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-rw-r--r--target/i386/hax-all.c2
-rw-r--r--target/i386/hax-darwin.c27
-rw-r--r--target/i386/hax-darwin.h1
-rw-r--r--target/i386/hax-i386.h1
-rw-r--r--target/i386/hax-interface.h8
-rw-r--r--target/i386/hax-mem.c34
-rw-r--r--target/i386/hax-windows.c38
-rw-r--r--target/i386/hax-windows.h2
8 files changed, 88 insertions, 25 deletions
diff --git a/target/i386/hax-all.c b/target/i386/hax-all.c
index bc9a12c..cad7531 100644
--- a/target/i386/hax-all.c
+++ b/target/i386/hax-all.c
@@ -103,6 +103,8 @@ static int hax_get_capability(struct hax_state *hax)
return -ENOTSUP;
}
+ hax->supports_64bit_ramblock = !!(cap->winfo & HAX_CAP_64BIT_RAMBLOCK);
+
if (cap->wstatus & HAX_CAP_MEMQUOTA) {
if (cap->mem_quota < hax->mem_quota) {
fprintf(stderr, "The VM memory needed exceeds the driver limit.\n");
diff --git a/target/i386/hax-darwin.c b/target/i386/hax-darwin.c
index ee94174..acdde47 100644
--- a/target/i386/hax-darwin.c
+++ b/target/i386/hax-darwin.c
@@ -28,21 +28,36 @@ hax_fd hax_mod_open(void)
return fd;
}
-int hax_populate_ram(uint64_t va, uint32_t size)
+int hax_populate_ram(uint64_t va, uint64_t size)
{
int ret;
- struct hax_alloc_ram_info info;
if (!hax_global.vm || !hax_global.vm->fd) {
fprintf(stderr, "Allocate memory before vm create?\n");
return -EINVAL;
}
- info.size = size;
- info.va = va;
- ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_ALLOC_RAM, &info);
+ if (hax_global.supports_64bit_ramblock) {
+ struct hax_ramblock_info ramblock = {
+ .start_va = va,
+ .size = size,
+ .reserved = 0
+ };
+
+ ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_ADD_RAMBLOCK, &ramblock);
+ } else {
+ struct hax_alloc_ram_info info = {
+ .size = (uint32_t)size,
+ .pad = 0,
+ .va = va
+ };
+
+ ret = ioctl(hax_global.vm->fd, HAX_VM_IOCTL_ALLOC_RAM, &info);
+ }
if (ret < 0) {
- fprintf(stderr, "Failed to allocate %x memory\n", size);
+ fprintf(stderr, "Failed to register RAM block: ret=%d, va=0x%" PRIx64
+ ", size=0x%" PRIx64 ", method=%s\n", ret, va, size,
+ hax_global.supports_64bit_ramblock ? "new" : "legacy");
return ret;
}
return 0;
diff --git a/target/i386/hax-darwin.h b/target/i386/hax-darwin.h
index fb8e25a..51af0e8 100644
--- a/target/i386/hax-darwin.h
+++ b/target/i386/hax-darwin.h
@@ -44,6 +44,7 @@ static inline void hax_close_fd(hax_fd fd)
#define HAX_VM_IOCTL_SET_RAM _IOWR(0, 0x82, struct hax_set_ram_info)
#define HAX_VM_IOCTL_VCPU_DESTROY _IOW(0, 0x83, uint32_t)
#define HAX_VM_IOCTL_NOTIFY_QEMU_VERSION _IOW(0, 0x84, struct hax_qemu_version)
+#define HAX_VM_IOCTL_ADD_RAMBLOCK _IOW(0, 0x85, struct hax_ramblock_info)
#define HAX_VCPU_IOCTL_RUN _IO(0, 0xc0)
#define HAX_VCPU_IOCTL_SET_MSRS _IOWR(0, 0xc1, struct hax_msr_data)
diff --git a/target/i386/hax-i386.h b/target/i386/hax-i386.h
index 8ffe91f..6abc156 100644
--- a/target/i386/hax-i386.h
+++ b/target/i386/hax-i386.h
@@ -37,6 +37,7 @@ struct hax_state {
uint32_t version;
struct hax_vm *vm;
uint64_t mem_quota;
+ bool supports_64bit_ramblock;
};
#define HAX_MAX_VCPU 0x10
diff --git a/target/i386/hax-interface.h b/target/i386/hax-interface.h
index d141308..93d5fcb 100644
--- a/target/i386/hax-interface.h
+++ b/target/i386/hax-interface.h
@@ -308,6 +308,13 @@ struct hax_alloc_ram_info {
uint32_t pad;
uint64_t va;
} __attribute__ ((__packed__));
+
+struct hax_ramblock_info {
+ uint64_t start_va;
+ uint64_t size;
+ uint64_t reserved;
+} __attribute__ ((__packed__));
+
#define HAX_RAM_INFO_ROM 0x01 /* Read-Only */
#define HAX_RAM_INFO_INVALID 0x80 /* Unmapped, usually used for MMIO */
struct hax_set_ram_info {
@@ -327,6 +334,7 @@ struct hax_set_ram_info {
#define HAX_CAP_MEMQUOTA 0x2
#define HAX_CAP_UG 0x4
+#define HAX_CAP_64BIT_RAMBLOCK 0x8
struct hax_capabilityinfo {
/* bit 0: 1 - working
diff --git a/target/i386/hax-mem.c b/target/i386/hax-mem.c
index 27a0d21..f46e855 100644
--- a/target/i386/hax-mem.c
+++ b/target/i386/hax-mem.c
@@ -174,6 +174,7 @@ static void hax_process_section(MemoryRegionSection *section, uint8_t flags)
ram_addr_t size = int128_get64(section->size);
unsigned int delta;
uint64_t host_va;
+ uint32_t max_mapping_size;
/* We only care about RAM and ROM regions */
if (!memory_region_is_ram(mr)) {
@@ -206,10 +207,23 @@ static void hax_process_section(MemoryRegionSection *section, uint8_t flags)
flags |= HAX_RAM_INFO_ROM;
}
- /* the kernel module interface uses 32-bit sizes (but we could split...) */
- g_assert(size <= UINT32_MAX);
-
- hax_update_mapping(start_pa, size, host_va, flags);
+ /*
+ * The kernel module interface uses 32-bit sizes:
+ * https://github.com/intel/haxm/blob/master/API.md#hax_vm_ioctl_set_ram
+ *
+ * If the mapping size is longer than 32 bits, we can't process it in one
+ * call into the kernel. Instead, we split the mapping into smaller ones,
+ * and call hax_update_mapping() on each.
