git: ff50e9d53ff8 - main - bhyve: Add bhyverun and vmexit handlers for arm64
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Date: Wed, 10 Apr 2024 15:19:14 UTC
The branch main has been updated by markj:
URL: https://cgit.FreeBSD.org/src/commit/?id=ff50e9d53ff836bd6276c9f5a355e0ab03a99c61
commit ff50e9d53ff836bd6276c9f5a355e0ab03a99c61
Author: Andrew Turner <andrew@freebsd.org>
AuthorDate: 2024-04-03 17:10:41 +0000
Commit: Mark Johnston <markj@FreeBSD.org>
CommitDate: 2024-04-10 15:17:56 +0000
bhyve: Add bhyverun and vmexit handlers for arm64
Reviewed by: corvink, jhb
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D41006
---
usr.sbin/bhyve/aarch64/Makefile.inc | 8 +
usr.sbin/bhyve/aarch64/bhyverun_machdep.c | 245 ++++++++++++++++++++++++++++
usr.sbin/bhyve/aarch64/vmexit.c | 260 ++++++++++++++++++++++++++++++
usr.sbin/bhyve/bhyverun.c | 7 +-
4 files changed, 517 insertions(+), 3 deletions(-)
diff --git a/usr.sbin/bhyve/aarch64/Makefile.inc b/usr.sbin/bhyve/aarch64/Makefile.inc
new file mode 100644
index 000000000000..2c7a3cac105e
--- /dev/null
+++ b/usr.sbin/bhyve/aarch64/Makefile.inc
@@ -0,0 +1,8 @@
+SRCS+= \
+ fdt.c \
+ uart_pl011.c
+
+.PATH: ${BHYVE_SYSDIR}/sys/arm64/vmm
+SRCS+= vmm_instruction_emul.c
+
+BHYVE_FDT_SUPPORT=
diff --git a/usr.sbin/bhyve/aarch64/bhyverun_machdep.c b/usr.sbin/bhyve/aarch64/bhyverun_machdep.c
new file mode 100644
index 000000000000..9b0010a78b47
--- /dev/null
+++ b/usr.sbin/bhyve/aarch64/bhyverun_machdep.c
@@ -0,0 +1,245 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2011 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <vmmapi.h>
+
+#include "bhyverun.h"
+#include "config.h"
+#include "debug.h"
+#include "fdt.h"
+#include "mem.h"
+#include "uart_emul.h"
+
+/* Start of mem + 1M */
+#define FDT_BASE 0x100000
+#define FDT_SIZE (64 * 1024)
+
+/* Start of lowmem + 64K */
+#define UART_MMIO_BASE 0x10000
+#define UART_MMIO_SIZE 0x1000
+#define UART_INTR 32
+
+#define GIC_DIST_BASE 0x2f000000
+#define GIC_DIST_SIZE 0x10000
+#define GIC_REDIST_BASE 0x2f100000
+#define GIC_REDIST_SIZE(ncpu) ((ncpu) * 2 * PAGE_SIZE_64K)
+
+#define PCIE_INTR 33
+
+void
+bhyve_init_config(void)
+{
+ init_config();
+
+ /* Set default values prior to option parsing. */
+ set_config_bool("acpi_tables", false);
+ set_config_bool("acpi_tables_in_memory", false);
+ set_config_value("memory.size", "256M");
+}
+
+void
+bhyve_init_vcpu(struct vcpu *vcpu __unused)
+{
+}
+
+void
+bhyve_start_vcpu(struct vcpu *vcpu, bool bsp __unused)
+{
+ fbsdrun_addcpu(vcpu_id(vcpu));
+}
+
+/*
+ * Load the specified boot code at the beginning of high memory.
