x86/xen: remove xen_have_vcpu_info_placement flag

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The flag xen_have_vcpu_info_placement was needed to support Xen
hypervisors older than version 3.4, which didn't support the
VCPUOP_register_vcpu_info hypercall. Today the Linux kernel requires
at least Xen 4.0 to be able to run, so xen_have_vcpu_info_placement
can be dropped (in theory the flag was used to ensure a working kernel
even in case of the VCPUOP_register_vcpu_info hypercall failing for
other reasons than the hypercall not being supported, but the only
cases covered by the flag would be parameter errors, which ought not
to be made anyway).

This allows to let some functions return void now, as they can never
fail.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20211028072748.29862-2-jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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This commit is contained in:

Juergen Gross 2021-10-28 09:27:47 +02:00 • committed by Boris Ostrovsky

parent 767216796c

commit 12ad6cfc09

5 changed files with 33 additions and 126 deletions

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97

arch/x86/xen/enlighten.c

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6

arch/x86/xen/enlighten_hvm.c

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28

arch/x86/xen/enlighten_pv.c

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24

arch/x86/xen/smp.c

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4

arch/x86/xen/xen-ops.h

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