- Shorten CALL insns to pvops by a byte by using rip-relative addressing

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Merge tag 'x86_paravirt_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 paravirt improvement from Borislav Petkov:

 - Shorten CALL insns to pvops by a byte by using rip-relative
   addressing

* tag 'x86_paravirt_for_v5.18_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/paravirt: Use %rip-relative addressing in hook calls
This commit is contained in:
Linus Torvalds 2022-03-21 11:28:24 -07:00
commit 35cbdaf753

View File

@ -279,7 +279,7 @@ extern void (*paravirt_iret)(void);
#define paravirt_type(op) \
[paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \
[paravirt_opptr] "i" (&(pv_ops.op))
[paravirt_opptr] "m" (pv_ops.op)
#define paravirt_clobber(clobber) \
[paravirt_clobber] "i" (clobber)
@ -316,7 +316,7 @@ int paravirt_disable_iospace(void);
*/
#define PARAVIRT_CALL \
ANNOTATE_RETPOLINE_SAFE \
"call *%c[paravirt_opptr];"
"call *%[paravirt_opptr];"
/*
* These macros are intended to wrap calls through one of the paravirt