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authorSean Christopherson <seanjc@google.com>2021-02-04 17:24:58 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2021-02-09 08:17:05 -0500
commit2644312052d54e2e7543c7d186899a36ed22f0bf (patch)
tree6267b36d60289f36b696f5e88738a480a4ef4b8c /tools/perf/scripts/python/export-to-postgresql.py
parentKVM: x86: Remove misleading DR6/DR7 adjustments from RSM emulation (diff)
downloadlinux-dev-2644312052d54e2e7543c7d186899a36ed22f0bf.tar.xz
linux-dev-2644312052d54e2e7543c7d186899a36ed22f0bf.zip
KVM: x86: Restore all 64 bits of DR6 and DR7 during RSM on x86-64
Restore the full 64-bit values of DR6 and DR7 when emulating RSM on x86-64, as defined by both Intel's SDM and AMD's APM. Note, bits 63:32 of DR6 and DR7 are reserved, so this is a glorified nop unless the SMM handler is poking into SMRAM, which it most definitely shouldn't be doing since both Intel and AMD list the DR6 and DR7 fields as read-only. Fixes: 660a5d517aaa ("KVM: x86: save/load state on SMM switch") Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210205012458.3872687-3-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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