From: Paolo Bonzini <pbonzini@redhat.com>
To: Xiao Guangrong <guangrong.xiao@linux.intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: rkrcmar@redhat.com, bdas@redhat.com
Subject: Re: [PATCH v2 12/13] KVM: x86: add SMM to the MMU role, support SMRAM address space
Date: Thu, 18 Jun 2015 09:02:41 +0200 [thread overview]
Message-ID: <55826D11.2060801@redhat.com> (raw)
In-Reply-To: <558250D4.3050505@linux.intel.com>
On 18/06/2015 07:02, Xiao Guangrong wrote:
> However, role->level is more hotter than role->smm so that it's also a good
> candidate for this kind of trick.
Right, we could give the first 8 bits to role->level, so it can be
accessed with a single memory load and extracted with a single AND.
Those two are definitely the hottest fields.
> And this is only 32 bits which can be operated in a CPU register by a
> single memory load, that is why i was worried if it is really needed.
However, an 8-bit field can be loaded from memory with a single movz
instruction.
Paolo
next prev parent reply other threads:[~2015-06-18 7:02 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-27 17:05 [PATCH v2 00/13] SMM implementation for KVM Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 01/13] KVM: x86: introduce num_emulated_msrs Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 02/13] KVM: x86: pass host_initiated to functions that read MSRs Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 03/13] KVM: x86: pass the whole hflags field to emulator and back Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 04/13] KVM: x86: API changes for SMM support Paolo Bonzini
2015-05-28 9:00 ` Paolo Bonzini
2015-05-28 13:48 ` Radim Krčmář
2015-05-29 18:50 ` Radim Krčmář
2015-05-27 17:05 ` [PATCH v2 05/13] KVM: x86: stubs " Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 06/13] KVM: x86: save/load state on SMM switch Paolo Bonzini
2015-06-03 19:02 ` Radim Krčmář
2015-06-04 6:14 ` Paolo Bonzini
2015-06-04 11:34 ` Radim Krčmář
2015-06-04 13:59 ` Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 07/13] KVM: add vcpu-specific functions to read/write/translate GFNs Paolo Bonzini
2015-05-29 19:23 ` Radim Krčmář
2015-06-05 10:26 ` Paolo Bonzini
2015-06-05 12:10 ` Radim Krčmář
2015-06-05 12:43 ` Paolo Bonzini
2015-06-05 12:46 ` Paolo Bonzini
2015-06-05 15:13 ` Radim Krčmář
2015-06-05 15:27 ` Paolo Bonzini
2015-05-27 17:05 ` [PATCH v2 08/13] KVM: implement multiple address spaces Paolo Bonzini
2015-06-09 3:20 ` Xiao Guangrong
2015-05-27 17:05 ` [PATCH v2 09/13] KVM: x86: pass kvm_mmu_page to gfn_to_rmap Paolo Bonzini
2015-06-09 3:28 ` Xiao Guangrong
2015-06-17 8:15 ` Paolo Bonzini
2015-06-18 4:41 ` Xiao Guangrong
2015-05-27 17:05 ` [PATCH v2 10/13] KVM: x86: use vcpu-specific functions to read/write/translate GFNs Paolo Bonzini
2015-06-09 3:38 ` Xiao Guangrong
2015-05-27 17:05 ` [PATCH v2 11/13] KVM: x86: work on all available address spaces Paolo Bonzini
2015-06-09 3:45 ` Xiao Guangrong
2015-05-27 17:05 ` [PATCH v2 12/13] KVM: x86: add SMM to the MMU role, support SMRAM address space Paolo Bonzini
2015-06-09 4:01 ` Xiao Guangrong
2015-06-17 8:18 ` Paolo Bonzini
2015-06-18 5:02 ` Xiao Guangrong
2015-06-18 7:02 ` Paolo Bonzini [this message]
2015-05-27 17:05 ` [PATCH v2 13/13] KVM: x86: advertise KVM_CAP_X86_SMM Paolo Bonzini
2015-05-29 19:03 ` [PATCH v2 00/13] SMM implementation for KVM Radim Krčmář
2015-05-29 19:34 ` Paolo Bonzini
2015-06-04 8:56 ` [PATCH v2 14/13] KVM: x86: latch INITs while in system management mode Paolo Bonzini
2015-06-04 8:58 ` Paolo Bonzini
2015-06-04 12:26 ` [PATCH v2 00/13] SMM implementation for KVM Radim Krčmář
2015-06-04 13:49 ` Paolo Bonzini
2015-06-05 10:17 ` Avi Kivity
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