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From: Julien Grall <julien.grall@arm.com>
To: Wei Chen <Wei.Chen@arm.com>, xen-devel@lists.xen.org
Cc: Kaly.Xin@arm.com, nd@arm.com, sstabellini@kernel.org,
	steve.capper@arm.com
Subject: Re: [PATCH v2 05/19] xen/arm: Avoid setting/clearing HCR_RW at every context switch
Date: Thu, 30 Mar 2017 18:12:57 +0100	[thread overview]
Message-ID: <215204c4-8145-3421-d2e6-c1f6ca5ffbe1@arm.com> (raw)
In-Reply-To: <1490865209-18283-6-git-send-email-Wei.Chen@arm.com>

Hi Wei,

On 30/03/17 10:13, Wei Chen wrote:
> The HCR_EL2 flags for 64-bit and 32-bit domains are different. But
> when we initialized the HCR_EL2 for vcpu0 of Dom0 and all vcpus of
> DomU in vcpu_initialise, we didn't know the domain's address size
> information. We had to use compatible flags to initialize HCR_EL2,
> and set HCR_RW for 64-bit domain or clear HCR_RW for 32-bit domain
> at every context switch.
>
> But, after we added the HCR_EL2 to vcpu's context, this behaviour
> seems a little fussy. We can update the HCR_RW bit in vcpu's context
> as soon as we get the domain's address size to avoid setting/clearing
> HCR_RW at every context switch.
>
> Signed-off-by: Wei Chen <Wei.Chen@arm.com>

Acked-by: Julien Grall <julien.grall@arm.com>

Cheers,

-- 
Julien Grall

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  reply	other threads:[~2017-03-30 17:12 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-30  9:13 [PATCH v2 00/19] Provide a command line option to choose how to handle SErrors Wei Chen
2017-03-30  9:13 ` [PATCH v2 01/19] xen/arm: Save ESR_EL2 to avoid using mismatched value in syndrome check Wei Chen
2017-03-30 13:31   ` Julien Grall
2017-03-31  3:26     ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 02/19] xen/arm: Remove vwfi while setting HCR_EL2 in init_traps Wei Chen
2017-03-30 17:05   ` Julien Grall
2017-03-30 22:29     ` Stefano Stabellini
2017-03-31  5:58       ` Wei Chen
2017-03-31  8:34       ` Julien Grall
2017-03-30  9:13 ` [PATCH v2 03/19] xen/arm: Move parse_vwfi from trap.c to domain.c Wei Chen
2017-03-30  9:13 ` [PATCH v2 04/19] xen/arm: Restore HCR_EL2 register Wei Chen
2017-03-30 17:07   ` Julien Grall
2017-03-30 22:03     ` Stefano Stabellini
2017-03-31  2:10       ` Wei Chen
2017-03-31  8:39         ` Julien Grall
2017-03-31  8:59           ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 05/19] xen/arm: Avoid setting/clearing HCR_RW at every context switch Wei Chen
2017-03-30 17:12   ` Julien Grall [this message]
2017-03-30 21:21   ` Stefano Stabellini
2017-03-30  9:13 ` [PATCH v2 06/19] xen/arm: Save HCR_EL2 when a guest took the SError Wei Chen
2017-03-30  9:13 ` [PATCH v2 07/19] xen/arm: Introduce a virtual abort injection helper Wei Chen
2017-03-30 17:20   ` Julien Grall
2017-03-30 21:24     ` Stefano Stabellini
2017-03-31  5:25     ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 08/19] xen/arm: Introduce a command line parameter for SErrors/Aborts Wei Chen
2017-03-30 17:39   ` Julien Grall
2017-03-31  5:28     ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 09/19] xen/arm: Introduce a initcall to update cpu_hwcaps by serror_op Wei Chen
2017-03-30 17:51   ` Julien Grall
2017-03-30 18:02   ` Julien Grall
2017-03-30 21:28     ` Stefano Stabellini
2017-03-31  8:50       ` Julien Grall
2017-03-30  9:13 ` [PATCH v2 10/19] xen/arm64: Use alternative to skip the check of pending serrors Wei Chen
2017-03-30  9:13 ` [PATCH v2 11/19] xen/arm32: " Wei Chen
2017-03-30 18:06   ` Julien Grall
2017-03-30 21:29     ` Stefano Stabellini
2017-03-31  5:33       ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 12/19] xen/arm: Move macro VABORT_GEN_BY_GUEST to common header Wei Chen
2017-03-30 21:36   ` Stefano Stabellini
2017-03-31  5:35     ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 13/19] xen/arm: Introduce new helpers to handle guest/hyp SErrors Wei Chen
2017-03-30  9:13 ` [PATCH v2 14/19] xen/arm: Replace do_trap_guest_serror with new helpers Wei Chen
2017-03-30  9:13 ` [PATCH v2 15/19] xen/arm: Unmask the Abort/SError bit in the exception entries Wei Chen
2017-03-30  9:13 ` [PATCH v2 16/19] xen/arm: Introduce a helper to synchronize SError Wei Chen
2017-03-30 18:28   ` Julien Grall
2017-03-30 18:32     ` Julien Grall
2017-03-30 18:37       ` Julien Grall
2017-03-31  5:51         ` Wei Chen
2017-03-31 10:55         ` Wei Chen
2017-03-31 11:06           ` Julien Grall
2017-03-31 11:09             ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 17/19] xen/arm: Isolate the SError between the context switch of 2 vCPUs Wei Chen
2017-03-30 21:49   ` Stefano Stabellini
2017-03-30 22:00     ` Julien Grall
2017-03-31  5:52       ` Wei Chen
2017-03-30  9:13 ` [PATCH v2 18/19] xen/arm: Prevent slipping hypervisor SError to guest Wei Chen
2017-03-30  9:13 ` [PATCH v2 19/19] xen/arm: Handle guest external abort as guest SError Wei Chen

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