+ */
+static void
+load_bootrom(struct vmctx *ctx, const char *path, uint64_t *elrp)
+{
+ struct stat sb;
+ void *data, *gptr;
+ vm_paddr_t loadaddr;
+ off_t size;
+ int fd;
+
+ fd = open(path, O_RDONLY);
+ if (fd < 0)
+ err(1, "open(%s)", path);
+ if (fstat(fd, &sb) != 0)
+ err(1, "fstat(%s)", path);
+
+ size = sb.st_size;
+
+ loadaddr = vm_get_highmem_base(ctx);
+ gptr = vm_map_gpa(ctx, loadaddr, round_page(size));
+
+ data = mmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0);
+ if (data == MAP_FAILED)
+ err(1, "mmap(%s)", path);
+ (void)close(fd);
+ memcpy(gptr, data, size);
+
+ if (munmap(data, size) != 0)
+ err(1, "munmap(%s)", path);
+
+ *elrp = loadaddr;
+}
+
+static void
+mmio_uart_intr_assert(void *arg)
+{
+ struct vmctx *ctx = arg;
+
+ vm_assert_irq(ctx, UART_INTR);
+}
+
+static void
+mmio_uart_intr_deassert(void *arg)
+{
+ struct vmctx *ctx = arg;
+
+ vm_deassert_irq(ctx, UART_INTR);
+}
+
+static int
+mmio_uart_mem_handler(struct vcpu *vcpu __unused, int dir,
+ uint64_t addr, int size __unused, uint64_t *val, void *arg1, long arg2)
+{
+ struct uart_pl011_softc *sc = arg1;
+ long reg;
+
+ reg = (addr - arg2) >> 2;
+ if (dir == MEM_F_WRITE)
+ uart_pl011_write(sc, reg, *val);
+ else
+ *val = uart_pl011_read(sc, reg);
+
+ return (0);
+}
+
+static bool
+init_mmio_uart(struct vmctx *ctx)
+{
+ struct uart_pl011_softc *sc;
+ struct mem_range mr;
+ const char *path;
+ int error;
+
+ path = get_config_value("console");
+ if (path == NULL)
+ return (false);
+
+ sc = uart_pl011_init(mmio_uart_intr_assert, mmio_uart_intr_deassert,
+ ctx);
+ if (uart_pl011_tty_open(sc, path) != 0) {
+ EPRINTLN("Unable to initialize backend '%s' for mmio uart",
+ path);
+ assert(0);
+ }
+
+ bzero(&mr, sizeof(struct mem_range));
+ mr.name = "uart";
+ mr.base = UART_MMIO_BASE;
+ mr.size = UART_MMIO_SIZE;
+ mr.flags = MEM_F_RW;
+ mr.handler = mmio_uart_mem_handler;
+ mr.arg1 = sc;
+ mr.arg2 = mr.base;
+ error = register_mem(&mr);
+ assert(error == 0);
+
+ return (true);
+}
+
+static vm_paddr_t
+fdt_gpa(struct vmctx *ctx)
+{
+ return (vm_get_highmem_base(ctx) + FDT_BASE);
+}
+
+int
+bhyve_init_platform(struct vmctx *ctx, struct vcpu *bsp)
+{
+ const char *bootrom;
+ uint64_t elr;
+ int error;
+
+ bootrom = get_config_value("bootrom");
+ if (bootrom == NULL) {
+ warnx("no bootrom specified");
+ return (ENOENT);
+ }
+ load_bootrom(ctx, bootrom, &elr);
+ error = vm_set_register(bsp, VM_REG_GUEST_PC, elr);
+ if (error != 0) {
+ warn("vm_set_register(GUEST_PC)");
+ return (error);
+ }
+
+ error = fdt_init(ctx, guest_ncpus, fdt_gpa(ctx), FDT_SIZE);
+ if (error != 0)
+ return (error);
+
+ fdt_add_gic(GIC_DIST_BASE, GIC_DIST_SIZE, GIC_REDIST_BASE,
+ GIC_REDIST_SIZE(guest_ncpus));
+ error = vm_attach_vgic(ctx, GIC_DIST_BASE, GIC_DIST_SIZE,
+ GIC_REDIST_BASE, GIC_REDIST_SIZE(guest_ncpus));
+ if (error != 0) {
+ warn("vm_attach_vgic()");
+ return (error);
+ }
+
+ if (init_mmio_uart(ctx))
+ fdt_add_uart(UART_MMIO_BASE, UART_MMIO_SIZE, UART_INTR);
+ fdt_add_timer();
+ fdt_add_pcie(PCIE_INTR);
+
+ return (0);
+}
+
+int
+bhyve_init_platform_late(struct vmctx *ctx, struct vcpu *bsp __unused)
