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Message-Id: <20170302175357.8222-5-vkuznets@redhat.com>
Date: Thu, 2 Mar 2017 18:53:40 +0100
From: Vitaly Kuznetsov <vkuznets@...hat.com>
To: xen-devel@...ts.xenproject.org
Cc: x86@...nel.org, linux-kernel@...r.kernel.org,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>,
Andrew Jones <drjones@...hat.com>
Subject: [PATCH v2 04/21] x86/xen: split off enlighten_pvh.c
Create enlighten_pvh.c by splitting off PVH related code from enlighten.c,
put it under CONFIG_XEN_PVH.
Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
---
arch/x86/xen/Makefile | 2 +
arch/x86/xen/enlighten.c | 110 -----------------------------------------
arch/x86/xen/enlighten_pvh.c | 114 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 116 insertions(+), 110 deletions(-)
create mode 100644 arch/x86/xen/enlighten_pvh.c
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index cb0164a..348128b 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -15,6 +15,8 @@ obj-y := enlighten.o setup.o multicalls.o mmu.o irq.o \
grant-table.o suspend.o platform-pci-unplug.o \
p2m.o apic.o pmu.o
+obj-$(CONFIG_XEN_PVH) += enlighten_pvh.o
+
obj-$(CONFIG_EVENT_TRACING) += trace.o
obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index de77be9..d66debd 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -179,20 +179,6 @@ struct tls_descs {
*/
static DEFINE_PER_CPU(struct tls_descs, shadow_tls_desc);
-#ifdef CONFIG_XEN_PVH
-/*
- * PVH variables.
- *
- * xen_pvh and pvh_bootparams need to live in data segment since they
- * are used after startup_{32|64}, which clear .bss, are invoked.
- */
-bool xen_pvh __attribute__((section(".data"))) = 0;
-struct boot_params pvh_bootparams __attribute__((section(".data")));
-
-struct hvm_start_info pvh_start_info;
-unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
-#endif
-
static void clamp_max_cpus(void)
{
#ifdef CONFIG_SMP
@@ -1674,102 +1660,6 @@ asmlinkage __visible void __init xen_start_kernel(void)
#endif
}
-#ifdef CONFIG_XEN_PVH
-
-static void xen_pvh_arch_setup(void)
-{
-#ifdef CONFIG_ACPI
- /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
- if (nr_ioapics == 0)
- acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
-#endif
-}
-
-static void __init init_pvh_bootparams(void)
-{
- struct xen_memory_map memmap;
- unsigned int i;
- int rc;
-
- memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
-
- memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_map);
- set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_map);
- rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
- if (rc) {
- xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
- BUG();
- }
-
- if (memmap.nr_entries < E820MAX - 1) {
- pvh_bootparams.e820_map[memmap.nr_entries].addr =
- ISA_START_ADDRESS;
- pvh_bootparams.e820_map[memmap.nr_entries].size =
- ISA_END_ADDRESS - ISA_START_ADDRESS;
- pvh_bootparams.e820_map[memmap.nr_entries].type =
- E820_RESERVED;
- memmap.nr_entries++;
- } else
- xen_raw_printk("Warning: Can fit ISA range into e820\n");
-
- sanitize_e820_map(pvh_bootparams.e820_map,
- ARRAY_SIZE(pvh_bootparams.e820_map),
- &memmap.nr_entries);
-
- pvh_bootparams.e820_entries = memmap.nr_entries;
- for (i = 0; i < pvh_bootparams.e820_entries; i++)
- e820_add_region(pvh_bootparams.e820_map[i].addr,
- pvh_bootparams.e820_map[i].size,
- pvh_bootparams.e820_map[i].type);
-
- pvh_bootparams.hdr.cmd_line_ptr =
- pvh_start_info.cmdline_paddr;
-
- /* The first module is always ramdisk. */
- if (pvh_start_info.nr_modules) {
- struct hvm_modlist_entry *modaddr =
- __va(pvh_start_info.modlist_paddr);
- pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
- pvh_bootparams.hdr.ramdisk_size = modaddr->size;
- }
-
- /*
- * See Documentation/x86/boot.txt.
- *
- * Version 2.12 supports Xen entry point but we will use default x86/PC
- * environment (i.e. hardware_subarch 0).
- */
- pvh_bootparams.hdr.version = 0x212;
- pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
-}
-
-/*
- * This routine (and those that it might call) should not use
- * anything that lives in .bss since that segment will be cleared later.
