> -Original Message-
> From: Xen-devel [mailto:xen-devel-boun...@lists.xen.org] On Behalf Of Jan
> Beulich
> Sent: 30 March 2016 15:23
> To: Paul Durrant
> Cc: Andrew Cooper; Keir (Xen.org); xen-de...@lists.xenproject.org
> Subject: Re: [Xen-devel] [PATCH v3] x86/h
>>> On 30.03.16 at 15:18, wrote:
>> -Original Message-
>> From: Jan Beulich [mailto:jbeul...@suse.com]
>> Sent: 30 March 2016 14:15
>> To: Paul Durrant
>> Cc: Andrew Cooper; xen-de...@lists.xenproject.org; Keir (Xen.org)
>> Subject: Re: [PATCH v3] x86/hvm/viridian: zero and check vcpu con
> -Original Message-
> From: Jan Beulich [mailto:jbeul...@suse.com]
> Sent: 30 March 2016 14:15
> To: Paul Durrant
> Cc: Andrew Cooper; xen-de...@lists.xenproject.org; Keir (Xen.org)
> Subject: Re: [PATCH v3] x86/hvm/viridian: zero and check vcpu context
> __pad field
>
> >>> On 30.03.16 a
>>> On 30.03.16 at 13:34, wrote:
> --- a/xen/arch/x86/mm.c
> +++ b/xen/arch/x86/mm.c
> @@ -589,7 +589,8 @@ static inline void guest_get_eff_kern_l1e(struct vcpu *v,
> unsigned long addr,
> TOGGLE_MODE();
> }
>
> -static const char __section(".bss.page_aligned.const") zero_page[PAGE_SIZE];
Commit 57844631 "save APIC assist vector" added an extra field to the
viridian vcpu context save record. This field was only a uint8_t and
so an extra __pad field was also added to pad up to the next 64-bit
boundary.
This patch makes sure that __pad field is zeroed on save and checked
for zero on
