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-rw-r--r--arch/um/Kconfig1
-rw-r--r--arch/um/drivers/ubd_kern.c6
-rw-r--r--arch/um/drivers/virtio_uml.c3
-rw-r--r--arch/um/include/asm/io.h2
-rw-r--r--arch/um/include/asm/pgtable.h3
-rw-r--r--arch/um/include/asm/set_memory.h1
-rw-r--r--arch/um/include/shared/kern_util.h2
-rw-r--r--arch/um/kernel/kmsg_dump.c9
-rw-r--r--arch/um/kernel/process.c11
-rw-r--r--arch/um/kernel/time.c50
-rw-r--r--arch/um/kernel/tlb.c54
-rw-r--r--arch/um/kernel/um_arch.c22
-rw-r--r--arch/um/os-Linux/helper.c4
-rw-r--r--arch/um/os-Linux/time.c15
14 files changed, 84 insertions, 99 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 34d302d1a07f..c3030db3325f 100644
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -15,7 +15,6 @@ config UML
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_BUGVERBOSE
select NO_DMA
- select ARCH_HAS_SET_MEMORY
select GENERIC_IRQ_SHOW
select GENERIC_CPU_DEVICES
select HAVE_GCC_PLUGINS
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
index 13b1fe694b90..8e0b43cf089f 100644
--- a/arch/um/drivers/ubd_kern.c
+++ b/arch/um/drivers/ubd_kern.c
@@ -375,11 +375,11 @@ break_loop:
file = NULL;
backing_file = strsep(&str, ",:");
- if (*backing_file == '\0')
+ if (backing_file && *backing_file == '\0')
backing_file = NULL;
serial = strsep(&str, ",:");
- if (*serial == '\0')
+ if (serial && *serial == '\0')
serial = NULL;
if (backing_file && ubd_dev->no_cow) {
@@ -1241,7 +1241,7 @@ static int __init ubd_driver_init(void){
/* Letting ubd=sync be like using ubd#s= instead of ubd#= is
* enough. So use anyway the io thread. */
}
- stack = alloc_stack(0);
+ stack = alloc_stack(0, 0);
io_pid = start_io_thread(stack + PAGE_SIZE - sizeof(void *),
&thread_fd);
if(io_pid < 0){
diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
index 27e92d3881ff..5d957b7e7fd5 100644
--- a/arch/um/drivers/virtio_uml.c
+++ b/arch/um/drivers/virtio_uml.c
@@ -1084,6 +1084,7 @@ static void virtio_uml_release_dev(struct device *d)
}
os_close_file(vu_dev->sock);
+ kfree(vu_dev);
}
/* Platform device */
@@ -1097,7 +1098,7 @@ static int virtio_uml_probe(struct platform_device *pdev)
if (!pdata)
return -EINVAL;
- vu_dev = devm_kzalloc(&pdev->dev, sizeof(*vu_dev), GFP_KERNEL);
+ vu_dev = kzalloc(sizeof(*vu_dev), GFP_KERNEL);
if (!vu_dev)
return -ENOMEM;
diff --git a/arch/um/include/asm/io.h b/arch/um/include/asm/io.h
index 96f77b5232aa..cef03e3aa0f9 100644
--- a/arch/um/include/asm/io.h
+++ b/arch/um/include/asm/io.h
@@ -5,7 +5,7 @@
#define ioremap ioremap
static inline void __iomem *ioremap(phys_addr_t offset, size_t size)
{
- return (void __iomem *)(unsigned long)offset;
+ return NULL;
}
#define iounmap iounmap
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
index 39376bb63abf..def376194dce 100644
--- a/arch/um/include/asm/pgtable.h
+++ b/arch/um/include/asm/pgtable.h
@@ -55,15 +55,12 @@ extern unsigned long end_iomem;
#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
#define __PAGE_KERNEL_EXEC \
(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
-#define __PAGE_KERNEL_RO \
- (_PAGE_PRESENT | _PAGE_DIRTY | _PAGE_ACCESSED)
#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
-#define PAGE_KERNEL_RO __pgprot(__PAGE_KERNEL_RO)
/*
* The i386 can't do page protection for execute, and considers that the same
diff --git a/arch/um/include/asm/set_memory.h b/arch/um/include/asm/set_memory.h
deleted file mode 100644
index 24266c63720d..000000000000
--- a/arch/um/include/asm/set_memory.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/set_memory.h>
diff --git a/arch/um/include/shared/kern_util.h b/arch/um/include/shared/kern_util.h
index d8c279e3312f..2888ec812f6e 100644
--- a/arch/um/include/shared/kern_util.h
+++ b/arch/um/include/shared/kern_util.h
@@ -19,7 +19,7 @@ extern int kmalloc_ok;
#define UML_ROUND_UP(addr) \
((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
-extern unsigned long alloc_stack(int atomic);
+extern unsigned long alloc_stack(int order, int atomic);
