From 2b284fa9ea17171b11e9112daf19801b90b690a6 Mon Sep 17 00:00:00 2001 From: Song Gao Date: Tue, 28 May 2024 16:38:55 +0800 Subject: hw/loongarch/virt: Enable extioi virt extension This patch adds a new board attribute 'v-eiointc'. A value of true enables the virt extended I/O interrupt controller. VMs working in kvm mode have 'v-eiointc' enabled by default. Signed-off-by: Song Gao Reviewed-by: Bibo Mao Message-Id: <20240528083855.1912757-4-gaosong@loongson.cn> --- hw/loongarch/virt.c | 88 +++++++++++++++++++++++++++++++++++++++++++-- include/hw/loongarch/virt.h | 1 + target/loongarch/cpu.h | 1 + 3 files changed, 87 insertions(+), 3 deletions(-) diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c index 0cef33a..66cef20 100644 --- a/hw/loongarch/virt.c +++ b/hw/loongarch/virt.c @@ -11,6 +11,7 @@ #include "hw/boards.h" #include "hw/char/serial.h" #include "sysemu/kvm.h" +#include "sysemu/tcg.h" #include "sysemu/sysemu.h" #include "sysemu/qtest.h" #include "sysemu/runstate.h" @@ -48,6 +49,31 @@ #include "hw/virtio/virtio-iommu.h" #include "qemu/error-report.h" +static bool virt_is_veiointc_enabled(LoongArchVirtMachineState *lvms) +{ + if (lvms->veiointc == ON_OFF_AUTO_OFF) { + return false; + } + return true; +} + +static void virt_get_veiointc(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(obj); + OnOffAuto veiointc = lvms->veiointc; + + visit_type_OnOffAuto(v, name, &veiointc, errp); +} + +static void virt_set_veiointc(Object *obj, Visitor *v, const char *name, + void *opaque, Error **errp) +{ + LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(obj); + + visit_type_OnOffAuto(v, name, &lvms->veiointc, errp); +} + static PFlashCFI01 *virt_flash_create1(LoongArchVirtMachineState *lvms, const char *name, const char *alias_prop_name) @@ -790,9 +816,16 @@ static void virt_irq_init(LoongArchVirtMachineState *lvms) /* Create EXTIOI device */ extioi = qdev_new(TYPE_LOONGARCH_EXTIOI); qdev_prop_set_uint32(extioi, "num-cpu", ms->smp.cpus); + if (virt_is_veiointc_enabled(lvms)) { + qdev_prop_set_bit(extioi, "has-virtualization-extension", true); + } sysbus_realize_and_unref(SYS_BUS_DEVICE(extioi), &error_fatal); memory_region_add_subregion(&lvms->system_iocsr, APIC_BASE, - sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi), 0)); + sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi), 0)); + if (virt_is_veiointc_enabled(lvms)) { + memory_region_add_subregion(&lvms->system_iocsr, EXTIOI_VIRT_BASE, + sysbus_mmio_get_region(SYS_BUS_DEVICE(extioi), 1)); + } /* * connect ext irq to the cpu irq @@ -899,11 +932,37 @@ static void virt_firmware_init(LoongArchVirtMachineState *lvms) } } - static MemTxResult virt_iocsr_misc_write(void *opaque, hwaddr addr, uint64_t val, unsigned size, MemTxAttrs attrs) { + LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(opaque); + uint64_t features; + + switch (addr) { + case MISC_FUNC_REG: + if (!virt_is_veiointc_enabled(lvms)) { + return MEMTX_OK; + } + + features = address_space_ldl(&lvms->as_iocsr, + EXTIOI_VIRT_BASE + EXTIOI_VIRT_CONFIG, + attrs, NULL); + if (val & BIT_ULL(IOCSRM_EXTIOI_EN)) { + features |= BIT(EXTIOI_ENABLE); + } + if (val & BIT_ULL(IOCSRM_EXTIOI_INT_ENCODE)) { + features |= BIT(EXTIOI_ENABLE_INT_ENCODE); + } + + address_space_stl(&lvms->as_iocsr, + EXTIOI_VIRT_BASE + EXTIOI_VIRT_CONFIG, + features, attrs, NULL); + break; + default: + g_assert_not_reached(); + } + return MEMTX_OK; } @@ -911,7 +970,9 @@ static MemTxResult virt_iocsr_misc_read(void *opaque, hwaddr addr, uint64_t *data, unsigned size, MemTxAttrs attrs) { + LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(opaque); uint64_t ret = 0; + int features; switch (addr) { case VERSION_REG: @@ -930,7 +991,20 @@ static MemTxResult virt_iocsr_misc_read(void *opaque, hwaddr addr, ret = 0x303030354133ULL; /* "3A5000" */ break; case MISC_FUNC_REG: - ret = BIT_ULL(IOCSRM_EXTIOI_EN); + if (!virt_is_veiointc_enabled(lvms)) { + ret |= BIT_ULL(IOCSRM_EXTIOI_EN); + break; + } + + features = address_space_ldl(&lvms->as_iocsr, + EXTIOI_VIRT_BASE + EXTIOI_VIRT_CONFIG, + attrs, NULL); + if (features & BIT(EXTIOI_ENABLE)) { + ret |= BIT_ULL(IOCSRM_EXTIOI_EN); + } + if (features & BIT(EXTIOI_ENABLE_INT_ENCODE)) { + ret |= BIT_ULL(IOCSRM_EXTIOI_INT_ENCODE); + } break; default: g_assert_not_reached(); @@ -1152,6 +1226,9 @@ static void virt_initfn(Object *obj) { LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(obj); + if (tcg_enabled()) { + lvms->veiointc = ON_OFF_AUTO_OFF; + } lvms->acpi = ON_OFF_AUTO_AUTO; lvms->oem_id = g_strndup(ACPI_BUILD_APPNAME6, 6); lvms->oem_table_id = g_strndup(ACPI_BUILD_APPNAME8, 8); @@ -1338,6 +1415,11 @@ static void virt_class_init(ObjectClass *oc, void *data) NULL, NULL); object_class_property_set_description(oc, "acpi", "Enable ACPI"); + object_class_property_add(oc, "v-eiointc", "OnOffAuto", + virt_get_veiointc, virt_set_veiointc, + NULL, NULL); + object_class_property_set_description(oc, "v-eiointc", + "Enable Virt Extend I/O Interrupt Controller."); machine_class_allow_dynamic_sysbus_dev(mc, TYPE_RAMFB_DEVICE); #ifdef CONFIG_TPM machine_class_allow_dynamic_sysbus_dev(mc, TYPE_TPM_TIS_SYSBUS); diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h index 2c4f5cf..8fdfacf 100644 --- a/include/hw/loongarch/virt.h +++ b/include/hw/loongarch/virt.h @@ -50,6 +50,7 @@ struct LoongArchVirtMachineState { Notifier machine_done; Notifier powerdown_notifier; OnOffAuto acpi; + OnOffAuto veiointc; char *oem_id; char *oem_table_id; DeviceState *acpi_ged; diff --git a/target/loongarch/cpu.h b/target/loongarch/cpu.h index 41b8e6d..6c41faf 100644 --- a/target/loongarch/cpu.h +++ b/target/loongarch/cpu.h @@ -36,6 +36,7 @@ #define CPUNAME_REG 0x20 #define MISC_FUNC_REG 0x420 #define IOCSRM_EXTIOI_EN 48 +#define IOCSRM_EXTIOI_INT_ENCODE 49 #define IOCSR_MEM_SIZE 0x428 -- cgit v1.1