# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1182362965 -3600
# Node ID 706976fe8333a88c4d3482253927faa3b4714b15
# Parent 496e3157a35c32d7a550223914cfb92389a80874
linux/x86: Obtain EDD info from Xen
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
arch/i386/kernel/setup-xen.c | 3 +
arch/x86_64/kernel/setup-xen.c | 3 +
buildconfigs/linux-defconfig_xen0_x86_32 | 2 +
buildconfigs/linux-defconfig_xenU_x86_32 | 2 +
buildconfigs/linux-defconfig_xen_x86_32 | 2 +
drivers/firmware/Kconfig | 1
drivers/xen/core/Makefile | 2 -
drivers/xen/core/firmware.c | 56 +++++++++++++++++++++++++++++++
include/xen/firmware.h | 6 +++
include/xen/interface/platform.h | 32 +++++++++++++++++
10 files changed, 107 insertions(+), 2 deletions(-)
diff -r 496e3157a35c -r 706976fe8333 arch/i386/kernel/setup-xen.c
--- a/arch/i386/kernel/setup-xen.c Wed Jun 20 14:39:34 2007 +0100
+++ b/arch/i386/kernel/setup-xen.c Wed Jun 20 19:09:25 2007 +0100
@@ -66,6 +66,7 @@
#include <xen/interface/physdev.h>
#include <xen/interface/memory.h>
#include <xen/features.h>
+#include <xen/firmware.h>
#include <xen/xencons.h>
#include <setup_arch.h>
#include <bios_ebda.h>
@@ -740,6 +741,7 @@ struct edd edd;
#ifdef CONFIG_EDD_MODULE
EXPORT_SYMBOL(edd);
#endif
+#ifndef CONFIG_XEN
/**
* copy_edd() - Copy the BIOS EDD information
* from boot_params into a safe place.
@@ -752,6 +754,7 @@ static inline void copy_edd(void)
edd.mbr_signature_nr = EDD_MBR_SIG_NR;
edd.edd_info_nr = EDD_NR;
}
+#endif
#else
static inline void copy_edd(void)
{
diff -r 496e3157a35c -r 706976fe8333 arch/x86_64/kernel/setup-xen.c
--- a/arch/x86_64/kernel/setup-xen.c Wed Jun 20 14:39:34 2007 +0100
+++ b/arch/x86_64/kernel/setup-xen.c Wed Jun 20 19:09:25 2007 +0100
@@ -71,6 +71,7 @@
#include <asm/hypervisor.h>
#include <xen/interface/nmi.h>
#include <xen/features.h>
+#include <xen/firmware.h>
#include <xen/xencons.h>
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_PHYS(x) ((x) << PAGE_SHIFT)
@@ -534,6 +535,7 @@ struct edd edd;
#ifdef CONFIG_EDD_MODULE
EXPORT_SYMBOL(edd);
#endif
+#ifndef CONFIG_XEN
/**
* copy_edd() - Copy the BIOS EDD information
* from boot_params into a safe place.
