summaryrefslogtreecommitdiff
path: root/arch/um
diff options
context:
space:
mode:
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/Kconfig2
-rw-r--r--arch/um/drivers/ssl.c5
-rw-r--r--arch/um/drivers/ubd_kern.c8
-rw-r--r--arch/um/drivers/vector_kern.c2
-rw-r--r--arch/um/drivers/virtio_pcidev.c6
-rw-r--r--arch/um/drivers/virtio_uml.c6
-rw-r--r--arch/um/include/asm/kasan.h5
-rw-r--r--arch/um/include/asm/mmu_context.h11
-rw-r--r--arch/um/include/asm/processor-generic.h3
-rw-r--r--arch/um/include/shared/as-layout.h5
-rw-r--r--arch/um/include/shared/skas/stub-data.h3
-rw-r--r--arch/um/kernel/asm-offsets.c2
-rw-r--r--arch/um/kernel/dtb.c2
-rw-r--r--arch/um/kernel/irq.c5
-rw-r--r--arch/um/kernel/mem.c13
-rw-r--r--arch/um/kernel/process.c2
-rw-r--r--arch/um/kernel/time.c37
-rw-r--r--arch/um/kernel/um_arch.c7
-rw-r--r--arch/um/os-Linux/file.c2
-rw-r--r--arch/um/os-Linux/skas/process.c2
-rw-r--r--arch/um/os-Linux/util.c3
21 files changed, 69 insertions, 62 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 9083bfdb7735..49781bee7905 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -5,6 +5,7 @@ menu "UML-specific options"
config UML
bool
default y
+ select ARCH_NEEDS_DEFER_KASAN if STATIC_LINK
select ARCH_WANTS_DYNAMIC_TASK_STRUCT
select ARCH_HAS_CACHE_LINE_SIZE
select ARCH_HAS_CPU_FINALIZE_INIT
@@ -38,6 +39,7 @@ config UML
select HAVE_ARCH_TRACEHOOK
select HAVE_SYSCALL_TRACEPOINTS
select THREAD_INFO_IN_TASK
+ select SPARSE_IRQ
config MMU
bool
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
index 277cea3d30eb..8006a5bd578c 100644
--- a/arch/um/drivers/ssl.c
+++ b/arch/um/drivers/ssl.c
@@ -199,4 +199,7 @@ static int ssl_non_raw_setup(char *str)
return 1;
}
__setup("ssl-non-raw", ssl_non_raw_setup);
-__channel_help(ssl_non_raw_setup, "set serial lines to non-raw mode");
+__uml_help(ssl_non_raw_setup,
+"ssl-non-raw\n"
+" Set serial lines to non-raw mode.\n\n"
+);
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 4de6613e7468..37455e74d314 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -108,7 +108,7 @@ static DEFINE_MUTEX(ubd_lock);
static int ubd_ioctl(struct block_device *bdev, blk_mode_t mode,
unsigned int cmd, unsigned long arg);
-static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
+static int ubd_getgeo(struct gendisk *disk, struct hd_geometry *geo);
#define MAX_DEV (16)
@@ -370,7 +370,7 @@ __uml_help(ubd_setup,
" useful when a unique number should be given to the device. Note when\n"
" specifying a label, the filename2 must be also presented. It can be\n"
" an empty string, in which case the backing file is not used:\n"
-" ubd0=File,,Serial\n"
+" ubd0=File,,Serial\n\n"
);
static int udb_setup(char *str)
@@ -1324,9 +1324,9 @@ static blk_status_t ubd_queue_rq(struct blk_mq_hw_ctx *hctx,
return res;
}
-static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+static int ubd_getgeo(struct gendisk *disk, struct hd_geometry *geo)
{
- struct ubd *ubd_dev = bdev->bd_disk->private_data;
+ struct ubd *ubd_dev = disk->private_data;
geo->heads = 128;
geo->sectors = 32;
diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c
index 9bbbddfe866b..25d9258fa592 100644
--- a/arch/um/drivers/vector_kern.c
+++ b/arch/um/drivers/vector_kern.c
@@ -1721,7 +1721,7 @@ static int __init vector_setup(char *str)
__setup("vec", vector_setup);
__uml_help(vector_setup,
"vec[0-9]+:<option>=<value>,<option>=<value>\n"
-" Configure a vector io network device.\n\n"
+" Configure a vector io network device.\n\n"
);
late_initcall(vector_init);
diff --git a/arch/um/drivers/virtio_pcidev.c b/arch/um/drivers/virtio_pcidev.c
index e9e23cc3f357..f9b4b6f7582c 100644
--- a/arch/um/drivers/virtio_pcidev.c
+++ b/arch/um/drivers/virtio_pcidev.c
@@ -598,6 +598,11 @@ static void virtio_pcidev_virtio_remove(struct virtio_device *vdev)
kfree(dev);
}
+static void virtio_pcidev_virtio_shutdown(struct virtio_device *vdev)
+{
+ /* nothing to do, we just don't want queue shutdown */
+}
+
static struct virtio_device_id id_table[] = {
