thr3ads.net - Fedora xen - [Fedora-xen] [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64 [Jul 2006]

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Aron Griffis

2006-Jul-27 04:10 UTC

[Fedora-xen] [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

Hi Juan,

These patches are the result of Akio, Prarit, Alex and me working on fixing the
ia64 build of your tree.  At this point the bare-metal Linux kernel builds and
boots.  The xen kernel builds but doesn''t complete booting. 
Nonetheless, since
these patches seem to take us most of the way there, we''d like to
request them
to be applied to your tree.

Thanks,
Aron

12 files changed, 684 insertions(+), 18 deletions(-)
arch/ia64/kernel/gate.S         |  376 +++++++++++++++++++++++++++++++++++++++
arch/ia64/kernel/gate.lds.S     |   96 +++++++++
arch/ia64/kernel/patch.c        |  197 ++++++++++++++++++++
arch/ia64/mm/ioremap.c          |    2 
arch/ia64/xen/hypervisor.c      |    4 
drivers/xen/blkback/blkback.c   |    1 
drivers/xen/core/evtchn.c       |    2 
drivers/xen/netback/common.h    |    1 
drivers/xen/netback/netback.c   |    1 
drivers/xen/netfront/netfront.c |    1 
include/asm-ia64/hw_irq.h       |    5 
include/asm-ia64/io.h           |   16 -

Aron Griffis

2006-Jul-27 04:10 UTC

head link

[Fedora-xen] [PATCH 1 of 5] Add files which went lost in a merge goof

3 files changed, 669 insertions(+)
arch/ia64/kernel/gate.S     |  376 +++++++++++++++++++++++++++++++++++++++++++
arch/ia64/kernel/gate.lds.S |   96 ++++++++++
arch/ia64/kernel/patch.c    |  197 ++++++++++++++++++++++


# HG changeset patch
# User agriffis@cheo.zko.hp.com
# Node ID 489de0be169cc96a41105f8cb9046be740a9a706
# Parent  61b9455653982d901cac92052c30099eeffddd39
Add files which went lost in a merge goof

