Verifying compressed stream fused with copy or transform operations
Methods and apparatus relating to verifying a compressed stream fused with copy or transform operation(s) are described. In an embodiment, compression logic circuitry compresses input data and stores the compressed data in a temporary buffer. The compression logic circuitry determines a first checksum value corresponding to the compressed data stored in the temporary buffer. Decompression logic circuitry performs a decompress-verify operation and a copy operation. The decompress-verify operation decompresses the compressed data stored in the temporary buffer to determine a second checksum value corresponding to the decompressed data from the temporary buffer. The copy operation transfers the compressed data from the temporary buffer to a destination buffer in response to a match between the first checksum value and the second checksum value. Other embodiments are also disclosed and claimed.
1. An apparatus comprising:
compression logic circuitry to compress input data and to store the compressed data in a temporary buffer, wherein the compression logic circuitry is to determine a first checksum value corresponding to the compressed data stored in the temporary buffer; and
decompression logic circuitry to perform a decompress-verify operation and a copy operation,
wherein the decompress-verify operation is to decompress the compressed data stored in the temporary buffer to determine a second checksum value corresponding to the decompressed data from the temporary buffer, wherein the copy operation is to transfer the compressed data from the temporary buffer to a destination buffer in response to a match between the first checksum value and the second checksum value, wherein a page fault is to be triggered in response to an access to the compressed data stored in the destination buffer, wherein the page fault is to cause the decompression logic circuitry to decompress the compressed data stored in the destination buffer.
2. The apparatus of claim 1 , wherein the decompressed data from the decompression logic circuitry is to be suppressed as an output to the destination buffer.
3. The apparatus of claim 1 , wherein the first checksum value and the second checksum value comprise Cyclic Redundancy Code (CRC) values.
4. The apparatus of claim 1 , wherein compression/decompression accelerator logic circuitry comprises the compression logic circuitry and the decompression logic circuitry.
5. The apparatus of claim 4 , wherein a cipher block in a decompression pipeline of the compression/decompression accelerator logic circuitry is to be reused to encrypt the compressed data enroute to the destination buffer.
6. The apparatus of claim 1 , comprising logic circuitry to determine whether the decompress-verify operation is enabled.
7. The apparatus of claim 1 , further comprising a decompression descriptor to store information corresponding to one or more of: a bit to indicate whether the decompress-verify operation is enabled, a source address, a destination address, one or more decompression flags, a source transfer size, and a maximum destination size.
8. The apparatus of claim 1 , wherein a processor, having one or more processor cores, comprises the compression logic circuitry and the decompression logic circuitry.
9. The apparatus of claim 1 , wherein the compressed data stored in the destination buffer is to be committed.
10. An apparatus comprising:
decoder circuitry to decode an instruction, the instruction to include a field corresponding to a fused copy/transform operation enablement; and
execution circuitry to execute the decoded instruction in accordance with the field to cause:
compression logic circuitry to compress input data and to store the compressed data in a temporary buffer, wherein the compression logic circuitry is to determine a first checksum value corresponding to the compressed data stored in the temporary buffer; and
decompression logic circuitry to perform a decompress-verify operation and a copy operation,
wherein the decompress-verify operation is to decompress the compressed data stored in the temporary buffer to determine a second checksum value corresponding to the decompressed data from the temporary buffer, wherein the copy operation is to transfer the compressed data from the temporary buffer to a destination buffer in response to a match between the first checksum value and the second checksum value, wherein a page fault is to be triggered in response to an access to the compressed data stored in the destination buffer, wherein the page fault is to cause the decompression logic circuitry to decompress the compressed data stored in the destination buffer.
11. The apparatus of claim 10 , wherein execution of the instruction is to cause enqueuing of a request for a fused copy/transform operation.
12. The apparatus of claim 11 , wherein the request is to originate from a user space and bypass a kernel.
13. The apparatus of claim 10 , wherein the field is to comprise an address to a storage location that stores at least one bit indicative of the fused copy/transform operation enablement.
14. The apparatus of claim 10 , wherein the decompressed data from the decompression logic circuitry is to be suppressed as an output to the destination buffer.
15. The apparatus of claim 10 , wherein the first checksum value and the second checksum value comprise Cyclic Redundancy Code (CRC) values.
16. The apparatus of claim 10 , wherein a compression/decompression accelerator logic circuitry comprises the compression logic circuitry and the decompression logic circuitry.
17. The apparatus of claim 16 , wherein a cipher block in a decompression pipeline of the compression/decompression accelerator logic circuitry is to be reused to encrypt the compressed data enroute to the destination buffer.
18. One or more non-transitory computer-readable media comprising one or more instructions that when executed on a processor configure the processor to perform one or more operations to cause:
compression logic circuitry to compress input data and to store the compressed data in a temporary buffer, wherein the compression logic circuitry is to determine a first checksum value corresponding to the compressed data stored in the temporary buffer; and
decompression logic circuitry to perform a decompress-verify operation and a copy operation,
wherein the decompress-verify operation is to decompress the compressed data stored in the temporary buffer to determine a second checksum value corresponding to the decompressed data from the temporary buffer, wherein the copy operation is to transfer the compressed data from the temporary buffer to a destination buffer in response to a match between the first checksum value and the second checksum value, wherein a page fault is to be triggered in response to an access to the compressed data stored in the destination buffer, wherein the page fault is to cause the decompression logic circuitry to decompress the compressed data stored in the destination buffer.
19. The one or more non-transitory computer-readable media of claim 18 , further comprising one or more instructions that when executed on the at least one processor configure the at least one processor to perform one or more operations to cause the decompressed data from the decompression logic circuitry is to be suppressed as an output to the destination buffer.
20. The one or more non-transitory computer-readable media of claim 18 , wherein the first checksum value and the second checksum value comprise Cyclic Redundancy Code (CRC) values.
21. The one or more non-transitory computer-readable media of claim 18 , further comprising one or more instructions that when executed on the at least one processor configure the at least one processor to perform one or more operations to cause determination of whether the decompress-verify operation is enabled.
22. The one or more non-transitory computer-readable media of claim 18 , further comprising one or more instructions that when executed on the at least one processor configure the at least one processor to perform one or more operations to cause a decompression descriptor to store information corresponding to one or more of: a bit to indicate whether the decompress-verify operation is enabled, a source address, a destination address, one or more decompression flags, a source transfer size, and a maximum destination size.
23. The one or more non-transitory computer-readable media of claim 18 , further comprising one or more instructions that when executed on the at least one processor configure the at least one processor to perform one or more operations to cause commitment of the compressed data stored in the destination buffer.