@@ -546,6 +548,7 @@ static inline void copy_edd(void)
edd.mbr_signature_nr = EDD_MBR_SIG_NR;
edd.edd_info_nr = EDD_NR;
}
+#endif
#else
static inline void copy_edd(void)
{
diff -r 496e3157a35c -r 706976fe8333 buildconfigs/linux-defconfig_xen0_x86_32
--- a/buildconfigs/linux-defconfig_xen0_x86_32 Wed Jun 20 14:39:34 2007 +0100
+++ b/buildconfigs/linux-defconfig_xen0_x86_32 Wed Jun 20 19:09:25 2007 +0100
@@ -155,12 +155,14 @@ CONFIG_VM86=y
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
CONFIG_MICROCODE=y
+CONFIG_X86_MSR=y
CONFIG_X86_CPUID=y
CONFIG_SWIOTLB=y
#
# Firmware Drivers
#
+CONFIG_EDD=y
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
# CONFIG_NOHIGHMEM is not set
diff -r 496e3157a35c -r 706976fe8333 buildconfigs/linux-defconfig_xenU_x86_32
--- a/buildconfigs/linux-defconfig_xenU_x86_32 Wed Jun 20 14:39:34 2007 +0100
+++ b/buildconfigs/linux-defconfig_xenU_x86_32 Wed Jun 20 19:09:25 2007 +0100
@@ -152,12 +152,14 @@ CONFIG_VM86=y
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
+# CONFIG_X86_MSR is not set
CONFIG_X86_CPUID=y
CONFIG_SWIOTLB=y
#
# Firmware Drivers
#
+# CONFIG_EDD is not set
# CONFIG_DELL_RBU is not set
# CONFIG_DCDBAS is not set
# CONFIG_NOHIGHMEM is not set
diff -r 496e3157a35c -r 706976fe8333 buildconfigs/linux-defconfig_xen_x86_32
--- a/buildconfigs/linux-defconfig_xen_x86_32 Wed Jun 20 14:39:34 2007 +0100
+++ b/buildconfigs/linux-defconfig_xen_x86_32 Wed Jun 20 19:09:25 2007 +0100
@@ -160,12 +160,14 @@ CONFIG_VM86=y
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
CONFIG_MICROCODE=y
+CONFIG_X86_MSR=y
CONFIG_X86_CPUID=m
CONFIG_SWIOTLB=y
#
# Firmware Drivers
#
+CONFIG_EDD=y
CONFIG_DELL_RBU=m
CONFIG_DCDBAS=m
# CONFIG_NOHIGHMEM is not set
diff -r 496e3157a35c -r 706976fe8333 drivers/firmware/Kconfig
--- a/drivers/firmware/Kconfig Wed Jun 20 14:39:34 2007 +0100
+++ b/drivers/firmware/Kconfig Wed Jun 20 19:09:25 2007 +0100
@@ -8,7 +8,6 @@ config EDD
config EDD
tristate "BIOS Enhanced Disk Drive calls determine boot disk"
depends on !IA64
- depends on !XEN
help
Say Y or M here if you want to enable BIOS Enhanced Disk Drive
Services real mode BIOS calls to determine which disk
diff -r 496e3157a35c -r 706976fe8333 drivers/xen/core/Makefile
--- a/drivers/xen/core/Makefile Wed Jun 20 14:39:34 2007 +0100
+++ b/drivers/xen/core/Makefile Wed Jun 20 19:09:25 2007 +0100
@@ -2,7 +2,7 @@
# Makefile for the linux kernel.
#
-obj-y := evtchn.o gnttab.o features.o reboot.o machine_reboot.o
+obj-y := evtchn.o gnttab.o features.o reboot.o machine_reboot.o firmware.o
obj-$(CONFIG_PROC_FS) += xen_proc.o
obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor_sysfs.o
diff -r 496e3157a35c -r 706976fe8333 drivers/xen/core/firmware.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/xen/core/firmware.c Wed Jun 20 19:09:25 2007 +0100
@@ -0,0 +1,56 @@
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/edd.h>
+#include <xen/interface/platform.h>
+#include <asm/hypervisor.h>
+
+#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
+void __init copy_edd(void)
+{
+ int ret;
+ xen_platform_op_t op;
+
+ if (!is_initial_xendomain())
+ return;
+
+ op.cmd = XENPF_firmware_info;
+
+ for (op.u.firmware_info.index = 0, ret = 0;
