[Xen-changelog] [xen master] xen/arm32: head: Correctly report the HW CPU ID

[patchbot@xxxxxxx]

commit d3dae2f5c75c2fb8dce65b2ce94b12669e7706ed
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Mon Apr 15 13:39:01 2019 +0100
Commit:     Julien Grall <julien.grall@xxxxxxx>
CommitDate: Thu Jun 6 18:44:33 2019 +0100

    xen/arm32: head: Correctly report the HW CPU ID
    
    There are no reason to consider the HW CPU ID will be 0 when the
    processor is part of a uniprocessor system. At best, this will result to
    conflicting output as the rest of Xen use the value directly read from
    MPIDR.
    
    So remove the zeroing and logic to check if the CPU is part of a
    uniprocessor system.
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Reviewed-by: Andrii Anisov <andrii_anisov@xxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/arm32/head.S | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/xen/arch/arm/arm32/head.S b/xen/arch/arm/arm32/head.S
index 454d24537c..db72438e1a 100644
--- a/xen/arch/arm/arm32/head.S
+++ b/xen/arch/arm/arm32/head.S
@@ -124,16 +124,8 @@ GLOBAL(init_secondary)
         mov   r12, #1                /* r12 := is_secondary_cpu */
 
 common_start:
-        mov   r7, #0                 /* r7 := CPU ID. Initialy zero until we
-                                      * find that multiprocessor extensions are
-                                      * present and the system is SMP */
         mrc   CP32(r1, MPIDR)
-        tst   r1, #MPIDR_SMP         /* Multiprocessor extension supported? */
-        beq   1f
-        tst   r1, #MPIDR_UP          /* Uniprocessor system? */
-        bne   1f
         bic   r7, r1, #(~MPIDR_HWID_MASK) /* Mask out flags to get CPU ID */
-1:
 
         /* Non-boot CPUs wait here until __cpu_up is ready for them */
         teq   r12, #0
--
generated by git-patchbot for /home/xen/git/xen.git#master

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