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From: "Jörg Rödel" <jroedel@suse.de>
To: Dave Hansen <dave.hansen@intel.com>
Cc: x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	hpa@zytor.com, Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Mike Rapoport <rppt@kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Brijesh Singh <brijesh.singh@amd.com>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 3/4] x86/mm: Flush global TLB when switching to trampoline page-table
Date: Fri, 1 Oct 2021 19:57:52 +0200	[thread overview]
Message-ID: <76A7441A-2A7B-4FBD-A17E-B370893B9CEA@suse.de> (raw)
In-Reply-To: <03994224-abba-4551-9f9d-1360af69c78e@intel.com>



> Am 01.10.2021 um 18:13 schrieb Dave Hansen <dave.hansen@intel.com>:
> 
> On 10/1/21 8:48 AM, Joerg Roedel wrote:
>> Move the switching code into a function so that it can be re-used and
>> add a global TLB flush. This makes sure that usage of memory which is
>> not mapped in the trampoline page-table is reliably caught.
> 
> This looks fine.  But, just to be clear, nothing in this series reuses
> the code, right?

Correct, but my SEV-ES kexec series will re-use it, as it also uses the trampoline_pgd and switches to real-mode to park the APs.

Regards,

Jörg

  reply	other threads:[~2021-10-01 17:57 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-01 15:48 [PATCH v3 0/4] x86/mm: Fix some issues with using trampoline_pgd Joerg Roedel
2021-10-01 15:48 ` [PATCH v3 1/4] x86/realmode: Add comment for Global bit usage in trampline_pgd Joerg Roedel
2021-10-01 15:48 ` [PATCH v3 2/4] x86/mm/64: Flush global TLB on boot and AP bringup Joerg Roedel
2021-10-26  9:55   ` Borislav Petkov
2021-10-26 12:58     ` Borislav Petkov
2021-12-02 12:50       ` Joerg Roedel
2021-12-02 18:19         ` Borislav Petkov
2021-12-02 21:17           ` Joerg Roedel
2021-10-01 15:48 ` [PATCH v3 3/4] x86/mm: Flush global TLB when switching to trampoline page-table Joerg Roedel
2021-10-01 16:13   ` Dave Hansen
2021-10-01 17:57     ` Jörg Rödel [this message]
2021-10-27  9:58   ` Borislav Petkov
2021-12-02 12:58     ` Joerg Roedel
2021-12-02 18:26       ` Borislav Petkov
2021-10-01 15:48 ` [PATCH v3 4/4] x86/64/mm: Map all kernel memory into trampoline_pgd Joerg Roedel

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