From: Paolo Bonzini <pbonzini@redhat.com>
To: Juergen Gross <jgross@suse.com>,
kvm@vger.kernel.org, x86@kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org
Cc: maz@kernel.org, ehabkost@redhat.com,
Jonathan Corbet <corbet@lwn.net>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>
Subject: Re: [PATCH v2 2/6] x86/kvm: add boot parameter for adding vcpu-id bits
Date: Tue, 28 Sep 2021 18:41:28 +0200 [thread overview]
Message-ID: <452d73b2-2d39-e80d-021d-f24550eaea82@redhat.com> (raw)
In-Reply-To: <20210903130808.30142-3-jgross@suse.com>
On 03/09/21 15:08, Juergen Gross wrote:
> + if (vcpu_id_add_bits >= 0) {
> + n_bits += vcpu_id_add_bits;
> + } else {
> + n_bits++; /* One additional bit for core level. */
> + if (topology_max_die_per_package() > 1)
> + n_bits++; /* One additional bit for die level. */
This needs to be unconditional since it is always possible to emulate a
multiple-die-per-package topology for a guest, even if the host has just
one.
Paolo
> + }
> +
> + if (!n_bits)
next prev parent reply other threads:[~2021-09-28 16:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-03 13:08 [PATCH v2 0/6] x86/kvm: add boot parameters for max vcpu configs Juergen Gross
2021-09-03 13:08 ` [PATCH v2 2/6] x86/kvm: add boot parameter for adding vcpu-id bits Juergen Gross
2021-09-03 13:43 ` Vitaly Kuznetsov
2021-09-03 13:53 ` Juergen Gross
2021-09-03 19:48 ` Eduardo Habkost
2021-09-06 4:46 ` Juergen Gross
2021-09-28 16:41 ` Paolo Bonzini [this message]
2021-09-03 13:08 ` [PATCH v2 6/6] x86/kvm: add boot parameter for setting max number of vcpus per guest Juergen Gross
2021-09-06 0:45 ` Yao Yuan
2021-09-06 4:47 ` Juergen Gross
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