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Subject[PATCH v6 18/18] sample/acrn: Introduce a sample of HSM ioctl interface usage
Date
From: Shuo Liu <shuo.a.liu@intel.com>

Launch a simple guest (with several instructions as payload) on ACRN
with demonstration ioctl usage.

Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
---
samples/acrn/Makefile | 12 ++++
samples/acrn/guest.ld | 9 +++
samples/acrn/payload.ld | 9 +++
samples/acrn/vm-sample.c | 136 +++++++++++++++++++++++++++++++++++++++
4 files changed, 166 insertions(+)
create mode 100644 samples/acrn/Makefile
create mode 100644 samples/acrn/guest.ld
create mode 100644 samples/acrn/payload.ld
create mode 100644 samples/acrn/vm-sample.c

diff --git a/samples/acrn/Makefile b/samples/acrn/Makefile
new file mode 100644
index 000000000000..c8e3ed9785e9
--- /dev/null
+++ b/samples/acrn/Makefile
@@ -0,0 +1,12 @@
+# SPDX-License-Identifier: GPL-2.0
+
+.PHONY: vm-sample
+
+vm-sample: vm-sample.o payload.o
+ $(CC) $^ -o $@
+
+payload.o: payload.ld guest16.o
+ $(LD) -T $< -o $@
+
+clean:
+ rm *.o vm-sample
diff --git a/samples/acrn/guest.ld b/samples/acrn/guest.ld
new file mode 100644
index 000000000000..5127c682bd22
--- /dev/null
+++ b/samples/acrn/guest.ld
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+OUTPUT_FORMAT(binary)
+SECTIONS
+{
+ .start : { *(.start) }
+ .text : { *(.text*) }
+ .rodata : { *(.rodata) }
+ .data : { *(.data) }
+}
diff --git a/samples/acrn/payload.ld b/samples/acrn/payload.ld
new file mode 100644
index 000000000000..e8d9a498ad62
--- /dev/null
+++ b/samples/acrn/payload.ld
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+SECTIONS
+{
+ .payload16 0 : {
+ guest16 = .;
+ guest16.o(.text)
+ guest16_end = .;
+ }
+}
diff --git a/samples/acrn/vm-sample.c b/samples/acrn/vm-sample.c
new file mode 100644
index 000000000000..b2dad47a77a0
--- /dev/null
+++ b/samples/acrn/vm-sample.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * A sample program to run a User VM on the ACRN hypervisor
+ *
+ * This sample runs in a Service VM, which is a privileged VM of ACRN.
+ * CONFIG_ACRN_HSM need to be enabled in the Service VM.
+ *
+ * Guest VM code in guest16.s will be executed after the VM launched.
+ *
+ * Copyright (C) 2020 Intel Corporation. All rights reserved.
+ */
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <malloc.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <linux/acrn.h>
+
+#define GUEST_MEMORY_SIZE (1024*1024)
+void *guest_memory;
+
+extern const unsigned char guest16[], guest16_end[];
+static char io_request_page[4096] __attribute__((aligned(4096)));
+static struct acrn_io_request *io_req_buf = (struct acrn_io_request *)io_request_page;
+
+__u16 vcpu_num;
+__u16 vmid;
+/* POST_STANDARD_VM_UUID1, refer to https://github.com/projectacrn/acrn-hypervisor/blob/master/hypervisor/include/common/vm_uuids.h */
+guid_t vm_uuid = GUID_INIT(0x385479d2, 0xd625, 0xe811, 0x86, 0x4e, 0xcb, 0x7a, 0x18, 0xb3, 0x46, 0x43);
