Contributors: 9
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Liu Yu |
135 |
46.71% |
2 |
15.38% |
| Stuart Yoder |
75 |
25.95% |
2 |
15.38% |
| Tudor Laurentiu |
39 |
13.49% |
1 |
7.69% |
| Scott Wood |
15 |
5.19% |
2 |
15.38% |
| Alexander Graf |
12 |
4.15% |
1 |
7.69% |
| Jordan Niethe |
6 |
2.08% |
1 |
7.69% |
| Rob Herring |
4 |
1.38% |
2 |
15.38% |
| Thomas Gleixner |
2 |
0.69% |
1 |
7.69% |
| Christophe Leroy |
1 |
0.35% |
1 |
7.69% |
| Total |
289 |
|
13 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* ePAPR para-virtualization support.
*
* Copyright (C) 2012 Freescale Semiconductor, Inc.
*/
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <asm/epapr_hcalls.h>
#include <asm/cacheflush.h>
#include <asm/code-patching.h>
#include <asm/machdep.h>
#include <asm/inst.h>
#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
extern void epapr_ev_idle(void);
extern u32 epapr_ev_idle_start[];
#endif
bool epapr_paravirt_enabled;
static bool __maybe_unused epapr_has_idle;
static int __init early_init_dt_scan_epapr(unsigned long node,
const char *uname,
int depth, void *data)
{
const u32 *insts;
int len;
int i;
insts = of_get_flat_dt_prop(node, "hcall-instructions", &len);
if (!insts)
return 0;
if (len % 4 || len > (4 * 4))
return -1;
for (i = 0; i < (len / 4); i++) {
ppc_inst_t inst = ppc_inst(be32_to_cpu(insts[i]));
patch_instruction(epapr_hypercall_start + i, inst);
#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
patch_instruction(epapr_ev_idle_start + i, inst);
#endif
}
#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
if (of_get_flat_dt_prop(node, "has-idle", NULL))
epapr_has_idle = true;
#endif
epapr_paravirt_enabled = true;
return 1;
}
int __init epapr_paravirt_early_init(void)
{
of_scan_flat_dt(early_init_dt_scan_epapr, NULL);
return 0;
}
static int __init epapr_idle_init(void)
{
#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
if (epapr_has_idle)
ppc_md.power_save = epapr_ev_idle;
#endif
return 0;
}
postcore_initcall(epapr_idle_init);