Description: Spectre v1 SWAPGS, aka Grand Schemozzle
References:
 https://access.redhat.com/articles/4329821
Notes:
 bwh> Variant on Spectre v1, attacking conditional SWAPGS.
Bugs:
upstream: released (5.3-rc4) [18ec54fdd6d18d92025af097cd042a75cf0ea24c, a2059825986a1c8143fd6698774fa9d83733bb11, 64dbc122b20f75183d8822618c24f85144a5a94d, f36cf386e3fec258a341d446915862eded3e13d8, 4c92057661a3412f547ede95715641d7ee16ddac]
4.19-upstream-stable: released (4.19.65) [befb822c062b4c3d93380a58d5fd479395e8b267, 23e7a7b3a75f6dd24c161bf7d1399f251bf5c109, 931b6bfe8af1069fd1a494ef6ab14509ffeacdc3, b88241aef6f1654417bb281546da316ffab57807, 7634b9cd27e8f867dd3438d262c78d4b9262497f]
4.9-upstream-stable: released (4.9.189) [7092a21c757c35d1f924da06092dbed7c113f79a, e90ec5e2b679fd882a0f59eb1bf155d96b34b29c, 90d45f0856f3479a742ae29d5150c59116d3f34a, 6583ecced632cf7f92ff8313d9a6d168df291124, 2224e89446b6095988606ffee3c040e6a7a2c049]
3.16-upstream-stable: released (3.16.72) [79969c78fd8622fa7e7f925acd483eb01714efa4, bba3308d5fe2c8c4605db3ea868ba57ad990d27d, e191f5119eba311b3585492174825db763eeb3b9, 822ef687a0a8e92fab6c12e3c2b5e1a5f1a97d54]
sid: released (5.2.7-1)
4.19-buster-security: released (4.19.37-5+deb10u2) [bugfix/x86/x86-speculation-Prepare-entry-code-for-Spectre-v1-sw.patch, bugfix/x86/x86-speculation-Enable-Spectre-v1-swapgs-mitigations.patch, bugfix/x86/x86-entry-64-Use-JMP-instead-of-JMPQ.patch, bugfix/x86/x86-speculation-swapgs-Exclude-ATOMs-from-speculatio.patch, bugfix/all/Documentation-Add-swapgs-description-to-the-Spectre-.patch]
4.9-stretch-security: released (4.9.168-1+deb9u5) [bugfix/x86/x86-speculation-prepare-entry-code-for-spectre-v1-sw.patch, bugfix/x86/x86-speculation-enable-spectre-v1-swapgs-mitigations.patch, bugfix/x86/x86-entry-64-use-jmp-instead-of-jmpq.patch, bugfix/x86/x86-speculation-swapgs-exclude-atoms-from-speculatio.patch]
3.16-jessie-security: released (3.16.72-1)