redistributor regions 
Our GICv3 QOM interface includes an array property
redist-region-count which allows board models to specify that the
registributor registers are not in a single contiguous range, but
split into multiple pieces.  We implemented this for KVM, but
currently the TCG GICv3 model insists that there is only one region.
You can see the limit being hit with a setup like:
  qemu-system-aarch64 -machine virt,gic-version=3 -smp 124

Add support for split regions to the TCG GICv3.  To do this we switch
from allocating a simple array of MemoryRegions to an array of
GICv3RedistRegion structs so that we can use the GICv3RedistRegion as
the opaque pointer in the MemoryRegion read/write callbacks.  Each
GICv3RedistRegion contains the MemoryRegion, a backpointer allowing
the read/write callback to get hold of the GICv3State, and an index
which allows us to calculate which CPU's redistributor is being
accessed.

Note that arm_gicv3_kvm always passes in NULL as the ops argument
to gicv3_init_irqs_and_mmio(), so the only MemoryRegion read/write
callbacks we need to update to handle this new scheme are the
gicv3_redist_read/write functions used by the emulated GICv3.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-11-15 16:12:59 +00:00

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/*
* ARM Generic Interrupt Controller using KVM in-kernel support
*
* Copyright (c) 2015 Samsung Electronics Co., Ltd.
* Written by Pavel Fedin
* Based on vGICv2 code by Peter Maydell
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/intc/arm_gicv3_common.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "sysemu/kvm.h"
#include "sysemu/runstate.h"
#include "kvm_arm.h"
#include "gicv3_internal.h"
#include "vgic_common.h"
#include "migration/blocker.h"
#include "qom/object.h"
#ifdef DEBUG_GICV3_KVM
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, "kvm_gicv3: " fmt, ## __VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do { } while (0)
#endif
#define TYPE_KVM_ARM_GICV3 "kvm-arm-gicv3"
typedef struct KVMARMGICv3Class KVMARMGICv3Class;
/* This is reusing the GICv3State typedef from ARM_GICV3_ITS_COMMON */
DECLARE_OBJ_CHECKERS(GICv3State, KVMARMGICv3Class,
KVM_ARM_GICV3, TYPE_KVM_ARM_GICV3)
#define KVM_DEV_ARM_VGIC_SYSREG(op0, op1, crn, crm, op2) \
(ARM64_SYS_REG_SHIFT_MASK(op0, OP0) | \
ARM64_SYS_REG_SHIFT_MASK(op1, OP1) | \
ARM64_SYS_REG_SHIFT_MASK(crn, CRN) | \
ARM64_SYS_REG_SHIFT_MASK(crm, CRM) | \
ARM64_SYS_REG_SHIFT_MASK(op2, OP2))
#define ICC_PMR_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 4, 6, 0)
#define ICC_BPR0_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 8, 3)
#define ICC_AP0R_EL1(n) \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 8, 4 | n)
#define ICC_AP1R_EL1(n) \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 9, n)
#define ICC_BPR1_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 3)
#define ICC_CTLR_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 4)
#define ICC_SRE_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 5)
#define ICC_IGRPEN0_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 6)
#define ICC_IGRPEN1_EL1 \
KVM_DEV_ARM_VGIC_SYSREG(3, 0, 12, 12, 7)
struct KVMARMGICv3Class {
ARMGICv3CommonClass parent_class;
DeviceRealize parent_realize;
void (*parent_reset)(DeviceState *dev);
};
static void kvm_arm_gicv3_set_irq(void *opaque, int irq, int level)
{
GICv3State *s = (GICv3State *)opaque;
kvm_arm_gic_set_irq(s->num_irq, irq, level);
}
#define KVM_VGIC_ATTR(reg, typer) \
((typer & KVM_DEV_ARM_VGIC_V3_MPIDR_MASK) | (reg))
static inline void kvm_gicd_access(GICv3State *s, int offset,
uint32_t *val, bool write)
{
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_DIST_REGS,
KVM_VGIC_ATTR(offset, 0),
val, write, &error_abort);
}
static inline void kvm_gicr_access(GICv3State *s, int offset, int cpu,
uint32_t *val, bool write)
{
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_REDIST_REGS,
KVM_VGIC_ATTR(offset, s->cpu[cpu].gicr_typer),
val, write, &error_abort);
}
static inline void kvm_gicc_access(GICv3State *s, uint64_t reg, int cpu,
uint64_t *val, bool write)
{
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS,
KVM_VGIC_ATTR(reg, s->cpu[cpu].gicr_typer),
val, write, &error_abort);
}
static inline void kvm_gic_line_level_access(GICv3State *s, int irq, int cpu,
uint32_t *val, bool write)
{
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_LEVEL_INFO,
KVM_VGIC_ATTR(irq, s->cpu[cpu].gicr_typer) |
(VGIC_LEVEL_INFO_LINE_LEVEL <<
KVM_DEV_ARM_VGIC_LINE_LEVEL_INFO_SHIFT),
val, write, &error_abort);
}
/* Loop through each distributor IRQ related register; since bits
* corresponding to SPIs and PPIs are RAZ/WI when affinity routing
* is enabled, we skip those.