extern void free_stack(unsigned long stack, int order);
struct pt_regs;
diff --git a/arch/um/kernel/kmsg_dump.c b/arch/um/kernel/kmsg_dump.c
index e4abac6c9727..6516ef1f8274 100644
--- a/arch/um/kernel/kmsg_dump.c
+++ b/arch/um/kernel/kmsg_dump.c
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include <linux/kmsg_dump.h>
#include <linux/console.h>
+#include <linux/string.h>
#include <shared/init.h>
#include <shared/kern.h>
#include <os.h>
@@ -16,8 +17,12 @@ static void kmsg_dumper_stdout(struct kmsg_dumper *dumper,
if (!console_trylock())
return;
- for_each_console(con)
- break;
+ for_each_console(con) {
+ if(strcmp(con->name, "tty") == 0 &&
+ (con->flags & (CON_ENABLED | CON_CONSDEV)) != 0) {
+ break;
+ }
+ }
console_unlock();
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 2a986ece5478..81d508daf67c 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -32,7 +32,6 @@
#include <os.h>
#include <skas.h>
#include <linux/time-internal.h>
-#include <asm/set_memory.h>
/*
* This is a per-cpu array. A processor only modifies its entry and it only
@@ -63,18 +62,16 @@ void free_stack(unsigned long stack, int order)
free_pages(stack, order);
}
-unsigned long alloc_stack(int atomic)
+unsigned long alloc_stack(int order, int atomic)
{
- unsigned long addr;
+ unsigned long page;
gfp_t flags = GFP_KERNEL;
if (atomic)
flags = GFP_ATOMIC;
- addr = __get_free_pages(flags, 1);
+ page = __get_free_pages(flags, order);
- set_memory_ro(addr, 1);
-
- return addr + PAGE_SIZE;
+ return page;
}
static inline void set_current(struct task_struct *task)
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index f4db89b5b5a6..315248b03941 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -535,6 +535,31 @@ invalid_number:
return 1;
}
+
+static void time_travel_set_start(void)
+{
+ if (time_travel_start_set)
+ return;
+
+ switch (time_travel_mode) {
+ case TT_MODE_EXTERNAL:
+ time_travel_start = time_travel_ext_req(UM_TIMETRAVEL_GET_TOD, -1);
+ /* controller gave us the *current* time, so adjust by that */
+ time_travel_ext_get_time();
+ time_travel_start -= time_travel_time;
+ break;
+ case TT_MODE_INFCPU:
+ case TT_MODE_BASIC:
+ if (!time_travel_start_set)
+ time_travel_start = os_persistent_clock_emulation();
+ break;
+ case TT_MODE_OFF:
+ /* we just read the host clock with os_persistent_clock_emulation() */
+ break;
+ }
+
+ time_travel_start_set = true;
+}
#else /* CONFIG_UML_TIME_TRAVEL_SUPPORT */
#define time_travel_start_set 0
#define time_travel_start 0
@@ -553,6 +578,10 @@ static void time_travel_set_interval(unsigned long long interval)
{
}
+static inline void time_travel_set_start(void)
+{
+}
+
/* fail link if this actually gets used */
extern u64 time_travel_ext_req(u32 op, u64 time);
@@ -731,6 +760,8 @@ void read_persistent_clock64(struct timespec64 *ts)
{
long long nsecs;
+ time_travel_set_start();
+
if (time_travel_mode != TT_MODE_OFF)
nsecs = time_travel_start + time_travel_time;
else
@@ -742,25 +773,6 @@ void read_persistent_clock64(struct timespec64 *ts)
void __init time_init(void)
{
-#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
- switch (time_travel_mode) {
- case TT_MODE_EXTERNAL:
- time_travel_start = time_travel_ext_req(UM_TIMETRAVEL_GET_TOD, -1);
- /* controller gave us the *current* time, so adjust by that */
- time_travel_ext_get_time();
- time_travel_start -= time_travel_time;
- break;
- case TT_MODE_INFCPU:
- case TT_MODE_BASIC:
- if (!time_travel_start_set)
- time_travel_start = os_persistent_clock_emulation();
- break;
- case TT_MODE_OFF:
- /* we just read the host clock with os_persistent_clock_emulation() */
- break;
- }
-#endif
-
timer_set_signal_handler();
late_time_init = um_timer_setup;
}
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 437d1f1cc5ec..61776790cd67 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -608,57 +608,3 @@ void force_flush_all(void)
vma = vma->vm_next;
}
}
-
-struct page_change_data {
- unsigned int set_mask, clear_mask;
-};