+{
+ int error;
+
+ fdt_finalize();
+
+ error = vm_set_register(bsp, VM_REG_GUEST_X0, fdt_gpa(ctx));
+ assert(error == 0);
+
+ return (0);
+}
diff --git a/usr.sbin/bhyve/aarch64/vmexit.c b/usr.sbin/bhyve/aarch64/vmexit.c
new file mode 100644
index 000000000000..0d328ab4ff85
--- /dev/null
+++ b/usr.sbin/bhyve/aarch64/vmexit.c
@@ -0,0 +1,260 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2011 NetApp, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/cpuset.h>
+
+#include <dev/psci/psci.h>
+#include <dev/psci/smccc.h>
+
+#include <machine/armreg.h>
+#include <machine/cpu.h>
+#include <machine/vmm.h>
+#include <machine/vmm_dev.h>
+#include <machine/vmm_instruction_emul.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <vmmapi.h>
+
+#include "bhyverun.h"
+#include "config.h"
+#include "debug.h"
+#include "mem.h"
+#include "vmexit.h"
+
+static cpuset_t running_cpumask;
+
+static int
+vmexit_inst_emul(struct vmctx *ctx __unused, struct vcpu *vcpu,
+ struct vm_run *vmrun)
+{
+ struct vm_exit *vme;
+ struct vie *vie;
+ int err;
+
+ vme = vmrun->vm_exit;
+ vie = &vme->u.inst_emul.vie;
+
+ err = emulate_mem(vcpu, vme->u.inst_emul.gpa, vie,
+ &vme->u.inst_emul.paging);
+ if (err) {
+ if (err == ESRCH) {
+ EPRINTLN("Unhandled memory access to 0x%lx\n",
+ vme->u.inst_emul.gpa);
+ }
+ goto fail;
+ }
+
+ return (VMEXIT_CONTINUE);
+
+fail:
+ fprintf(stderr, "Failed to emulate instruction ");
+ FPRINTLN(stderr, "at 0x%lx", vme->pc);
+ return (VMEXIT_ABORT);
+}
+
+static int
+vmexit_suspend(struct vmctx *ctx, struct vcpu *vcpu, struct vm_run *vmrun)
+{
+ struct vm_exit *vme;
+ enum vm_suspend_how how;
+ int vcpuid = vcpu_id(vcpu);
+
+ vme = vmrun->vm_exit;
+ how = vme->u.suspended.how;
+
+ fbsdrun_deletecpu(vcpuid);
+
+ switch (how) {
+ case VM_SUSPEND_RESET:
+ exit(0);
+ case VM_SUSPEND_POWEROFF:
+ if (get_config_bool_default("destroy_on_poweroff", false))
+ vm_destroy(ctx);
+ exit(1);
+ case VM_SUSPEND_HALT:
+ exit(2);
+ default:
+ fprintf(stderr, "vmexit_suspend: invalid reason %d\n", how);
+ exit(100);
+ }
+ return (0); /* NOTREACHED */
+}
+
+static int
+vmexit_debug(struct vmctx *ctx __unused, struct vcpu *vcpu __unused,
+ struct vm_run *vmrun __unused)
+{
+ return (VMEXIT_CONTINUE);
+}
+
+static int
+vmexit_bogus(struct vmctx *ctx __unused, struct vcpu *vcpu __unused,
+ struct vm_run *vmrun __unused)
+{
+ return (VMEXIT_CONTINUE);
+}
+
+static uint64_t
+smccc_affinity_info(uint64_t target_affinity, uint32_t lowest_affinity_level)
+{
+ uint64_t cpu_aff, mask = 0;
+
+ switch (lowest_affinity_level) {
+ case 0:
+ mask |= CPU_AFF0_MASK;
+ /* FALLTHROUGH */
+ case 1:
+ mask |= CPU_AFF1_MASK;
+ /* FALLTHROUGH */
+ case 2:
+ mask |= CPU_AFF2_MASK;
+ /* FALLTHROUGH */
+ case 3:
+ mask |= CPU_AFF3_MASK;
+ break;
+ default:
+ return (PSCI_RETVAL_INVALID_PARAMS);
+ }
+
+ for (int vcpu = 0; vcpu < guest_ncpus; vcpu++) {
+ /* TODO: We should get this from the kernel */
+ cpu_aff = (vcpu & 0xf) << MPIDR_AFF0_SHIFT |
+ ((vcpu >> 4) & 0xff) << MPIDR_AFF1_SHIFT |
+ ((vcpu >> 12) & 0xff) << MPIDR_AFF2_SHIFT |