*/
#define for_each_dist_irq_reg(_irq, _max, _field_width) \
for (_irq = GIC_INTERNAL; _irq < _max; _irq += (32 / _field_width))
static void kvm_dist_get_priority(GICv3State *s, uint32_t offset, uint8_t *bmp)
{
uint32_t reg, *field;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the first 8
* GICD_IPRIORITYR<n> registers are always RAZ/WI. The corresponding
* functionality is replaced by GICR_IPRIORITYR<n>. It doesn't need to
* sync them. So it needs to skip the field of GIC_INTERNAL irqs in bmp and
* offset.
*/
field = (uint32_t *)(bmp + GIC_INTERNAL);
offset += (GIC_INTERNAL * 8) / 8;
for_each_dist_irq_reg(irq, s->num_irq, 8) {
kvm_gicd_access(s, offset, &reg, false);
*field = reg;
offset += 4;
field++;
}
}
static void kvm_dist_put_priority(GICv3State *s, uint32_t offset, uint8_t *bmp)
{
uint32_t reg, *field;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the first 8
* GICD_IPRIORITYR<n> registers are always RAZ/WI. The corresponding
* functionality is replaced by GICR_IPRIORITYR<n>. It doesn't need to
* sync them. So it needs to skip the field of GIC_INTERNAL irqs in bmp and
* offset.
*/
field = (uint32_t *)(bmp + GIC_INTERNAL);
offset += (GIC_INTERNAL * 8) / 8;
for_each_dist_irq_reg(irq, s->num_irq, 8) {
reg = *field;
kvm_gicd_access(s, offset, &reg, true);
offset += 4;
field++;
}
}
static void kvm_dist_get_edge_trigger(GICv3State *s, uint32_t offset,
uint32_t *bmp)
{
uint32_t reg;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the first 2
* GICD_ICFGR<n> registers are always RAZ/WI. The corresponding
* functionality is replaced by GICR_ICFGR<n>. It doesn't need to sync
* them. So it should increase the offset to skip GIC_INTERNAL irqs.
* This matches the for_each_dist_irq_reg() macro which also skips the
* first GIC_INTERNAL irqs.
*/
offset += (GIC_INTERNAL * 2) / 8;
for_each_dist_irq_reg(irq, s->num_irq, 2) {
kvm_gicd_access(s, offset, &reg, false);
reg = half_unshuffle32(reg >> 1);
if (irq % 32 != 0) {
reg = (reg << 16);
}
*gic_bmp_ptr32(bmp, irq) |= reg;
offset += 4;
}
}
static void kvm_dist_put_edge_trigger(GICv3State *s, uint32_t offset,
uint32_t *bmp)
{
uint32_t reg;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the first 2
* GICD_ICFGR<n> registers are always RAZ/WI. The corresponding
* functionality is replaced by GICR_ICFGR<n>. It doesn't need to sync
* them. So it should increase the offset to skip GIC_INTERNAL irqs.
* This matches the for_each_dist_irq_reg() macro which also skips the
* first GIC_INTERNAL irqs.
