[SRU][v2][PATCH 0/2][j/gcp][k] sev-guest vulnerability fix + follow-up

[Khalid Elmously]

BugLink: https://bugs.launchpad.net/bugs/2013198

"virt/sev-guest: Prevent IV reuse in the SNP guest driver" is from upstream 5.19 and
it fixes a vulnerability in SEV-SNP but it also introduced its own problem which was
fixed in "virt/coco/sev-guest: Add throttling awareness" which was merged upstream in 6.3

Neither patch is present in the Jammmy (5.15) kernels - however, out of the 5.15 kernels they are only needed in j/gcp as this is the only 5.15 kernel that has SEV-SNP support.

The first patch ("virt/sev-guest: Prevent IV reuse in the SNP guest driver") is already present in the Kinetic (5.19) kernel - so only the follow-up fix is needed there

Lunar (6.2) kernels already contain both patches (the first is from 5.19, the second came from linux-stable)


Testing: Boot tested the patches in a SEV-SNP environment.


v2:
 - Include fixes for Kinetic (5.19) kernels
 - Update 'backport' section with more detail


Dionna Glaze (1):
  virt/coco/sev-guest: Add throttling awareness

Peter Gonda (1):
  virt/sev-guest: Prevent IV reuse in the SNP guest driver

 arch/x86/include/asm/sev-common.h     |  3 +-
 arch/x86/kernel/sev.c                 |  4 +-
 drivers/virt/coco/sevguest/sevguest.c | 95 ++++++++++++++++++++++-----
 3 files changed, 83 insertions(+), 19 deletions(-)

-- 
2.34.1