From: Quentin Perret <qperret@google.com>
To: Rob Herring <robh+dt@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Frank Rowand <frowand.list@gmail.com>,
"moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)"
<linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)"
<kvmarm@lists.cs.columbia.edu>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE"
<devicetree@vger.kernel.org>,
Android Kernel Team <kernel-team@android.com>,
android-kvm@google.com
Subject: Re: [RFC PATCH 15/27] of/fdt: Introduce early_init_dt_add_memory_hyp()
Date: Wed, 18 Nov 2020 09:25:47 +0000 [thread overview]
Message-ID: <20201118092547.GA2031536@google.com> (raw)
In-Reply-To: <CAL_Jsq+xAy9+HjH6vqfmaAEKBe9MMm+wWvUtiz5dFnHmMneqNw@mail.gmail.com>
Hi Rob,
On Tuesday 17 Nov 2020 at 13:44:53 (-0600), Rob Herring wrote:
> Can this be done right after we add all the memblocks using the
> memblock API?
Possibly, but the thing I'm a bit worried about is the way 'no-map'
regions are removed from memblocks early on.
The EL2 object needs to know about these parts of memory too (and in
fact we may be able to enforce the 'no-map' attribute at the host stage
2 level as well). It's also possible we'll need to have portions of the
guests payload preloaded (and verified) by the bootloader into reserved
memory regions, possibly no-map, to make sure the host does not mess
with them in a normal use-case. So, I couldn't find a much better place
than this one but suggestions are very much welcome.
I'll have a go at the memblock stuff to see if I find a way to make it
work from that angle.
> I thought EFI would also need to be handled, but looks
> like it just calls early_init_dt_add_memory_arch(). That's odd
> especially for ACPI systems...
>
> I don't really like putting what looks like an arm64 only hook here,
> but then I don't want an arm64 version of
> early_init_dt_add_memory_arch() either. We're almost to the point of
> getting rid of the arch specific ones. But I don't have a better
> suggestion currently.
Ack, the ugly truth is that this is likely to remain arm64-specific. I
figured this was simple enough that we might want to consider it,
though.
Thanks,
Quentin
WARNING: multiple messages have this Message-ID (diff)
From: Quentin Perret <qperret@google.com>
To: Rob Herring <robh+dt@kernel.org>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE"
<devicetree@vger.kernel.org>,
Android Kernel Team <kernel-team@android.com>,
Frank Rowand <frowand.list@gmail.com>,
android-kvm@google.com, Catalin Marinas <catalin.marinas@arm.com>,
open list <linux-kernel@vger.kernel.org>,
"moderated list:ARM64 PORT \(AARCH64 ARCHITECTURE\)"
<linux-arm-kernel@lists.infradead.org>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR ARM64 \(KVM/arm64\)"
<kvmarm@lists.cs.columbia.edu>
Subject: Re: [RFC PATCH 15/27] of/fdt: Introduce early_init_dt_add_memory_hyp()
Date: Wed, 18 Nov 2020 09:25:47 +0000 [thread overview]
Message-ID: <20201118092547.GA2031536@google.com> (raw)
In-Reply-To: <CAL_Jsq+xAy9+HjH6vqfmaAEKBe9MMm+wWvUtiz5dFnHmMneqNw@mail.gmail.com>
Hi Rob,
On Tuesday 17 Nov 2020 at 13:44:53 (-0600), Rob Herring wrote:
> Can this be done right after we add all the memblocks using the
> memblock API?
Possibly, but the thing I'm a bit worried about is the way 'no-map'
regions are removed from memblocks early on.
The EL2 object needs to know about these parts of memory too (and in
fact we may be able to enforce the 'no-map' attribute at the host stage
2 level as well). It's also possible we'll need to have portions of the
guests payload preloaded (and verified) by the bootloader into reserved
memory regions, possibly no-map, to make sure the host does not mess
with them in a normal use-case. So, I couldn't find a much better place
than this one but suggestions are very much welcome.
I'll have a go at the memblock stuff to see if I find a way to make it
work from that angle.
> I thought EFI would also need to be handled, but looks
> like it just calls early_init_dt_add_memory_arch(). That's odd
> especially for ACPI systems...
>
> I don't really like putting what looks like an arm64 only hook here,
> but then I don't want an arm64 version of
> early_init_dt_add_memory_arch() either. We're almost to the point of
> getting rid of the arch specific ones. But I don't have a better
> suggestion currently.
Ack, the ugly truth is that this is likely to remain arm64-specific. I
figured this was simple enough that we might want to consider it,
though.
