From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Josh Poimboeuf <jpoimboe@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>,
Jonathan Corbet <corbet@lwn.net>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
tony.luck@intel.com, ak@linux.intel.com,
tim.c.chen@linux.intel.com,
Nikolay Borisov <nik.borisov@suse.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
kvm@vger.kernel.org,
Alyssa Milburn <alyssa.milburn@linux.intel.com>,
Daniel Sneddon <daniel.sneddon@linux.intel.com>,
antonio.gomez.iglesias@linux.intel.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alyssa Milburn <alyssa.milburn@intel.com>
Subject: Re: [PATCH v4 1/6] x86/bugs: Add asm helpers for executing VERW
Date: Fri, 1 Dec 2023 19:39:05 +0000 [thread overview]
Message-ID: <c61402de-c61e-4d7f-a2b1-3eaa13e4ef33@citrix.com> (raw)
In-Reply-To: <20231201193657.mvzslo4nlcbuv2q4@treble>
On 01/12/2023 7:36 pm, Josh Poimboeuf wrote:
> On Fri, Oct 27, 2023 at 07:38:40AM -0700, Pawan Gupta wrote:
>> +.pushsection .entry.text, "ax"
>> +
>> +.align L1_CACHE_BYTES, 0xcc
>> +SYM_CODE_START_NOALIGN(mds_verw_sel)
>> + UNWIND_HINT_UNDEFINED
>> + ANNOTATE_NOENDBR
>> + .word __KERNEL_DS
>> +.align L1_CACHE_BYTES, 0xcc
>> +SYM_CODE_END(mds_verw_sel);
>> +/* For KVM */
>> +EXPORT_SYMBOL_GPL(mds_verw_sel);
>> +
>> +.popsection
> This is data, so why is it "CODE" in .entry.text?
Because KPTI.
~Andrew
next prev parent reply other threads:[~2023-12-01 19:39 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20231027-delay-verw-v4-0-9a3622d4bcf7@linux.intel.com>
[not found] ` <20231027-delay-verw-v4-1-9a3622d4bcf7@linux.intel.com>
[not found] ` <20231027153203.GJZTvX84mr+63lVWIH@fat_crate.local>
2023-11-02 0:01 ` [PATCH v4 1/6] x86/bugs: Add asm helpers for executing VERW Pawan Gupta
2023-12-01 19:36 ` Josh Poimboeuf
2023-12-01 19:39 ` Andrew Cooper [this message]
2023-12-01 20:04 ` Josh Poimboeuf
2023-12-20 1:15 ` Pawan Gupta
[not found] ` <20231027-delay-verw-v4-4-9a3622d4bcf7@linux.intel.com>
2023-12-01 19:59 ` [PATCH v4 4/6] x86/bugs: Use ALTERNATIVE() instead of mds_user_clear static key Josh Poimboeuf
2023-12-20 1:20 ` Pawan Gupta
[not found] ` <20231027-delay-verw-v4-6-9a3622d4bcf7@linux.intel.com>
2023-12-01 20:02 ` [PATCH v4 6/6] KVM: VMX: Move VERW closer to VMentry for MDS mitigation Josh Poimboeuf
2023-12-20 1:25 ` Pawan Gupta
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