KVM: x86: Drop kvm_x86_ops.set_dr6() in favor of a new KVM_RUN flag

Browse source

Instruct vendor code to load the guest's DR6 into hardware via a new
KVM_RUN flag, and remove kvm_x86_ops.set_dr6(), whose sole purpose was to
load vcpu->arch.dr6 into hardware when DR6 can be read/written directly
by the guest.

Note, TDX already WARNs on any run_flag being set, i.e. will yell if KVM
thinks DR6 needs to be reloaded.  TDX vCPUs force KVM_DEBUGREG_AUTO_SWITCH
and never clear the flag, i.e. should never observe KVM_RUN_LOAD_GUEST_DR6.

Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20250610232010.162191-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

...

This commit is contained in:

Sean Christopherson 2025-06-10 16:20:05 -07:00

parent 2478b1b220

commit 80c64c7afe

6 changed files with 11 additions and 22 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/x86/include/asm/kvm-x86-ops.h

View file

2

arch/x86/include/asm/kvm_host.h

View file

10

arch/x86/kvm/svm/svm.c

View file

9

arch/x86/kvm/vmx/main.c

View file

9

arch/x86/kvm/vmx/vmx.c

View file

2

arch/x86/kvm/x86.c

View file