diff options
Diffstat (limited to 'arch/um/kernel')
| -rw-r--r-- | arch/um/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/dtb.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/irq.c | 5 | ||||
| -rw-r--r-- | arch/um/kernel/mem.c | 13 | ||||
| -rw-r--r-- | arch/um/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/um/kernel/time.c | 37 | ||||
| -rw-r--r-- | arch/um/kernel/um_arch.c | 7 |
7 files changed, 39 insertions, 29 deletions
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 */ |