diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-21 22:05:26 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:08 +0200 |
| commit | 2f6474e4636bcc68af6c44abb2703f12d7f083da (patch) | |
| tree | 317a6b92fc169077e1eb9c3d7a10e3c62869109d /arch/x86/xen/setup.c | |
| parent | 1de16e0c17155d138282f3a9f65914a9a5da757e (diff) | |
x86/entry: Switch XEN/PV hypercall entry to IDTENTRY
Convert the XEN/PV hypercall to IDTENTRY:
- Emit the ASM stub with DECLARE_IDTENTRY
- Remove the ASM idtentry in 64-bit
- Remove the open coded ASM entry code in 32-bit
- Remove the old prototypes
The handler stubs need to stay in ASM code as they need 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.
[ mingo: Build fixes. ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Juergen Gross <jgross@suse.com>
Tested-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20200521202118.055270078@linutronix.de
Diffstat (limited to 'arch/x86/xen/setup.c')
| -rw-r--r-- | arch/x86/xen/setup.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 1a2d8a50dac4..3566e37241d7 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -20,6 +20,7 @@ #include <asm/setup.h> #include <asm/acpi.h> #include <asm/numa.h> +#include <asm/idtentry.h> #include <asm/xen/hypervisor.h> #include <asm/xen/hypercall.h> @@ -993,7 +994,8 @@ static void __init xen_pvmmu_arch_setup(void) HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_pae_extended_cr3); - if (register_callback(CALLBACKTYPE_event, xen_hypervisor_callback) || + if (register_callback(CALLBACKTYPE_event, + xen_asm_exc_xen_hypervisor_callback) || register_callback(CALLBACKTYPE_failsafe, xen_failsafe_callback)) BUG(); |