On 1/24/25 12:17, Maciej Wieczor-Retman wrote:
>> Could you poke around and see if there is any existing ABI that we can
>> use to query LA57 support? Maybe one of the things KVM exports, or some
>> TASK_SIZE_MAX comparisons?
> Sure, I'll try to find some other way.
>
> My previous tactic was to m
On 2025-01-24 at 21:17:22 +0100, Maciej Wieczor-Retman wrote:
>On 2025-01-24 at 08:14:41 -0800, Dave Hansen wrote:
>>On 11/27/24 09:35, Maciej Wieczor-Retman wrote:
>Sure, I'll try to find some other way.
>
>My previous tactic was to munmap() a high address and see if it works. Does
>that
>sound o
On 2025-01-24 at 08:14:41 -0800, Dave Hansen wrote:
>On 11/27/24 09:35, Maciej Wieczor-Retman wrote:
>> -/* Check 5-level page table feature in CPUID.(EAX=07H, ECX=00H):ECX.[bit
>> 16] */
>> static inline int cpu_has_la57(void)
>> {
>> -unsigned int cpuinfo[4];
>> -
>> -__cpuid_count(0x7
On 11/27/24 09:35, Maciej Wieczor-Retman wrote:
> -/* Check 5-level page table feature in CPUID.(EAX=07H, ECX=00H):ECX.[bit 16]
> */
> static inline int cpu_has_la57(void)
> {
> - unsigned int cpuinfo[4];
> -
> - __cpuid_count(0x7, 0, cpuinfo[0], cpuinfo[1], cpuinfo[2], cpuinfo[3]);
> -
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