Im trying to make sysret work in legacy mode, but i cant.
syscall is executing properly, but sysret is not.

and where from are flags loaded, i dont have r11 avaiable in legace mode?

syscall / sysret are valid only in long mode in its 64-bit submode (EFER.LMA must be 1, CS.L must be 1)
EFER.SCE bit must be set to 1
CPL must be 0 for the sysret

if you want to make transition in long mode from 64-bit ring0 to ring3 compatibility mode (32 bit subsystem, WOW), then use the sysret instruction (db 0Fh, 07h)
if you want to make transition in long mode from 64-bit ring0 to ring3 64-bit mode then use the sysretq instruction - it is with the REX.W prefix (db 48h, 0Fh, 07h)

not according to amd manual. star msr hold EIP for legacy mode.
and syscall is working under bochs

you are right - another incompatibility between AMD and Intel (my post was related to Intel manual)
Intel 253666.pdf says:
IF (CS.L=0 ) or (IA32_EFER.LMA = 0) or (IA32_EFER.SCE = 0)
(* Not in 64-Bit Mode or SYSCALL/SYSRET not enabled in IA32_EFER *)
THEN #UD; FI;

seems you don't need to worry about flags register, the only one modification of flags register when executing sysret at AMD in compatibility or legacy mode is forcing flags.IF=1 which is usually set to 1 when running in ring0 (interrupts are disabled only for as much short time as possible)

How do you play with the sysret instruction - do you have a win driver? Sysret must be executed at CPL=0 (syscall is executed at CPL=3) + driver task is also necessary to set some MSRs.