{ CONFIG_UML_PCI_OVER_VIRTIO_DEVICE_ID, VIRTIO_DEV_ANY_ID },
{ 0 },
@@ -609,6 +614,7 @@ static struct virtio_driver virtio_pcidev_virtio_driver = {
.id_table = id_table,
.probe = virtio_pcidev_virtio_probe,
.remove = virtio_pcidev_virtio_remove,
+ .shutdown = virtio_pcidev_virtio_shutdown,
};
static int __init virtio_pcidev_init(void)
diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
index ad8d78fb1d9a..de7867ae220d 100644
--- a/arch/um/drivers/virtio_uml.c
+++ b/arch/um/drivers/virtio_uml.c
@@ -1250,10 +1250,12 @@ static int virtio_uml_probe(struct platform_device *pdev)
device_set_wakeup_capable(&vu_dev->vdev.dev, true);
rc = register_virtio_device(&vu_dev->vdev);
- if (rc)
+ if (rc) {
put_device(&vu_dev->vdev.dev);
+ return rc;
+ }
vu_dev->registered = 1;
- return rc;
+ return 0;
error_init:
os_close_file(vu_dev->sock);
diff --git a/arch/um/include/asm/kasan.h b/arch/um/include/asm/kasan.h
index f97bb1f7b851..b54a4e937fd1 100644
--- a/arch/um/include/asm/kasan.h
+++ b/arch/um/include/asm/kasan.h
@@ -24,10 +24,9 @@
#ifdef CONFIG_KASAN
void kasan_init(void);
-extern int kasan_um_is_ready;
-#ifdef CONFIG_STATIC_LINK
-#define kasan_arch_is_ready() (kasan_um_is_ready)
+#if defined(CONFIG_STATIC_LINK) && defined(CONFIG_KASAN_INLINE)
+#error UML does not work in KASAN_INLINE mode with STATIC_LINK enabled!
#endif
#else
static inline void kasan_init(void) { }
diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
index 0bbb24868557..c727e56ba116 100644
--- a/arch/um/include/asm/mmu_context.h
+++ b/arch/um/include/asm/mmu_context.h
@@ -13,20 +13,9 @@
#include <asm/mm_hooks.h>
#include <asm/mmu.h>
-#define activate_mm activate_mm
-static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
-{
-}
-
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
struct task_struct *tsk)
{
- unsigned cpu = smp_processor_id();
-
- if (prev != next) {
- cpumask_clear_cpu(cpu, mm_cpumask(prev));
- cpumask_set_cpu(cpu, mm_cpumask(next));
- }
}
#define init_new_context init_new_context
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h
index 8a789c17acd8..7854d51b6639 100644
--- a/arch/um/include/asm/processor-generic.h
+++ b/arch/um/include/asm/processor-generic.h
@@ -71,7 +71,6 @@ extern void start_thread(struct pt_regs *regs, unsigned long entry,
struct cpuinfo_um {
unsigned long loops_per_jiffy;
- int ipi_pipe[2];
int cache_alignment;
union {
__u32 x86_capability[NCAPINTS + NBUGINTS];
@@ -81,8 +80,6 @@ struct cpuinfo_um {
extern struct cpuinfo_um boot_cpu_data;
-#define cpu_data(cpu) boot_cpu_data
-#define current_cpu_data boot_cpu_data
#define cache_line_size() (boot_cpu_data.cache_alignment)
#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
diff --git a/arch/um/include/shared/as-layout.h b/arch/um/include/shared/as-layout.h
index 2f9bfd99460a..7c7e17bce403 100644
--- a/arch/um/include/shared/as-layout.h
+++ b/arch/um/include/shared/as-layout.h
@@ -23,8 +23,9 @@
#define STUB_START stub_start
#define STUB_CODE STUB_START
#define STUB_DATA (STUB_CODE + UM_KERN_PAGE_SIZE)
-#define STUB_DATA_PAGES 2 /* must be a power of two */
-#define STUB_END (STUB_DATA + STUB_DATA_PAGES * UM_KERN_PAGE_SIZE)
+#define STUB_DATA_PAGES 2
+#define STUB_SIZE ((1 + STUB_DATA_PAGES) * UM_KERN_PAGE_SIZE)
+#define STUB_END (STUB_START + STUB_SIZE)
#ifndef __ASSEMBLER__
diff --git a/arch/um/include/shared/skas/stub-data.h b/arch/um/include/shared/skas/stub-data.h
index c261a77a32f6..27db38e95df9 100644
--- a/arch/um/include/shared/skas/stub-data.h
+++ b/arch/um/include/shared/skas/stub-data.h
@@ -53,8 +53,7 @@ struct stub_syscall {
};
struct stub_data {
- unsigned long offset;
- long err, child_err;
+ long err;
int syscall_data_len;
/* 128 leaves enough room for additional fields in the struct */
diff --git a/arch/um/kernel/asm-offsets.c b/arch/um/kernel/asm-offsets.c
index 1fb12235ab9c..a69873aa697f 100644
--- a/arch/um/kernel/asm-offsets.c
+++ b/arch/um/kernel/asm-offsets.c
@@ -1 +1,3 @@
+#define COMPILE_OFFSETS
+
