Fork of ipxe; additional commands and features https://git.openslx.org/openslx-ng/ipxe.git/atom/src/arch/x86/include/ipxe/rtc_entropy.h?h=openslx 2023-02-17T21:29:51+00:00 2023-02-17T21:29:51+00:00 Michael Brown 2023-02-17T16:56:11+00:00 urn:sha1:9f17d1116d27696ec76c48c5c77df34cba521380 As noted in commit 3c83843 ("[rng] Check for several functioning RTC interrupts"), experimentation shows that Hyper-V cannot be trusted to reliably generate RTC interrupts. (As noted in commit f3ba0fb ("[hyperv] Provide timer based on the 10MHz time reference count MSR"), Hyper-V appears to suffer from a general problem in reliably generating any legacy interrupts.) An alternative entropy source is therefore required for an image that may be used in a Hyper-V Gen1 virtual machine. The x86 RDRAND instruction provides a suitable alternative entropy source, but may not be supported by all CPUs. We must therefore allow for multiple entropy sources to be compiled in, with the single active entropy source selected only at runtime. Restructure the internal entropy API to allow a working entropy source to be detected and chosen at runtime. Enable the RDRAND entropy source for all x86 builds, since it is likely to be substantially faster than any other source. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2018-03-20T18:56:01+00:00 Michael Brown 2018-03-20T18:42:39+00:00 urn:sha1:0d35411f88dd37dda755d52b4549337f8299c698 We currently perform various min-entropy calculations using build-time floating-point arithmetic. No floating-point code ends up in the final binary, since the results are eventually converted to integers and asserted to be compile-time constants. Though this mechanism is undoubtedly cute, it inhibits us from using "-mno-sse" to prevent the use of SSE registers by the compiler. Fix by using fixed-point arithmetic instead. Signed-off-by: Michael Brown <mcb30@ipxe.org> 2016-02-16T19:32:32+00:00 Michael Brown 2016-02-16T15:19:01+00:00 urn:sha1:f468f12b1eca15e703aa2a79f1c82969c04c2322 Move most arch/i386 files to arch/x86, and adjust the contents of the Makefiles and the include/bits/*.h headers to reflect the new locations. This patch makes no substantive code changes, as can be seen using a rename-aware diff (e.g. "git show -M5"). This patch does not make the pcbios platform functional for x86_64; it merely allows it to compile without errors. Signed-off-by: Michael Brown <mcb30@ipxe.org>