*/
offset += (GIC_INTERNAL * 2) / 8;
for_each_dist_irq_reg(irq, s->num_irq, 2) {
reg = *gic_bmp_ptr32(bmp, irq);
if (irq % 32 != 0) {
reg = (reg & 0xffff0000) >> 16;
} else {
reg = reg & 0xffff;
}
reg = half_shuffle32(reg) << 1;
kvm_gicd_access(s, offset, &reg, true);
offset += 4;
}
}
static void kvm_gic_get_line_level_bmp(GICv3State *s, uint32_t *bmp)
{
uint32_t reg;
int irq;
for_each_dist_irq_reg(irq, s->num_irq, 1) {
kvm_gic_line_level_access(s, irq, 0, &reg, false);
*gic_bmp_ptr32(bmp, irq) = reg;
}
}
static void kvm_gic_put_line_level_bmp(GICv3State *s, uint32_t *bmp)
{
uint32_t reg;
int irq;
for_each_dist_irq_reg(irq, s->num_irq, 1) {
reg = *gic_bmp_ptr32(bmp, irq);
kvm_gic_line_level_access(s, irq, 0, &reg, true);
}
}
/* Read a bitmap register group from the kernel VGIC. */
static void kvm_dist_getbmp(GICv3State *s, uint32_t offset, uint32_t *bmp)
{
uint32_t reg;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the
* GICD_IGROUPR0/GICD_IGRPMODR0/GICD_ISENABLER0/GICD_ISPENDR0/
* GICD_ISACTIVER0 registers are always RAZ/WI. The corresponding
* functionality is replaced by the GICR registers. It doesn't need to sync
* them. So it should increase the offset to skip GIC_INTERNAL irqs.
* This matches the for_each_dist_irq_reg() macro which also skips the
* first GIC_INTERNAL irqs.
*/
offset += (GIC_INTERNAL * 1) / 8;
for_each_dist_irq_reg(irq, s->num_irq, 1) {
kvm_gicd_access(s, offset, &reg, false);
*gic_bmp_ptr32(bmp, irq) = reg;
offset += 4;
}
}
static void kvm_dist_putbmp(GICv3State *s, uint32_t offset,
uint32_t clroffset, uint32_t *bmp)
{
uint32_t reg;
int irq;
/* For the KVM GICv3, affinity routing is always enabled, and the
* GICD_IGROUPR0/GICD_IGRPMODR0/GICD_ISENABLER0/GICD_ISPENDR0/
* GICD_ISACTIVER0 registers are always RAZ/WI. The corresponding
* functionality is replaced by the GICR registers. It doesn't need to sync
* them. So it should increase the offset and clroffset to skip GIC_INTERNAL
* irqs. This matches the for_each_dist_irq_reg() macro which also skips the
* first GIC_INTERNAL irqs.
*/
offset += (GIC_INTERNAL * 1) / 8;
if (clroffset != 0) {
clroffset += (GIC_INTERNAL * 1) / 8;
}
for_each_dist_irq_reg(irq, s->num_irq, 1) {
/* If this bitmap is a set/clear register pair, first write to the
* clear-reg to clear all bits before using the set-reg to write
* the 1 bits.
