Merge tag 'x86_sev_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 SEV updates from Borislav Petkov:

 - A segmented Reverse Map table (RMP) is a across-nodes distributed
   table of sorts which contains per-node descriptors of each node-local
   4K page, denoting its ownership (hypervisor, guest, etc) in the realm
   of confidential computing. Add support for such a table in order to
   improve referential locality when accessing or modifying RMP table
   entries

 - Add support for reading the TSC in SNP guests by removing any
   interference or influence the hypervisor might have, with the goal of
   making a confidential guest even more independent from the hypervisor

* tag 'x86_sev_for_v6.14_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sev: Add the Secure TSC feature for SNP guests
  x86/tsc: Init the TSC for Secure TSC guests
  x86/sev: Mark the TSC in a secure TSC guest as reliable
  x86/sev: Prevent RDTSC/RDTSCP interception for Secure TSC enabled guests
  x86/sev: Prevent GUEST_TSC_FREQ MSR interception for Secure TSC enabled guests
  x86/sev: Change TSC MSR behavior for Secure TSC enabled guests
  x86/sev: Add Secure TSC support for SNP guests
  x86/sev: Relocate SNP guest messaging routines to common code
  x86/sev: Carve out and export SNP guest messaging init routines
  virt: sev-guest: Replace GFP_KERNEL_ACCOUNT with GFP_KERNEL
  virt: sev-guest: Remove is_vmpck_empty() helper
  x86/sev/docs: Document the SNP Reverse Map Table (RMP)
  x86/sev: Add full support for a segmented RMP table
  x86/sev: Treat the contiguous RMP table as a single RMP segment
  x86/sev: Map only the RMP table entries instead of the full RMP range
  x86/sev: Move the SNP probe routine out of the way
  x86/sev: Require the RMPREAD instruction after Zen4
  x86/sev: Add support for the RMPREAD instruction
  x86/sev: Prepare for using the RMPREAD instruction to access the RMP

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