From: Peter Zijlstra <peterz@infradead.org>
To: Dan Williams <dan.j.williams@intel.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>,
Mark Rutland <mark.rutland@arm.com>,
Dave Jiang <dave.jiang@intel.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
linux-cxl@vger.kernel.org, nvdimm@lists.linux.dev,
bwidawsk@kernel.org, ira.weiny@intel.com,
vishal.l.verma@intel.com, alison.schofield@intel.com,
a.manzanares@samsung.com, linux-arch@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
linux-arm-kernel@lists.infradead.org, bp@alien8.de,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arch/cacheflush: Introduce flush_all_caches()
Date: Wed, 17 Aug 2022 09:53:52 +0200 [thread overview]
Message-ID: <YvyekFhBWQ6qlAP6@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <62fbe6d7b75ae_f2f5129482@dwillia2-xfh.jf.intel.com.notmuch>
On Tue, Aug 16, 2022 at 11:49:59AM -0700, Dan Williams wrote:
> What would have helped is if the secure-erase and unlock definition in
> the specification mandated that the device emit cache invalidations for
> everything it has mapped when it is erased. However, that has some
> holes, and it also makes me think there is a gap in the current region
> provisioning code. If I have device-A mapped at physical-address-X and then
> tear that down and instantiate device-B at that same physical address
> there needs to be CPU cache invalidation between those 2 events.
Can we pretty please get those holes fixed ASAP such that future
generations can avoid the WBINVD nonsense?
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next prev parent reply other threads:[~2022-08-17 7:55 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <165791918718.2491387.4203738301057301285.stgit@djiang5-desk3.ch.intel.com>
[not found] ` <165791937063.2491387.15277418618265930924.stgit@djiang5-desk3.ch.intel.com>
[not found] ` <20220718053039.5whjdcxynukildlo@offworld>
[not found] ` <4bedc81d-62fa-7091-029e-a2e56b4f8f7a@intel.com>
2022-08-03 17:37 ` [PATCH RFC 10/15] x86: add an arch helper function to invalidate all cache for nvdimm Jonathan Cameron
2022-08-09 21:47 ` Dave Jiang
2022-08-10 14:15 ` Mark Rutland
2022-08-10 14:31 ` Eliot Moss
2022-08-10 18:09 ` Mark Rutland
2022-08-10 18:11 ` Eliot Moss
2022-08-10 20:06 ` Dan Williams
2022-08-10 21:13 ` Davidlohr Bueso
2022-08-10 21:30 ` Dan Williams
2022-08-10 21:31 ` Davidlohr Bueso
2022-08-15 16:07 ` [PATCH] arch/cacheflush: Introduce flush_all_caches() Davidlohr Bueso
2022-08-16 9:01 ` Peter Zijlstra
2022-08-16 16:50 ` Dan Williams
2022-08-16 16:53 ` Davidlohr Bueso
2022-08-16 17:42 ` Dan Williams
2022-08-16 17:52 ` Davidlohr Bueso
2022-08-16 18:49 ` Dan Williams
2022-08-17 7:53 ` Peter Zijlstra [this message]
2022-08-17 7:49 ` Peter Zijlstra
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