*/
if (clroffset != 0) {
reg = 0;
kvm_gicd_access(s, clroffset, &reg, true);
clroffset += 4;
}
reg = *gic_bmp_ptr32(bmp, irq);
kvm_gicd_access(s, offset, &reg, true);
offset += 4;
}
}
static void kvm_arm_gicv3_check(GICv3State *s)
{
uint32_t reg;
uint32_t num_irq;
/* Sanity checking s->num_irq */
kvm_gicd_access(s, GICD_TYPER, &reg, false);
num_irq = ((reg & 0x1f) + 1) * 32;
if (num_irq < s->num_irq) {
error_report("Model requests %u IRQs, but kernel supports max %u",
s->num_irq, num_irq);
abort();
}
}
static void kvm_arm_gicv3_put(GICv3State *s)
{
uint32_t regl, regh, reg;
uint64_t reg64, redist_typer;
int ncpu, i;
kvm_arm_gicv3_check(s);
kvm_gicr_access(s, GICR_TYPER, 0, &regl, false);
kvm_gicr_access(s, GICR_TYPER + 4, 0, &regh, false);
redist_typer = ((uint64_t)regh << 32) | regl;
reg = s->gicd_ctlr;
kvm_gicd_access(s, GICD_CTLR, &reg, true);
if (redist_typer & GICR_TYPER_PLPIS) {
/*
* Restore base addresses before LPIs are potentially enabled by
* GICR_CTLR write
*/
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
reg64 = c->gicr_propbaser;
regl = (uint32_t)reg64;
kvm_gicr_access(s, GICR_PROPBASER, ncpu, &regl, true);
regh = (uint32_t)(reg64 >> 32);
kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, &regh, true);
reg64 = c->gicr_pendbaser;
regl = (uint32_t)reg64;
kvm_gicr_access(s, GICR_PENDBASER, ncpu, &regl, true);
regh = (uint32_t)(reg64 >> 32);
kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, &regh, true);
}
}
/* Redistributor state (one per CPU) */
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
reg = c->gicr_ctlr;
kvm_gicr_access(s, GICR_CTLR, ncpu, &reg, true);
reg = c->gicr_statusr[GICV3_NS];
kvm_gicr_access(s, GICR_STATUSR, ncpu, &reg, true);
reg = c->gicr_waker;
kvm_gicr_access(s, GICR_WAKER, ncpu, &reg, true);
reg = c->gicr_igroupr0;
kvm_gicr_access(s, GICR_IGROUPR0, ncpu, &reg, true);
reg = ~0;
kvm_gicr_access(s, GICR_ICENABLER0, ncpu, &reg, true);
reg = c->gicr_ienabler0;
kvm_gicr_access(s, GICR_ISENABLER0, ncpu, &reg, true);
/* Restore config before pending so we treat level/edge correctly */
reg = half_shuffle32(c->edge_trigger >> 16) << 1;
kvm_gicr_access(s, GICR_ICFGR1, ncpu, &reg, true);
reg = c->level;
kvm_gic_line_level_access(s, 0, ncpu, &reg, true);
reg = ~0;
kvm_gicr_access(s, GICR_ICPENDR0, ncpu, &reg, true);
reg = c->gicr_ipendr0;
kvm_gicr_access(s, GICR_ISPENDR0, ncpu, &reg, true);
reg = ~0;
kvm_gicr_access(s, GICR_ICACTIVER0, ncpu, &reg, true);
reg = c->gicr_iactiver0;
kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, &reg, true);
for (i = 0; i < GIC_INTERNAL; i += 4) {
reg = c->gicr_ipriorityr[i] |
(c->gicr_ipriorityr[i + 1] << 8) |
(c->gicr_ipriorityr[i + 2] << 16) |
(c->gicr_ipriorityr[i + 3] << 24);
kvm_gicr_access(s, GICR_IPRIORITYR + i, ncpu, &reg, true);
}
}
/* Distributor state (shared between all CPUs */
reg = s->gicd_statusr[GICV3_NS];
kvm_gicd_access(s, GICD_STATUSR, &reg, true);
/* s->enable bitmap -> GICD_ISENABLERn */
kvm_dist_putbmp(s, GICD_ISENABLER, GICD_ICENABLER, s->enabled);
/* s->group bitmap -> GICD_IGROUPRn */
kvm_dist_putbmp(s, GICD_IGROUPR, 0, s->group);
/* Restore targets before pending to ensure the pending state is set on