Signed-off-by: Aron Griffis <aron@hp.com>

diff -r 61b945565398 -r 489de0be169c arch/ia64/kernel/gate.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/ia64/kernel/gate.S	Thu Jul 27 00:09:52 2006 -0400
@@ -0,0 +1,376 @@
+/*
+ * This file contains the code that gets mapped at the upper end of each
task''s text
+ * region.  For now, it contains the signal trampoline code only.
+ *
+ * Copyright (C) 1999-2003 Hewlett-Packard Co
+ * 	David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#include <linux/config.h>
+
+#include <asm/asmmacro.h>
+#include <asm/errno.h>
+#include <asm/asm-offsets.h>
+#include <asm/sigcontext.h>
+#include <asm/system.h>
+#include <asm/unistd.h>
+
+/*
+ * We can''t easily refer to symbols inside the kernel.  To avoid full
runtime relocation,
+ * complications with the linker (which likes to create PLT stubs for branches
+ * to targets outside the shared object) and to avoid multi-phase kernel
builds, we
+ * simply create minimalistic "patch lists" in special ELF sections.
+ */
+	.section ".data.patch.fsyscall_table", "a"
+	.previous
+#define LOAD_FSYSCALL_TABLE(reg)			\
+[1:]	movl reg=0;					\
+	.xdata4 ".data.patch.fsyscall_table", 1b-.
+
+	.section ".data.patch.brl_fsys_bubble_down", "a"
+	.previous
+#define BRL_COND_FSYS_BUBBLE_DOWN(pr)			\
+[1:](pr)brl.cond.sptk 0;				\
+	.xdata4 ".data.patch.brl_fsys_bubble_down", 1b-.
+
+GLOBAL_ENTRY(__kernel_syscall_via_break)
+	.prologue
+	.altrp b6
+	.body
+	/*
+	 * Note: for (fast) syscall restart to work, the break instruction must be
+	 *	 the first one in the bundle addressed by syscall_via_break.
+	 */
+{ .mib
+	break 0x100000
+	nop.i 0
+	br.ret.sptk.many b6
+}
+END(__kernel_syscall_via_break)
+
+/*
+ * On entry:
+ *	r11 = saved ar.pfs
+ *	r15 = system call #
+ *	b0  = saved return address
+ *	b6  = return address
+ * On exit:
+ *	r11 = saved ar.pfs
+ *	r15 = system call #
+ *	b0  = saved return address
+ *	all other "scratch" registers:	undefined
+ *	all "preserved" registers:	same as on entry
+ */
+
+GLOBAL_ENTRY(__kernel_syscall_via_epc)
+	.prologue
+	.altrp b6
+	.body
+{
+	/*
+	 * Note: the kernel cannot assume that the first two instructions in this
+	 * bundle get executed.  The remaining code must be safe even if
+	 * they do not get executed.
+	 */
+	adds r17=-1024,r15			// A
+	mov r10=0				// A    default to successful syscall execution
+	epc					// B	causes split-issue
+}
+	;;
+	rsm psr.be | psr.i			// M2 (5 cyc to srlz.d)
+	LOAD_FSYSCALL_TABLE(r14)		// X
+	;;
+	mov r16=IA64_KR(CURRENT)		// M2 (12 cyc)
+	shladd r18=r17,3,r14			// A
+	mov r19=NR_syscalls-1			// A
+	;;
+	lfetch [r18]				// M0|1
+	mov r29=psr				// M2 (12 cyc)
+	// If r17 is a NaT, p6 will be zero
+	cmp.geu p6,p7=r19,r17			// A    (sysnr > 0 && sysnr <
1024+NR_syscalls)?
+	;;
+	mov r21=ar.fpsr				// M2 (12 cyc)
+	tnat.nz p10,p9=r15			// I0
+	mov.i r26=ar.pfs			// I0 (would stall anyhow due to srlz.d...)
+	;;
+	srlz.d					// M0 (forces split-issue) ensure PSR.BE==0
+(p6)	ld8 r18=[r18]				// M0|1
+	nop.i 0
+	;;
+	nop.m 0
+(p6)	tbit.z.unc p8,p0=r18,0			// I0 (dual-issues with "mov b7=r18"!)
+	nop.i 0
+	;;
+(p8)	ssm psr.i
+(p6)	mov b7=r18				// I0
+(p8)	br.dptk.many b7				// B
+
+	mov r27=ar.rsc				// M2 (12 cyc)
+/*
+ * brl.cond doesn''t work as intended because the linker would convert
this branch
+ * into a branch to a PLT.  Perhaps there will be a way to avoid this with some
+ * future version of the linker.  In the meantime, we just use an indirect
branch
+ * instead.
+ */
+#ifdef CONFIG_ITANIUM
+(p6)	add r14=-8,r14				// r14 <- addr of fsys_bubble_down entry
+	;;
+(p6)	ld8 r14=[r14]				// r14 <- fsys_bubble_down
+	;;
+(p6)	mov b7=r14
+(p6)	br.sptk.many b7
+#else
+	BRL_COND_FSYS_BUBBLE_DOWN(p6)
+#endif
+	ssm psr.i
+	mov r10=-1
+(p10)	mov r8=EINVAL
+(p9)	mov r8=ENOSYS
+	FSYS_RETURN
+END(__kernel_syscall_via_epc)
+
+#	define ARG0_OFF		(16 + IA64_SIGFRAME_ARG0_OFFSET)
+#	define ARG1_OFF		(16 + IA64_SIGFRAME_ARG1_OFFSET)
+#	define ARG2_OFF		(16 + IA64_SIGFRAME_ARG2_OFFSET)
+#	define SIGHANDLER_OFF	(16 + IA64_SIGFRAME_HANDLER_OFFSET)
+#	define SIGCONTEXT_OFF	(16 + IA64_SIGFRAME_SIGCONTEXT_OFFSET)
+
+#	define FLAGS_OFF	IA64_SIGCONTEXT_FLAGS_OFFSET
+#	define CFM_OFF		IA64_SIGCONTEXT_CFM_OFFSET
+#	define FR6_OFF		IA64_SIGCONTEXT_FR6_OFFSET
+#	define BSP_OFF		IA64_SIGCONTEXT_AR_BSP_OFFSET
+#	define RNAT_OFF		IA64_SIGCONTEXT_AR_RNAT_OFFSET
+#	define UNAT_OFF		IA64_SIGCONTEXT_AR_UNAT_OFFSET
+#	define FPSR_OFF		IA64_SIGCONTEXT_AR_FPSR_OFFSET
+#	define PR_OFF		IA64_SIGCONTEXT_PR_OFFSET
+#	define RP_OFF		IA64_SIGCONTEXT_IP_OFFSET
+#	define SP_OFF		IA64_SIGCONTEXT_R12_OFFSET
+#	define RBS_BASE_OFF	IA64_SIGCONTEXT_RBS_BASE_OFFSET
+#	define LOADRS_OFF	IA64_SIGCONTEXT_LOADRS_OFFSET
+#	define base0		r2
+#	define base1		r3
+	/*
+	 * When we get here, the memory stack looks like this:
+	 *
+	 *   +===============================+
+       	 *   |				     |
+       	 *   //	    struct sigframe          //
+       	 *   |				     |
+	 *   +-------------------------------+ <-- sp+16
+	 *   |      16 byte of scratch       |
+	 *   |            space              |
+	 *   +-------------------------------+ <-- sp
+	 *
+	 * The register stack looks _exactly_ the way it looked at the time the signal
+	 * occurred.  In other words, we''re treading on a potential
mine-field: each
+	 * incoming general register may be a NaT value (including sp, in which case
the
+	 * process ends up dying with a SIGSEGV).
+	 *
+	 * The first thing need to do is a cover to get the registers onto the backing
+	 * store.  Once that is done, we invoke the signal handler which may modify
some
+	 * of the machine state.  After returning from the signal handler, we return
+	 * control to the previous context by executing a sigreturn system call.  A
signal
+	 * handler may call the rt_sigreturn() function to directly return to a given
+	 * sigcontext.  However, the user-level sigreturn() needs to do much more than
+	 * calling the rt_sigreturn() system call as it needs to unwind the stack to
+	 * restore preserved registers that may have been saved on the signal
handler''s
+	 * call stack.
+	 */
+
+#define SIGTRAMP_SAVES										\
+	.unwabi 3, ''s'';		/* mark this as a sigtramp handler (saves
scratch regs) */	\
+	.unwabi @svr4, ''s''; /* backwards compatibility with old
unwinders (remove in v2.7) */	\
+	.savesp ar.unat, UNAT_OFF+SIGCONTEXT_OFF;						\
+	.savesp ar.fpsr, FPSR_OFF+SIGCONTEXT_OFF;						\
+	.savesp pr, PR_OFF+SIGCONTEXT_OFF;     							\
+	.savesp rp, RP_OFF+SIGCONTEXT_OFF;							\
+	.savesp ar.pfs, CFM_OFF+SIGCONTEXT_OFF;							\
+	.vframesp SP_OFF+SIGCONTEXT_OFF
+
+GLOBAL_ENTRY(__kernel_sigtramp)
+	// describe the state that is active when we get here:
+	.prologue
+	SIGTRAMP_SAVES
+	.body
+
+	.label_state 1
+
+	adds base0=SIGHANDLER_OFF,sp
+	adds base1=RBS_BASE_OFF+SIGCONTEXT_OFF,sp
+	br.call.sptk.many rp=1f
+1:
+	ld8 r17=[base0],(ARG0_OFF-SIGHANDLER_OFF)	// get pointer to signal
handler''s plabel
+	ld8 r15=[base1]					// get address of new RBS base (or NULL)
+	cover				// push args in interrupted frame onto backing store
+	;;
+	cmp.ne p1,p0=r15,r0		// do we need to switch rbs? (note: pr is saved by
kernel)
+	mov.m r9=ar.bsp			// fetch ar.bsp
+	.spillsp.p p1, ar.rnat, RNAT_OFF+SIGCONTEXT_OFF
+(p1)	br.cond.spnt setup_rbs		// yup -> (clobbers p8, r14-r16, and r18-r20)
+back_from_setup_rbs:
+	alloc r8=ar.pfs,0,0,3,0
+	ld8 out0=[base0],16		// load arg0 (signum)
+	adds base1=(ARG1_OFF-(RBS_BASE_OFF+SIGCONTEXT_OFF)),base1
+	;;
+	ld8 out1=[base1]		// load arg1 (siginfop)
+	ld8 r10=[r17],8			// get signal handler entry point
+	;;
+	ld8 out2=[base0]		// load arg2 (sigcontextp)
+	ld8 gp=[r17]			// get signal handler''s global pointer
+	adds base0=(BSP_OFF+SIGCONTEXT_OFF),sp
+	;;
+	.spillsp ar.bsp, BSP_OFF+SIGCONTEXT_OFF
+	st8 [base0]=r9			// save sc_ar_bsp
+	adds base0=(FR6_OFF+SIGCONTEXT_OFF),sp
+	adds base1=(FR6_OFF+16+SIGCONTEXT_OFF),sp
+	;;
+	stf.spill [base0]=f6,32
+	stf.spill [base1]=f7,32
+	;;
+	stf.spill [base0]=f8,32
+	stf.spill [base1]=f9,32
+	mov b6=r10
+	;;
+	stf.spill [base0]=f10,32
+	stf.spill [base1]=f11,32
+	;;
+	stf.spill [base0]=f12,32
+	stf.spill [base1]=f13,32
+	;;
+	stf.spill [base0]=f14,32
+	stf.spill [base1]=f15,32
+	br.call.sptk.many rp=b6			// call the signal handler
+.ret0:	adds base0=(BSP_OFF+SIGCONTEXT_OFF),sp
+	;;
+	ld8 r15=[base0]				// fetch sc_ar_bsp
+	mov r14=ar.bsp
+	;;
+	cmp.ne p1,p0=r14,r15			// do we need to restore the rbs?
+(p1)	br.cond.spnt restore_rbs		// yup -> (clobbers r14-r18, f6 & f7)
+	;;
+back_from_restore_rbs:
+	adds base0=(FR6_OFF+SIGCONTEXT_OFF),sp
+	adds base1=(FR6_OFF+16+SIGCONTEXT_OFF),sp
+	;;
+	ldf.fill f6=[base0],32
+	ldf.fill f7=[base1],32
+	;;
+	ldf.fill f8=[base0],32
+	ldf.fill f9=[base1],32
+	;;
+	ldf.fill f10=[base0],32
+	ldf.fill f11=[base1],32
+	;;
+	ldf.fill f12=[base0],32
+	ldf.fill f13=[base1],32
+	;;
+	ldf.fill f14=[base0],32
+	ldf.fill f15=[base1],32
+	mov r15=__NR_rt_sigreturn
+	.restore sp				// pop .prologue
+	break __BREAK_SYSCALL
+
+	.prologue
+	SIGTRAMP_SAVES
+setup_rbs:
+	mov ar.rsc=0				// put RSE into enforced lazy mode
+	;;
+	.save ar.rnat, r19
+	mov r19=ar.rnat				// save RNaT before switching backing store area
+	adds r14=(RNAT_OFF+SIGCONTEXT_OFF),sp
+
+	mov r18=ar.bspstore
+	mov ar.bspstore=r15			// switch over to new register backing store area
+	;;
+
+	.spillsp ar.rnat, RNAT_OFF+SIGCONTEXT_OFF
+	st8 [r14]=r19				// save sc_ar_rnat
+	.body
+	mov.m r16=ar.bsp			// sc_loadrs <- (new bsp - new bspstore) << 16
+	adds r14=(LOADRS_OFF+SIGCONTEXT_OFF),sp
+	;;
+	invala
+	sub r15=r16,r15
+	extr.u r20=r18,3,6
+	;;
+	mov ar.rsc=0xf				// set RSE into eager mode, pl 3
+	cmp.eq p8,p0=63,r20
+	shl r15=r15,16
+	;;
+	st8 [r14]=r15				// save sc_loadrs
+(p8)	st8 [r18]=r19		// if bspstore points at RNaT slot, store RNaT there now
+	.restore sp				// pop .prologue
+	br.cond.sptk back_from_setup_rbs
+
+	.prologue
+	SIGTRAMP_SAVES
+	.spillsp ar.rnat, RNAT_OFF+SIGCONTEXT_OFF
+	.body
+restore_rbs:
+	// On input:
+	//	r14 = bsp1 (bsp at the time of return from signal handler)
+	//	r15 = bsp0 (bsp at the time the signal occurred)
+	//
+	// Here, we need to calculate bspstore0, the value that ar.bspstore needs
+	// to be set to, based on bsp0 and the size of the dirty partition on
+	// the alternate stack (sc_loadrs >> 16).  This can be done with the
+	// following algorithm:
+	//
+	//  bspstore0 = rse_skip_regs(bsp0, -rse_num_regs(bsp1 - (loadrs >> 19),
bsp1));
+	//
+	// This is what the code below does.
+	//
+	alloc r2=ar.pfs,0,0,0,0			// alloc null frame
+	adds r16=(LOADRS_OFF+SIGCONTEXT_OFF),sp
+	adds r18=(RNAT_OFF+SIGCONTEXT_OFF),sp
+	;;
+	ld8 r17=[r16]
+	ld8 r16=[r18]			// get new rnat
+	extr.u r18=r15,3,6	// r18 <- rse_slot_num(bsp0)
+	;;
+	mov ar.rsc=r17			// put RSE into enforced lazy mode
+	shr.u r17=r17,16
+	;;
+	sub r14=r14,r17		// r14 (bspstore1) <- bsp1 - (sc_loadrs >> 16)
+	shr.u r17=r17,3		// r17 <- (sc_loadrs >> 19)
+	;;
+	loadrs			// restore dirty partition
+	extr.u r14=r14,3,6	// r14 <- rse_slot_num(bspstore1)
+	;;
+	add r14=r14,r17		// r14 <- rse_slot_num(bspstore1) + (sc_loadrs >>
19)
+	;;
+	shr.u r14=r14,6		// r14 <- (rse_slot_num(bspstore1) + (sc_loadrs >>
19))/0x40
+	;;
+	sub r14=r14,r17		// r14 <- -rse_num_regs(bspstore1, bsp1)
+	movl r17=0x8208208208208209
+	;;
+	add r18=r18,r14		// r18 (delta) <- rse_slot_num(bsp0) -
rse_num_regs(bspstore1,bsp1)
+	setf.sig f7=r17
+	cmp.lt p7,p0=r14,r0	// p7 <- (r14 < 0)?
+	;;
+(p7)	adds r18=-62,r18	// delta -= 62
+	;;
+	setf.sig f6=r18
+	;;
+	xmpy.h f6=f6,f7
+	;;
+	getf.sig r17=f6
+	;;
+	add r17=r17,r18
+	shr r18=r18,63
+	;;
+	shr r17=r17,5
+	;;
+	sub r17=r17,r18		// r17 = delta/63
+	;;
+	add r17=r14,r17		// r17 <- delta/63 - rse_num_regs(bspstore1, bsp1)
+	;;
+	shladd r15=r17,3,r15	// r15 <- bsp0 + 8*(delta/63 - rse_num_regs(bspstore1,
bsp1))
+	;;
+	mov ar.bspstore=r15			// switch back to old register backing store area
+	;;
+	mov ar.rnat=r16				// restore RNaT
+	mov ar.rsc=0xf				// (will be restored later on from sc_ar_rsc)
+	// invala not necessary as that will happen when returning to user-mode
+	br.cond.sptk back_from_restore_rbs
+END(__kernel_sigtramp)
diff -r 61b945565398 -r 489de0be169c arch/ia64/kernel/gate.lds.S
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/ia64/kernel/gate.lds.S	Thu Jul 27 00:09:52 2006 -0400
@@ -0,0 +1,96 @@
+/*
+ * Linker script for gate DSO.  The gate pages are an ELF shared object
prelinked to its
+ * virtual address, with only one read-only segment and one execute-only
segment (both fit
+ * in one page).  This script controls its layout.
+ */
+
+#include <linux/config.h>
+
+#include <asm/system.h>
+
+SECTIONS
+{
+  . = GATE_ADDR + SIZEOF_HEADERS;
+
+  .hash				: { *(.hash) }				:readable
+  .dynsym			: { *(.dynsym) }
+  .dynstr			: { *(.dynstr) }
+  .gnu.version			: { *(.gnu.version) }
+  .gnu.version_d		: { *(.gnu.version_d) }
+  .gnu.version_r		: { *(.gnu.version_r) }
+  .dynamic			: { *(.dynamic) }			:readable :dynamic
+
+  /*
+   * This linker script is used both with -r and with -shared.  For the layouts
to match,
+   * we need to skip more than enough space for the dynamic symbol table et al.
If this
+   * amount is insufficient, ld -shared will barf.  Just increase it here.
+   */
+  . = GATE_ADDR + 0x500;
+
+  .data.patch			: {
+				    __start_gate_mckinley_e9_patchlist = .;
+				    *(.data.patch.mckinley_e9)
+				    __end_gate_mckinley_e9_patchlist = .;
+
+				    __start_gate_vtop_patchlist = .;
+				    *(.data.patch.vtop)
+				    __end_gate_vtop_patchlist = .;
+
+				    __start_gate_fsyscall_patchlist = .;
+				    *(.data.patch.fsyscall_table)
+				    __end_gate_fsyscall_patchlist = .;
+
+				    __start_gate_brl_fsys_bubble_down_patchlist = .;
+				    *(.data.patch.brl_fsys_bubble_down)
+				    __end_gate_brl_fsys_bubble_down_patchlist = .;
+  }									:readable
+  .IA_64.unwind_info		: { *(.IA_64.unwind_info*) }
+  .IA_64.unwind			: { *(.IA_64.unwind*) }			:readable :unwind
+#ifdef HAVE_BUGGY_SEGREL
+  .text (GATE_ADDR + PAGE_SIZE)	: { *(.text) *(.text.*) }		:readable
+#else
+  . = ALIGN (PERCPU_PAGE_SIZE) + (. & (PERCPU_PAGE_SIZE - 1));
+  .text				: { *(.text) *(.text.*) }		:epc
+#endif
+
+  /DISCARD/			: {
+  	*(.got.plt) *(.got)
+	*(.data .data.* .gnu.linkonce.d.*)
+	*(.dynbss)
+	*(.bss .bss.* .gnu.linkonce.b.*)
+	*(__ex_table)
+	*(__mca_table)
+  }
+}
+
+/*
+ * We must supply the ELF program headers explicitly to get just one
+ * PT_LOAD segment, and set the flags explicitly to make segments read-only.
+ */
+PHDRS
+{
+  readable  PT_LOAD	FILEHDR	PHDRS	FLAGS(4);	/* PF_R */
+#ifndef HAVE_BUGGY_SEGREL
+  epc	    PT_LOAD	FILEHDR PHDRS	FLAGS(1);	/* PF_X */
+#endif
+  dynamic   PT_DYNAMIC			FLAGS(4);	/* PF_R */
+  unwind    0x70000001; /* PT_IA_64_UNWIND, but ld doesn''t match the
name */
+}
+
+/*
+ * This controls what symbols we export from the DSO.
+ */
+VERSION
+{
+  LINUX_2.5 {
+    global:
+	__kernel_syscall_via_break;
+	__kernel_syscall_via_epc;
+	__kernel_sigtramp;
+
+    local: *;
+  };
+}
+
+/* The ELF entry point can be used to set the AT_SYSINFO value.  */
+ENTRY(__kernel_syscall_via_epc)
diff -r 61b945565398 -r 489de0be169c arch/ia64/kernel/patch.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/arch/ia64/kernel/patch.c	Thu Jul 27 00:09:52 2006 -0400
@@ -0,0 +1,197 @@
+/*
+ * Instruction-patching support.
+ *
+ * Copyright (C) 2003 Hewlett-Packard Co
+ *	David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#include <linux/init.h>
+#include <linux/string.h>
+
+#include <asm/patch.h>
+#include <asm/processor.h>
+#include <asm/sections.h>
+#include <asm/system.h>
+#include <asm/unistd.h>
+
+/*
+ * This was adapted from code written by Tony Luck:
+ *
+ * The 64-bit value in a "movl reg=value" is scattered between the
two words of the bundle
+ * like this:
+ *
+ * 6  6         5         4         3         2         1
+ * 3210987654321098765432109876543210987654321098765432109876543210
+ * ABBBBBBBBBBBBBBBBBBBBBBBCCCCCCCCCCCCCCCCCCDEEEEEFFFFFFFFFGGGGGGG
+ *
+ * CCCCCCCCCCCCCCCCCCxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+ * xxxxAFFFFFFFFFEEEEEDxGGGGGGGxxxxxxxxxxxxxBBBBBBBBBBBBBBBBBBBBBBB
+ */
+static u64
+get_imm64 (u64 insn_addr)
+{
+	u64 *p = (u64 *) (insn_addr & -16);	/* mask out slot number */
+
+	return ( (p[1] & 0x0800000000000000UL) << 4)  | /*A*/
+		((p[1] & 0x00000000007fffffUL) << 40) | /*B*/
+		((p[0] & 0xffffc00000000000UL) >> 24) | /*C*/
+		((p[1] & 0x0000100000000000UL) >> 23) | /*D*/
+		((p[1] & 0x0003e00000000000UL) >> 29) | /*E*/
+		((p[1] & 0x07fc000000000000UL) >> 43) | /*F*/
+		((p[1] & 0x000007f000000000UL) >> 36);  /*G*/
+}
+
+/* Patch instruction with "val" where "mask" has 1 bits. */
+void
+ia64_patch (u64 insn_addr, u64 mask, u64 val)
+{
+	u64 m0, m1, v0, v1, b0, b1, *b = (u64 *) (insn_addr & -16);
+#	define insn_mask ((1UL << 41) - 1)
+	unsigned long shift;
+
+	b0 = b[0]; b1 = b[1];
+	shift = 5 + 41 * (insn_addr % 16); /* 5 bits of template, then 3 x 41-bit
instructions */
+	if (shift >= 64) {
+		m1 = mask << (shift - 64);
+		v1 = val << (shift - 64);
+	} else {
+		m0 = mask << shift; m1 = mask >> (64 - shift);
+		v0 = val  << shift; v1 = val >> (64 - shift);
+		b[0] = (b0 & ~m0) | (v0 & m0);
+	}
+	b[1] = (b1 & ~m1) | (v1 & m1);
+}
+
+void
+ia64_patch_imm64 (u64 insn_addr, u64 val)
+{
+	/* The assembler may generate offset pointing to either slot 1
+	   or slot 2 for a long (2-slot) instruction, occupying slots 1
+	   and 2.  */
+  	insn_addr &= -16UL;
+	ia64_patch(insn_addr + 2,
+		   0x01fffefe000UL, (  ((val & 0x8000000000000000UL) >> 27) /* bit
63 -> 36 */
+				     | ((val & 0x0000000000200000UL) <<  0) /* bit 21 -> 21 */
+				     | ((val & 0x00000000001f0000UL) <<  6) /* bit 16 -> 22 */
+				     | ((val & 0x000000000000ff80UL) << 20) /* bit  7 -> 27 */
+				     | ((val & 0x000000000000007fUL) << 13) /* bit  0 -> 13
*/));
+	ia64_patch(insn_addr + 1, 0x1ffffffffffUL, val >> 22);
+}
+
+void
+ia64_patch_imm60 (u64 insn_addr, u64 val)
+{
+	/* The assembler may generate offset pointing to either slot 1
+	   or slot 2 for a long (2-slot) instruction, occupying slots 1
+	   and 2.  */
+  	insn_addr &= -16UL;
+	ia64_patch(insn_addr + 2,
+		   0x011ffffe000UL, (  ((val & 0x0800000000000000UL) >> 23) /* bit
59 -> 36 */
+				     | ((val & 0x00000000000fffffUL) << 13) /* bit  0 -> 13
*/));
+	ia64_patch(insn_addr + 1, 0x1fffffffffcUL, val >> 18);
+}
+
+/*
+ * We need sometimes to load the physical address of a kernel
+ * object.  Often we can convert the virtual address to physical
+ * at execution time, but sometimes (either for performance reasons
+ * or during error recovery) we cannot to this.  Patch the marked
+ * bundles to load the physical address.
+ */
+void __init
+ia64_patch_vtop (unsigned long start, unsigned long end)
+{
+	s32 *offp = (s32 *) start;
+	u64 ip;
+
+	while (offp < (s32 *) end) {
+		ip = (u64) offp + *offp;
+
+		/* replace virtual address with corresponding physical address: */
+		ia64_patch_imm64(ip, ia64_tpa(get_imm64(ip)));
+		ia64_fc((void *) ip);
+		++offp;
+	}
+	ia64_sync_i();
+	ia64_srlz_i();
+}
+
+void __init
+ia64_patch_mckinley_e9 (unsigned long start, unsigned long end)
+{
+	static int first_time = 1;
+	int need_workaround;
+	s32 *offp = (s32 *) start;
+	u64 *wp;
+
+	need_workaround = (local_cpu_data->family == 0x1f &&
local_cpu_data->model == 0);
+
+	if (first_time) {
+		first_time = 0;
+		if (need_workaround)
+			printk(KERN_INFO "Leaving McKinley Errata 9 workaround
enabled\n");
+		else
+			printk(KERN_INFO "McKinley Errata 9 workaround not needed; "
+			       "disabling it\n");
+	}
+	if (need_workaround)
+		return;
+
+	while (offp < (s32 *) end) {
+		wp = (u64 *) ia64_imva((char *) offp + *offp);
+		wp[0] = 0x0000000100000000UL; /* nop.m 0; nop.i 0; nop.i 0 */
+		wp[1] = 0x0004000000000200UL;
+		wp[2] = 0x0000000100000011UL; /* nop.m 0; nop.i 0; br.ret.sptk.many b6 */
+		wp[3] = 0x0084006880000200UL;
+		ia64_fc(wp); ia64_fc(wp + 2);
+		++offp;
+	}
+	ia64_sync_i();
+	ia64_srlz_i();
+}
+
+static void __init
+patch_fsyscall_table (unsigned long start, unsigned long end)
+{
+	extern unsigned long fsyscall_table[NR_syscalls];
+	s32 *offp = (s32 *) start;
+	u64 ip;
+
+	while (offp < (s32 *) end) {
+		ip = (u64) ia64_imva((char *) offp + *offp);
+		ia64_patch_imm64(ip, (u64) fsyscall_table);
+		ia64_fc((void *) ip);
+		++offp;
+	}
+	ia64_sync_i();
+	ia64_srlz_i();
+}
+
+static void __init
+patch_brl_fsys_bubble_down (unsigned long start, unsigned long end)
+{
+	extern char fsys_bubble_down[];
+	s32 *offp = (s32 *) start;
+	u64 ip;
+
+	while (offp < (s32 *) end) {
+		ip = (u64) offp + *offp;
+		ia64_patch_imm60((u64) ia64_imva((void *) ip),
+				 (u64) (fsys_bubble_down - (ip & -16)) / 16);
+		ia64_fc((void *) ip);
+		++offp;
+	}
+	ia64_sync_i();
+	ia64_srlz_i();
+}
+
+void __init
+ia64_patch_gate (void)
+{
+#	define START(name)	((unsigned long) __start_gate_##name##_patchlist)
+#	define END(name)	((unsigned long)__end_gate_##name##_patchlist)
+
+	patch_fsyscall_table(START(fsyscall), END(fsyscall));
+	patch_brl_fsys_bubble_down(START(brl_fsys_bubble_down),
END(brl_fsys_bubble_down));
+	ia64_patch_vtop(START(vtop), END(vtop));
+	ia64_patch_mckinley_e9(START(mckinley_e9), END(mckinley_e9));
+}

