From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: [RFC 19/24] xen/arm: Create a fake PSCI node in dom0 device tree Date: Fri, 16 Aug 2013 22:05:51 +0100 Message-ID: <1376687156-6737-20-git-send-email-julien.grall@linaro.org> References: <1376687156-6737-1-git-send-email-julien.grall@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1376687156-6737-1-git-send-email-julien.grall@linaro.org> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: stefano.stabellini@eu.citrix.com, ian.campbell@citrix.com Cc: xen-devel@lists.xen.org, Julien Grall , andre.przywara@linaro.org, patches@linaro.org List-Id: xen-devel@lists.xenproject.org Xen uses PSCI to bring up secondary cpus for the guest. Signed-off-by: Julien Grall --- xen/arch/arm/domain_build.c | 44 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 567b1fe..d8d67a6 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include @@ -283,6 +284,44 @@ static int make_hypervisor_node(void *fdt, const struct dt_device_node *parent) return res; } +static int make_psci_node(void *fdt, const struct dt_device_node *parent) +{ + int res; + __be32 reg[0]; + __be32 *cells; + + DPRINT("Create PSCI node\n"); + + /* See linux Documentation/devicetree/bindings/arm/psci.txt */ + res = fdt_begin_node(fdt, "psci"); + if ( res ) + return res; + + res = fdt_property_string(fdt, "compatible", "arm,psci"); + if ( res ) + return res; + + res = fdt_property_string(fdt, "method", "hvc"); + if ( res ) + return res; + + cells = ®[0]; + dt_set_cell(&cells, 1, __PSCI_cpu_off); + res = fdt_property(fdt, "cpu_off", reg, sizeof(reg[0])); + if ( res ) + return res; + + cells = ®[0]; + dt_set_cell(&cells, 1, __PSCI_cpu_on); + res = fdt_property(fdt, "cpu_on", reg, sizeof(reg[0])); + if ( res ) + return res; + + res = fdt_end_node(fdt); + + return res; +} + /* Map the device in the domain */ static int map_device(struct domain *d, const struct dt_device_node *dev) { @@ -367,6 +406,7 @@ static const struct dt_device_match skip_matches[] __initconst = { DT_MATCH_COMPATIBLE("xen,xen"), DT_MATCH_COMPATIBLE("xen,multiboot-module"), + DT_MATCH_COMPATIBLE("arm,psci"), { /* sentinel */ }, }; @@ -412,6 +452,10 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo, res = make_hypervisor_node(kinfo->fdt, np); if ( res ) return res; + + res = make_psci_node(kinfo->fdt, np); + if ( res ) + return res; } res = fdt_end_node(kinfo->fdt); -- 1.7.10.4