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From: David Woodhouse <dwmw2@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org, tglx@linutronix.de,
	karahmed@amazon.de, sironi@amazon.de, kvm@vger.kernel.org,
	torvalds@linux-foundation.org, pbonzini@redhat.com, bp@alien8.de,
	peterz@infradead.org, jmattson@google.com, rkrcmar@redhat.com,
	arjan.van.de.ven@intel.com, dave.hansen@intel.com
Subject: Re: [PATCH] x86/speculation: Clean up various Spectre related details
Date: Mon, 12 Feb 2018 15:30:13 +0000
Message-ID: <1518449413.6606.99.camel@infradead.org> (raw)
In-Reply-To: <20180211194305.zg7tq3x3cxjuphyo@gmail.com>


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On Sun, 2018-02-11 at 20:43 +0100, Ingo Molnar wrote:
> > And should these say 'Spectre v2' not just 'Spectre'?
> 
> Yeah, you are probably right, but I didn't want to make the messages too specific 
> - do we really know that this is the end of Spectre-style speculation holes?

Well... if a new problem is also remedied by use if IBRS/IBPB and
retpoline, I think we can happily call it a subclass of "Spectre v2".

And if it *isn't* addressed by those same things, then it's clearly
something different. Either way, these messages should be 'v2', no?

On the whole though, there are plenty of better things to be worrying
about :)

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  reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-10 23:39 [PATCH v2 0/6] Spectre v2 updates David Woodhouse
2018-02-10 23:39 ` [PATCH v2 1/6] x86/speculation: Update Speculation Control microcode blacklist David Woodhouse
2018-02-12  9:50   ` Darren Kenny
2018-02-12 14:16   ` David Woodhouse
2018-02-12 14:32     ` Thomas Gleixner
2018-02-10 23:39 ` [PATCH v2 2/6] Revert "x86/speculation: Simplify indirect_branch_prediction_barrier()" David Woodhouse
2018-02-10 23:39 ` [PATCH v2 3/6] KVM: x86: Reduce retpoline performance impact in slot_handle_level_range() David Woodhouse
2018-02-10 23:39 ` [PATCH v2 4/6] X86/nVMX: Properly set spec_ctrl and pred_cmd before merging MSRs David Woodhouse
2018-02-10 23:39 ` [PATCH v2 5/6] KVM/nVMX: Set the CPU_BASED_USE_MSR_BITMAPS if we have a valid L02 MSR bitmap David Woodhouse
2018-02-11 10:19   ` Ingo Molnar
     [not found]     ` <1518345844.3677.365.camel@amazon.co.uk>
2018-02-11 10:55       ` Ingo Molnar
2018-02-10 23:39 ` [PATCH v2 6/6] x86/speculation: Use IBRS if available before calling into firmware David Woodhouse
2018-02-11 11:46   ` Ingo Molnar
2018-02-11 10:41 ` [PATCH v2 0/6] Spectre v2 updates Ingo Molnar
     [not found] ` <1518362359-1005-1-git-send-email-dwmw@amazon.co.uk>
2018-02-11 18:50   ` [PATCH] x86/speculation: Clean up various Spectre related details Ingo Molnar
2018-02-11 19:25     ` David Woodhouse
2018-02-11 19:43       ` Ingo Molnar
2018-02-12 15:30         ` David Woodhouse [this message]
2018-02-13  8:04           ` Ingo Molnar
2018-02-12  8:27 ` [PATCH v2 0/6] Spectre v2 updates Paolo Bonzini
2018-02-13  7:59   ` Ingo Molnar

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