- */
-void __init xen_prepare_pvh(void)
-{
- u32 msr;
- u64 pfn;
-
- if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
- xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
- pvh_start_info.magic);
- BUG();
- }
-
- xen_pvh = 1;
-
- msr = cpuid_ebx(xen_cpuid_base() + 2);
- pfn = __pa(hypercall_page);
- wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
-
- init_pvh_bootparams();
-
- x86_init.oem.arch_setup = xen_pvh_arch_setup;
-}
-#endif
-
void __ref xen_hvm_init_shared_info(void)
{
int cpu;
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
new file mode 100644
index 0000000..ba534ca
--- /dev/null
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -0,0 +1,114 @@
+#include <linux/acpi.h>
+
+#include <xen/hvc-console.h>
+
+#include <asm/hypervisor.h>
+
+#include <asm/xen/interface.h>
+#include <asm/xen/hypercall.h>
+
+#include <xen/interface/memory.h>
+#include <xen/interface/hvm/start_info.h>
+
+/*
+ * PVH variables.
+ *
+ * xen_pvh and pvh_bootparams need to live in data segment since they
+ * are used after startup_{32|64}, which clear .bss, are invoked.
+ */
+bool xen_pvh __attribute__((section(".data"))) = 0;
+struct boot_params pvh_bootparams __attribute__((section(".data")));
+
+struct hvm_start_info pvh_start_info;
+unsigned int pvh_start_info_sz = sizeof(pvh_start_info);
+
+static void xen_pvh_arch_setup(void)
+{
+ /* Make sure we don't fall back to (default) ACPI_IRQ_MODEL_PIC. */
+ if (nr_ioapics == 0)
+ acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
+}
+
+static void __init init_pvh_bootparams(void)
+{
+ struct xen_memory_map memmap;
+ unsigned int i;
+ int rc;
+
+ memset(&pvh_bootparams, 0, sizeof(pvh_bootparams));
+
+ memmap.nr_entries = ARRAY_SIZE(pvh_bootparams.e820_map);
+ set_xen_guest_handle(memmap.buffer, pvh_bootparams.e820_map);
+ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+ if (rc) {
+ xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
+ BUG();
+ }
+
+ if (memmap.nr_entries < E820MAX - 1) {
+ pvh_bootparams.e820_map[memmap.nr_entries].addr =
+ ISA_START_ADDRESS;
+ pvh_bootparams.e820_map[memmap.nr_entries].size =
+ ISA_END_ADDRESS - ISA_START_ADDRESS;
+ pvh_bootparams.e820_map[memmap.nr_entries].type =
+ E820_RESERVED;
+ memmap.nr_entries++;
+ } else
+ xen_raw_printk("Warning: Can fit ISA range into e820\n");
+
+ sanitize_e820_map(pvh_bootparams.e820_map,
+ ARRAY_SIZE(pvh_bootparams.e820_map),
+ &memmap.nr_entries);
+
+ pvh_bootparams.e820_entries = memmap.nr_entries;
+ for (i = 0; i < pvh_bootparams.e820_entries; i++)
+ e820_add_region(pvh_bootparams.e820_map[i].addr,
+ pvh_bootparams.e820_map[i].size,
+ pvh_bootparams.e820_map[i].type);
+
+ pvh_bootparams.hdr.cmd_line_ptr =
+ pvh_start_info.cmdline_paddr;
+
+ /* The first module is always ramdisk. */
+ if (pvh_start_info.nr_modules) {
+ struct hvm_modlist_entry *modaddr =
+ __va(pvh_start_info.modlist_paddr);
+ pvh_bootparams.hdr.ramdisk_image = modaddr->paddr;
+ pvh_bootparams.hdr.ramdisk_size = modaddr->size;
+ }
+
+ /*
+ * See Documentation/x86/boot.txt.
+ *
+ * Version 2.12 supports Xen entry point but we will use default x86/PC
+ * environment (i.e. hardware_subarch 0).
+ */
+ pvh_bootparams.hdr.version = 0x212;
+ pvh_bootparams.hdr.type_of_loader = (9 << 4) | 0; /* Xen loader */
+}
+
+/*
+ * This routine (and those that it might call) should not use
+ * anything that lives in .bss since that segment will be cleared later.
+ */
+void __init xen_prepare_pvh(void)
+{
+ u32 msr;
+ u64 pfn;
+
+ if (pvh_start_info.magic != XEN_HVM_START_MAGIC_VALUE) {
+ xen_raw_printk("Error: Unexpected magic value (0x%08x)\n",
+ pvh_start_info.magic);
+ BUG();
+ }
+
+ xen_pvh = 1;
+
+ msr = cpuid_ebx(xen_cpuid_base() + 2);
+ pfn = __pa(hypercall_page);
+ wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+
+ init_pvh_bootparams();
+
+ x86_init.oem.arch_setup = xen_pvh_arch_setup;
+}
--
2.9.3
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