#include "kvm/irq.h"
#include "kvm/kvm.h"
#include "kvm/pci.h"
+#include <sys/mman.h>
#include <sys/types.h>
#include <sys/ioctl.h>
.bar[1] = VESA_MEM_ADDR | PCI_BASE_ADDRESS_SPACE_MEMORY,
};
-static void vesa_mmio_callback(u64 addr, u8 *data, u32 len, u8 is_write)
-{
- if (!is_write)
- return;
-
- fb__write(addr, data, len);
-}
-
static struct framebuffer vesafb;
struct framebuffer *vesa__init(struct kvm *kvm)
vesa_pci_device.bar[0] = vesa_base_addr | PCI_BASE_ADDRESS_SPACE_IO;
pci__register(&vesa_pci_device, dev);
- kvm__register_mmio(kvm, VESA_MEM_ADDR, VESA_MEM_SIZE, &vesa_mmio_callback);
-
- mem = calloc(1, VESA_MEM_SIZE);
- if (!mem)
+ mem = mmap(NULL, VESA_MEM_SIZE, PROT_RW, MAP_ANON_NORESERVE, -1, 0);
+ if (mem == MAP_FAILED)
return NULL;
+ kvm__register_mem(kvm, VESA_MEM_ADDR, VESA_MEM_SIZE, mem);
+
vesafb = (struct framebuffer) {
.width = VESA_WIDTH,
.height = VESA_HEIGHT,
#include <time.h>
#define KVM_NR_CPUS (255)
-#define KVM_32BIT_GAP_SIZE (512 << 20)
+
+/*
+ * The hole includes VESA framebuffer and PCI memory.
+ */
+#define KVM_32BIT_GAP_SIZE (768 << 20)
#define KVM_32BIT_GAP_START ((1ULL << 32) - KVM_32BIT_GAP_SIZE)
#define SIGKVMEXIT (SIGRTMIN + 0)
int nrcpus; /* Number of cpus to run */
+ u32 mem_slots; /* for KVM_SET_USER_MEMORY_REGION */
+
u64 ram_size;
void *ram_start;
void kvm__irq_line(struct kvm *kvm, int irq, int level);
bool kvm__emulate_io(struct kvm *kvm, u16 port, void *data, int direction, int size, u32 count);
bool kvm__emulate_mmio(struct kvm *kvm, u64 phys_addr, u8 *data, u32 len, u8 is_write);
+void kvm__register_mem(struct kvm *kvm, u64 guest_phys, u64 size, void *userspace_addr);
bool kvm__register_mmio(struct kvm *kvm, u64 phys_addr, u64 phys_addr_len, void (*kvm_mmio_callback_fn)(u64 addr, u8 *data, u32 len, u8 is_write));
bool kvm__deregister_mmio(struct kvm *kvm, u64 phys_addr);
void kvm__pause(void);
return regs.ecx & (1 << feature);
}
-static void kvm_register_mem_slot(struct kvm *kvm, u32 slot, u64 guest_phys, u64 size, void *userspace_addr)
+/*
+ * Note: KVM_SET_USER_MEMORY_REGION assumes that we don't pass overlapping
+ * memory regions to it. Therefore, be careful if you use this function for
+ * registering memory regions for emulating hardware.
+ */
+void kvm__register_mem(struct kvm *kvm, u64 guest_phys, u64 size, void *userspace_addr)
{
struct kvm_userspace_memory_region mem;
int ret;
mem = (struct kvm_userspace_memory_region) {
- .slot = slot,
+ .slot = kvm->mem_slots++,
.guest_phys_addr = guest_phys,
.memory_size = size,
.userspace_addr = (unsigned long)userspace_addr,
phys_size = kvm->ram_size;
host_mem = kvm->ram_start;
- kvm_register_mem_slot(kvm, 0, phys_start, phys_size, host_mem);
+ kvm__register_mem(kvm, phys_start, phys_size, host_mem);
} else {
/* First RAM range from zero to the PCI gap: */
phys_size = KVM_32BIT_GAP_START;
host_mem = kvm->ram_start;
- kvm_register_mem_slot(kvm, 0, phys_start, phys_size, host_mem);
+ kvm__register_mem(kvm, phys_start, phys_size, host_mem);
/* Second RAM range from 4GB to the end of RAM: */
phys_size = kvm->ram_size - phys_size;
host_mem = kvm->ram_start + phys_start;
- kvm_register_mem_slot(kvm, 1, phys_start, phys_size, host_mem);
+ kvm__register_mem(kvm, phys_start, phys_size, host_mem);
}
}