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From: Paolo Bonzini <pbonzini@redhat.com>
To: Borislav Petkov <bp@suse.de>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, "Tom Lendacky" <thomas.lendacky@amd.com>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"H. Peter Anvin" <hpa@zytor.com>,
	"Radim Krčmář" <rkrcmar@redhat.com>
Subject: Re: [PATCH v6 5/5] x86/kvm: Avoid dynamic allocation of pvclock data when SEV is active
Date: Tue, 11 Sep 2018 11:26:21 +0200	[thread overview]
Message-ID: <3b8b4c9c-b0f6-1e08-3d26-0e146cd7189e@redhat.com> (raw)
In-Reply-To: <20180910164851.GC20286@zn.tnic>

On 10/09/2018 18:48, Borislav Petkov wrote:
> 
> so *maybe* - and I pretty much have no clue about virt - but just
> *maybe*, that kvmclock thing can be shared by all CPUs in a *guest*
> then. As in: the guest should see stable clocks which are the same
> regardless from which vCPU they're read and so on...

Usually the kvmclock structs are all the same, but there is support for
old machines with inconsistent TSCs (across different sockets typically).

Paolo

  reply	other threads:[~2018-09-11  9:26 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-07 17:57 [PATCH v6 0/5] x86: Fix SEV guest regression Brijesh Singh
2018-09-07 17:57 ` [PATCH v6 1/5] x86/mm: Restructure sme_encrypt_kernel() Brijesh Singh
2018-09-10 11:32   ` Borislav Petkov
2018-09-07 17:57 ` [PATCH v6 2/5] x86/mm: fix sme_populate_pgd() to update page flags Brijesh Singh
2018-09-10 11:36   ` Borislav Petkov
2018-09-10 12:28     ` Brijesh Singh
2018-09-10 12:32       ` Borislav Petkov
2018-09-07 17:57 ` [PATCH v6 3/5] x86/mm: add .data..decrypted section to hold shared variables Brijesh Singh
2018-09-10 11:54   ` Borislav Petkov
2018-09-10 12:33     ` Brijesh Singh
2018-09-07 17:57 ` [PATCH v6 4/5] x86/kvm: use __decrypted attribute in " Brijesh Singh
2018-09-10 12:04   ` Borislav Petkov
2018-09-10 13:15     ` Sean Christopherson
2018-09-10 13:29       ` Thomas Gleixner
2018-09-10 15:34       ` Borislav Petkov
2018-09-10 12:29   ` Paolo Bonzini
2018-09-10 12:33     ` Borislav Petkov
2018-09-10 12:46       ` Paolo Bonzini
2018-09-07 17:57 ` [PATCH v6 5/5] x86/kvm: Avoid dynamic allocation of pvclock data when SEV is active Brijesh Singh
2018-09-10 12:27   ` Borislav Petkov
2018-09-10 13:15     ` Brijesh Singh
2018-09-10 13:29       ` Sean Christopherson
2018-09-10 15:10         ` Brijesh Singh
2018-09-10 15:28           ` Sean Christopherson
2018-09-10 15:30             ` Brijesh Singh
2018-09-10 16:48               ` Borislav Petkov
2018-09-11  9:26                 ` Paolo Bonzini [this message]
2018-09-11 10:01                   ` Borislav Petkov
2018-09-11 10:19                     ` Paolo Bonzini
2018-09-11 10:25                       ` Borislav Petkov
2018-09-11 11:07                         ` Paolo Bonzini
2018-09-11 13:55                           ` Borislav Petkov
2018-09-11 14:00                             ` Paolo Bonzini
2018-09-10 15:53       ` Borislav Petkov
2018-09-10 16:13         ` Sean Christopherson
2018-09-10 16:14         ` Brijesh Singh
2018-09-10 12:28   ` Paolo Bonzini

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