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x86/paravirt: Remove clobbers parameter from paravirt patch functions

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The clobbers parameter from paravirt_patch_default() et al isn't used
any longer. Remove it.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: xen-devel@lists.xenproject.org
Cc: virtualization@lists.linux-foundation.org
Cc: akataria@vmware.com
Cc: rusty@rustcorp.com.au
Cc: boris.ostrovsky@oracle.com
Cc: hpa@zytor.com
Link: https://lkml.kernel.org/r/20180828074026.820-7-jgross@suse.com
This commit is contained in:
Juergen Gross 2018-08-28 09:40:17 +02:00 committed by Thomas Gleixner
parent 7e43720289
commit abc745f85c
6 changed files with 16 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/x86/include/asm/paravirt_types.h
View File

@ -85,7 +85,7 @@ struct pv_init_ops {
* the number of bytes of code generated, as we nop pad the
* rest in generic code.
*/
unsigned (*patch)(u8 type, u16 clobber, void *insnbuf,
unsigned (*patch)(u8 type, void *insnbuf,
unsigned long addr, unsigned len);
} __no_randomize_layout;
@ -373,14 +373,13 @@ extern struct pv_lock_ops pv_lock_ops;
unsigned paravirt_patch_ident_32(void *insnbuf, unsigned len);
unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len);
unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
unsigned paravirt_patch_default(u8 type, void *insnbuf,
unsigned long addr, unsigned len);
unsigned paravirt_patch_insns(void *insnbuf, unsigned len,
const char *start, const char *end);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len);
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len);
int paravirt_disable_iospace(void);

2
arch/x86/kernel/alternative.c
View File

@ -594,7 +594,7 @@ void __init_or_module apply_paravirt(struct paravirt_patch_site *start,
BUG_ON(p->len > MAX_PATCH_LEN);
/* prep the buffer with the original instructions */
memcpy(insnbuf, p->instr, p->len);
used = pv_init_ops.patch(p->instrtype, p->clobbers, insnbuf,
used = pv_init_ops.patch(p->instrtype, insnbuf,
(unsigned long)p->instr, p->len);
BUG_ON(used > p->len);

14
arch/x86/kernel/paravirt.c
View File

@ -81,10 +81,8 @@ struct branch {
u32 delta;
} __attribute__((packed));
static unsigned paravirt_patch_call(void *insnbuf,
const void *target, u16 tgt_clobbers,
unsigned long addr, u16 site_clobbers,
unsigned len)
static unsigned paravirt_patch_call(void *insnbuf, const void *target,
unsigned long addr, unsigned len)
{
struct branch *b = insnbuf;
unsigned long delta = (unsigned long)target - (addr+5);
@ -149,7 +147,7 @@ static void *get_call_destination(u8 type)
return *((void **)&tmpl + type);
}
unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
unsigned paravirt_patch_default(u8 type, void *insnbuf,
unsigned long addr, unsigned len)
{
void *opfunc = get_call_destination(type);
@ -172,10 +170,8 @@ unsigned paravirt_patch_default(u8 type, u16 clobbers, void *insnbuf,
/* If operation requires a jmp, then jmp */
ret = paravirt_patch_jmp(insnbuf, opfunc, addr, len);
else
/* Otherwise call the function; assume target could
clobber any caller-save reg */
ret = paravirt_patch_call(insnbuf, opfunc, CLBR_ANY,
addr, clobbers, len);
/* Otherwise call the function. */
ret = paravirt_patch_call(insnbuf, opfunc, addr, len);
return ret;
}

5
arch/x86/kernel/paravirt_patch_32.c
View File

@ -30,8 +30,7 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
extern bool pv_is_native_spin_unlock(void);
extern bool pv_is_native_vcpu_is_preempted(void);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
{
const unsigned char *start, *end;
unsigned ret;
@ -70,7 +69,7 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
default:
patch_default: __maybe_unused
ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
ret = paravirt_patch_default(type, ibuf, addr, len);
break;
patch_site:

5
arch/x86/kernel/paravirt_patch_64.c
View File

@ -38,8 +38,7 @@ unsigned paravirt_patch_ident_64(void *insnbuf, unsigned len)
extern bool pv_is_native_spin_unlock(void);
extern bool pv_is_native_vcpu_is_preempted(void);
unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
unsigned long addr, unsigned len)
unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len)
{
const unsigned char *start, *end;
unsigned ret;
@ -80,7 +79,7 @@ unsigned native_patch(u8 type, u16 clobbers, void *ibuf,
default:
patch_default: __maybe_unused
ret = paravirt_patch_default(type, clobbers, ibuf, addr, len);
ret = paravirt_patch_default(type, ibuf, addr, len);
break;
patch_site:

6
arch/x86/kernel/vsmp_64.c
View File

@ -69,7 +69,7 @@ asmlinkage __visible void vsmp_irq_enable(void)
}
PV_CALLEE_SAVE_REGS_THUNK(vsmp_irq_enable);
static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
static unsigned __init vsmp_patch(u8 type, void *ibuf,
unsigned long addr, unsigned len)
{
switch (type) {
@ -77,9 +77,9 @@ static unsigned __init vsmp_patch(u8 type, u16 clobbers, void *ibuf,
case PARAVIRT_PATCH(pv_irq_ops.irq_disable):
case PARAVIRT_PATCH(pv_irq_ops.save_fl):
case PARAVIRT_PATCH(pv_irq_ops.restore_fl):
return paravirt_patch_default(type, clobbers, ibuf, addr, len);
return paravirt_patch_default(type, ibuf, addr, len);
default:
return native_patch(type, clobbers, ibuf, addr, len);
return native_patch(type, ibuf, addr, len);
}
}