Thanks,
Quentin
_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
WARNING: multiple messages have this Message-ID (diff)
From: Quentin Perret <qperret@google.com>
To: Rob Herring <robh+dt@kernel.org>
Cc: "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE"
<devicetree@vger.kernel.org>,
Android Kernel Team <kernel-team@android.com>,
Frank Rowand <frowand.list@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
android-kvm@google.com, Catalin Marinas <catalin.marinas@arm.com>,
open list <linux-kernel@vger.kernel.org>,
James Morse <james.morse@arm.com>,
"moderated list:ARM64 PORT \(AARCH64 ARCHITECTURE\)"
<linux-arm-kernel@lists.infradead.org>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
"open list:KERNEL VIRTUAL MACHINE FOR ARM64 \(KVM/arm64\)"
<kvmarm@lists.cs.columbia.edu>,
Julien Thierry <julien.thierry.kdev@gmail.com>
Subject: Re: [RFC PATCH 15/27] of/fdt: Introduce early_init_dt_add_memory_hyp()
Date: Wed, 18 Nov 2020 09:25:47 +0000 [thread overview]
Message-ID: <20201118092547.GA2031536@google.com> (raw)
In-Reply-To: <CAL_Jsq+xAy9+HjH6vqfmaAEKBe9MMm+wWvUtiz5dFnHmMneqNw@mail.gmail.com>
Hi Rob,
On Tuesday 17 Nov 2020 at 13:44:53 (-0600), Rob Herring wrote:
> Can this be done right after we add all the memblocks using the
> memblock API?
Possibly, but the thing I'm a bit worried about is the way 'no-map'
regions are removed from memblocks early on.
The EL2 object needs to know about these parts of memory too (and in
fact we may be able to enforce the 'no-map' attribute at the host stage
2 level as well). It's also possible we'll need to have portions of the
guests payload preloaded (and verified) by the bootloader into reserved
memory regions, possibly no-map, to make sure the host does not mess
with them in a normal use-case. So, I couldn't find a much better place
than this one but suggestions are very much welcome.
I'll have a go at the memblock stuff to see if I find a way to make it
work from that angle.
> I thought EFI would also need to be handled, but looks
> like it just calls early_init_dt_add_memory_arch(). That's odd
> especially for ACPI systems...
>
> I don't really like putting what looks like an arm64 only hook here,
> but then I don't want an arm64 version of
> early_init_dt_add_memory_arch() either. We're almost to the point of
> getting rid of the arch specific ones. But I don't have a better
> suggestion currently.
Ack, the ugly truth is that this is likely to remain arm64-specific. I
figured this was simple enough that we might want to consider it,
though.
Thanks,
Quentin
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-11-18 9:25 UTC|newest]
Thread overview: 162+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-17 18:15 [RFC PATCH 00/27] KVM/arm64: A stage 2 for the host Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 01/27] arm64: lib: Annotate {clear,copy}_page() as position-independent Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 01/27] arm64: lib: Annotate {clear, copy}_page() " Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 02/27] KVM: arm64: Link position-independent string routines into .hyp.text Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-23 12:34 ` David Brazdil
2020-11-23 12:34 ` David Brazdil
2020-11-23 12:34 ` David Brazdil
2020-11-23 14:06 ` Quentin Perret
2020-11-23 14:06 ` Quentin Perret
2020-11-23 14:06 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 03/27] KVM: arm64: Add standalone ticket spinlock implementation for use at hyp Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 04/27] KVM: arm64: Initialize kvm_nvhe_init_params early Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 05/27] KVM: arm64: Avoid free_page() in page-table allocator Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 06/27] KVM: arm64: Factor memory allocation out of pgtable.c Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 07/27] KVM: arm64: Introduce a BSS section for use at Hyp Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 08/27] KVM: arm64: Make kvm_call_hyp() a function call " Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-23 12:51 ` David Brazdil
2020-11-23 12:51 ` David Brazdil
2020-11-23 12:51 ` David Brazdil
2020-11-17 18:15 ` [RFC PATCH 09/27] KVM: arm64: Allow using kvm_nvhe_sym() in hyp code Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-23 12:57 ` David Brazdil
2020-11-23 12:57 ` David Brazdil