+ */
+ max_mapping_size = UINT32_MAX & qemu_real_host_page_mask;
+ while (size > max_mapping_size) {
+ hax_update_mapping(start_pa, max_mapping_size, host_va, flags);
+ start_pa += max_mapping_size;
+ size -= max_mapping_size;
+ host_va += max_mapping_size;
+ }
+ /* Now size <= max_mapping_size */
+ hax_update_mapping(start_pa, (uint32_t)size, host_va, flags);
}
static void hax_region_add(MemoryListener *listener,
@@ -283,12 +297,16 @@ static MemoryListener hax_memory_listener = {
static void hax_ram_block_added(RAMBlockNotifier *n, void *host, size_t size)
{
/*
- * In HAX, QEMU allocates the virtual address, and HAX kernel
- * populates the memory with physical memory. Currently we have no
- * paging, so user should make sure enough free memory in advance.
+ * We must register each RAM block with the HAXM kernel module, or
+ * hax_set_ram() will fail for any mapping into the RAM block:
+ * https://github.com/intel/haxm/blob/master/API.md#hax_vm_ioctl_alloc_ram
+ *
+ * Old versions of the HAXM kernel module (< 6.2.0) used to preallocate all
+ * host physical pages for the RAM block as part of this registration
+ * process, hence the name hax_populate_ram().
*/
if (hax_populate_ram((uint64_t)(uintptr_t)host, size) < 0) {
- fprintf(stderr, "HAX failed to populate RAM");
+ fprintf(stderr, "HAX failed to populate RAM\n");
abort();
}
}
diff --git a/target/i386/hax-windows.c b/target/i386/hax-windows.c
index 15a180b..b1ac737 100644
--- a/target/i386/hax-windows.c
+++ b/target/i386/hax-windows.c
@@ -58,10 +58,9 @@ static int hax_open_device(hax_fd *fd)
return fd;
}
-int hax_populate_ram(uint64_t va, uint32_t size)
+int hax_populate_ram(uint64_t va, uint64_t size)
{
int ret;
- struct hax_alloc_ram_info info;
HANDLE hDeviceVM;
DWORD dSize = 0;
@@ -70,18 +69,35 @@ int hax_populate_ram(uint64_t va, uint32_t size)
return -EINVAL;
}
- info.size = size;
- info.va = va;
-
hDeviceVM = hax_global.vm->fd;
-
- ret = DeviceIoControl(hDeviceVM,
- HAX_VM_IOCTL_ALLOC_RAM,
- &info, sizeof(info), NULL, 0, &dSize,
- (LPOVERLAPPED) NULL);
+ if (hax_global.supports_64bit_ramblock) {
+ struct hax_ramblock_info ramblock = {
+ .start_va = va,
+ .size = size,
+ .reserved = 0
+ };
+
+ ret = DeviceIoControl(hDeviceVM,
+ HAX_VM_IOCTL_ADD_RAMBLOCK,
+ &ramblock, sizeof(ramblock), NULL, 0, &dSize,
+ (LPOVERLAPPED) NULL);
+ } else {
+ struct hax_alloc_ram_info info = {
+ .size = (uint32_t) size,
+ .pad = 0,
+ .va = va
+ };
+
+ ret = DeviceIoControl(hDeviceVM,
+ HAX_VM_IOCTL_ALLOC_RAM,
+ &info, sizeof(info), NULL, 0, &dSize,
+ (LPOVERLAPPED) NULL);
+ }
if (!ret) {
- fprintf(stderr, "Failed to allocate %x memory\n", size);
+ fprintf(stderr, "Failed to register RAM block: va=0x%" PRIx64
+ ", size=0x%" PRIx64 ", method=%s\n", va, size,
+ hax_global.supports_64bit_ramblock ? "new" : "legacy");
return ret;
}
diff --git a/target/i386/hax-windows.h b/target/i386/hax-windows.h
index 20e2f85..12cbd81 100644
--- a/target/i386/hax-windows.h
+++ b/target/i386/hax-windows.h
@@ -57,6 +57,8 @@ static inline int hax_invalid_fd(hax_fd fd)
METHOD_BUFFERED, FILE_ANY_ACCESS)
#define HAX_VM_IOCTL_VCPU_DESTROY CTL_CODE(HAX_DEVICE_TYPE, 0x905, \
METHOD_BUFFERED, FILE_ANY_ACCESS)
+#define HAX_VM_IOCTL_ADD_RAMBLOCK CTL_CODE(HAX_DEVICE_TYPE, 0x913, \
+ METHOD_BUFFERED, FILE_ANY_ACCESS)
#define HAX_VCPU_IOCTL_RUN CTL_CODE(HAX_DEVICE_TYPE, 0x906, \
METHOD_BUFFERED, FILE_ANY_ACCESS)
generated by cgit v1.1 at 2024-12-25 04:45:17 +0000