+ (uint64_t)((vcpu >> 20) & 0xff) << MPIDR_AFF3_SHIFT;
+
+ if ((cpu_aff & mask) == (target_affinity & mask) &&
+ CPU_ISSET(vcpu, &running_cpumask)) {
+ /* Return ON if any CPUs are on */
+ return (PSCI_AFFINITY_INFO_ON);
+ }
+ }
+
+ /* No CPUs in the affinity mask are on, return OFF */
+ return (PSCI_AFFINITY_INFO_OFF);
+}
+
+static int
+vmexit_smccc(struct vmctx *ctx, struct vcpu *vcpu, struct vm_run *vmrun)
+{
+ struct vcpu *newvcpu;
+ struct vm_exit *vme;
+ uint64_t newcpu, smccc_rv;
+ enum vm_suspend_how how;
+ int error;
+
+ /* Return the Unknown Function Identifier by default */
+ smccc_rv = SMCCC_RET_NOT_SUPPORTED;
+
+ vme = vmrun->vm_exit;
+ switch (vme->u.smccc_call.func_id) {
+ case PSCI_FNID_VERSION:
+ /* We implement PSCI 1.0 */
+ smccc_rv = PSCI_VER(1, 0);
+ break;
+ case PSCI_FNID_CPU_SUSPEND:
+ case PSCI_FNID_CPU_OFF:
+ break;
+ case PSCI_FNID_CPU_ON:
+ newcpu = vme->u.smccc_call.args[0];
+ if (newcpu > (uint64_t)guest_ncpus) {
+ smccc_rv = PSCI_RETVAL_INVALID_PARAMS;
+ break;
+ }
+
+ if (CPU_ISSET(newcpu, &running_cpumask)) {
+ smccc_rv = PSCI_RETVAL_ALREADY_ON;
+ break;
+ }
+
+ newvcpu = fbsdrun_vcpu(newcpu);
+ assert(newvcpu != NULL);
+
+ /* Set the context ID */
+ error = vm_set_register(newvcpu, VM_REG_GUEST_X0,
+ vme->u.smccc_call.args[2]);
+ assert(error == 0);
+
+ /* Set the start program counter */
+ error = vm_set_register(newvcpu, VM_REG_GUEST_PC,
+ vme->u.smccc_call.args[1]);
+ assert(error == 0);
+
+ vm_resume_cpu(newvcpu);
+ CPU_SET_ATOMIC(newcpu, &running_cpumask);
+
+ smccc_rv = PSCI_RETVAL_SUCCESS;
+ break;
+ case PSCI_FNID_AFFINITY_INFO:
+ smccc_rv = smccc_affinity_info(vme->u.smccc_call.args[0],
+ vme->u.smccc_call.args[1]);
+ break;
+ case PSCI_FNID_SYSTEM_OFF:
+ case PSCI_FNID_SYSTEM_RESET:
+ if (vme->u.smccc_call.func_id == PSCI_FNID_SYSTEM_OFF)
+ how = VM_SUSPEND_POWEROFF;
+ else
+ how = VM_SUSPEND_RESET;
+ vm_suspend(ctx, how);
+ break;
+ default:
+ break;
+ }
+
+ error = vm_set_register(vcpu, VM_REG_GUEST_X0, smccc_rv);
+ assert(error == 0);
+
+ return (VMEXIT_CONTINUE);
+}
+
+static int
+vmexit_hyp(struct vmctx *ctx __unused, struct vcpu *vcpu __unused,
+ struct vm_run *vmrun)
+{
+ struct vm_exit *vme;
+
+ vme = vmrun->vm_exit;
+ printf("unhandled exception: esr %#lx, far %#lx\n",
+ vme->u.hyp.esr_el2, vme->u.hyp.far_el2);
+ return (VMEXIT_ABORT);
+}
+
+const vmexit_handler_t vmexit_handlers[VM_EXITCODE_MAX] = {
+ [VM_EXITCODE_BOGUS] = vmexit_bogus,
+ [VM_EXITCODE_INST_EMUL] = vmexit_inst_emul,
+ [VM_EXITCODE_SUSPENDED] = vmexit_suspend,
+ [VM_EXITCODE_DEBUG] = vmexit_debug,
+ [VM_EXITCODE_SMCCC] = vmexit_smccc,
+ [VM_EXITCODE_HYP] = vmexit_hyp,
+};
diff --git a/usr.sbin/bhyve/bhyverun.c b/usr.sbin/bhyve/bhyverun.c
index 8163ab0d810a..b9f00385d9e8 100644
--- a/usr.sbin/bhyve/bhyverun.c
+++ b/usr.sbin/bhyve/bhyverun.c
@@ -561,11 +561,12 @@ do_open(const char *vmname)
int error;
bool reinit, romboot;
- reinit = romboot = false;
+ reinit = false;
#ifdef __amd64__
- if (lpc_bootrom())
- romboot = true;
+ romboot = lpc_bootrom() != NULL;
+#else
+ romboot = true;
#endif
error = vm_create(vmname);