| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <alpine.DEB.0.99.0706040738530.10505@chino.kir.corp.google.com>
Date: Mon, 4 Jun 2007 07:40:53 -0700 (PDT)
From: David Rientjes <rientjes@...gle.com>
To: Stephane Eranian <eranian@...nkl.hpl.hp.com>
cc: linux-kernel@...r.kernel.org, eranian@....hp.com
Subject: Re: [PATCH 17/22] 2.6.22-rc3 perfmon2 : modified powerpc files
On Tue, 29 May 2007, Stephane Eranian wrote:
> This patch contains the modified powerpc files.
>
>
> The modified files are as follows:
>
> arch/powerpc/Kconfig:
> - add link to perfmon menuconfig options
>
> arch/powerpc/Makefile:
> - add perfmon subdir
>
> arch/powerpc/kernel/entry_64.S:
> - add hook for extra work before kernel exit. Need to block a thread after a overflow with
> user level notification. Also needed to do some bookeeeping, such as reset certain counters
> and cleanup in some difficult corner cases
>
> arch/powerpc/kernel/process.c:
> - add hook in exit_thread() to cleanup perfmon2 context
> - add hook in copy_thread() to cleanup perfmon2 context in child (perfmon2 context
> is never inherited)
> - add hook in __switch_to() for PMU state save/restore
>
> arch/powerpc/kernel/systbl.S:
> - add new system calls definitions
>
> include/asm-powerpc/thread_info.h:
> - add TIF_PERFMON which is used for PMU context switching in __switch_to()
>
You mean TIF_PERFMON_CTXSW and TIF_PERFMON_WORK.
> include/asm-powerpc/unistd.h:
> - add new system calls
>
>
>
>
> diff --exclude=.git -urp linux-2.6.22.base/arch/powerpc/Kconfig linux-2.6.22/arch/powerpc/Kconfig
> --- linux-2.6.22.base/arch/powerpc/Kconfig 2007-05-29 03:17:16.000000000 -0700
> +++ linux-2.6.22/arch/powerpc/Kconfig 2007-05-29 03:24:14.000000000 -0700
> @@ -392,6 +392,9 @@ config NOT_COHERENT_CACHE
>
> config CONFIG_CHECK_CACHE_COHERENCY
> bool
> +
> +source "arch/powerpc/perfmon/Kconfig"
> +
> endmenu
>
> source "init/Kconfig"
> diff --exclude=.git -urp linux-2.6.22.base/arch/powerpc/Makefile linux-2.6.22/arch/powerpc/Makefile
> --- linux-2.6.22.base/arch/powerpc/Makefile 2007-05-29 03:17:16.000000000 -0700
> +++ linux-2.6.22/arch/powerpc/Makefile 2007-05-29 03:24:14.000000000 -0700
> @@ -137,6 +137,7 @@ core-y += arch/powerpc/kernel/ \
> arch/powerpc/platforms/
> core-$(CONFIG_MATH_EMULATION) += arch/powerpc/math-emu/
> core-$(CONFIG_XMON) += arch/powerpc/xmon/
> +core-$(CONFIG_PERFMON) += arch/powerpc/perfmon/
>
> drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
>
> diff --exclude=.git -urp linux-2.6.22.base/arch/powerpc/kernel/entry_32.S linux-2.6.22/arch/powerpc/kernel/entry_32.S
> --- linux-2.6.22.base/arch/powerpc/kernel/entry_32.S 2007-05-29 03:17:16.000000000 -0700
> +++ linux-2.6.22/arch/powerpc/kernel/entry_32.S 2007-05-29 03:24:14.000000000 -0700
> @@ -38,7 +38,7 @@
> * MSR_KERNEL is > 0x10000 on 4xx/Book-E since it include MSR_CE.
