From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/arch/mips/kernel/process.c | 48 +++++++++++++++++++++++++++++++++---------------
1 files changed, 33 insertions(+), 15 deletions(-)
diff --git a/kernel/arch/mips/kernel/process.c b/kernel/arch/mips/kernel/process.c
index 85522c1..98ecaf6 100644
--- a/kernel/arch/mips/kernel/process.c
+++ b/kernel/arch/mips/kernel/process.c
@@ -42,7 +42,6 @@
#include <asm/irq.h>
#include <asm/mips-cps.h>
#include <asm/msa.h>
-#include <asm/pgtable.h>
#include <asm/mipsregs.h>
#include <asm/processor.h>
#include <asm/reg.h>
@@ -53,6 +52,7 @@
#include <asm/inst.h>
#include <asm/stacktrace.h>
#include <asm/irq_regs.h>
+#include <asm/exec.h>
#ifdef CONFIG_HOTPLUG_CPU
void arch_cpu_idle_dead(void)
@@ -69,13 +69,15 @@
unsigned long status;
/* New thread loses kernel privileges. */
- status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_FR|KU_MASK);
+ status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|ST0_CU2|ST0_FR|KU_MASK);
status |= KU_USER;
regs->cp0_status = status;
lose_fpu(0);
clear_thread_flag(TIF_MSA_CTX_LIVE);
clear_used_math();
+#ifdef CONFIG_MIPS_FP_SUPPORT
atomic_set(¤t->thread.bd_emu_frame, BD_EMUFRAME_NONE);
+#endif
init_dsp();
regs->cp0_epc = pc;
regs->regs[29] = sp;
@@ -118,8 +120,9 @@
/*
* Copy architecture-specific thread state
*/
-int copy_thread_tls(unsigned long clone_flags, unsigned long usp,
- unsigned long kthread_arg, struct task_struct *p, unsigned long tls)
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+ unsigned long kthread_arg, struct task_struct *p,
+ unsigned long tls)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs, *regs = current_pt_regs();
@@ -131,8 +134,8 @@
childregs = (struct pt_regs *) childksp - 1;
/* Put the stack after the struct pt_regs. */
childksp = (unsigned long) childregs;
- p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
- if (unlikely(p->flags & PF_KTHREAD)) {
+ p->thread.cp0_status = (read_c0_status() & ~(ST0_CU2|ST0_CU1)) | ST0_KERNEL_CUMASK;
+ if (unlikely(p->flags & (PF_KTHREAD | PF_IO_WORKER))) {
/* kernel thread */
unsigned long status = p->thread.cp0_status;
memset(childregs, 0, sizeof(struct pt_regs));
@@ -176,7 +179,9 @@
clear_tsk_thread_flag(p, TIF_FPUBOUND);
#endif /* CONFIG_MIPS_MT_FPAFF */
+#ifdef CONFIG_MIPS_FP_SUPPORT
atomic_set(&p->thread.bd_emu_frame, BD_EMUFRAME_NONE);
+#endif
if (clone_flags & CLONE_SETTLS)
ti->tp_value = tls;
@@ -275,7 +280,21 @@
*poff = ip->i_format.simmediate / sizeof(ulong);
return 1;
}
-
+#ifdef CONFIG_CPU_LOONGSON64
+ if ((ip->loongson3_lswc2_format.opcode == swc2_op) &&
+ (ip->loongson3_lswc2_format.ls == 1) &&
+ (ip->loongson3_lswc2_format.fr == 0) &&
+ (ip->loongson3_lswc2_format.base == 29)) {
+ if (ip->loongson3_lswc2_format.rt == 31) {
+ *poff = ip->loongson3_lswc2_format.offset << 1;
+ return 1;
+ }
+ if (ip->loongson3_lswc2_format.rq == 31) {
+ *poff = (ip->loongson3_lswc2_format.offset << 1) + 1;
+ return 1;
+ }
+ }
+#endif
return 0;
#endif
}
@@ -650,8 +669,10 @@
{
unsigned long top = TASK_SIZE & PAGE_MASK;
- /* One page for branch delay slot "emulation" */
- top -= PAGE_SIZE;
+ if (IS_ENABLED(CONFIG_MIPS_FP_SUPPORT)) {
+ /* One page for branch delay slot "emulation" */
+ top -= PAGE_SIZE;
+ }
/* Space for the VDSO, data page & GIC user page */
top -= PAGE_ALIGN(current->thread.abi->vdso->size);
@@ -736,10 +757,9 @@
/*
* This is icky, but we use this to simply ensure that all CPUs have
* context switched, regardless of whether they were previously running
- * kernel or user code. This ensures that no CPU currently has its FPU
- * enabled, or is about to attempt to enable it through any path other
- * than enable_restore_fp_context() which will wait appropriately for
- * fp_mode_switching to be zero.
+ * kernel or user code. This ensures that no CPU that a mode-switching
+ * program may execute on keeps its FPU enabled (& in the old mode)
+ * throughout the mode switch.
*/
return 0;
}
@@ -827,8 +847,6 @@
for_each_cpu_and(cpu, &process_cpus, cpu_online_mask)
work_on_cpu(cpu, prepare_for_fp_mode_switch, NULL);
put_online_cpus();
-
- wake_up_var(&task->mm->context.fp_mode_switching);
return 0;
}
--
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