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arm64: uti: Add arch-dependent helper for context switch

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arm64 performs context-switch in kernel space instead of user space as in
x86_64.

Change-Id: Ib119b9ff014effb970183ee86cfac67fab773cba
Futjitsu: POSTK_DEBUG_ARCH_DEP_99
This commit is contained in:
Shiratori, Takehiro
2019-03-12 14:19:18 +09:00
committed by Masamichi Takagi
parent 63d500515a
commit 8356ef6c96
9 changed files with 91 additions and 47 deletions
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26
executer/kernel/mcctrl/control.c
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@ -319,17 +319,6 @@ struct mcos_handler_info;
static LIST_HEAD(host_threads); /* Used for FS switch */
DEFINE_RWLOCK(host_thread_lock);
/* Info of Linux counterpart of migrated-to-Linux thread */
struct host_thread {
struct list_head list;
struct mcos_handler_info *handler;
int pid;
int tid;
unsigned long usp;
unsigned long lfs;
unsigned long rfs;
};
struct mcos_handler_info *new_mcos_handler_info(ihk_os_t os, struct file *file)
{
struct mcos_handler_info *info;
@ -2492,7 +2481,8 @@ long mcexec_uti_get_ctx(ihk_os_t os, struct uti_get_ctx_desc __user *udesc)
return rc;
}
long mcexec_uti_save_fs(ihk_os_t os, struct uti_save_fs_desc __user *udesc, struct file *file)
long mcctrl_switch_ctx(ihk_os_t os, struct uti_save_fs_desc __user *udesc,
struct file *file)
{
int rc = 0;
void *usp = get_user_sp();
@ -2509,12 +2499,17 @@ long mcexec_uti_save_fs(ihk_os_t os, struct uti_save_fs_desc __user *udesc, stru
goto out;
}
if(copy_from_user(&desc, udesc, sizeof(struct uti_save_fs_desc))) {
if (copy_from_user(&desc, udesc, sizeof(struct uti_save_fs_desc))) {
printk("%s: Error: copy_from_user failed\n", __FUNCTION__);
rc = -EFAULT;
goto out;
}
rc = arch_switch_ctx(&desc);
if (rc < 0) {
goto out;
}
save_fs_ctx(desc.lctx);
info = ihk_os_get_mcos_private_data(file);
thread = kmalloc(sizeof(struct host_thread), GFP_KERNEL);
@ -3272,8 +3267,9 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
case MCEXEC_UP_UTI_GET_CTX:
return mcexec_uti_get_ctx(os, (struct uti_get_ctx_desc *)arg);
case MCEXEC_UP_UTI_SAVE_FS:
return mcexec_uti_save_fs(os, (struct uti_save_fs_desc *)arg, file);
case MCEXEC_UP_UTI_SWITCH_CTX:
return mcctrl_switch_ctx(os, (struct uti_save_fs_desc *)arg,
file);
case MCEXEC_UP_SIG_THREAD:
return mcexec_sig_thread(os, arg, file);