From: Borislav Petkov <bp@alien8.de>
To: Rik van Riel <riel@surriel.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org,
kernel-team@meta.com, dave.hansen@linux.intel.com,
luto@kernel.org, peterz@infradead.org, tglx@linutronix.de,
mingo@redhat.com, hpa@zytor.com, nadav.amit@gmail.com,
Rik van Riel <riel@fb.com>, Yu-cheng Yu <yu-cheng.yu@intel.com>
Subject: Re: [RFC v2 5/9] x86/mm: Change cpa_flush() to call flush_kernel_range() directly
Date: Wed, 21 May 2025 13:54:58 +0200 [thread overview]
Message-ID: <20250521115458.GDaC2_EqaXGa8ZsImM@fat_crate.local> (raw)
In-Reply-To: <20250520010350.1740223-6-riel@surriel.com>
On Mon, May 19, 2025 at 09:02:30PM -0400, Rik van Riel wrote:
> From: Rik van Riel <riel@fb.com>
>
> The function cpa_flush() calls __flush_tlb_one_kernel() and
> flush_tlb_all().
>
> Replacing that with a call to flush_tlb_kernel_range() allows
> cpa_flush() to make use of INVLPGB or RAR without any additional
> changes.
>
> Initialize invlpgb_count_max to 1, since flush_tlb_kernel_range()
> can now be called before invlpgb_count_max has been initialized
> to the value read from CPUID.
>
> [riel: remove now unused __cpa_flush_tlb]
>
> Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
> Signed-off-by: Rik van Riel <riel@surriel.com>
Please audit all your SOB chains.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2025-05-21 11:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-20 1:02 [RFC v2 PATCH 0/9] Intel RAR TLB invalidation Rik van Riel
2025-05-20 1:02 ` [RFC v2 1/9] x86/mm: Introduce MSR_IA32_CORE_CAPABILITIES Rik van Riel
2025-05-21 14:57 ` Dave Hansen
2025-05-22 15:10 ` Sean Christopherson
2025-05-20 1:02 ` [RFC v2 2/9] x86/mm: Introduce Remote Action Request MSRs Rik van Riel
2025-05-21 11:49 ` Borislav Petkov
2025-05-20 1:02 ` [RFC v2 3/9] x86/mm: enable BROADCAST_TLB_FLUSH on Intel, too Rik van Riel
2025-05-20 1:02 ` [RFC v2 4/9] x86/mm: Introduce X86_FEATURE_RAR Rik van Riel
2025-05-21 11:53 ` Borislav Petkov
2025-05-21 13:57 ` Rik van Riel
2025-05-21 14:53 ` Borislav Petkov
2025-05-21 16:06 ` Rik van Riel
2025-05-21 19:39 ` Borislav Petkov
2025-05-20 1:02 ` [RFC v2 5/9] x86/mm: Change cpa_flush() to call flush_kernel_range() directly Rik van Riel
2025-05-21 11:54 ` Borislav Petkov [this message]
2025-05-21 15:16 ` Dave Hansen
2025-05-20 1:02 ` [RFC v2 6/9] x86/apic: Introduce Remote Action Request Operations Rik van Riel
2025-05-20 9:16 ` Ingo Molnar
2025-06-04 0:11 ` Rik van Riel
2025-05-21 15:28 ` Dave Hansen
2025-05-21 15:59 ` Rik van Riel
2025-05-20 1:02 ` [RFC v2 7/9] x86/mm: Introduce Remote Action Request Rik van Riel
2025-05-20 9:28 ` Ingo Molnar
2025-05-20 12:57 ` Rik van Riel
2025-05-24 9:22 ` Ingo Molnar
2025-05-20 11:29 ` Nadav Amit
2025-05-20 13:00 ` Rik van Riel
2025-05-20 20:26 ` Nadav Amit
2025-05-20 20:31 ` Rik van Riel
2025-05-21 16:38 ` Dave Hansen
2025-05-21 19:06 ` Thomas Gleixner
2025-06-03 20:08 ` Rik van Riel
2025-05-20 1:02 ` [RFC v2 8/9] x86/mm: use RAR for kernel TLB flushes Rik van Riel
2025-05-20 1:02 ` [RFC v2 9/9] x86/mm: userspace & pageout flushing using Intel RAR Rik van Riel
2025-05-20 2:48 ` [RFC v2.1 " Rik van Riel
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