* the appropriate CPU interfaces in the kernel
*/
/* s->gicd_irouter[irq] -> GICD_IROUTERn
* We can't use kvm_dist_put() here because the registers are 64-bit
*/
for (i = GIC_INTERNAL; i < s->num_irq; i++) {
uint32_t offset;
offset = GICD_IROUTER + (sizeof(uint32_t) * i);
reg = (uint32_t)s->gicd_irouter[i];
kvm_gicd_access(s, offset, &reg, true);
offset = GICD_IROUTER + (sizeof(uint32_t) * i) + 4;
reg = (uint32_t)(s->gicd_irouter[i] >> 32);
kvm_gicd_access(s, offset, &reg, true);
}
/* s->trigger bitmap -> GICD_ICFGRn
* (restore configuration registers before pending IRQs so we treat
* level/edge correctly)
*/
kvm_dist_put_edge_trigger(s, GICD_ICFGR, s->edge_trigger);
/* s->level bitmap -> line_level */
kvm_gic_put_line_level_bmp(s, s->level);
/* s->pending bitmap -> GICD_ISPENDRn */
kvm_dist_putbmp(s, GICD_ISPENDR, GICD_ICPENDR, s->pending);
/* s->active bitmap -> GICD_ISACTIVERn */
kvm_dist_putbmp(s, GICD_ISACTIVER, GICD_ICACTIVER, s->active);
/* s->gicd_ipriority[] -> GICD_IPRIORITYRn */
kvm_dist_put_priority(s, GICD_IPRIORITYR, s->gicd_ipriority);
/* CPU Interface state (one per CPU) */
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
int num_pri_bits;
kvm_gicc_access(s, ICC_SRE_EL1, ncpu, &c->icc_sre_el1, true);
kvm_gicc_access(s, ICC_CTLR_EL1, ncpu,
&c->icc_ctlr_el1[GICV3_NS], true);
kvm_gicc_access(s, ICC_IGRPEN0_EL1, ncpu,
&c->icc_igrpen[GICV3_G0], true);
kvm_gicc_access(s, ICC_IGRPEN1_EL1, ncpu,
&c->icc_igrpen[GICV3_G1NS], true);
kvm_gicc_access(s, ICC_PMR_EL1, ncpu, &c->icc_pmr_el1, true);
kvm_gicc_access(s, ICC_BPR0_EL1, ncpu, &c->icc_bpr[GICV3_G0], true);
kvm_gicc_access(s, ICC_BPR1_EL1, ncpu, &c->icc_bpr[GICV3_G1NS], true);
num_pri_bits = ((c->icc_ctlr_el1[GICV3_NS] &
ICC_CTLR_EL1_PRIBITS_MASK) >>
ICC_CTLR_EL1_PRIBITS_SHIFT) + 1;
switch (num_pri_bits) {
case 7:
reg64 = c->icc_apr[GICV3_G0][3];
kvm_gicc_access(s, ICC_AP0R_EL1(3), ncpu, &reg64, true);
reg64 = c->icc_apr[GICV3_G0][2];
kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, true);
/* fall through */
case 6:
reg64 = c->icc_apr[GICV3_G0][1];
kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, true);
/* fall through */
default:
reg64 = c->icc_apr[GICV3_G0][0];
kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, true);
}
switch (num_pri_bits) {
case 7:
reg64 = c->icc_apr[GICV3_G1NS][3];
kvm_gicc_access(s, ICC_AP1R_EL1(3), ncpu, &reg64, true);
reg64 = c->icc_apr[GICV3_G1NS][2];
kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, true);
/* fall through */
case 6:
reg64 = c->icc_apr[GICV3_G1NS][1];
kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, true);
/* fall through */
default:
reg64 = c->icc_apr[GICV3_G1NS][0];
kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, true);
}
}
}
static void kvm_arm_gicv3_get(GICv3State *s)
{
uint32_t regl, regh, reg;
uint64_t reg64, redist_typer;
int ncpu, i;
kvm_arm_gicv3_check(s);
kvm_gicr_access(s, GICR_TYPER, 0, &regl, false);
kvm_gicr_access(s, GICR_TYPER + 4, 0, &regh, false);
redist_typer = ((uint64_t)regh << 32) | regl;
kvm_gicd_access(s, GICD_CTLR, &reg, false);
s->gicd_ctlr = reg;
/* Redistributor state (one per CPU) */
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
