On 22.05.20 20:32, Thomas Gleixner wrote:
Convert the XEN/PV hypercall to IDTENTRY:
- Emit the ASM stub with DECLARE_IDTENTRY
- Remove the ASM idtentry in 64bit
- Remove the open coded ASM entry code in 32bit
- Remove the old prototypes
The handler stubs need to stay in ASM code as it needs corner case handling
and adjustment of the stack pointer.
Provide a new C function which invokes the entry/exit handling and calls
into the XEN handler on the interrupt stack if required.
The exit code is slightly different from the regular idtentry_exit() on
non-preemptible kernels. If the hypercall is preemptible and need_resched()
is set then XEN provides a preempt hypercall scheduling function.
Move this functionality into the entry code so it can use the existing
idtentry functionality.
Signed-off-by: Thomas Gleixner <t...@linutronix.de>
Acked-by: Juergen Gross <jgr...@suse.com>
Tested-by: Juergen Gross <jgr...@suse.com>
Juergen
