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Message-ID: <863d923961a505af307ba679fe3cbb32@www.loen.fr>
Date: Fri, 15 Nov 2019 12:29:43 +0000
From: Marc Zyngier <maz@...nel.org>
To: Peng Fan <peng.fan@....com>
Cc: <catalin.marinas@....com>, <will@...nel.org>,
Alice Guo <alice.guo@....com>, <jan.kiszka@...mens.com>,
<linux-kernel@...r.kernel.org>, <ralf.ramsauer@...-regensburg.de>,
<james.morse@....com>, <allison@...utok.net>, <tglx@...utronix.de>,
<linux-arm-kernel@...ts.infradead.org>,
dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH 2/2] arm64: export __hyp_stub_vectors
On 2019-11-15 09:45, Peng Fan wrote:
> From: Peng Fan <peng.fan@....com>
>
> External hypervisors, like Jailhouse, need this address when they are
> deactivated, in order to restore original state.
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
> arch/arm64/include/asm/virt.h | 2 ++
> arch/arm64/kernel/hyp-stub.S | 1 +
> 2 files changed, 3 insertions(+)
>
> diff --git a/arch/arm64/include/asm/virt.h
> b/arch/arm64/include/asm/virt.h
> index 0958ed6191aa..b1b48353e3b3 100644
> --- a/arch/arm64/include/asm/virt.h
> +++ b/arch/arm64/include/asm/virt.h
> @@ -62,6 +62,8 @@
> */
> extern u32 __boot_cpu_mode[2];
>
> +extern char __hyp_stub_vectors[];
> +
> void __hyp_set_vectors(phys_addr_t phys_vector_base);
> void __hyp_reset_vectors(void);
>
> diff --git a/arch/arm64/kernel/hyp-stub.S
> b/arch/arm64/kernel/hyp-stub.S
> index f17af9a39562..22b728fb14bd 100644
> --- a/arch/arm64/kernel/hyp-stub.S
> +++ b/arch/arm64/kernel/hyp-stub.S
> @@ -38,6 +38,7 @@ ENTRY(__hyp_stub_vectors)
> ventry el1_fiq_invalid // FIQ 32-bit EL1
> ventry el1_error_invalid // Error 32-bit EL1
> ENDPROC(__hyp_stub_vectors)
> +EXPORT_SYMBOL(__hyp_stub_vectors);
NAK.
There is no in-tree users of this. If you're using jailhouse, you're
already patching your kernel, and you can carry this. Mainline doesn't
need this at all.
M.
--
Jazz is not dead. It just smells funny...
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