#include <sysdep/kernel-offsets.h>
diff --git a/arch/um/kernel/dtb.c b/arch/um/kernel/dtb.c
index 15c342426489..47cd3d869fb2 100644
--- a/arch/um/kernel/dtb.c
+++ b/arch/um/kernel/dtb.c
@@ -38,5 +38,5 @@ static int __init uml_dtb_setup(char *line, int *add)
__uml_setup("dtb=", uml_dtb_setup,
"dtb=<file>\n"
-" Boot the kernel with the devicetree blob from the specified file.\n"
+" Boot the kernel with the devicetree blob from the specified file.\n\n"
);
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 0dfaf96bb7da..d69d137a0334 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -691,6 +691,11 @@ void __init init_IRQ(void)
os_setup_epoll();
}
+int __init arch_probe_nr_irqs(void)
+{
+ return NR_IRQS;
+}
+
void sigchld_handler(int sig, struct siginfo *unused_si,
struct uml_pt_regs *regs, void *mc)
{
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 76bec7de81b5..32e3b1972dc1 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -21,10 +21,10 @@
#include <os.h>
#include <um_malloc.h>
#include <linux/sched/task.h>
+#include <linux/kasan.h>
#ifdef CONFIG_KASAN
-int kasan_um_is_ready;
-void kasan_init(void)
+void __init kasan_init(void)
{
/*
* kasan_map_memory will map all of the required address space and
@@ -32,7 +32,11 @@ void kasan_init(void)
*/
kasan_map_memory((void *)KASAN_SHADOW_START, KASAN_SHADOW_SIZE);
init_task.kasan_depth = 0;
- kasan_um_is_ready = true;
+ /*
+ * Since kasan_init() is called before main(),
+ * KASAN is initialized but the enablement is deferred after
+ * jump_label_init(). See arch_mm_preinit().
+ */
}
static void (*kasan_init_ptr)(void)
@@ -58,6 +62,9 @@ static unsigned long brk_end;
void __init arch_mm_preinit(void)
{
+ /* Safe to call after jump_label_init(). Enables KASAN. */
+ kasan_init_generic();
+
/* clear the zero-page */
memset(empty_zero_page, 0, PAGE_SIZE);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 1be644de9e41..9c9c66dc45f0 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -143,7 +143,7 @@ static void fork_handler(void)
int copy_thread(struct task_struct * p, const struct kernel_clone_args *args)
{
- unsigned long clone_flags = args->flags;
+ u64 clone_flags = args->flags;
unsigned long sp = args->stack;
unsigned long tls = args->tls;
void (*handler)(void);
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index ae0fa2173778..17da0a870650 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -986,26 +986,26 @@ static int setup_time_travel(char *str)
__setup("time-travel", setup_time_travel);
__uml_help(setup_time_travel,
"time-travel\n"
-"This option just enables basic time travel mode, in which the clock/timers\n"
-"inside the UML instance skip forward when there's nothing to do, rather than\n"
-"waiting for real time to elapse. However, instance CPU speed is limited by\n"
-"the real CPU speed, so e.g. a 10ms timer will always fire after ~10ms wall\n"
-"clock (but quicker when there's nothing to do).\n"
+" This option just enables basic time travel mode, in which the clock/timers\n"
+" inside the UML instance skip forward when there's nothing to do, rather than\n"
+" waiting for real time to elapse. However, instance CPU speed is limited by\n"
+" the real CPU speed, so e.g. a 10ms timer will always fire after ~10ms wall\n"
+" clock (but quicker when there's nothing to do).\n"
"\n"
"time-travel=inf-cpu\n"
-"This enables time travel mode with infinite processing power, in which there\n"
-"are no wall clock timers, and any CPU processing happens - as seen from the\n"
-"guest - instantly. This can be useful for accurate simulation regardless of\n"
-"debug overhead, physical CPU speed, etc. but is somewhat dangerous as it can\n"
-"easily lead to getting stuck (e.g. if anything in the system busy loops).\n"
+" This enables time travel mode with infinite processing power, in which there\n"
+" are no wall clock timers, and any CPU processing happens - as seen from the\n"
+" guest - instantly. This can be useful for accurate simulation regardless of\n"
