From: Shannon Zhao <shannon.zhao@linaro.org>
To: linux-arm-kernel@lists.infradead.org,
stefano.stabellini@citrix.com, david.vrabel@citrix.com
Cc: devicetree@vger.kernel.org, linux-efi@vger.kernel.org,
catalin.marinas@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org, peter.huangpeng@huawei.com,
julien.grall@arm.com, shannon.zhao@linaro.org,
zhaoshenglong@huawei.com, xen-devel@lists.xen.org
Subject: [PATCH v7 11/17] ARM: XEN: Move xen_early_init() before efi_init()
Date: Thu, 24 Mar 2016 22:44:30 +0800 [thread overview]
Message-ID: <1458830676-27075-12-git-send-email-shannon.zhao__30895.1362771497$1458830938$gmane$org@linaro.org> (raw)
In-Reply-To: <1458830676-27075-1-git-send-email-shannon.zhao@linaro.org>
Move xen_early_init() before efi_init(), then when calling efi_init()
could initialize Xen specific UEFI.
Check if it runs on Xen hypervisor through the flat dts.
Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
arch/arm/xen/enlighten.c | 56 ++++++++++++++++++++++++++++++++++-------------
arch/arm64/kernel/setup.c | 2 +-
2 files changed, 42 insertions(+), 16 deletions(-)
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 680aae0..c43617f 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -20,6 +20,7 @@
#include <linux/irqreturn.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_fdt.h>
#include <linux/of_irq.h>
#include <linux/of_address.h>
#include <linux/cpuidle.h>
@@ -53,8 +54,6 @@ struct xen_memory_region xen_extra_mem[XEN_EXTRA_MEM_MAX_REGIONS] __initdata;
static __read_mostly unsigned int xen_events_irq;
-static __initdata struct device_node *xen_node;
-
int xen_remap_domain_gfn_array(struct vm_area_struct *vma,
unsigned long addr,
xen_pfn_t *gfn, int nr,
@@ -238,6 +237,33 @@ static irqreturn_t xen_arm_callback(int irq, void *arg)
return IRQ_HANDLED;
}
+static __initdata struct {
+ const char *compat;
+ const char *prefix;
+ const char *version;
+ bool found;
+} hyper_node = {"xen,xen", "xen,xen-", NULL, false};
+
+static int __init fdt_find_hyper_node(unsigned long node, const char *uname,
+ int depth, void *data)
+{
+ const void *s = NULL;
+ int len;
+
+ if (depth != 1 || strcmp(uname, "hypervisor") != 0)
+ return 0;
+
+ if (of_flat_dt_is_compatible(node, hyper_node.compat))
+ hyper_node.found = true;
+
+ s = of_get_flat_dt_prop(node, "compatible", &len);
+ if (strlen(hyper_node.prefix) + 3 < len &&
+ !strncmp(hyper_node.prefix, s, strlen(hyper_node.prefix)))
+ hyper_node.version = s + strlen(hyper_node.prefix);
+
+ return 0;
+}
+
/*
* see Documentation/devicetree/bindings/arm/xen.txt for the
* documentation of the Xen Device Tree format.
@@ -245,26 +271,18 @@ static irqreturn_t xen_arm_callback(int irq, void *arg)
#define GRANT_TABLE_PHYSADDR 0
void __init xen_early_init(void)
{
- int len;
- const char *s = NULL;
- const char *version = NULL;
- const char *xen_prefix = "xen,xen-";
-
- xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
- if (!xen_node) {
+ of_scan_flat_dt(fdt_find_hyper_node, NULL);
+ if (!hyper_node.found) {
pr_debug("No Xen support\n");
return;
}
- s = of_get_property(xen_node, "compatible", &len);
- if (strlen(xen_prefix) + 3 < len &&
- !strncmp(xen_prefix, s, strlen(xen_prefix)))
- version = s + strlen(xen_prefix);
- if (version == NULL) {
+
+ if (hyper_node.version == NULL) {
pr_debug("Xen version not found\n");
return;
}
- pr_info("Xen %s support found\n", version);
+ pr_info("Xen %s support found\n", hyper_node.version);
xen_domain_type = XEN_HVM_DOMAIN;
@@ -305,6 +323,14 @@ static void __init xen_acpi_guest_init(void)
static void __init xen_dt_guest_init(void)
{
+ struct device_node *xen_node;
+
+ xen_node = of_find_compatible_node(NULL, NULL, "xen,xen");
+ if (!xen_node) {
+ pr_err("Xen support was detected before, but it has disappeared\n");
+ return;
+ }
+
xen_events_irq = irq_of_parse_and_map(xen_node, 0);
}
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 450987d..6cf5051 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -313,6 +313,7 @@ void __init setup_arch(char **cmdline_p)
*/
local_async_enable();
+ xen_early_init();
efi_init();
arm64_memblock_init();
@@ -334,7 +335,6 @@ void __init setup_arch(char **cmdline_p)
} else {
psci_acpi_init();
}
- xen_early_init();
cpu_read_bootcpu_ops();
smp_init_cpus();
--
2.1.4
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
next prev parent reply other threads:[~2016-03-24 14:44 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1458830676-27075-1-git-send-email-shannon.zhao@linaro.org>
