On 11/7/24 17:24, Dionna Glaze wrote:
> When no SEV or SEV-ES guests are active, then the firmware can be
> updated while (SEV-SNP) VM guests are active.
>
> CC: Sean Christopherson <seanjc@google.com>
> CC: Paolo Bonzini <pbonzini@redhat.com>
> CC: Thomas Gleixner <tglx@linutronix.de>
> CC: Ingo Molnar <mingo@redhat.com>
> CC: Borislav Petkov <bp@alien8.de>
> CC: Dave Hansen <dave.hansen@linux.intel.com>
> CC: Ashish Kalra <ashish.kalra@amd.com>
> CC: Tom Lendacky <thomas.lendacky@amd.com>
> CC: John Allen <john.allen@amd.com>
> CC: Herbert Xu <herbert@gondor.apana.org.au>
> CC: "David S. Miller" <davem@davemloft.net>
> CC: Michael Roth <michael.roth@amd.com>
> CC: Luis Chamberlain <mcgrof@kernel.org>
> CC: Russ Weight <russ.weight@linux.dev>
> CC: Danilo Krummrich <dakr@redhat.com>
> CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> CC: "Rafael J. Wysocki" <rafael@kernel.org>
> CC: Tianfei zhang <tianfei.zhang@intel.com>
> CC: Alexey Kardashevskiy <aik@amd.com>
>
> Co-developed-by: Ashish Kalra <ashish.kalra@amd.com>
> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
> Reviewed-by: Ashish Kalra <ashish.kalra@amd.com>
> Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
> ---
> arch/x86/kvm/svm/sev.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
> index d7cef84750b33..0d57a0a6b30fc 100644
> --- a/arch/x86/kvm/svm/sev.c
> +++ b/arch/x86/kvm/svm/sev.c
> @@ -444,7 +444,11 @@ static int __sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp,
> if (ret)
> goto e_no_asid;
>
> - init_args.probe = false;
> + /*
> + * Probe will skip SEV/SEV-ES platform initialization in order for
s/Probe/Setting probe/
s/in order/for an SEV-SNP guest in order/
> + * SNP firmware hotloading to be available when SEV-SNP VMs are running.
s/when/when only/
Thanks,
Tom
> + */
> + init_args.probe = vm_type != KVM_X86_SEV_VM && vm_type != KVM_X86_SEV_ES_VM;
> ret = sev_platform_init(&init_args);
> if (ret)
> goto e_free;