Re: [Xen-devel] [PATCH v2 08/35] xen/arm64: head: Rework and document zero_bss()

2019-07-30 Thread Stefano Stabellini
On Mon, 22 Jul 2019, Julien Grall wrote: > On secondary CPUs, zero_bss() will be a NOP because BSS only need to be > zeroed once at boot. So the call in the secondary CPUs path can be > removed. It also means that x26 does not need to be set for secondary > CPU. > > Note that we will need to keep

[Xen-devel] [PATCH v2 08/35] xen/arm64: head: Rework and document zero_bss()

2019-07-22 Thread Julien Grall
On secondary CPUs, zero_bss() will be a NOP because BSS only need to be zeroed once at boot. So the call in the secondary CPUs path can be removed. It also means that x26 does not need to be set for secondary CPU. Note that we will need to keep x26 around for the boot CPU as BSS should not be rese