Re: [PATCH v5 04/21] arm64: Provide an 'upgrade to VHE' stub hypercall

[PATCH v5 00/21] arm64: Early CPU feature override, and applications to VHE, BTI and PAuth · Marc Zyngier <maz@kernel.org> · 2021-01-26
[PATCH v5 08/21] arm64: Move SCTLR_EL1 initialisation to EL-agnostic code · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 07/21] arm64: Simplify init_el2_state to be non-VHE only · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 07/21] arm64: Simplify init_el2_state to be non-VHE only · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-25
[PATCH v5 10/21] arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding() · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 10/21] arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding() · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26
[PATCH v5 12/21] arm64: cpufeature: Add an early command-line cpufeature override facility · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 12/21] arm64: cpufeature: Add an early command-line cpufeature override facility · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-25
[PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Ard Biesheuvel <ardb@kernel.org> · 2021-01-25
Re: [PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Ard Biesheuvel <ardb@kernel.org> · 2021-01-26
Re: [PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure · Ard Biesheuvel <ardb@kernel.org> · 2021-01-25
[PATCH v5 17/21] KVM: arm64: Document HVC_VHE_RESTART stub hypercall · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 21/21] arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 19/21] arm64: cpufeatures: Allow disabling of BTI from the command-line · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 11/21] arm64: Extract early FDT mapping from kaslr_early_init() · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 15/21] arm64: Add an aliasing facility for the idreg override · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 14/21] arm64: Honor VHE being disabled from the command-line · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 14/21] arm64: Honor VHE being disabled from the command-line · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-25
[PATCH v5 20/21] arm64: Defer enabling pointer authentication on boot core · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 13/21] arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 13/21] arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line · Suzuki K Poulose <suzuki.poulose@arm.com> · 2021-01-25
Re: [PATCH v5 13/21] arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line · Marc Zyngier <maz@kernel.org> · 2021-01-25
Re: [PATCH v5 13/21] arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26
[PATCH v5 16/21] arm64: Make kvm-arm.mode={nvhe, protected} an alias of id_aa64mmfr1.vh=0 · Marc Zyngier <maz@kernel.org> · 2021-01-25
[PATCH v5 05/21] arm64: Initialise as nVHE before switching to VHE · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 05/21] arm64: Initialise as nVHE before switching to VHE · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26
[PATCH v5 06/21] arm64: Move VHE-specific SPE setup to mutate_to_vhe() · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 06/21] arm64: Move VHE-specific SPE setup to mutate_to_vhe() · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26
[PATCH v5 04/21] arm64: Provide an 'upgrade to VHE' stub hypercall · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 04/21] arm64: Provide an 'upgrade to VHE' stub hypercall · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26
[PATCH v5 01/21] arm64: Fix labels in el2_setup macros · Marc Zyngier <maz@kernel.org> · 2021-01-26
[PATCH v5 02/21] arm64: Fix outdated TCR setup comment · Marc Zyngier <maz@kernel.org> · 2021-01-26
[PATCH v5 03/21] arm64: Turn the MMU-on sequence into a macro · Marc Zyngier <maz@kernel.org> · 2021-01-26
[PATCH v5 09/21] arm64: cpufeature: Add global feature override facility · Marc Zyngier <maz@kernel.org> · 2021-01-26
Re: [PATCH v5 09/21] arm64: cpufeature: Add global feature override facility · Catalin Marinas <catalin.marinas@arm.com> · 2021-01-26

From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2021-01-26 19:23:04
Also in: kvmarm, lkml

On Mon, Jan 25, 2021 at 10:50:02AM +0000, Marc Zyngier wrote:

As we are about to change the way a VHE system boots, let's
provide the core helper, in the form of a stub hypercall that
enables VHE and replicates the full EL1 context at EL2, thanks
to EL1 and VHE-EL2 being extremely similar.

On exception return, the kernel carries on at EL2. Fancy!

Nothing calls this new hypercall yet, so no functional change.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: David Brazdil <redacted>

Acked-by: Catalin Marinas <catalin.marinas@arm.com>

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