>>> On 19.05.15 at 18:59, wrote:
> On 18/05/15 13:46, Jan Beulich wrote:
>> +stub_va = XEN_VIRT_END - (cpu + 1) * PAGE_SIZE;
>> +if ( map_pages_to_xen(stub_va, page_to_mfn(pg), 1,
>> + PAGE_HYPERVISOR_RX | MAP_SMALL_PAGES) )
>> +{
>> +if ( !*mfn )
>> +
On 20/05/15 14:37, Jan Beulich wrote:
On 19.05.15 at 18:59, wrote:
>> On 18/05/15 13:46, Jan Beulich wrote:
>>> @@ -616,6 +653,24 @@ static void cpu_smpboot_free(unsigned in
>>> free_cpumask_var(per_cpu(cpu_sibling_mask, cpu));
>>> free_cpumask_var(per_cpu(cpu_core_mask, cpu));
>>>
>>> On 19.05.15 at 18:59, wrote:
> On 18/05/15 13:46, Jan Beulich wrote:
>> @@ -616,6 +653,24 @@ static void cpu_smpboot_free(unsigned in
>> free_cpumask_var(per_cpu(cpu_sibling_mask, cpu));
>> free_cpumask_var(per_cpu(cpu_core_mask, cpu));
>>
>> +if ( per_cpu(stubs.addr, cpu) )
>>
>>> On 19.05.15 at 18:59, wrote:
> On 18/05/15 13:46, Jan Beulich wrote:
>> +unsigned long alloc_stub_page(unsigned int cpu, unsigned long *mfn)
>> +{
>> +unsigned long stub_va;
>> +struct page_info *pg;
>> +
>> +if ( *mfn )
>> +pg = mfn_to_page(*mfn);
>> +else
>> +{
>>
On 18/05/15 13:46, Jan Beulich wrote:
> --- a/xen/arch/x86/smpboot.c
> +++ b/xen/arch/x86/smpboot.c
> @@ -25,6 +25,7 @@
> #include
> #include
> #include
> +#include
> #include
> #include
> #include
> @@ -603,6 +604,42 @@ static int do_boot_cpu(int apicid, int c
> return rc;
> }
>
On 19/05/15 07:41, Jan Beulich wrote:
On 18.05.15 at 20:39, wrote:
>> On 18/05/15 13:46, Jan Beulich wrote:
>>> This is needed as stacks are going to become non-executable. Use
>>> separate stub pages (shared among suitable CPUs on the same node)
>>> instead.
>>>
>>> Signed-off-by: Jan Beulic
>>> On 18.05.15 at 20:39, wrote:
> On 18/05/15 13:46, Jan Beulich wrote:
>> This is needed as stacks are going to become non-executable. Use
>> separate stub pages (shared among suitable CPUs on the same node)
>> instead.
>>
>> Signed-off-by: Jan Beulich
>
> Can you please include a description
On 18/05/15 13:46, Jan Beulich wrote:
> This is needed as stacks are going to become non-executable. Use
> separate stub pages (shared among suitable CPUs on the same node)
> instead.
>
> Signed-off-by: Jan Beulich
Can you please include a description of how you intend the stubs to
function, and
This is needed as stacks are going to become non-executable. Use
separate stub pages (shared among suitable CPUs on the same node)
instead.
Signed-off-by: Jan Beulich
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -1270,6 +1270,10 @@ void __init noreturn __start_xen(unsigne
init