kvm_gicr_access(s, GICR_CTLR, ncpu, &reg, false);
c->gicr_ctlr = reg;
kvm_gicr_access(s, GICR_STATUSR, ncpu, &reg, false);
c->gicr_statusr[GICV3_NS] = reg;
kvm_gicr_access(s, GICR_WAKER, ncpu, &reg, false);
c->gicr_waker = reg;
kvm_gicr_access(s, GICR_IGROUPR0, ncpu, &reg, false);
c->gicr_igroupr0 = reg;
kvm_gicr_access(s, GICR_ISENABLER0, ncpu, &reg, false);
c->gicr_ienabler0 = reg;
kvm_gicr_access(s, GICR_ICFGR1, ncpu, &reg, false);
c->edge_trigger = half_unshuffle32(reg >> 1) << 16;
kvm_gic_line_level_access(s, 0, ncpu, &reg, false);
c->level = reg;
kvm_gicr_access(s, GICR_ISPENDR0, ncpu, &reg, false);
c->gicr_ipendr0 = reg;
kvm_gicr_access(s, GICR_ISACTIVER0, ncpu, &reg, false);
c->gicr_iactiver0 = reg;
for (i = 0; i < GIC_INTERNAL; i += 4) {
kvm_gicr_access(s, GICR_IPRIORITYR + i, ncpu, &reg, false);
c->gicr_ipriorityr[i] = extract32(reg, 0, 8);
c->gicr_ipriorityr[i + 1] = extract32(reg, 8, 8);
c->gicr_ipriorityr[i + 2] = extract32(reg, 16, 8);
c->gicr_ipriorityr[i + 3] = extract32(reg, 24, 8);
}
}
if (redist_typer & GICR_TYPER_PLPIS) {
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
kvm_gicr_access(s, GICR_PROPBASER, ncpu, &regl, false);
kvm_gicr_access(s, GICR_PROPBASER + 4, ncpu, &regh, false);
c->gicr_propbaser = ((uint64_t)regh << 32) | regl;
kvm_gicr_access(s, GICR_PENDBASER, ncpu, &regl, false);
kvm_gicr_access(s, GICR_PENDBASER + 4, ncpu, &regh, false);
c->gicr_pendbaser = ((uint64_t)regh << 32) | regl;
}
}
/* Distributor state (shared between all CPUs */
kvm_gicd_access(s, GICD_STATUSR, &reg, false);
s->gicd_statusr[GICV3_NS] = reg;
/* GICD_IGROUPRn -> s->group bitmap */
kvm_dist_getbmp(s, GICD_IGROUPR, s->group);
/* GICD_ISENABLERn -> s->enabled bitmap */
kvm_dist_getbmp(s, GICD_ISENABLER, s->enabled);
/* Line level of irq */
kvm_gic_get_line_level_bmp(s, s->level);
/* GICD_ISPENDRn -> s->pending bitmap */
kvm_dist_getbmp(s, GICD_ISPENDR, s->pending);
/* GICD_ISACTIVERn -> s->active bitmap */
kvm_dist_getbmp(s, GICD_ISACTIVER, s->active);
/* GICD_ICFGRn -> s->trigger bitmap */
kvm_dist_get_edge_trigger(s, GICD_ICFGR, s->edge_trigger);
/* GICD_IPRIORITYRn -> s->gicd_ipriority[] */
kvm_dist_get_priority(s, GICD_IPRIORITYR, s->gicd_ipriority);
/* GICD_IROUTERn -> s->gicd_irouter[irq] */
for (i = GIC_INTERNAL; i < s->num_irq; i++) {
uint32_t offset;
offset = GICD_IROUTER + (sizeof(uint32_t) * i);
kvm_gicd_access(s, offset, &regl, false);
offset = GICD_IROUTER + (sizeof(uint32_t) * i) + 4;
kvm_gicd_access(s, offset, &regh, false);
s->gicd_irouter[i] = ((uint64_t)regh << 32) | regl;
}
/*****************************************************************
* CPU Interface(s) State
*/
for (ncpu = 0; ncpu < s->num_cpu; ncpu++) {
GICv3CPUState *c = &s->cpu[ncpu];
int num_pri_bits;
kvm_gicc_access(s, ICC_SRE_EL1, ncpu, &c->icc_sre_el1, false);
kvm_gicc_access(s, ICC_CTLR_EL1, ncpu,
&c->icc_ctlr_el1[GICV3_NS], false);
kvm_gicc_access(s, ICC_IGRPEN0_EL1, ncpu,
&c->icc_igrpen[GICV3_G0], false);
kvm_gicc_access(s, ICC_IGRPEN1_EL1, ncpu,
&c->icc_igrpen[GICV3_G1NS], false);
kvm_gicc_access(s, ICC_PMR_EL1, ncpu, &c->icc_pmr_el1, false);
kvm_gicc_access(s, ICC_BPR0_EL1, ncpu, &c->icc_bpr[GICV3_G0], false);
