From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 27 Mar 2023 14:03:16 +0000 (-0400)
Subject: Merge tag 'kvmarm-fixes-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmar... 
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=8607daa2145f277c2548eee22e9fa45dfecd8dea;p=linux.git

Merge tag 'kvmarm-fixes-6.3-2' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.3, part #2

Fixes for a rather interesting set of bugs relating to the MMU:

 - Read the MMU notifier seq before dropping the mmap lock to guard
   against reading a potentially stale VMA

 - Disable interrupts when walking user page tables to protect against
   the page table being freed

 - Read the MTE permissions for the VMA within the mmap lock critical
   section, avoiding the use of a potentally stale VMA pointer

Additionally, some fixes targeting the vPMU:

 - Return the sum of the current perf event value and PMC snapshot for
   reads from userspace

 - Don't save the value of guest writes to PMCR_EL0.{C,P}, which could
   otherwise lead to userspace erroneously resetting the vPMU during VM
   save/restore
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8607daa2145f277c2548eee22e9fa45dfecd8dea