+
+int hsm_fd;
+int is_running = 1;
+
+void vm_exit(int sig)
+{
+ sig = sig;
+
+ is_running = 0;
+ ioctl(hsm_fd, ACRN_IOCTL_PAUSE_VM, vmid);
+ ioctl(hsm_fd, ACRN_IOCTL_DESTROY_IOREQ_CLIENT, 0);
+}
+
+int main(int argc, char **argv)
+{
+ int vcpu_id, ret;
+ struct acrn_vm_creation create_vm = {0};
+ struct acrn_vm_memmap ram_map = {0};
+ struct acrn_vcpu_regs regs;
+ struct acrn_io_request *io_req;
+ struct acrn_ioreq_notify __attribute__((aligned(8))) notify;
+
+ argc = argc;
+ argv = argv;
+
+ guest_memory = memalign(4096, GUEST_MEMORY_SIZE);
+ if (!guest_memory) {
+ printf("No enough memory!\n");
+ return -1;
+ }
+ hsm_fd = open("/dev/acrn_hsm", O_RDWR|O_CLOEXEC);
+
+ memcpy(&create_vm.uuid, &vm_uuid, 16);
+ create_vm.ioreq_buf = (__u64)io_req_buf;
+ ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_VM, &create_vm);
+ printf("Created VM! [%d]\n", ret);
+ vcpu_num = create_vm.vcpu_num;
+ vmid = create_vm.vmid;
+
+ /* setup guest memory */
+ ram_map.type = ACRN_MEMMAP_RAM;
+ ram_map.vma_base = (__u64)guest_memory;
+ ram_map.len = GUEST_MEMORY_SIZE;
+ ram_map.user_vm_pa = 0;
+ ram_map.attr = ACRN_MEM_ACCESS_RWX;
+ ret = ioctl(hsm_fd, ACRN_IOCTL_SET_MEMSEG, &ram_map);
+ printf("Set up VM memory! [%d]\n", ret);
+
+ memcpy(guest_memory, guest16, guest16_end-guest16);
+
+ /* setup vcpu registers */
+ memset(&regs, 0, sizeof(regs));
+ regs.vcpu_id = 0;
+ regs.vcpu_regs.rip = 0;
+
+ /* CR0_ET | CR0_NE */
+ regs.vcpu_regs.cr0 = 0x30U;
+ regs.vcpu_regs.cs_ar = 0x009FU;
+ regs.vcpu_regs.cs_sel = 0xF000U;
+ regs.vcpu_regs.cs_limit = 0xFFFFU;
+ regs.vcpu_regs.cs_base = 0 & 0xFFFF0000UL;
+ regs.vcpu_regs.rip = 0 & 0xFFFFUL;
+
+ ret = ioctl(hsm_fd, ACRN_IOCTL_SET_VCPU_REGS, &regs);
+ printf("Set up VM BSP registers! [%d]\n", ret);
+
+ /* create an ioreq client for this VM */
+ ret = ioctl(hsm_fd, ACRN_IOCTL_CREATE_IOREQ_CLIENT, 0);
+ printf("Created IO request client! [%d]\n", ret);
+
+ /* run vm */
+ ret = ioctl(hsm_fd, ACRN_IOCTL_START_VM, vmid);
+ printf("Start VM! [%d]\n", ret);
+
+ signal(SIGINT, vm_exit);
+ while (is_running) {
+ ret = ioctl(hsm_fd, ACRN_IOCTL_ATTACH_IOREQ_CLIENT, 0);
+
+ for (vcpu_id = 0; vcpu_id < vcpu_num; vcpu_id++) {
+ io_req = &io_req_buf[vcpu_id];
+ if ((__sync_add_and_fetch(&io_req->processed, 0) == ACRN_IOREQ_STATE_PROCESSING)
+ && (!io_req->kernel_handled))
+ if (io_req->type == ACRN_IOREQ_TYPE_PORTIO) {
+ int bytes, port, in;
+
+ port = io_req->reqs.pio_request.address;
+ bytes = io_req->reqs.pio_request.size;
+ in = (io_req->reqs.pio_request.direction == ACRN_IOREQ_DIR_READ);
+ printf("Guest VM %s PIO[%x] with size[%x]\n", in ? "read" : "write", port, bytes);
+
+ notify.vmid = vmid;
+ notify.vcpu = vcpu_id;
+ ioctl(hsm_fd, ACRN_IOCTL_NOTIFY_REQUEST_FINISH, &notify);
+ }
+ }
+ }
+
+ ret = ioctl(hsm_fd, ACRN_IOCTL_DESTROY_VM, NULL);
+ printf("Destroy VM! [%d]\n", ret);
+ close(hsm_fd);
+ free(guest_memory);
+ return 0;
+}
--
2.28.0
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