From: Yong-Xuan Wang <yongxuan.w...@sifive.com>
Select KVM AIA when the host kernel has in-kernel AIA chip support.
Since KVM AIA only has one APLIC instance, we map the QEMU APLIC
devices to KVM APLIC.
Signed-off-by: Yong-Xuan Wang <yongxuan.w...@sifive.com>
Reviewed-by: Jim Shu <jim....@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarb...@ventanamicro.com>
Reviewed-by: Andrew Jones <ajo...@ventanamicro.com>
Message-ID: <20230727102439.22554-6-yongxuan.w...@sifive.com>
Signed-off-by: Alistair Francis <alistair.fran...@wdc.com>
---
hw/riscv/virt.c | 94 +++++++++++++++++++++++++++++++++----------------
1 file changed, 63 insertions(+), 31 deletions(-)
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 09a4030d4a..0353a6de56 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -35,6 +35,7 @@
#include "hw/riscv/virt.h"
#include "hw/riscv/boot.h"
#include "hw/riscv/numa.h"
+#include "kvm_riscv.h"
#include "hw/intc/riscv_aclint.h"
#include "hw/intc/riscv_aplic.h"
#include "hw/intc/riscv_imsic.h"
@@ -75,6 +76,12 @@
#error "Can't accommodate all IMSIC groups in address space"
#endif
+/* KVM AIA only supports APLIC MSI. APLIC Wired is always emulated by QEMU. */
+static bool virt_use_kvm_aia(RISCVVirtState *s)
+{
+ return kvm_irqchip_in_kernel() && s->aia_type == VIRT_AIA_TYPE_APLIC_IMSIC;
+}
+
static const MemMapEntry virt_memmap[] = {
[VIRT_DEBUG] = { 0x0, 0x100 },
[VIRT_MROM] = { 0x1000, 0xf000 },
@@ -609,16 +616,16 @@ static void create_fdt_one_aplic(RISCVVirtState *s, int
socket,
uint32_t *intc_phandles,
uint32_t aplic_phandle,
uint32_t aplic_child_phandle,
- bool m_mode)
+ bool m_mode, int num_harts)
{
int cpu;
char *aplic_name;
uint32_t *aplic_cells;
MachineState *ms = MACHINE(s);
- aplic_cells = g_new0(uint32_t, s->soc[socket].num_harts * 2);
+ aplic_cells = g_new0(uint32_t, num_harts * 2);
- for (cpu = 0; cpu < s->soc[socket].num_harts; cpu++) {
+ for (cpu = 0; cpu < num_harts; cpu++) {
aplic_cells[cpu * 2 + 0] = cpu_to_be32(intc_phandles[cpu]);
aplic_cells[cpu * 2 + 1] = cpu_to_be32(m_mode ? IRQ_M_EXT : IRQ_S_EXT);
}
@@ -632,8 +639,7 @@ static void create_fdt_one_aplic(RISCVVirtState *s, int
socket,
if (s->aia_type == VIRT_AIA_TYPE_APLIC) {
qemu_fdt_setprop(ms->fdt, aplic_name, "interrupts-extended",
- aplic_cells,
- s->soc[socket].num_harts * sizeof(uint32_t) * 2);
+ aplic_cells, num_harts * sizeof(uint32_t) * 2);
} else {
qemu_fdt_setprop_cell(ms->fdt, aplic_name, "msi-parent", msi_phandle);
}
@@ -664,7 +670,8 @@ static void create_fdt_socket_aplic(RISCVVirtState *s,
uint32_t msi_s_phandle,
uint32_t *phandle,
uint32_t *intc_phandles,
- uint32_t *aplic_phandles)
+ uint32_t *aplic_phandles,
+ int num_harts)
{
char *aplic_name;
unsigned long aplic_addr;
@@ -681,7 +688,7 @@ static void create_fdt_socket_aplic(RISCVVirtState *s,
create_fdt_one_aplic(s, socket, aplic_addr, memmap[VIRT_APLIC_M].size,
msi_m_phandle, intc_phandles,
aplic_m_phandle, aplic_s_phandle,
- true);
+ true, num_harts);
}
