From: Borislav Petkov <bp@alien8.de>
To: Juergen Gross <jgross@suse.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>,
linux-kernel@vger.kernel.org, x86@kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Andy Lutomirski <luto@kernel.org>,
Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH v5 13/16] x86: decouple PAT and MTRR handling
Date: Fri, 2 Dec 2022 14:55:08 +0100 [thread overview]
Message-ID: <Y4oDvBHt7VZwnoGd@zn.tnic> (raw)
In-Reply-To: <eded3906-0720-a300-50c7-f8dad61c32c0@suse.com>
On Fri, Dec 02, 2022 at 06:56:47AM +0100, Juergen Gross wrote:
> Instead of X86_FEATURE_XENPV we could introduce something like
> X86_FEATURE_PAT_READONLY, which could be set for Xen PV guests and for
> TDX guests.
Until a third type comes which wants its pony to be pink and to dance.
:-\
Nah, we already have X86_FEATURE_TDX_GUEST - let's use that in
pat_bp_init() and exit there early and be done with it. This way it is
also self-documenting who can and cannot deal with that code.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2022-12-02 13:55 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-02 7:46 [PATCH v5 00/16] x86: make PAT and MTRR independent from each other Juergen Gross
2022-11-02 7:46 ` [PATCH v5 01/16] x86/mtrr: add comment for set_mtrr_state() serialization Juergen Gross
2022-11-02 7:46 ` [PATCH v5 02/16] x86/mtrr: remove unused cyrix_set_all() function Juergen Gross
2022-11-02 7:47 ` [PATCH v5 03/16] x86/mtrr: replace use_intel() with a local flag Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Replace " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 04/16] x86/mtrr: rename prepare_set() and post_set() Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Rename " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 05/16] x86/mtrr: split MTRR specific handling from cache dis/enabling Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Split MTRR-specific " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 06/16] x86: move some code out of arch/x86/kernel/cpu/mtrr Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Move cache control code to cacheinfo.c tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 07/16] x86/mtrr: Disentangle MTRR init from PAT init Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 08/16] x86/mtrr: remove set_all callback from struct mtrr_ops Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Remove " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 09/16] x86/mtrr: simplify mtrr_bp_init() Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Simplify mtrr_bp_init() tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 10/16] x86/mtrr: get rid of __mtrr_enabled bool Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Get " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 11/16] x86/mtrr: let cache_aps_delayed_init replace mtrr_aps_delayed_init Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Let " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 12/16] x86/mtrr: add a stop_machine() handler calling only cache_cpu_init() Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Add " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 13/16] x86: decouple PAT and MTRR handling Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86: Decouple " tip-bot2 for Juergen Gross
2022-12-01 16:26 ` [PATCH v5 13/16] x86: decouple " Kirill A. Shutemov
2022-12-01 16:33 ` Juergen Gross
2022-12-01 23:57 ` Kirill A. Shutemov
2022-12-02 5:56 ` Juergen Gross
2022-12-02 13:27 ` Kirill A. Shutemov
2022-12-02 13:39 ` Juergen Gross
2022-12-02 14:33 ` Kirill A. Shutemov
2022-12-02 14:56 ` Juergen Gross
2022-12-05 7:40 ` Juergen Gross
2022-12-05 12:21 ` Kirill A. Shutemov
2022-12-02 13:55 ` Borislav Petkov [this message]
2022-11-02 7:47 ` [PATCH v5 14/16] x86: switch cache_ap_init() to hotplug callback Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/cacheinfo: Switch " tip-bot2 for Juergen Gross
2022-11-02 7:47 ` [PATCH v5 15/16] x86: do MTRR/PAT setup on all secondary CPUs in parallel Juergen Gross
2022-11-02 7:47 ` [PATCH v5 16/16] x86/mtrr: simplify mtrr_ops initialization Juergen Gross
2022-11-10 12:21 ` [tip: x86/cpu] x86/mtrr: Simplify " tip-bot2 for Juergen Gross
2022-11-02 18:04 ` [PATCH v5 00/16] x86: make PAT and MTRR independent from each other Borislav Petkov
2022-11-03 8:40 ` Juergen Gross
2022-11-03 16:15 ` Borislav Petkov
2022-11-07 19:25 ` Borislav Petkov
2022-11-08 7:30 ` Juergen Gross
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