+" debug overhead, physical CPU speed, etc. but is somewhat dangerous as it can\n"
+" easily lead to getting stuck (e.g. if anything in the system busy loops).\n"
"\n"
"time-travel=ext:[ID:]/path/to/socket\n"
-"This enables time travel mode similar to =inf-cpu, except the system will\n"
-"use the given socket to coordinate with a central scheduler, in order to\n"
-"have more than one system simultaneously be on simulated time. The virtio\n"
-"driver code in UML knows about this so you can also simulate networks and\n"
-"devices using it, assuming the device has the right capabilities.\n"
-"The optional ID is a 64-bit integer that's sent to the central scheduler.\n");
+" This enables time travel mode similar to =inf-cpu, except the system will\n"
+" use the given socket to coordinate with a central scheduler, in order to\n"
+" have more than one system simultaneously be on simulated time. The virtio\n"
+" driver code in UML knows about this so you can also simulate networks and\n"
+" devices using it, assuming the device has the right capabilities.\n"
+" The optional ID is a 64-bit integer that's sent to the central scheduler.\n\n");
static int setup_time_travel_start(char *str)
{
@@ -1022,8 +1022,9 @@ static int setup_time_travel_start(char *str)
__setup("time-travel-start=", setup_time_travel_start);
__uml_help(setup_time_travel_start,
"time-travel-start=<nanoseconds>\n"
-"Configure the UML instance's wall clock to start at this value rather than\n"
-"the host's wall clock at the time of UML boot.\n");
+" Configure the UML instance's wall clock to start at this value rather than\n"
+" the host's wall clock at the time of UML boot.\n\n");
+
static struct kobject *bc_time_kobject;
static ssize_t bc_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 2f5ee045bc7a..cfbbbf8500c3 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -54,12 +54,9 @@ static void __init add_arg(char *arg)
/*
* These fields are initialized at boot time and not changed.
- * XXX This structure is used only in the non-SMP case. Maybe this
- * should be moved to smp.c.
*/
struct cpuinfo_um boot_cpu_data = {
.loops_per_jiffy = 0,
- .ipi_pipe = { -1, -1 },
.cache_alignment = L1_CACHE_BYTES,
.x86_capability = { 0 }
};
@@ -331,9 +328,7 @@ int __init linux_main(int argc, char **argv, char **envp)
host_task_size = get_top_address(envp);
/* reserve a few pages for the stubs */
- stub_start = host_task_size - STUB_DATA_PAGES * PAGE_SIZE;
- /* another page for the code portion */
- stub_start -= PAGE_SIZE;
+ stub_start = host_task_size - STUB_SIZE;
host_task_size = stub_start;
/* Limit TASK_SIZE to what is addressable by the page table */
diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c
index 617886d1fb1e..21f0e50fb1df 100644
--- a/arch/um/os-Linux/file.c
+++ b/arch/um/os-Linux/file.c
@@ -535,7 +535,7 @@ ssize_t os_rcv_fd_msg(int fd, int *fds, unsigned int n_fds,
cmsg->cmsg_type != SCM_RIGHTS)
return n;
- memcpy(fds, CMSG_DATA(cmsg), cmsg->cmsg_len);
+ memcpy(fds, CMSG_DATA(cmsg), cmsg->cmsg_len - CMSG_LEN(0));
return n;
}
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 78f48fa9db8b..0bc10cd4cbed 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -895,7 +895,7 @@ __uml_setup("noreboot", noreboot_cmd_param,
"noreboot\n"
" Rather than rebooting, exit always, akin to QEMU's -no-reboot option.\n"
" This is useful if you're using CONFIG_PANIC_TIMEOUT in order to catch\n"
-" crashes in CI\n");
+" crashes in CI\n\n");
void reboot_skas(void)
{
diff --git a/arch/um/os-Linux/util.c b/arch/um/os-Linux/util.c
index 4193e04d7e4a..e3ad71a0d13c 100644
--- a/arch/um/os-Linux/util.c
+++ b/arch/um/os-Linux/util.c
@@ -20,8 +20,7 @@
void stack_protections(unsigned long address)
{
- if (mprotect((void *) address, UM_THREAD_SIZE,
- PROT_READ | PROT_WRITE | PROT_EXEC) < 0)
+ if (mprotect((void *) address, UM_THREAD_SIZE, PROT_READ | PROT_WRITE) < 0)
panic("protecting stack failed, errno = %d", errno);
}
generated by cgit (git 2.34.1) at 2025-10-07 22:36:12 +0000