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| author | Sean Christopherson <seanjc@google.com> | 2021-02-04 17:24:58 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-04 11:37:48 +0100 |
| commit | 689ceaad9423c18cf503e9b8ba42d8d1dad8711a (patch) | |
| tree | 9a3d31c652b7ba4020791343f2ee84f704240490 /drivers/s390 | |
| parent | 6a402b937eb121a09b35e9a1a53d91343e33e4dd (diff) | |
| download | linux-stable-689ceaad9423c18cf503e9b8ba42d8d1dad8711a.tar.gz linux-stable-689ceaad9423c18cf503e9b8ba42d8d1dad8711a.tar.bz2 linux-stable-689ceaad9423c18cf503e9b8ba42d8d1dad8711a.zip | |
KVM: x86: Restore all 64 bits of DR6 and DR7 during RSM on x86-64
[ Upstream commit 2644312052d54e2e7543c7d186899a36ed22f0bf ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/s390')
0 files changed, 0 insertions, 0 deletions