ARM just published an updated ARMv7 specification documenting the instruction CSDB (Consumption of Speculative Data Barrier). Supposedly supported since ARMv4 o.O pic.twitter.com/APkHIz8nhN — Igor Skochinsky (@IgorSkochinsky@infosec.exchange) (@IgorSkochinsky) April 9, 2018 Hmm, I can’t find the updated docs that Igor mentions above. https://developer.arm.com/support/security-update/latest-news/cache-speculation-issues-update http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0406c/index.html https://alastairreid.github.io/natural-specs/ https://alastairreid.github.io/ARM-v8a-xml-release/ https://alastairreid.github.io/dissecting-ARM-MRA/ https://alastairreid.github.io/arm-v8_3/ https://developer.arm.com/products/architecture/a-profile/exploration-tools