/* S-level APLIC node */
@@ -690,7 +697,7 @@ static void create_fdt_socket_aplic(RISCVVirtState *s,
create_fdt_one_aplic(s, socket, aplic_addr, memmap[VIRT_APLIC_S].size,
msi_s_phandle, intc_phandles,
aplic_s_phandle, 0,
- false);
+ false, num_harts);
aplic_name = g_strdup_printf("/soc/aplic@%lx", aplic_addr);
@@ -774,34 +781,51 @@ static void create_fdt_sockets(RISCVVirtState *s, const
MemMapEntry *memmap,
*msi_pcie_phandle = msi_s_phandle;
}
- phandle_pos = ms->smp.cpus;
- for (socket = (socket_count - 1); socket >= 0; socket--) {
- phandle_pos -= s->soc[socket].num_harts;
-
- if (s->aia_type == VIRT_AIA_TYPE_NONE) {
- create_fdt_socket_plic(s, memmap, socket, phandle,
- &intc_phandles[phandle_pos], xplic_phandles);
- } else {
- create_fdt_socket_aplic(s, memmap, socket,
- msi_m_phandle, msi_s_phandle, phandle,
- &intc_phandles[phandle_pos], xplic_phandles);
+ /* KVM AIA only has one APLIC instance */
+ if (virt_use_kvm_aia(s)) {
+ create_fdt_socket_aplic(s, memmap, 0,
+ msi_m_phandle, msi_s_phandle, phandle,
+ &intc_phandles[0], xplic_phandles,
+ ms->smp.cpus);
+ } else {
+ phandle_pos = ms->smp.cpus;
+ for (socket = (socket_count - 1); socket >= 0; socket--) {
+ phandle_pos -= s->soc[socket].num_harts;
+
+ if (s->aia_type == VIRT_AIA_TYPE_NONE) {
+ create_fdt_socket_plic(s, memmap, socket, phandle,
+ &intc_phandles[phandle_pos],
+ xplic_phandles);
+ } else {
+ create_fdt_socket_aplic(s, memmap, socket,
+ msi_m_phandle, msi_s_phandle, phandle,
+ &intc_phandles[phandle_pos],
+ xplic_phandles,
+ s->soc[socket].num_harts);
+ }
}
}
g_free(intc_phandles);
- for (socket = 0; socket < socket_count; socket++) {
- if (socket == 0) {
- *irq_mmio_phandle = xplic_phandles[socket];
- *irq_virtio_phandle = xplic_phandles[socket];
- *irq_pcie_phandle = xplic_phandles[socket];
- }
- if (socket == 1) {
- *irq_virtio_phandle = xplic_phandles[socket];
- *irq_pcie_phandle = xplic_phandles[socket];
- }
- if (socket == 2) {
- *irq_pcie_phandle = xplic_phandles[socket];
+ if (virt_use_kvm_aia(s)) {
+ *irq_mmio_phandle = xplic_phandles[0];
+ *irq_virtio_phandle = xplic_phandles[0];
+ *irq_pcie_phandle = xplic_phandles[0];
+ } else {
+ for (socket = 0; socket < socket_count; socket++) {
+ if (socket == 0) {
+ *irq_mmio_phandle = xplic_phandles[socket];
+ *irq_virtio_phandle = xplic_phandles[socket];
+ *irq_pcie_phandle = xplic_phandles[socket];
+ }
+ if (socket == 1) {
+ *irq_virtio_phandle = xplic_phandles[socket];
+ *irq_pcie_phandle = xplic_phandles[socket];
+ }
+ if (socket == 2) {
+ *irq_pcie_phandle = xplic_phandles[socket];
+ }
}
}
@@ -1437,6 +1461,14 @@ static void virt_machine_init(MachineState *machine)
}
}
+ if (virt_use_kvm_aia(s)) {
+ kvm_riscv_aia_create(machine, IMSIC_MMIO_GROUP_MIN_SHIFT,
+ VIRT_IRQCHIP_NUM_SOURCES, VIRT_IRQCHIP_NUM_MSIS,
+ memmap[VIRT_APLIC_S].base,
+ memmap[VIRT_IMSIC_S].base,
+ s->aia_guests);
+ }
+
if (riscv_is_32bit(&s->soc[0])) {
#if HOST_LONG_BITS == 64
/* limit RAM size in a 32-bit system */
--
2.41.0