-
-static int change_page_range(pte_t *ptep, unsigned long addr, void *data)
-{
- struct page_change_data *cdata = data;
- pte_t pte = READ_ONCE(*ptep);
-
- pte_clear_bits(pte, cdata->clear_mask);
- pte_set_bits(pte, cdata->set_mask);
-
- set_pte(ptep, pte);
- return 0;
-}
-
-static int change_memory(unsigned long start, unsigned long pages,
- unsigned int set_mask, unsigned int clear_mask)
-{
- unsigned long size = pages * PAGE_SIZE;
- struct page_change_data data;
- int ret;
-
- data.set_mask = set_mask;
- data.clear_mask = clear_mask;
-
- ret = apply_to_page_range(&init_mm, start, size, change_page_range,
- &data);
-
- flush_tlb_kernel_range(start, start + size);
-
- return ret;
-}
-
-int set_memory_ro(unsigned long addr, int numpages)
-{
- return change_memory(addr, numpages, 0, _PAGE_RW);
-}
-
-int set_memory_rw(unsigned long addr, int numpages)
-{
- return change_memory(addr, numpages, _PAGE_RW, 0);
-}
-
-int set_memory_nx(unsigned long addr, int numpages)
-{
- return -EOPNOTSUPP;
-}
-
-int set_memory_x(unsigned long addr, int numpages)
-{
- return -EOPNOTSUPP;
-}
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index 31d356b1ffd8..80e2660782a0 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -26,7 +26,8 @@
#include <mem_user.h>
#include <os.h>
-#define DEFAULT_COMMAND_LINE "root=98:0"
+#define DEFAULT_COMMAND_LINE_ROOT "root=98:0"
+#define DEFAULT_COMMAND_LINE_CONSOLE "console=tty"
/* Changed in add_arg and setup_arch, which run before SMP is started */
static char __initdata command_line[COMMAND_LINE_SIZE] = { 0 };
@@ -109,7 +110,8 @@ unsigned long end_vm;
int ncpus = 1;
/* Set in early boot */
-static int have_root __initdata = 0;
+static int have_root __initdata;
+static int have_console __initdata;
/* Set in uml_mem_setup and modified in linux_main */
long long physmem_size = 32 * 1024 * 1024;
@@ -161,6 +163,17 @@ __uml_setup("debug", no_skas_debug_setup,
" this flag is not needed to run gdb on UML in skas mode\n\n"
);
+static int __init uml_console_setup(char *line, int *add)
+{
+ have_console = 1;
+ return 0;
+}
+
+__uml_setup("console=", uml_console_setup,
+"console=<preferred console>\n"
+" Specify the preferred console output driver\n\n"
+);
+
static int __init Usage(char *line, int *add)
{
const char **p;
@@ -264,7 +277,10 @@ int __init linux_main(int argc, char **argv)
add_arg(argv[i]);
}
if (have_root == 0)
- add_arg(DEFAULT_COMMAND_LINE);
+ add_arg(DEFAULT_COMMAND_LINE_ROOT);
+
+ if (have_console == 0)
+ add_arg(DEFAULT_COMMAND_LINE_CONSOLE);
host_task_size = os_get_top_address();
/*
diff --git a/arch/um/os-Linux/helper.c b/arch/um/os-Linux/helper.c
index feb48d796e00..9fa6e4187d4f 100644
--- a/arch/um/os-Linux/helper.c
+++ b/arch/um/os-Linux/helper.c
@@ -45,7 +45,7 @@ int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv)
unsigned long stack, sp;
int pid, fds[2], ret, n;
- stack = alloc_stack(__cant_sleep());
+ stack = alloc_stack(0, __cant_sleep());
if (stack == 0)
return -ENOMEM;
@@ -116,7 +116,7 @@ int run_helper_thread(int (*proc)(void *), void *arg, unsigned int flags,
unsigned long stack, sp;
int pid, status, err;
- stack = alloc_stack(__cant_sleep());
+ stack = alloc_stack(0, __cant_sleep());
if (stack == 0)
return -ENOMEM;
diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index a61cbf73a179..6c5041c5560b 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -104,5 +104,18 @@ long long os_nsecs(void)
*/
void os_idle_sleep(void)
{
- pause();
+ struct itimerspec its;
+ sigset_t set, old;
+
+ /* block SIGALRM while we analyze the timer state */
+ sigemptyset(&set);
+ sigaddset(&set, SIGALRM);
+ sigprocmask(SIG_BLOCK, &set, &old);
+
+ /* check the timer, and if it'll fire then wait for it */
+ timer_gettime(event_high_res_timer, &its);
+ if (its.it_value.tv_sec || its.it_value.tv_nsec)
+ sigsuspend(&old);
+ /* either way, restore the signal mask */
+ sigprocmask(SIG_UNBLOCK, &set, NULL);
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-16 11:57:41 +0300