2020-11-23 12:57 ` David Brazdil
2020-11-23 14:02 ` Quentin Perret
2020-11-23 14:02 ` Quentin Perret
2020-11-23 14:02 ` Quentin Perret
2020-11-23 14:54 ` David Brazdil
2020-11-23 14:54 ` David Brazdil
2020-11-23 14:54 ` David Brazdil
2020-11-17 18:15 ` [RFC PATCH 10/27] KVM: arm64: Introduce an early Hyp page allocator Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 11/27] KVM: arm64: Stub CONFIG_DEBUG_LIST at Hyp Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 12/27] KVM: arm64: Introduce a Hyp buddy page allocator Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 13/27] KVM: arm64: Enable access to sanitized CPU features at EL2 Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-23 10:55 ` Fuad Tabba
2020-11-23 10:55 ` Fuad Tabba
2020-11-23 10:55 ` Fuad Tabba
2020-11-23 13:51 ` Quentin Perret
2020-11-23 13:51 ` Quentin Perret
2020-11-23 13:51 ` Quentin Perret
2020-11-23 13:22 ` David Brazdil
2020-11-23 13:22 ` David Brazdil
2020-11-23 13:22 ` David Brazdil
2020-11-23 14:39 ` Quentin Perret
2020-11-23 14:39 ` Quentin Perret
2020-11-23 14:39 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 14/27] KVM: arm64: Factor out vector address calculation Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 15/27] of/fdt: Introduce early_init_dt_add_memory_hyp() Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 19:44 ` Rob Herring
2020-11-17 19:44 ` Rob Herring
2020-11-17 19:44 ` Rob Herring
2020-11-18 9:25 ` Quentin Perret [this message]
2020-11-18 9:25 ` Quentin Perret
2020-11-18 9:25 ` Quentin Perret
2020-11-18 14:31 ` Quentin Perret
2020-11-18 14:31 ` Quentin Perret
2020-11-18 14:31 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 16/27] KVM: arm64: Prepare Hyp memory protection Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-12-03 12:57 ` Fuad Tabba
2020-12-03 12:57 ` Fuad Tabba
2020-12-03 12:57 ` Fuad Tabba
2020-12-04 18:01 ` Quentin Perret
2020-12-04 18:01 ` Quentin Perret
2020-12-04 18:01 ` Quentin Perret
2020-12-07 10:20 ` Will Deacon
2020-12-07 10:20 ` Will Deacon
2020-12-07 10:20 ` Will Deacon
2020-12-07 11:05 ` Mark Rutland
2020-12-07 11:05 ` Mark Rutland
2020-12-07 11:05 ` Mark Rutland
2020-12-07 11:10 ` Will Deacon
2020-12-07 11:10 ` Will Deacon
2020-12-07 11:10 ` Will Deacon
2020-12-07 11:14 ` Fuad Tabba
2020-12-07 11:14 ` Fuad Tabba
2020-12-07 11:14 ` Fuad Tabba
2020-12-07 11:16 ` Fuad Tabba
2020-12-07 11:16 ` Fuad Tabba
2020-12-07 11:16 ` Fuad Tabba
2020-12-07 11:58 ` Quentin Perret
2020-12-07 11:58 ` Quentin Perret
2020-12-07 11:58 ` Quentin Perret
2020-12-07 13:54 ` Marc Zyngier
2020-12-07 13:54 ` Marc Zyngier
2020-12-07 13:54 ` Marc Zyngier
2020-12-07 14:17 ` Quentin Perret
2020-12-07 14:17 ` Quentin Perret
2020-12-07 14:17 ` Quentin Perret
2020-12-07 13:40 ` Will Deacon
2020-12-07 13:40 ` Will Deacon
2020-12-07 13:40 ` Will Deacon
2020-12-07 14:11 ` Quentin Perret
2020-12-07 14:11 ` Quentin Perret
2020-12-07 14:11 ` Quentin Perret
2020-12-08 9:40 ` Will Deacon
2020-12-08 9:40 ` Will Deacon
2020-12-08 9:40 ` Will Deacon
2020-11-17 18:15 ` [RFC PATCH 17/27] KVM: arm64: Elevate Hyp mappings creation at EL2 Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 18/27] KVM: arm64: Use kvm_arch for stage 2 pgtable Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` [RFC PATCH 19/27] KVM: arm64: Use kvm_arch in kvm_s2_mmu Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:15 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 20/27] KVM: arm64: Set host stage 2 using kvm_nvhe_init_params Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 21/27] KVM: arm64: Refactor kvm_arm_setup_stage2() Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 22/27] KVM: arm64: Refactor __load_guest_stage2() Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 23/27] KVM: arm64: Refactor __populate_fault_info() Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 24/27] KVM: arm64: Make memcache anonymous in pgtable allocator Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 25/27] KVM: arm64: Reserve memory for host stage 2 Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 26/27] KVM: arm64: Sort the memblock regions list Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` [RFC PATCH 27/27] KVM: arm64: Wrap the host with a stage 2 Quentin Perret
2020-11-17 18:16 ` Quentin Perret
2020-11-17 18:16 ` Quentin Perret
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