2016-03-24 14:44 ` [PATCH v7 01/17] Xen: ACPI: Hide UART used by Xen Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 02/17] xen/grant-table: Move xlated_setup_gnttab_pages to common place Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 03/17] Xen: xlate: Use page_to_xen_pfn instead of page_to_pfn Shannon Zhao
2016-03-29 16:28 ` Julien Grall
[not found] ` <56FAAD48.2010401@arm.com>
2016-03-30 7:38 ` Shannon Zhao
[not found] ` <56FB8258.7030303@huawei.com>
2016-03-30 11:22 ` Julien Grall
[not found] ` <56FBB709.5050802@arm.com>
2016-03-30 12:42 ` Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 04/17] arm/xen: Use xen_xlate_map_ballooned_pages to setup grant table Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 05/17] xen: memory : Add new XENMAPSPACE type XENMAPSPACE_dev_mmio Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 06/17] Xen: ARM: Add support for mapping platform device mmio Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 07/17] Xen: ARM: Add support for mapping AMBA " Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 08/17] Xen: public/hvm: sync changes of HVM_PARAM_CALLBACK_VIA ABI from Xen Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 10/17] arm/xen: Get event-channel irq through HVM_PARAM when booting with ACPI Shannon Zhao
2016-03-29 16:35 ` Julien Grall
[not found] ` <56FAAEED.7060108@arm.com>
2016-03-30 7:34 ` Shannon Zhao
2016-03-24 14:44 ` Shannon Zhao [this message]
2016-03-24 14:44 ` [PATCH v7 12/17] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 13/17] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 14/17] XEN: EFI: Move x86 specific codes to architecture directory Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 15/17] ARM64: XEN: Add a function to initialize Xen specific UEFI runtime services Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 16/17] FDT: Add a helper to get the subnode by given name Shannon Zhao
2016-03-24 14:44 ` [PATCH v7 17/17] Xen: EFI: Parse DT parameters for Xen specific UEFI Shannon Zhao
[not found] ` <1458830676-27075-2-git-send-email-shannon.zhao@linaro.org>
2016-03-24 15:08 ` [PATCH v7 01/17] Xen: ACPI: Hide UART used by Xen Rafael J. Wysocki
[not found] ` <CAJZ5v0iGHj1Hb3s=uJ34j0m88+3xtBQhbX47got=z1Ah_=LrkQ@mail.gmail.com>
2016-03-25 7:38 ` Shannon Zhao
2016-03-25 8:05 ` [PATCH v8 " Shannon Zhao
[not found] ` <1458893149-17388-1-git-send-email-zhaoshenglong@huawei.com>
2016-03-25 17:00 ` Rafael J. Wysocki
2016-03-25 17:15 ` Bjorn Helgaas
[not found] ` <7418231.W9aSFKr1zs@vostro.rjw.lan>
2016-03-26 13:14 ` Stefano Stabellini
[not found] ` <20160325171547.GB29822@localhost>
2016-03-26 12:44 ` Stefano Stabellini
2016-03-29 8:00 ` Shannon Zhao
2016-03-29 8:08 ` [RESEND PATCH v9 " Shannon Zhao
[not found] ` <1458830676-27075-12-git-send-email-shannon.zhao@linaro.org>
2016-03-26 12:54 ` [PATCH v7 11/17] ARM: XEN: Move xen_early_init() before efi_init() Stefano Stabellini
[not found] ` <alpine.DEB.2.02.1603261252510.18380@kaball.uk.xensource.com>
2016-03-29 16:07 ` Will Deacon
[not found] ` <20160329160756.GG6745@arm.com>
2016-03-31 11:12 ` Stefano Stabellini
[not found] ` <1458830676-27075-13-git-send-email-shannon.zhao@linaro.org>
2016-03-26 12:56 ` [PATCH v7 12/17] ARM64: ACPI: Check if it runs on Xen to enable or disable ACPI Stefano Stabellini
2016-03-29 16:18 ` Will Deacon
[not found] ` <20160329161837.GH6745@arm.com>
2016-03-29 16:31 ` Mark Rutland
[not found] ` <20160329163147.GB27223@leverpostej>
2016-03-30 7:19 ` Shannon Zhao
[not found] ` <56FB7E00.7030400@huawei.com>
2016-03-31 11:04 ` Stefano Stabellini
[not found] ` <alpine.DEB.2.02.1603311155450.11739@kaball.uk.xensource.com>
2016-03-31 11:44 ` Ard Biesheuvel
[not found] ` <CAKv+Gu-wPq_FzO3sm7bhSFuu7EVxHWB_v6HOn1GqNbdaE-iBoQ@mail.gmail.com>
2016-03-31 12:42 ` Mark Rutland
[not found] ` <20160331124216.GE26532@leverpostej>
2016-04-01 9:25 ` Shannon Zhao
[not found] ` <56FE3E85.60403@huawei.com>
2016-04-01 9:32 ` Shannon Zhao
[not found] ` <1458830676-27075-14-git-send-email-shannon.zhao@linaro.org>
2016-03-29 17:21 ` [PATCH v7 13/17] ARM: Xen: Document UEFI support on Xen ARM virtual platforms Julien Grall
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='1458830676-27075-12-git-send-email-shannon.zhao__30895.1362771497$1458830938$gmane$org@linaro.org' \
--to=shannon.zhao@linaro.org \
--cc=catalin.marinas@arm.com \
--cc=david.vrabel@citrix.com \
--cc=devicetree@vger.kernel.org \
--cc=julien.grall@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=peter.huangpeng@huawei.com \
--cc=stefano.stabellini@citrix.com \
--cc=will.deacon@arm.com \
--cc=xen-devel@lists.xen.org \
--cc=zhaoshenglong@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).