From: Marc Zyngier <maz@kernel.org>
To: Ard Biesheuvel <ardb+git@google.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Ryan Roberts <ryan.roberts@arm.com>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Kees Cook <keescook@chromium.org>,
Quentin Perret <qperret@google.com>
Subject: Re: [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling
Date: Thu, 19 Dec 2024 17:11:31 +0000 [thread overview]
Message-ID: <86y10bpph8.wl-maz@kernel.org> (raw)
In-Reply-To: <20241212081841.2168124-8-ardb+git@google.com>
On Thu, 12 Dec 2024 08:18:42 +0000,
Ard Biesheuvel <ardb+git@google.com> wrote:
>
> From: Ard Biesheuvel <ardb@kernel.org>
>
> This series addresses a number of buglets related to how we handle the
> size of the physical address space when building LPA2 capable kernels:
>
> - reject 52-bit physical addressess in the mapping routines when LPA2 is
> configured but not available at runtime
> - ensure that TCR.IPS is not set to 52-bits if LPA2 is not supported
> - ensure that TCR_EL2.PS and DS match the host, regardless of whether
> LPA2 is available at stage 2
> - don't rely on kvm_get_parange() and invalid physical addresses as
> control flags in the pKVM page donation APIs
>
> Finally, the configurable 48-bit physical address space limit is dropped
> entirely, as it doesn't buy us a lot now that all the PARange and {I}PS
> handling is done at runtime.
Acked-by: Marc Zyngier <maz@kernel.org>
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2024-12-19 17:11 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-12 8:18 [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling Ard Biesheuvel
2024-12-12 8:18 ` [PATCH v3 1/6] arm64/mm: Reduce PA space to 48 bits when LPA2 is not enabled Ard Biesheuvel
2024-12-12 8:18 ` [PATCH v3 2/6] arm64/mm: Override PARange for !LPA2 and use it consistently Ard Biesheuvel
2024-12-12 8:18 ` [PATCH v3 3/6] arm64/kvm: Configure HYP TCR.PS/DS based on host stage1 Ard Biesheuvel
2024-12-12 8:18 ` [PATCH v3 4/6] arm64/kvm: Avoid invalid physical addresses to signal owner updates Ard Biesheuvel
2024-12-12 11:33 ` Quentin Perret
2024-12-12 11:44 ` Ard Biesheuvel
2024-12-12 12:27 ` Quentin Perret
2024-12-12 8:18 ` [PATCH v3 5/6] arm64: Kconfig: force ARM64_PAN=y when enabling TTBR0 sw PAN Ard Biesheuvel
2024-12-12 8:18 ` [PATCH v3 6/6] arm64/mm: Drop configurable 48-bit physical address space limit Ard Biesheuvel
2024-12-20 23:39 ` Klara Modin
2024-12-20 23:41 ` Ard Biesheuvel
2024-12-21 0:29 ` Nathan Chancellor
2024-12-21 12:10 ` Will Deacon
2024-12-22 12:05 ` Nick Chan
2024-12-22 15:35 ` Ard Biesheuvel
2024-12-19 17:11 ` Marc Zyngier [this message]
2024-12-19 19:47 ` [PATCH v3 0/6] arm64: Clean up and simplify PA space size handling Will Deacon
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