diff options
| author |   Paolo Bonzini <pbonzini@redhat.com> | 2022-10-28 17:30:07 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 12:16:46 -0500 |
| commit | f7ef280132f9bf6f82acf5aa5c3c837206eef501 (patch) | |
| tree | 661b83bdff9781276aa6b07eee33780e8653bd41 /net | |
| parent | KVM: SVM: replace regs argument of __svm_vcpu_run() with vcpu_svm (diff) | |
| download | linux-dev-f7ef280132f9bf6f82acf5aa5c3c837206eef501.tar.xz linux-dev-f7ef280132f9bf6f82acf5aa5c3c837206eef501.zip | |
KVM: SVM: adjust register allocation for __svm_vcpu_run()
32-bit ABI uses RAX/RCX/RDX as its argument registers, so they are in
the way of instructions that hardcode their operands such as RDMSR/WRMSR
or VMLOAD/VMRUN/VMSAVE.
In preparation for moving vmload/vmsave to __svm_vcpu_run(), keep
the pointer to the struct vcpu_svm in %rdi. In particular, it is now
possible to load svm->vmcb01.pa in %rax without clobbering the struct
vcpu_svm pointer.
No functional change intended.
Cc: stable@vger.kernel.org
Fixes: a149180fbcf3 ("x86: Add magic AMD return-thunk")
Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'net')
0 files changed, 0 insertions, 0 deletions