From: wei.guo.simon@gmail.com
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Shuah Khan <shuahkh@osg.samsung.com>,
Anton Blanchard <anton@samba.org>, Cyril Bur <cyrilbur@gmail.com>,
Simon Guo <wei.guo.simon@gmail.com>,
Ulrich Weigand <ulrich.weigand@de.ibm.com>,
Michael Neuling <mikey@neuling.org>,
Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <keescook@chromium.org>,
Rashmica Gupta <rashmicy@gmail.com>,
Khem Raj <raj.khem@gmail.com>, Jessica Yu <jeyu@redhat.com>,
Jiri Kosina <jkosina@suse.cz>, Miroslav Benes <mbenes@suse.cz>,
Suraj Jitindar Singh <sjitindarsingh@gmail.com>,
Chris Smart <chris@distroguy.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Subject: [PATCH v11 05/27] powerpc/ptrace: Enable support for NT_PPC_CFPR
Date: Sun, 17 Jul 2016 09:59:38 +0800 [thread overview]
Message-ID: <1468720800-2950-6-git-send-email-wei.guo.simon@gmail.com> (raw)
In-Reply-To: <1468720800-2950-1-git-send-email-wei.guo.simon@gmail.com>
From: Anshuman Khandual <khandual@linux.vnet.ibm.com>
This patch enables support for TM checkpointed FPR register
set ELF core note NT_PPC_CFPR based ptrace requests through
PTRACE_GETREGSET, PTRACE_SETREGSET calls. This is achieved
through adding a register set REGSET_CFPR in powerpc
corresponding to the ELF core note section added. It
implements the get, set and active functions for this new
register set added.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Cyril Bur <cyrilbur@gmail.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Simon Guo <wei.guo.simon@gmail.com>
Cc: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Rashmica Gupta <rashmicy@gmail.com>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Jessica Yu <jeyu@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Cc: Chris Smart <chris@distroguy.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Simon Guo <wei.guo.simon@gmail.com>
---
arch/powerpc/kernel/ptrace.c | 126 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 126 insertions(+)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 0334c23..a3d4bad 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -799,6 +799,121 @@ static int tm_cgpr_set(struct task_struct *target,
return ret;
}
+
+/**
+ * tm_cfpr_active - get active number of registers in CFPR
+ * @target: The target task.
+ * @regset: The user regset structure.
+ *
+ * This function checks for the active number of available
+ * regisers in transaction checkpointed FPR category.
+ */
+static int tm_cfpr_active(struct task_struct *target,
+ const struct user_regset *regset)
+{
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return 0;
+
+ return regset->n;
+}
+
+/**
+ * tm_cfpr_get - get CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy from.
+ * @ubuf: User buffer to copy into.
+ *
+ * This function gets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'ckfp_state' holds the checkpointed
+ * values for the current transaction to fall back on if it aborts
+ * in between. This function gets those checkpointed FPR registers.
+ * The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_get(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ void *kbuf, void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* copy to local buffer then write that out */
+ for (i = 0; i < 32 ; i++)
+ buf[i] = target->thread.TS_CKFPR(i);
+ buf[32] = target->thread.ckfp_state.fpscr;
+ return user_regset_copyout(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+}
+
+/**
+ * tm_cfpr_set - set CFPR registers
+ * @target: The target task.
+ * @regset: The user regset structure.
+ * @pos: The buffer position.
+ * @count: Number of bytes to copy.
+ * @kbuf: Kernel buffer to copy into.
+ * @ubuf: User buffer to copy from.
+ *
+ * This function sets in transaction checkpointed FPR registers.
+ *
+ * When the transaction is active 'ckfp_state' holds the checkpointed
+ * FPR register values for the current transaction to fall back on
+ * if it aborts in between. This function sets these checkpointed
+ * FPR registers. The userspace interface buffer layout is as follows.