kvm_gicc_access(s, ICC_BPR1_EL1, ncpu, &c->icc_bpr[GICV3_G1NS], false);
num_pri_bits = ((c->icc_ctlr_el1[GICV3_NS] &
ICC_CTLR_EL1_PRIBITS_MASK) >>
ICC_CTLR_EL1_PRIBITS_SHIFT) + 1;
switch (num_pri_bits) {
case 7:
kvm_gicc_access(s, ICC_AP0R_EL1(3), ncpu, &reg64, false);
c->icc_apr[GICV3_G0][3] = reg64;
kvm_gicc_access(s, ICC_AP0R_EL1(2), ncpu, &reg64, false);
c->icc_apr[GICV3_G0][2] = reg64;
/* fall through */
case 6:
kvm_gicc_access(s, ICC_AP0R_EL1(1), ncpu, &reg64, false);
c->icc_apr[GICV3_G0][1] = reg64;
/* fall through */
default:
kvm_gicc_access(s, ICC_AP0R_EL1(0), ncpu, &reg64, false);
c->icc_apr[GICV3_G0][0] = reg64;
}
switch (num_pri_bits) {
case 7:
kvm_gicc_access(s, ICC_AP1R_EL1(3), ncpu, &reg64, false);
c->icc_apr[GICV3_G1NS][3] = reg64;
kvm_gicc_access(s, ICC_AP1R_EL1(2), ncpu, &reg64, false);
c->icc_apr[GICV3_G1NS][2] = reg64;
/* fall through */
case 6:
kvm_gicc_access(s, ICC_AP1R_EL1(1), ncpu, &reg64, false);
c->icc_apr[GICV3_G1NS][1] = reg64;
/* fall through */
default:
kvm_gicc_access(s, ICC_AP1R_EL1(0), ncpu, &reg64, false);
c->icc_apr[GICV3_G1NS][0] = reg64;
}
}
}
static void arm_gicv3_icc_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
GICv3State *s;
GICv3CPUState *c;
c = (GICv3CPUState *)env->gicv3state;
s = c->gic;
c->icc_pmr_el1 = 0;
c->icc_bpr[GICV3_G0] = GIC_MIN_BPR;
c->icc_bpr[GICV3_G1] = GIC_MIN_BPR;
c->icc_bpr[GICV3_G1NS] = GIC_MIN_BPR;
c->icc_sre_el1 = 0x7;
memset(c->icc_apr, 0, sizeof(c->icc_apr));
memset(c->icc_igrpen, 0, sizeof(c->icc_igrpen));
if (s->migration_blocker) {
return;
}
/* Initialize to actual HW supported configuration */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CPU_SYSREGS,
KVM_VGIC_ATTR(ICC_CTLR_EL1, c->gicr_typer),
&c->icc_ctlr_el1[GICV3_NS], false, &error_abort);
c->icc_ctlr_el1[GICV3_S] = c->icc_ctlr_el1[GICV3_NS];
}
static void kvm_arm_gicv3_reset(DeviceState *dev)
{
GICv3State *s = ARM_GICV3_COMMON(dev);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s);
DPRINTF("Reset\n");
kgc->parent_reset(dev);
if (s->migration_blocker) {
DPRINTF("Cannot put kernel gic state, no kernel interface\n");
return;
}
kvm_arm_gicv3_put(s);
}
/*
* CPU interface registers of GIC needs to be reset on CPU reset.
* For the calling arm_gicv3_icc_reset() on CPU reset, we register
* below ARMCPRegInfo. As we reset the whole cpu interface under single
* register reset, we define only one register of CPU interface instead
* of defining all the registers.
*/
static const ARMCPRegInfo gicv3_cpuif_reginfo[] = {
{ .name = "ICC_CTLR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 12, .crm = 12, .opc2 = 4,
/*
* If ARM_CP_NOP is used, resetfn is not called,
* So ARM_CP_NO_RAW is appropriate type.
*/
.type = ARM_CP_NO_RAW,
.access = PL1_RW,
.readfn = arm_cp_read_zero,
.writefn = arm_cp_write_ignore,
/*
* We hang the whole cpu interface reset routine off here
* rather than parcelling it out into one little function
* per register
*/
.resetfn = arm_gicv3_icc_reset,
},
REGINFO_SENTINEL
};
/**
* vm_change_state_handler - VM change state callback aiming at flushing
* RDIST pending tables into guest RAM
*
* The tables get flushed to guest RAM whenever the VM gets stopped.