> */
> #if MSR_KERNEL >= 0x10000
> -#define LOAD_MSR_KERNEL(r, x) lis r,(x)@h; ori r,r,(x)@l
> +#define LOAD_MSR_KERNEL(r, x) lis r,(x)@ha; ori r,r,(x)@l
> #else
> #define LOAD_MSR_KERNEL(r, x) li r,(x)
> #endif
> diff --exclude=.git -urp linux-2.6.22.base/arch/powerpc/kernel/entry_64.S linux-2.6.22/arch/powerpc/kernel/entry_64.S
> --- linux-2.6.22.base/arch/powerpc/kernel/entry_64.S 2007-05-29 03:20:21.000000000 -0700
> +++ linux-2.6.22/arch/powerpc/kernel/entry_64.S 2007-05-29 03:24:14.000000000 -0700
> @@ -587,6 +587,10 @@ user_work:
> b .ret_from_except_lite
>
> 1: bl .save_nvgprs
> +#ifdef CONFIG_PERFMON
> + addi r3,r1,STACK_FRAME_OVERHEAD
> + bl .__pfm_handle_work
> +#endif /* CONFIG_PERFMON */
> li r3,0
> addi r4,r1,STACK_FRAME_OVERHEAD
> bl .do_signal
> diff --exclude=.git -urp linux-2.6.22.base/arch/powerpc/kernel/process.c linux-2.6.22/arch/powerpc/kernel/process.c
> --- linux-2.6.22.base/arch/powerpc/kernel/process.c 2007-05-29 03:17:16.000000000 -0700
> +++ linux-2.6.22/arch/powerpc/kernel/process.c 2007-05-29 03:24:14.000000000 -0700
> @@ -33,6 +33,7 @@
> #include <linux/mqueue.h>
> #include <linux/hardirq.h>
> #include <linux/utsname.h>
> +#include <linux/perfmon.h>
>
> #include <asm/pgtable.h>
> #include <asm/uaccess.h>
> @@ -322,6 +323,9 @@ struct task_struct *__switch_to(struct t
> new_thread->start_tb = current_tb;
> }
> #endif
> + if (test_tsk_thread_flag(new, TIF_PERFMON_CTXSW)
> + || test_tsk_thread_flag(prev, TIF_PERFMON_CTXSW))
> + pfm_ctxsw(prev, new);
>
> local_irq_save(flags);
>
> @@ -455,6 +459,7 @@ void show_regs(struct pt_regs * regs)
> void exit_thread(void)
> {
> discard_lazy_cpu_state();
> + pfm_exit_thread(current);
> }
>
> void flush_thread(void)
> @@ -570,6 +575,7 @@ int copy_thread(int nr, unsigned long cl
> #else
> kregs->nip = (unsigned long)ret_from_fork;
> #endif
> + pfm_copy_thread(p);
>
> return 0;
> }
> Only in linux-2.6.22/arch/powerpc: perfmon
> Only in linux-2.6.22/include/asm-powerpc: perfmon.h
> Only in linux-2.6.22/include/asm-powerpc: perfmon_api.h
> diff --exclude=.git -urp linux-2.6.22.base/include/asm-powerpc/systbl.h linux-2.6.22/include/asm-powerpc/systbl.h
> --- linux-2.6.22.base/include/asm-powerpc/systbl.h 2007-05-29 03:17:57.000000000 -0700
> +++ linux-2.6.22/include/asm-powerpc/systbl.h 2007-05-29 03:24:14.000000000 -0700
> @@ -311,3 +311,15 @@ COMPAT_SYS_SPU(utimensat)
> COMPAT_SYS_SPU(signalfd)
> COMPAT_SYS_SPU(timerfd)
> SYSCALL_SPU(eventfd)
> +SYSCALL(pfm_create_context)
> +SYSCALL(pfm_write_pmcs)
> +SYSCALL(pfm_write_pmds)
> +SYSCALL(pfm_read_pmds)
> +SYSCALL(pfm_load_context)
> +SYSCALL(pfm_start)
> +SYSCALL(pfm_stop)
> +SYSCALL(pfm_restart)
> +SYSCALL(pfm_create_evtsets)
> +SYSCALL(pfm_getinfo_evtsets)
> +SYSCALL(pfm_delete_evtsets)
> +SYSCALL(pfm_unload_context)
> diff --exclude=.git -urp linux-2.6.22.base/include/asm-powerpc/thread_info.h linux-2.6.22/include/asm-powerpc/thread_info.h
> --- linux-2.6.22.base/include/asm-powerpc/thread_info.h 2007-05-29 03:20:21.000000000 -0700
> +++ linux-2.6.22/include/asm-powerpc/thread_info.h 2007-05-29 03:24:14.000000000 -0700
> @@ -112,16 +112,18 @@ static inline struct thread_info *curren
> #define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
> TIF_NEED_RESCHED */
> #define TIF_32BIT 4 /* 32 bit binary */
> -#define TIF_RUNLATCH 5 /* Is the runlatch enabled? */
> -#define TIF_ABI_PENDING 6 /* 32/64 bit switch needed */
> +#define TIF_PERFMON_WORK 5 /* work for pfm_handle_work() */
> +#define TIF_PERFMON_CTXSW 6 /* perfmon needs ctxsw calls */
> #define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
