From: Marc Zyngier <maz@kernel.org>
To: David Brazdil <dbrazdil@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu
Subject: Re: [PATCH 03/15] arm64: kvm: Fix symbol dependency in __hyp_call_panic_nvhe
Date: Thu, 07 May 2020 14:22:34 +0100 [thread overview]
Message-ID: <87blmzj2w5.wl-maz@kernel.org> (raw)
In-Reply-To: <20200430144831.59194-4-dbrazdil@google.com>
On Thu, 30 Apr 2020 15:48:19 +0100,
David Brazdil <dbrazdil@google.com> wrote:
>
> __hyp_call_panic_nvhe contains inline assembly which did not declare
> its dependency on the __hyp_panic_string symbol.
>
> Signed-off-by: David Brazdil <dbrazdil@google.com>
> ---
> arch/arm64/kvm/hyp/switch.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
> index 8a1e81a400e0..7a7c08029d81 100644
> --- a/arch/arm64/kvm/hyp/switch.c
> +++ b/arch/arm64/kvm/hyp/switch.c
> @@ -836,7 +836,7 @@ static void __hyp_text __hyp_call_panic_nvhe(u64 spsr, u64 elr, u64 par,
> * making sure it is a kernel address and not a PC-relative
> * reference.
> */
> - asm volatile("ldr %0, =__hyp_panic_string" : "=r" (str_va));
> + asm volatile("ldr %0, =%1" : "=r" (str_va) : "S" (__hyp_panic_string));
>
> __hyp_do_panic(str_va,
> spsr, elr,
> --
> 2.26.1
>
>
What breaks without this constraint? Is it a fix that should go in
early? Otherwise looks good.
Thanks,
M.
--
Without deviation from the norm, progress is not possible.
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next prev parent reply other threads:[~2020-05-07 13:22 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 14:48 [PATCH 00/15] Split off nVHE hyp code David Brazdil
2020-04-30 14:48 ` [PATCH 01/15] arm64: kvm: Unify users of HVC instruction David Brazdil
2020-05-07 14:01 ` Marc Zyngier
2020-05-07 14:36 ` Quentin Perret
2020-05-13 10:30 ` David Brazdil
2020-04-30 14:48 ` [PATCH 02/15] arm64: kvm: Formalize host-hyp hypcall ABI David Brazdil
2020-05-07 13:10 ` Marc Zyngier
2020-05-07 13:33 ` Quentin Perret
2020-05-10 10:16 ` Marc Zyngier
2020-05-13 10:48 ` David Brazdil
2020-04-30 14:48 ` [PATCH 03/15] arm64: kvm: Fix symbol dependency in __hyp_call_panic_nvhe David Brazdil
2020-05-07 13:22 ` Marc Zyngier [this message]
2020-05-07 14:36 ` David Brazdil
2020-05-10 11:14 ` Marc Zyngier
2020-04-30 14:48 ` [PATCH 04/15] arm64: kvm: Add build rules for separate nVHE object files David Brazdil
2020-05-07 13:46 ` Marc Zyngier
2020-04-30 14:48 ` [PATCH 05/15] arm64: kvm: Build hyp-entry.S separately for VHE/nVHE David Brazdil
2020-05-07 15:07 ` Marc Zyngier
2020-05-07 15:15 ` Marc Zyngier
2020-04-30 14:48 ` [PATCH 06/15] arm64: kvm: Move __smccc_workaround_1_smc to .rodata David Brazdil
2020-05-11 10:04 ` Marc Zyngier
2020-05-11 10:29 ` Will Deacon
2020-04-30 14:48 ` [PATCH 07/15] arm64: kvm: Split hyp/tlb.c to VHE/nVHE David Brazdil
2020-04-30 14:48 ` [PATCH 08/15] arm64: kvm: Split hyp/switch.c " David Brazdil
2020-04-30 14:48 ` [PATCH 09/15] arm64: kvm: Split hyp/debug-sr.c " David Brazdil
2020-04-30 14:48 ` [PATCH 10/15] arm64: kvm: Split hyp/sysreg-sr.c " David Brazdil
2020-04-30 14:48 ` [PATCH 11/15] arm64: kvm: Split hyp/timer-sr.c " David Brazdil
2020-04-30 14:48 ` [PATCH 12/15] arm64: kvm: Compile remaining hyp/ files for both VHE/nVHE David Brazdil
2020-04-30 14:48 ` [PATCH 13/15] arm64: kvm: Add comments around __hyp_text_ symbol aliases David Brazdil
2020-04-30 14:48 ` [PATCH 14/15] arm64: kvm: Remove __hyp_text macro, use build rules instead David Brazdil
2020-04-30 14:48 ` [PATCH 15/15] arm64: kvm: Lift instrumentation restrictions on VHE David Brazdil
2020-04-30 17:53 ` [PATCH 00/15] Split off nVHE hyp code Marc Zyngier
2020-04-30 18:57 ` David Brazdil
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