Displaying 2 results from an estimated 2 matches for "trapinfo_sizeof".
2012 Jul 26
2
[PATCH] x86-64: drop updating of UREGS_rip when converting sysenter to #GP
...nce(%rbx),%rdx
@@ -292,7 +290,6 @@ sysenter_eflags_saved:
UNLIKELY_START(z, sysenter_gpf)
movq VCPU_trap_ctxt(%rbx),%rsi
movl $TRAP_gp_fault,UREGS_entry_vector(%rsp)
- subq $2,UREGS_rip(%rsp)
movl %eax,TRAPBOUNCE_error_code(%rdx)
movq TRAP_gp_fault * TRAPINFO_sizeof + TRAPINFO_eip(%rsi),%rax
testb $4,TRAP_gp_fault * TRAPINFO_sizeof + TRAPINFO_flags(%rsi)
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2012 Oct 02
18
[PATCH 0/3] x86: adjust entry frame generation
This set of patches converts the way frames gets created from
using PUSHes/POPs to using MOVes, thus allowing (in certain
cases) to avoid saving/restoring part of the register set.
While the place where the (small) win from this comes from varies
between CPUs, the net effect is a 1 to 2% reduction on a
combined interruption entry and exit when the full state save
can be avoided.
1: use MOV