> #define TIF_SINGLESTEP 8 /* singlestepping active */
> #define TIF_MEMDIE 9
> #define TIF_SECCOMP 10 /* secure computing */
> #define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
> -#define TIF_NOERROR 14 /* Force successful syscall return */
> -#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
> -#define TIF_FREEZE 16 /* Freezing for suspend */
> +#define TIF_NOERROR 12 /* Force successful syscall return */
> +#define TIF_RESTORE_SIGMASK 13 /* Restore signal mask in do_signal */
> +#define TIF_FREEZE 14 /* Freezing for suspend */
> +#define TIF_RUNLATCH 15 /* Is the runlatch enabled? */
> +#define TIF_ABI_PENDING 16 /* 32/64 bit switch needed */
>
> /* as above, but as bit values */
> #define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
> @@ -129,8 +131,8 @@ static inline struct thread_info *curren
> #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
> #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
> #define _TIF_32BIT (1<<TIF_32BIT)
> -#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
> -#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
> +#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
> +#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
> #define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
> #define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
> #define _TIF_SECCOMP (1<<TIF_SECCOMP)
> @@ -138,10 +140,14 @@ static inline struct thread_info *curren
> #define _TIF_NOERROR (1<<TIF_NOERROR)
> #define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
> #define _TIF_FREEZE (1<<TIF_FREEZE)
> +#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
> +#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
> #define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
> +#define _TIF_PERFMON_WORK (1<<TIF_PERFMON_WORK)
> +#define _TIF_PERFMON_CTXSW (1<<TIF_PERFMON_CTXSW)
>
> -#define _TIF_USER_WORK_MASK ( _TIF_SIGPENDING | \
> - _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
> +#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | \
> + _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK| _TIF_PERFMON_WORK)
> #define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
No need to move _TIF_RUNLATCH or _TIF_ABI_PENDING.
>
> /* Bits in local_flags */
> diff --exclude=.git -urp linux-2.6.22.base/include/asm-powerpc/unistd.h linux-2.6.22/include/asm-powerpc/unistd.h
> --- linux-2.6.22.base/include/asm-powerpc/unistd.h 2007-05-29 03:17:57.000000000 -0700
> +++ linux-2.6.22/include/asm-powerpc/unistd.h 2007-05-29 03:24:14.000000000 -0700
> @@ -330,10 +330,22 @@
> #define __NR_signalfd 305
> #define __NR_timerfd 306
> #define __NR_eventfd 307
> +#define __NR_pfm_create_context 308
> +#define __NR_pfm_write_pmcs (__NR_pfm_create_context+1)
> +#define __NR_pfm_write_pmds (__NR_pfm_create_context+2)
> +#define __NR_pfm_read_pmds (__NR_pfm_create_context+3)
> +#define __NR_pfm_load_context (__NR_pfm_create_context+4)
> +#define __NR_pfm_start (__NR_pfm_create_context+5)
> +#define __NR_pfm_stop (__NR_pfm_create_context+6)
> +#define __NR_pfm_restart (__NR_pfm_create_context+7)
> +#define __NR_pfm_create_evtsets (__NR_pfm_create_context+8)
> +#define __NR_pfm_getinfo_evtsets (__NR_pfm_create_context+9)
> +#define __NR_pfm_delete_evtsets (__NR_pfm_create_context+10)
> +#define __NR_pfm_unload_context (__NR_pfm_create_context+11)
>
> #ifdef __KERNEL__
>
> -#define __NR_syscalls 308
> +#define __NR_syscalls 319
>
The highest numbered syscall, __NR_pfm_create_context+11, is 319 and
__NR_syscalls is set to the same, which is wrong.
David
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists