[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH V1 19/29] xen/arm: Create a fake PSCI node in dom0 device tree
On 09/09/2013 12:41 PM, Ian Campbell wrote: On Wed, 2013-08-28 at 15:47 +0100, Julien Grall wrote:Xen uses PSCI to bring up secondary cpus for the guest.Does this account for/incorporate the changes in "dt: update PSCI binding documentation for v0.2" from Rob Herring? Msg-di <1377564633-31638-1-git-send-email-robherring2@xxxxxxxxx> That might require actual code changes in Xen too I suppose? I don't think, the PSCI code in Xen is generic. We will only have to update the current patch. Do you know if Linux supports PSCI 0.2? Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx> --- Changes in v2: - Use fdt_property_cell --- xen/arch/arm/domain_build.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c index 11f247b..4c936c1 100644 --- a/xen/arch/arm/domain_build.c +++ b/xen/arch/arm/domain_build.c @@ -13,6 +13,7 @@ #include <xen/guest_access.h> #include <asm/setup.h> #include <asm/platform.h> +#include <asm/psci.h> #include <asm/gic.h> #include <xen/irq.h> @@ -306,6 +307,38 @@ 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; + + 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; + + res = fdt_property_cell(fdt, "cpu_off", __PSCI_cpu_off); + if ( res ) + return res; + + res = fdt_property_cell(fdt, "cpu_on", __PSCI_cpu_on); + 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) { @@ -393,6 +426,7 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo, { DT_MATCH_COMPATIBLE("xen,xen"), DT_MATCH_COMPATIBLE("xen,multiboot-module"), + DT_MATCH_COMPATIBLE("arm,psci"), { /* sentinel */ }, }; const struct dt_device_node *child; @@ -458,6 +492,10 @@ 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); -- Julien Grall _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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