+ ret != -ESRCH && ret != -ENOSYS && edd.edd_info_nr < EDDMAXNR;
+ ++op.u.firmware_info.index) {
+ struct edd_info *info = edd.edd_info + edd.edd_info_nr;
+
+ op.u.firmware_info.type = XEN_FW_DISK_INFO;
+ info->params.length = sizeof(info->params);
+ set_xen_guest_handle(op.u.firmware_info.u.disk_info.edd_params,
+ &info->params);
+ ret = HYPERVISOR_platform_op(&op);
+ if (ret)
+ continue;
+
+#define C(x) info->x = op.u.firmware_info.u.disk_info.x
+ C(device);
+ C(version);
+ C(interface_support);
+ C(legacy_max_cylinder);
+ C(legacy_max_head);
+ C(legacy_sectors_per_track);
+#undef C
+
+ ++edd.edd_info_nr;
+ }
+
+ op.u.firmware_info.type = XEN_FW_DISK_MBR_SIGNATURE;
+ for (op.u.firmware_info.index = 0, ret = 0;
+ (ret != -ESRCH && ret != -ENOSYS &&
+ edd.mbr_signature_nr < EDD_MBR_SIG_MAX);
+ ++op.u.firmware_info.index) {
+ ret = HYPERVISOR_platform_op(&op);
+ if (ret)
+ continue;
+ edd.mbr_signature[edd.mbr_signature_nr++] =
+ op.u.firmware_info.u.disk_mbr_signature.mbr_signature;
+ }
+}
+#endif
diff -r 496e3157a35c -r 706976fe8333 include/xen/firmware.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/xen/firmware.h Wed Jun 20 19:09:25 2007 +0100
@@ -0,0 +1,6 @@
+#ifndef __XEN_FIRMWARE_H__
+#define __XEN_FIRMWARE_H__
+
+void copy_edd(void);
+
+#endif /* __XEN_FIRMWARE_H__ */
diff -r 496e3157a35c -r 706976fe8333 include/xen/interface/platform.h
--- a/include/xen/interface/platform.h Wed Jun 20 14:39:34 2007 +0100
+++ b/include/xen/interface/platform.h Wed Jun 20 19:09:25 2007 +0100
@@ -114,6 +114,37 @@ typedef struct xenpf_platform_quirk xenp
typedef struct xenpf_platform_quirk xenpf_platform_quirk_t;
DEFINE_XEN_GUEST_HANDLE(xenpf_platform_quirk_t);
+#define XENPF_firmware_info 50
+#define XEN_FW_DISK_INFO 1
+#define XEN_FW_DISK_MBR_SIGNATURE 2
+struct xenpf_firmware_info {
+ /* IN variables. */
+ uint32_t type;
+ uint32_t index;
+ /* OUT variables. */
+ union {
+ struct {
+ /* Int13, Fn48: Check Extensions Present. */
+ uint8_t device; /* %dl: bios device number */
+ uint8_t version; /* %ah: major version */
+ uint16_t interface_support; /* %cx: support bitmap */
+ /* Int13, Fn08: Legacy Get Device Parameters. */
+ uint16_t legacy_max_cylinder; /* %cl[7:6]:%ch: max cyl # */
+ uint8_t legacy_max_head; /* %dh: max head # */
+ uint8_t legacy_sectors_per_track; /* %cl[5:0]: max sector # */
+ /* Int13, Fn41: Get Device Parameters (as filled into %ds:%esi). */
+ /* NB. First uint16_t of buffer must be set to buffer size. */
+ XEN_GUEST_HANDLE(void) edd_params;
+ } disk_info; /* XEN_FW_DISK_INFO */
+ struct {
+ uint8_t device; /* bios device number */
+ uint32_t mbr_signature; /* offset 0x1b8 in mbr */
+ } disk_mbr_signature; /* XEN_FW_DISK_MBR_SIGNATURE */
+ } u;
+};
+typedef struct xenpf_firmware_info xenpf_firmware_info_t;
+DEFINE_XEN_GUEST_HANDLE(xenpf_firmware_info_t);
+
struct xen_platform_op {
uint32_t cmd;
uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
@@ -124,6 +155,7 @@ struct xen_platform_op {
struct xenpf_read_memtype read_memtype;
struct xenpf_microcode_update microcode;
struct xenpf_platform_quirk platform_quirk;
+ struct xenpf_firmware_info firmware_info;
uint8_t pad[128];
} u;
};
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