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 09:49:40 +0200 [thread overview]
Message-ID: <YvydlP+XivIwfAPO@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <CAA9_cmfBubQe6EGk5+wjotvofZavfjFud-JMPW13Au0gpAcWog@mail.gmail.com>
On Tue, Aug 16, 2022 at 10:42:03AM -0700, Dan Williams wrote:
> I also think this cache_flush_region() API wants a prominent comment
> clarifying the limited applicability of this API. I.e. that it is not
> for general purpose usage, not for VMs, and only for select bare metal
> scenarios that instantaneously invalidate wide swaths of memory.
> Otherwise, I can now see how this looks like a potentially scary
> expansion of the usage of wbinvd.
This; because adding a generic API like this makes it ripe for usage.
And this is absolutely the very last thing we want used.
next prev parent reply other threads:[~2022-08-17 7:50 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-15 21:08 [PATCH RFC 00/15] Introduce security commands for CXL pmem device Dave Jiang
2022-07-15 21:08 ` [PATCH RFC 01/15] cxl/pmem: Introduce nvdimm_security_ops with ->get_flags() operation Dave Jiang
2022-07-15 21:09 ` Davidlohr Bueso
2022-08-03 16:29 ` Jonathan Cameron
2022-07-18 5:34 ` [PATCH RFC 1/15] " Davidlohr Bueso
2022-07-15 21:08 ` [PATCH RFC 02/15] tools/testing/cxl: Create context for cxl mock device Dave Jiang
2022-07-18 6:29 ` [PATCH RFC 2/15] " Davidlohr Bueso
2022-08-03 16:36 ` [PATCH RFC 02/15] " Jonathan Cameron
2022-08-09 20:30 ` Dave Jiang
2022-07-15 21:08 ` [PATCH RFC 03/15] tools/testing/cxl: Add "Get Security State" opcode support Dave Jiang
2022-08-03 16:51 ` Jonathan Cameron
2022-07-15 21:08 ` [PATCH RFC 04/15] cxl/pmem: Add "Set Passphrase" security command support Dave Jiang
2022-07-18 6:36 ` [PATCH RFC 4/15] " Davidlohr Bueso
2022-07-19 18:55 ` Dave Jiang
2022-08-03 17:01 ` [PATCH RFC 04/15] " Jonathan Cameron
2022-07-15 21:09 ` [PATCH RFC 05/15] tools/testing/cxl: Add "Set Passphrase" opcode support Dave Jiang
2022-08-03 17:15 ` Jonathan Cameron
2022-07-15 21:09 ` [PATCH RFC 06/15] cxl/pmem: Add Disable Passphrase security command support Dave Jiang
2022-08-03 17:21 ` Jonathan Cameron
2022-07-15 21:09 ` [PATCH RFC 07/15] tools/testing/cxl: Add "Disable" security opcode support Dave Jiang
2022-08-03 17:23 ` Jonathan Cameron
2022-07-15 21:09 ` [PATCH RFC 08/15] cxl/pmem: Add "Freeze Security State" security command support Dave Jiang
2022-08-03 17:23 ` Jonathan Cameron
2022-07-15 21:09 ` [PATCH RFC 09/15] tools/testing/cxl: Add "Freeze Security State" security opcode support Dave Jiang
2022-07-15 21:09 ` [PATCH RFC 10/15] x86: add an arch helper function to invalidate all cache for nvdimm Dave Jiang
2022-07-18 5:30 ` Davidlohr Bueso
2022-07-19 19:07 ` Dave Jiang
2022-08-03 17:37 ` 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
2022-08-17 7:49 ` Peter Zijlstra [this message]
2022-07-15 21:09 ` [PATCH RFC 11/15] cxl/pmem: Add "Unlock" security command support Dave Jiang
2022-08-04 13:19 ` Jonathan Cameron
2022-08-09 22:31 ` Dave Jiang
2022-07-15 21:09 ` [PATCH RFC 12/15] tools/testing/cxl: Add "Unlock" security opcode support Dave Jiang
2022-07-15 21:09 ` [PATCH RFC 13/15] cxl/pmem: Add "Passphrase Secure Erase" security command support Dave Jiang
2022-07-20 6:17 ` Davidlohr Bueso
2022-07-20 17:38 ` Dave Jiang
2022-07-20 18:02 ` Davidlohr Bueso
2022-07-15 21:09 ` [PATCH RFC 14/15] tools/testing/cxl: Add "passphrase secure erase" opcode support Dave Jiang
2022-07-15 21:10 ` [PATCH RFC 15/15] nvdimm/cxl/pmem: Add support for master passphrase disable security command Dave Jiang
2022-07-15 21:29 ` [PATCH RFC 00/15] Introduce security commands for CXL pmem device Davidlohr Bueso
2022-07-19 18:53 ` Dave Jiang
2022-08-03 17:03 ` Jonathan Cameron
2022-08-08 22:18 ` Dave Jiang
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