Aron Griffis

2006-Jul-27 04:10 UTC

head link

[Fedora-xen] [PATCH 2 of 5] Port xen ioremap mods forward to 2.6.18-rc2

2 files changed, 4 insertions(+), 14 deletions(-)
arch/ia64/mm/ioremap.c |    2 ++
include/asm-ia64/io.h  |   16 ++--------------


# HG changeset patch
# User agriffis@cheo.zko.hp.com
# Node ID 575b49ce64a2098515c48a3f29a214f853025fcf
# Parent  489de0be169cc96a41105f8cb9046be740a9a706
Port xen ioremap mods forward to 2.6.18-rc2

Signed-off-by: Aron Griffis <aron@hp.com>

diff -r 489de0be169c -r 575b49ce64a2 arch/ia64/mm/ioremap.c
--- a/arch/ia64/mm/ioremap.c	Thu Jul 27 00:09:52 2006 -0400
+++ b/arch/ia64/mm/ioremap.c	Thu Jul 27 00:09:55 2006 -0400
@@ -16,7 +16,9 @@ static inline void __iomem *
 static inline void __iomem *
 __ioremap (unsigned long offset, unsigned long size)
 {
+#ifdef CONFIG_XEN
 	offset = HYPERVISOR_ioremap(offset, size);
+#endif
 	return (void __iomem *) (__IA64_UNCACHED_OFFSET | offset);
 }
 
diff -r 489de0be169c -r 575b49ce64a2 include/asm-ia64/io.h
--- a/include/asm-ia64/io.h	Thu Jul 27 00:09:52 2006 -0400
+++ b/include/asm-ia64/io.h	Thu Jul 27 00:09:55 2006 -0400
@@ -451,25 +451,13 @@ __writeq (unsigned long val, volatile vo
 # define outl_p		outl
 #endif
 
