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prctl: Add support for PR_SET_THP_DISABLE and PR_GET_THP_DISABLE

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Change-Id: I04c5568a9eb78bcac632b734f34bba49cf602c4d
Refs: #1181
This commit is contained in:
Ken Sato
2018-12-12 15:41:32 +09:00
committed by Masamichi Takagi
parent eb184419ea
commit dfd23c3ebe
24 changed files with 773 additions and 1 deletions
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3
arch/arm64/kernel/include/prctl.h
View File

@ -2,6 +2,9 @@
#ifndef __HEADER_ARM64_COMMON_PRCTL_H
#define __HEADER_ARM64_COMMON_PRCTL_H
#define PR_SET_THP_DISABLE 41
#define PR_GET_THP_DISABLE 42
/* arm64 Scalable Vector Extension controls */
#define PR_SVE_SET_VL 48 /* set task vector length */
#define PR_SVE_SET_VL_THREAD (1 << 1) /* set just this thread */

18
arch/arm64/kernel/syscall.c
View File

@ -161,7 +161,12 @@ fault:
SYSCALL_DECLARE(prctl)
{
struct process *proc = cpu_local_var(current)->proc;
int option = (int)ihk_mc_syscall_arg0(ctx);
unsigned long arg2 = (unsigned long)ihk_mc_syscall_arg1(ctx);
unsigned long arg3 = (unsigned long)ihk_mc_syscall_arg2(ctx);
unsigned long arg4 = (unsigned long)ihk_mc_syscall_arg3(ctx);
unsigned long arg5 = (unsigned long)ihk_mc_syscall_arg4(ctx);
long error;
switch (option) {
@ -172,6 +177,19 @@ SYSCALL_DECLARE(prctl)
case PR_SVE_GET_VL:
error = SVE_GET_VL(cpu_local_var(current));
break;
case PR_SET_THP_DISABLE:
if (arg3 || arg4 || arg5) {
return -EINVAL;
}
proc->thp_disable = arg2;
error = 0;
break;
case PR_GET_THP_DISABLE:
if (arg2 || arg3 || arg4 || arg5) {
return -EINVAL;
}
error = proc->thp_disable;
break;
default:
error = syscall_generic_forwarding(__NR_prctl, ctx);
break;

3
arch/x86_64/kernel/include/prctl.h
View File

@ -9,6 +9,9 @@
#ifndef __ARCH_PRCTL_H
#define __ARCH_PRCTL_H
#define PR_SET_THP_DISABLE 41
#define PR_GET_THP_DISABLE 42
#define ARCH_SET_GS 0x1001
#define ARCH_SET_FS 0x1002
#define ARCH_GET_FS 0x1003

1
arch/x86_64/kernel/include/syscall_list.h
View File

@ -109,6 +109,7 @@ SYSCALL_HANDLED(149, mlock)
SYSCALL_HANDLED(150, munlock)
SYSCALL_HANDLED(151, mlockall)
SYSCALL_HANDLED(152, munlockall)
SYSCALL_HANDLED(157, prctl)
SYSCALL_HANDLED(158, arch_prctl)
SYSCALL_HANDLED(160, setrlimit)
SYSCALL_HANDLED(164, settimeofday)

32
arch/x86_64/kernel/syscall.c
View File

@ -169,6 +169,38 @@ fault:
return -EFAULT;
}
SYSCALL_DECLARE(prctl)
{
struct process *proc = cpu_local_var(current)->proc;
int option = (int)ihk_mc_syscall_arg0(ctx);
unsigned long arg2 = (unsigned long)ihk_mc_syscall_arg1(ctx);
unsigned long arg3 = (unsigned long)ihk_mc_syscall_arg2(ctx);
unsigned long arg4 = (unsigned long)ihk_mc_syscall_arg3(ctx);
unsigned long arg5 = (unsigned long)ihk_mc_syscall_arg4(ctx);
int ret = 0;
switch (option) {
case PR_SET_THP_DISABLE:
if (arg3 || arg4 || arg5) {
return -EINVAL;
}
proc->thp_disable = arg2;
ret = 0;
break;
case PR_GET_THP_DISABLE:
if (arg2 || arg3 || arg4 || arg5) {
return -EINVAL;
}
ret = proc->thp_disable;
break;
default:
ret = syscall_generic_forwarding(__NR_prctl, ctx);
break;
}
return ret;
}
struct sigsp {
unsigned long flags;
void *link;