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From: David Gibson <david@gibson.dropbear.id.au>
To: matheus.ferst@eldorado.org.br
Cc: leandro.lupori@eldorado.org.br, danielhb413@gmail.com,
	richard.henderson@linaro.org, qemu-devel@nongnu.org,
	groug@kaod.org, qemu-ppc@nongnu.org
Subject: Re: [PATCH v2 0/2] Require hypervisor privilege for tlbie[l] when PSR=0 and HR=1.
Date: Mon, 20 Sep 2021 17:40:41 +1000	[thread overview]
Message-ID: <YUg6+bSxKT0AbKAw@yekko> (raw)
In-Reply-To: <20210917114751.206845-1-matheus.ferst@eldorado.org.br>

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On Fri, Sep 17, 2021 at 08:47:49AM -0300, matheus.ferst@eldorado.org.br wrote:
> From: Matheus Ferst <matheus.ferst@eldorado.org.br>
> 
> While working on FreeBSD radix support, Leandro Lupori (CC'ed) noticed
> that the latest build still fails in KVM but works in TCG[1]. This
> difference occurs because the current implementation of "tlbiel" does
> not validate the instruction parameters and always check for supervisor
> privilege.
> 
> This patch series partially address this problem by requiring hypervisor
> privilege for radix mode when PSR=0. The validation of other parameters
> can be done when we move storage control instructions to decodetree.
> 
> [1] To reproduce the issue, grab an ISO from [2] run qemu as
> 
> qemu-system-ppc64 -cpu power9 -m 2G \
>     -machine pseries,cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken,cap-ccf-assist=off \
>     -boot d -vga none -nographic -cdrom FreeBSD-14.0-CURRENT-powerpc-*.iso
> 
> or
> 
> qemu-system-ppc64 -cpu power9 -m 2G -enable-kvm \
>     -machine pseries,cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken,cap-ccf-assist=off \
>     -boot d -vga none -nographic -cdrom FreeBSD-14.0-CURRENT-powerpc-*.iso
> 
> Stop the boot at the prompt and use
> 
> OK set radix_mmu=1
> OK boot
> 
> [2]
> https://download.freebsd.org/ftp/snapshots/powerpc/powerpc64/ISO-IMAGES/14.0/

Applied to ppc-for-6.2, thanks.

> 
> Matheus Ferst (2):
>   target/ppc: add LPCR[HR] to DisasContext and hflags
>   target/ppc: Check privilege level based on PSR and LPCR[HR] in
>     tlbie[l]
> 
>  target/ppc/cpu.h         |  1 +
>  target/ppc/helper_regs.c |  3 +++
>  target/ppc/translate.c   | 28 +++++++++++++++++++++++-----
>  3 files changed, 27 insertions(+), 5 deletions(-)
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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      parent reply	other threads:[~2021-09-20  7:46 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-17 11:47 [PATCH v2 0/2] Require hypervisor privilege for tlbie[l] when PSR=0 and HR=1 matheus.ferst
2021-09-17 11:47 ` [PATCH v2 1/2] target/ppc: add LPCR[HR] to DisasContext and hflags matheus.ferst
2021-09-17 11:47 ` [PATCH v2 2/2] target/ppc: Check privilege level based on PSR and LPCR[HR] in tlbie[l] matheus.ferst
2021-09-17 14:17 ` [PATCH v2 0/2] Require hypervisor privilege for tlbie[l] when PSR=0 and HR=1 Daniel Henrique Barboza
2021-09-20  7:40 ` David Gibson [this message]

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