-/*
- * An "address" in IO memory space is not clearly either an integer
or a pointer. We will
- * accept both, thus the casts.
- *
- * On ia-64, we access the physical I/O memory space through the uncached
kernel region.
- */
-static inline void __iomem *
-ioremap (unsigned long offset, unsigned long size)
-{
-	offset = HYPERVISOR_ioremap(offset, size);
-	return (void __iomem *) (__IA64_UNCACHED_OFFSET | (offset));
-}
+extern void __iomem * ioremap(unsigned long offset, unsigned long size);
+extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long
size);
 
 static inline void
 iounmap (volatile void __iomem *addr)
 {
 }
-
-#define ioremap_nocache(o,s)	ioremap(o,s)
 
 /* Use normal IO mappings for DMI */
 #define dmi_ioremap ioremap

Aron Griffis

2006-Jul-27 04:10 UTC

head link

[Fedora-xen] [PATCH 3 of 5] hw_resend_irq() isn''t passed struct hw_interrupt_type in 2.6.18

2 files changed, 3 insertions(+), 4 deletions(-)
drivers/xen/core/evtchn.c |    2 +-
include/asm-ia64/hw_irq.h |    5 ++---


# HG changeset patch
# User agriffis@cheo.zko.hp.com
# Node ID 8de5c39ac1ef23a8c257fd02186d9810f9c358c5
# Parent  575b49ce64a2098515c48a3f29a214f853025fcf
hw_resend_irq() isn''t passed struct hw_interrupt_type in 2.6.18

Signed-off-by: Aron Griffis <aron@hp.com>

diff -r 575b49ce64a2 -r 8de5c39ac1ef drivers/xen/core/evtchn.c
--- a/drivers/xen/core/evtchn.c	Thu Jul 27 00:09:55 2006 -0400
+++ b/drivers/xen/core/evtchn.c	Thu Jul 27 00:09:59 2006 -0400
@@ -694,7 +694,7 @@ int irq_ignore_unhandled(unsigned int ir
 	return !!(irq_status.flags & XENIRQSTAT_shared);
 }
 
-void resend_irq_on_evtchn(struct hw_interrupt_type *h, unsigned int i)
+void resend_irq_on_evtchn(unsigned int i)
 {
 	int evtchn = evtchn_from_irq(i);
 	shared_info_t *s = HYPERVISOR_shared_info;
diff -r 575b49ce64a2 -r 8de5c39ac1ef include/asm-ia64/hw_irq.h
--- a/include/asm-ia64/hw_irq.h	Thu Jul 27 00:09:55 2006 -0400
+++ b/include/asm-ia64/hw_irq.h	Thu Jul 27 00:09:59 2006 -0400
@@ -104,10 +104,9 @@ static inline void ia64_resend_irq(unsig
 static inline void ia64_resend_irq(unsigned int vector)
 {
 #ifdef CONFIG_XEN
-	extern void resend_irq_on_evtchn(struct hw_interrupt_type *h,
-					 unsigned int i);
+	extern void resend_irq_on_evtchn(unsigned int i);
 	if (is_running_on_xen())
-		resend_irq_on_evtchn(h, vector);
+		resend_irq_on_evtchn(vector);
 	else
 #endif /* CONFIG_XEN */
 	platform_send_ipi(smp_processor_id(), vector, IA64_IPI_DM_INT, 0);

Aron Griffis

2006-Jul-27 04:10 UTC

head link

[Fedora-xen] [PATCH 4 of 5] Export some additional symbols needed for forward port to 2.6.18

1 file changed, 4 insertions(+)
arch/ia64/xen/hypervisor.c |    4 ++++


# HG changeset patch
# User agriffis@cheo.zko.hp.com
# Node ID 5602e37817d5712662b8240b5efa16a9c847c032
# Parent  8de5c39ac1ef23a8c257fd02186d9810f9c358c5
Export some additional symbols needed for forward port to 2.6.18

Signed-off-by: Aron Griffis <aron@hp.com>

diff -r 8de5c39ac1ef -r 5602e37817d5 arch/ia64/xen/hypervisor.c
--- a/arch/ia64/xen/hypervisor.c	Thu Jul 27 00:09:59 2006 -0400
+++ b/arch/ia64/xen/hypervisor.c	Thu Jul 27 00:10:03 2006 -0400
@@ -35,6 +35,7 @@ EXPORT_SYMBOL(HYPERVISOR_shared_info);
 EXPORT_SYMBOL(HYPERVISOR_shared_info);
 
 start_info_t *xen_start_info;
+EXPORT_SYMBOL(xen_start_info);
 
 int running_on_xen;
 EXPORT_SYMBOL(running_on_xen);
@@ -91,6 +92,7 @@ ia64_xenmem_reservation_op(unsigned long
 	}
 	return ret;
 }
+EXPORT_SYMBOL(ia64_xenmem_reservation_op);
 
 //XXX same as i386, x86_64 contiguous_bitmap_set(), contiguous_bitmap_clear()
 // move those to lib/contiguous_bitmap?
@@ -379,12 +381,14 @@ HYPERVISOR_grant_table_op(unsigned int c
 
 	return ____HYPERVISOR_grant_table_op(cmd, uop, count);
 }
+EXPORT_SYMBOL(HYPERVISOR_grant_table_op);
 
