linux

iv/linux

History

Sean Christopherson e8f65b9bb4 KVM: x86: Remove defunct setting of XCR0 for guest during vCPU create

Drop code to initialize XCR0 during fx_init(), a.k.a. vCPU creation, as
XCR0 has been initialized during kvm_vcpu_reset() (for RESET) since
commit a554d207dc46 ("KVM: X86: Processor States following Reset or INIT").

Back when XCR0 support was added by commit 2acf923e38fb ("KVM: VMX:
Enable XSAVE/XRSTOR for guest"), KVM didn't differentiate between RESET
and INIT.  Ignoring the fact that calling fx_init() for INIT is obviously
wrong, e.g. FPU state after INIT is not the same as after RESET, setting
XCR0 in fx_init() was correct.

Eventually fx_init() got moved to kvm_arch_vcpu_init(), a.k.a. vCPU
creation (ignore the terrible name) by commit 0ee6a5172573 ("x86/fpu,
kvm: Simplify fx_init()").  Finally, commit 95a0d01eef7a ("KVM: x86: Move
all vcpu init code into kvm_arch_vcpu_create()") killed off
kvm_arch_vcpu_init(), leaving behind the oddity of redundant setting of
guest state during vCPU creation.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210921000303.400537-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2021-09-30 04:27:06 -04:00

alpha

alpha: enable GENERIC_PCI_IOMAP unconditionally

2021-09-19 10:37:00 -07:00

arc

Merge branch 'akpm' (patches from Andrew)

2021-09-08 12:55:35 -07:00

arm

entry: rseq: Call rseq_handle_notify_resume() in tracehook_notify_resume()

2021-09-22 10:24:01 -04:00

arm64

KVM/arm64 fixes for 5.15, take #1