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| author | Sean Christopherson <seanjc@google.com> | 2021-04-21 19:21:20 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-04-26 05:27:11 -0400 |
| commit | d0fe7b6404408835ed60232cb3bf28324b2f95db (patch) | |
| tree | 76a387a04a883e10a4d6b65268cc38e1786d0b5a /arch/x86/kvm/x86.c | |
| parent | dbdd096a5a74b94f6b786a47baef2085859b0dce (diff) | |
| download | lwn-d0fe7b6404408835ed60232cb3bf28324b2f95db.tar.gz lwn-d0fe7b6404408835ed60232cb3bf28324b2f95db.zip | |
KVM: x86: Remove emulator's broken checks on CR0/CR3/CR4 loads
Remove the emulator's checks for illegal CR0, CR3, and CR4 values, as
the checks are redundant, outdated, and in the case of SEV's C-bit,
broken. The emulator manually calculates MAXPHYADDR from CPUID and
neglects to mask off the C-bit. For all other checks, kvm_set_cr*() are
a superset of the emulator checks, e.g. see CR4.LA57.
Fixes: a780a3ea6282 ("KVM: X86: Fix reserved bits check for MOV to CR3")
Cc: Babu Moger <babu.moger@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422022128.3464144-2-seanjc@google.com>
Cc: stable@vger.kernel.org
[Unify check_cr_read and check_cr_write. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
0 files changed, 0 insertions, 0 deletions