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Microsoft Specific
Expands a 2-MB reverse map table (RMP) entry into a corresponding set of contiguous 4-KB RMP entries.
Syntax
unsigned int __psmash(
unsigned __int64 system_pa
);
Parameters
system_pa
[in] The system physical address of the 2-MB page.
Return value
Returns a status code that indicates the result of the operation.
| Value | Description |
|---|---|
0 |
The operation completed successfully. |
1 |
An input parameter is invalid. |
2 |
The current address space identifier (ASID) isn't zero. |
3 |
Another processor is modifying the same RMP entry. |
7 |
The page doesn't meet the requirements for expansion. |
Remarks
The __psmash intrinsic corresponds to the AMD PSMASH machine instruction. It's available only as an intrinsic and can be used only in kernel mode.
For more information, see AMD64 Architecture Programmer's Manual, Volume 2: System Programming.
Requirements
Available starting with MSVC 19.52.3683
| Intrinsic | Architecture | Header |
|---|---|---|
__psmash |
AMD x86/x64 with SEV-SNP support | <ammintrin.h> |
END Microsoft Specific
See also
Compiler intrinsics
__pvalidate
__rmpadjust
__rmpquery
__rmpread
__rmpupdate