Messages in this thread | | | Subject | Re: [patch V9-1 13/39] x86/entry: Switch XEN/PV hypercall entry to IDTENTRY | From | Jürgen Groß <> | Date | Tue, 26 May 2020 09:44:11 +0200 |
| |
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 <tglx@linutronix.de>
Acked-by: Juergen Gross <jgross@suse.com> Tested-by: Juergen Gross <jgross@suse.com>
Juergen
| |