From: Tony Breeds <tony@bakeyournoodle•com>
To: ehrhardt@linux•vnet.ibm.com
Cc: linuxppc-dev@ozlabs•org, embedded-hypervisor@power•org,
hollisb@us•ibm.com, kvm-ppc@vger•kernel.org
Subject: Re: [PATCH 5/6] kvmppc: magic page paravirtualization - guest part
Date: Thu, 24 Jul 2008 11:59:25 +1000 [thread overview]
Message-ID: <20080724015925.GL20457@bakeyournoodle.com> (raw)
In-Reply-To: <1216802207-32675-6-git-send-email-ehrhardt@linux.vnet.ibm.com>
On Wed, Jul 23, 2008 at 10:36:46AM +0200, ehrhardt@linux•vnet.ibm.com wrote:
Hi Christian,
<snip>
> +/*
> + * this is guest memory granted to the hypervisor;
> + * the hypervisor can place data in this area and rewrite
> + * privileged instructions to read from this area without
> + * trapping.
> + * Only the Hypervisor needs to be aware of the structure layout
> + * which makes the guest more felxible - the guest only guarantees
> + * the size which is requested by the hypervisor and read from a
> + * device tree entry.
> + */
> +void *kvm_magicpage;
static?
<snip>
> +/* reads the specified data field out of the hypervisor node */
> +static inline int kvmppc_pv_read_data(char *dtcell)
> +{
> + struct device_node *dn;
> + const int *dtval;
> +
> + dn = of_find_node_by_path("/hypervisor");
> + if (!dn)
> + return -EINVAL;
> +
> + dtval = of_get_property(dn, dtcell, NULL);
> + if (dtval)
> + return *dtval;
> + else
> + return -EINVAL;
You need an of_node_put(dn) in this function somewhere.
Yours Tony
linux.conf.au http://www.marchsouth.org/
Jan 19 - 24 2009 The Australian Linux Technical Conference!
next prev parent reply other threads:[~2008-07-24 1:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-23 8:36 [PATCH 0/6][RFC] kvmppc: paravirtualization interface ehrhardt
2008-07-23 8:36 ` [PATCH 1/6] kvmppc: read device tree hypervisor node infrastructure ehrhardt
2008-07-24 1:41 ` Tony Breeds
2008-07-24 7:44 ` Christian Ehrhardt
2008-07-23 8:36 ` [PATCH 2/6] kvmppc: add hypercall infrastructure - host part ehrhardt
2008-07-24 1:43 ` Tony Breeds
2008-07-30 13:41 ` Geert Uytterhoeven
2008-07-23 8:36 ` [PATCH 3/6] kvmppc: add hypercall infrastructure - guest part ehrhardt
2008-07-24 1:45 ` Tony Breeds
2008-07-24 7:56 ` Christian Ehrhardt
2008-07-23 8:36 ` [PATCH 4/6] kvmppc: magic page hypercall - host part ehrhardt
2008-07-24 1:49 ` Tony Breeds
2008-07-23 8:36 ` [PATCH 5/6] kvmppc: magic page paravirtualization - guest part ehrhardt
2008-07-24 1:59 ` Tony Breeds [this message]
2008-07-23 8:36 ` [PATCH 6/6] kvmppc: kvm-userspace: device tree modification for magicpage ehrhardt
2008-07-24 2:01 ` [PATCH 0/6][RFC] kvmppc: paravirtualization interface Tony Breeds
2008-07-24 8:17 ` Christian Ehrhardt
2008-07-25 1:08 ` Tony Breeds
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