From: Sean Christopherson <seanjc@google.com>
To: Mathias Krause <minipli@grsecurity.net>
Cc: stable@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Paolo Bonzini <pbonzini@redhat.com>,
linux-kernel@vger.kernel.org,
Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
Subject: Re: [PATCH 5.15] Revert "KVM: x86: enable TDP MMU by default"
Date: Thu, 24 Aug 2023 08:00:01 -0700 [thread overview]
Message-ID: <ZOdwccVcfl+CH6+k@google.com> (raw)
In-Reply-To: <7f9587ed-36af-4cfe-3699-45ceb63b15c6@grsecurity.net>
On Thu, Aug 24, 2023, Mathias Krause wrote:
> On 24.08.23 03:15, Sean Christopherson wrote:
> >> This reverts commit 71ba3f3189c78f756a659568fb473600fd78f207.
> >>
> >> Link: https://lore.kernel.org/all/ZDmEGM+CgYpvDLh6@google.com
> >> Link: https://lore.kernel.org/all/f023d927-52aa-7e08-2ee5-59a2fbc65953@gameservers.com
> >> Cc: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com>
> >> Cc: Mathias Krause <minipli@grsecurity.net>
> >> Signed-off-by: Sean Christopherson <seanjc@google.com>
> >> ---
> >> arch/x86/kvm/mmu/tdp_mmu.c | 2 +-
> >> 1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
> >> index 6c2bb60ccd88..7a64fb238044 100644
> >> --- a/arch/x86/kvm/mmu/tdp_mmu.c
> >> +++ b/arch/x86/kvm/mmu/tdp_mmu.c
> >> @@ -10,7 +10,7 @@
> >> #include <asm/cmpxchg.h>
> >> #include <trace/events/kvm.h>
> >>
> >> -static bool __read_mostly tdp_mmu_enabled = true;
> >> +static bool __read_mostly tdp_mmu_enabled = false;
> >> module_param_named(tdp_mmu, tdp_mmu_enabled, bool, 0644);
> >>
> >> /* Initializes the TDP MMU for the VM, if enabled. */
> >>
> >> base-commit: f6f7927ac664ba23447f8dd3c3dfe2f4ee39272f
> >> --
>
> Acked-by: Mathias Krause <minipli@grsecurity.net>
>
> I guess this means no hope for
> https://lore.kernel.org/stable/234e01b6-1b5c-d682-a078-3dd91a62abf4@grsecurity.net/
> :/
Ya, not going to happen, sorry :-(
next prev parent reply other threads:[~2023-08-24 15:00 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-24 1:05 [PATCH 5.15] Revert "KVM: x86: enable TDP MMU by default" Sean Christopherson
2023-08-24 1:15 ` Sean Christopherson
2023-08-24 6:20 ` Mathias Krause
2023-08-24 15:00 ` Sean Christopherson [this message]
2023-08-24 10:11 ` Jeremi Piotrowski
2023-08-26 16:40 ` Greg Kroah-Hartman
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