 
 ///////////////////////////////////////////////////////////////////////////
 // PageForeign(), SetPageForeign(), ClearPageForeign()
 
 struct address_space xen_ia64_foreign_dummy_mapping;
+EXPORT_SYMBOL(xen_ia64_foreign_dummy_mapping);
 
 ///////////////////////////////////////////////////////////////////////////
 // foreign mapping

Aron Griffis

2006-Jul-27 04:10 UTC

head link

[Fedora-xen] [PATCH 5 of 5] Fix compilation in 2.6.18 by adding #includes

4 files changed, 4 insertions(+)
drivers/xen/blkback/blkback.c   |    1 +
drivers/xen/netback/common.h    |    1 +
drivers/xen/netback/netback.c   |    1 +
drivers/xen/netfront/netfront.c |    1 +


# HG changeset patch
# User agriffis@cheo.zko.hp.com
# Node ID aabd6c30336524b8bc0cc21291870170e6e2ea97
# Parent  5602e37817d5712662b8240b5efa16a9c847c032
Fix compilation in 2.6.18 by adding #includes

Signed-off-by: Aron Griffis <aron@hp.com>

diff -r 5602e37817d5 -r aabd6c303365 drivers/xen/blkback/blkback.c
--- a/drivers/xen/blkback/blkback.c	Thu Jul 27 00:10:03 2006 -0400
+++ b/drivers/xen/blkback/blkback.c	Thu Jul 27 00:10:06 2006 -0400
@@ -40,6 +40,7 @@
 #include <linux/list.h>
 #include <xen/balloon.h>
 #include <asm/hypervisor.h>
+#include <asm/hypercall.h>
 #include "common.h"
 
 /*
diff -r 5602e37817d5 -r aabd6c303365 drivers/xen/netback/common.h
--- a/drivers/xen/netback/common.h	Thu Jul 27 00:10:03 2006 -0400
+++ b/drivers/xen/netback/common.h	Thu Jul 27 00:10:06 2006 -0400
@@ -46,6 +46,7 @@
 #include <xen/interface/grant_table.h>
 #include <xen/gnttab.h>
 #include <xen/driver_util.h>
+#include <asm/hypercall.h>
 
 #define DPRINTK(_f, _a...)			\
 	pr_debug("(file=%s, line=%d) " _f,	\
diff -r 5602e37817d5 -r aabd6c303365 drivers/xen/netback/netback.c
--- a/drivers/xen/netback/netback.c	Thu Jul 27 00:10:03 2006 -0400
+++ b/drivers/xen/netback/netback.c	Thu Jul 27 00:10:06 2006 -0400
@@ -37,6 +37,7 @@
 #include "common.h"
 #include <xen/balloon.h>
 #include <xen/interface/memory.h>
+#include <asm/page.h>
 
 /*#define NETBE_DEBUG_INTERRUPT*/
 
diff -r 5602e37817d5 -r aabd6c303365 drivers/xen/netfront/netfront.c
--- a/drivers/xen/netfront/netfront.c	Thu Jul 27 00:10:03 2006 -0400
+++ b/drivers/xen/netfront/netfront.c	Thu Jul 27 00:10:06 2006 -0400
@@ -50,6 +50,7 @@
 #include <net/pkt_sched.h>
 #include <net/arp.h>
 #include <net/route.h>
+#include <asm/hypercall.h>
 #include <asm/io.h>
 #include <asm/uaccess.h>
 #include <xen/evtchn.h>

Prarit Bhargava

2006-Jul-27 11:16 UTC

head link

[Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

Aron Griffis wrote:> Hi Juan,
>
> These patches are the result of Akio, Prarit, Alex and me working on fixing
the
> ia64 build of your tree.  At this point the bare-metal Linux kernel builds
and
> boots.  The xen kernel builds but doesn''t complete booting. 
Nonetheless, since
> these patches seem to take us most of the way there, we''d like to
request them
> to be applied to your tree.
>
>   Ack''ing this patchset.

Thanks,

P.

Juan Quintela

2006-Jul-28 00:43 UTC

head link

[Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

On Thu, 2006-07-27 at 00:10 -0400, Aron Griffis wrote:> Hi Juan,
> 
> These patches are the result of Akio, Prarit, Alex and me working on fixing
the
> ia64 build of your tree.  At this point the bare-metal Linux kernel builds
and
> boots.  The xen kernel builds but doesn''t complete booting. 
Nonetheless, since
> these patches seem to take us most of the way there, we''d like to
request them
> to be applied to your tree.
Hi Aron

All of 5 of them are integrated on linux-2.6-xen-fedora (as you can
guess, none of them is controversial).

Later, Juan.

Aron Griffis

2006-Jul-28 12:31 UTC

head link

Re: [Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

Juan Quintela wrote:  [Thu Jul 27 2006, 08:43:05PM EDT]> All of 5 of them are integrated on linux-2.6-xen-fedora (as you can
> guess, none of them is controversial).
Thank you, Juan :-)

Fedora xen - Jul 2006 - [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

[Fedora-xen] [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

[Fedora-xen] [PATCH 1 of 5] Add files which went lost in a merge goof

[Fedora-xen] [PATCH 2 of 5] Port xen ioremap mods forward to 2.6.18-rc2

[Fedora-xen] [PATCH 3 of 5] hw_resend_irq() isn''t passed struct hw_interrupt_type in 2.6.18

[Fedora-xen] [PATCH 4 of 5] Export some additional symbols needed for forward port to 2.6.18

[Fedora-xen] [PATCH 5 of 5] Fix compilation in 2.6.18 by adding #includes

[Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

[Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64

Re: [Fedora-xen] Re: [PATCH 0 of 5] fix linux-2.6-xen-fedora on ia64