*/
static void vm_change_state_handler(void *opaque, bool running,
RunState state)
{
GICv3State *s = (GICv3State *)opaque;
Error *err = NULL;
int ret;
if (running) {
return;
}
ret = kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES,
NULL, true, &err);
if (err) {
error_report_err(err);
}
if (ret < 0 && ret != -EFAULT) {
abort();
}
}
static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
{
GICv3State *s = KVM_ARM_GICV3(dev);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s);
bool multiple_redist_region_allowed;
Error *local_err = NULL;
int i;
DPRINTF("kvm_arm_gicv3_realize\n");
kgc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (s->security_extn) {
error_setg(errp, "the in-kernel VGICv3 does not implement the "
"security extensions");
return;
}
gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL);
for (i = 0; i < s->num_cpu; i++) {
ARMCPU *cpu = ARM_CPU(qemu_get_cpu(i));
define_arm_cp_regs(cpu, gicv3_cpuif_reginfo);
}
/* Try to create the device via the device control API */
s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false);
if (s->dev_fd < 0) {
error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC");
return;
}
multiple_redist_region_allowed =
kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION);
if (!multiple_redist_region_allowed && s->nb_redist_regions > 1) {
error_setg(errp, "Multiple VGICv3 redistributor regions are not "
"supported by this host kernel");
error_append_hint(errp, "A maximum of %d VCPUs can be used",
s->redist_region_count[0]);
return;
}
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS,
0, &s->num_irq, true, &error_abort);
/* Tell the kernel to complete VGIC initialization now */
kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort);
kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd, 0);
if (!multiple_redist_region_allowed) {
kvm_arm_register_device(&s->redist_regions[0].iomem, -1,
KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd, 0);
} else {
/* we register regions in reverse order as "devices" are inserted at
* the head of a QSLIST and the list is then popped from the head
* onwards by kvm_arm_machine_init_done()
*/
for (i = s->nb_redist_regions - 1; i >= 0; i--) {
/* Address mask made of the rdist region index and count */
uint64_t addr_ormask =
i | ((uint64_t)s->redist_region_count[i] << 52);
kvm_arm_register_device(&s->redist_regions[i].iomem, -1,
KVM_DEV_ARM_VGIC_GRP_ADDR,
KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION,
s->dev_fd, addr_ormask);
}
}
if (kvm_has_gsi_routing()) {
/* set up irq routing */
for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) {
kvm_irqchip_add_irq_route(kvm_state, i, 0, i);
}
kvm_gsi_routing_allowed = true;
kvm_irqchip_commit_routes(kvm_state);
}
if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_DIST_REGS,
GICD_CTLR)) {
error_setg(&s->migration_blocker, "This operating system kernel does "
"not support vGICv3 migration");
if (migrate_add_blocker(s->migration_blocker, errp) < 0) {
error_free(s->migration_blocker);
return;
}
}
if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES)) {
qemu_add_vm_change_state_handler(vm_change_state_handler, s);
}
}
static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ARMGICv3CommonClass *agcc = ARM_GICV3_COMMON_CLASS(klass);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_CLASS(klass);
agcc->pre_save = kvm_arm_gicv3_get;
agcc->post_load = kvm_arm_gicv3_put;
device_class_set_parent_realize(dc, kvm_arm_gicv3_realize,
&kgc->parent_realize);
device_class_set_parent_reset(dc, kvm_arm_gicv3_reset, &kgc->parent_reset);
}
static const TypeInfo kvm_arm_gicv3_info = {
.name = TYPE_KVM_ARM_GICV3,
.parent = TYPE_ARM_GICV3_COMMON,
.instance_size = sizeof(GICv3State),
.class_init = kvm_arm_gicv3_class_init,
.class_size = sizeof(KVMARMGICv3Class),
};
static void kvm_arm_gicv3_register_types(void)
{
type_register_static(&kvm_arm_gicv3_info);
}
type_init(kvm_arm_gicv3_register_types)
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