+ *
+ * struct data {
+ * u64 fpr[32];
+ * u64 fpscr;
+ *};
+ */
+static int tm_cfpr_set(struct task_struct *target,
+ const struct user_regset *regset,
+ unsigned int pos, unsigned int count,
+ const void *kbuf, const void __user *ubuf)
+{
+ u64 buf[33];
+ int i;
+
+ if (!cpu_has_feature(CPU_FTR_TM))
+ return -ENODEV;
+
+ if (!MSR_TM_ACTIVE(target->thread.regs->msr))
+ return -ENODATA;
+
+ flush_fp_to_thread(target);
+ flush_altivec_to_thread(target);
+ flush_tmregs_to_thread(target);
+
+ /* copy to local buffer then write that out */
+ i = user_regset_copyin(&pos, &count, &kbuf, &ubuf, buf, 0, -1);
+ if (i)
+ return i;
+ for (i = 0; i < 32 ; i++)
+ target->thread.TS_CKFPR(i) = buf[i];
+ target->thread.ckfp_state.fpscr = buf[32];
+ return 0;
+}
#endif
/*
@@ -818,6 +933,7 @@ enum powerpc_regset {
#endif
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
REGSET_TM_CGPR, /* TM checkpointed GPR registers */
+ REGSET_TM_CFPR, /* TM checkpointed FPR registers */
#endif
};
@@ -859,6 +975,11 @@ static const struct user_regset native_regsets[] = {
.size = sizeof(long), .align = sizeof(long),
.active = tm_cgpr_active, .get = tm_cgpr_get, .set = tm_cgpr_set
},
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
#endif
};
@@ -1091,6 +1212,11 @@ static const struct user_regset compat_regsets[] = {
.active = tm_cgpr_active,
.get = tm_cgpr32_get, .set = tm_cgpr32_set
},
+ [REGSET_TM_CFPR] = {
+ .core_note_type = NT_PPC_TM_CFPR, .n = ELF_NFPREG,
+ .size = sizeof(double), .align = sizeof(double),
+ .active = tm_cfpr_active, .get = tm_cfpr_get, .set = tm_cfpr_set
+ },
#endif
};
--
1.8.3.1
next prev parent reply other threads:[~2016-07-17 2:02 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-17 1:59 [PATCH v11 00/27] Add new powerpc specific ELF core notes wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 01/27] elf: Add powerpc specific core note sections wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 02/27] powerpc/process: Add the function flush_tmregs_to_thread wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 03/27] powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 04/27] powerpc/ptrace: Enable support for NT_PPC_CGPR wei.guo.simon
2016-07-17 1:59 ` wei.guo.simon [this message]
2016-07-17 1:59 ` [PATCH v11 06/27] powerpc/ptrace: Enable support for NT_PPC_CVMX wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 07/27] powerpc/ptrace: Enable support for NT_PPC_CVSX wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 08/27] powerpc/ptrace: Enable support for TM SPR state wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 09/27] powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 10/27] powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 11/27] powerpc/ptrace: Enable support for EBB registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 12/27] powerpc/ptrace: Enable support for Performance Monitor registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 13/27] selftests/powerpc: Add more SPR numbers, TM & VMX instructions to 'reg.h' wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 14/27] selftests/powerpc: Use the new SPRN_DSCR_PRIV definiton wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 15/27] selftests/powerpc: Add ptrace tests for EBB wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 16/27] selftests/powerpc: Add ptrace tests for GPR/FPR registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 17/27] selftests/powerpc: Add ptrace tests for GPR/FPR registers in TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 18/27] selftests/powerpc: Add ptrace tests for GPR/FPR registers in suspended TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 19/27] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 20/27] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 21/27] selftests/powerpc: Add ptrace tests for TAR, PPR, DSCR in suspended TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 22/27] selftests/powerpc: Add ptrace tests for VSX, VMX registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 23/27] selftests/powerpc: Add ptrace tests for VSX, VMX registers in TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 24/27] selftests/powerpc: Add ptrace tests for VSX, VMX registers in suspended TM wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 25/27] selftests/powerpc: Add ptrace tests for TM SPR registers wei.guo.simon
2016-07-17 1:59 ` [PATCH v11 26/27] selftests/powerpc: Add .gitignore file for ptrace executables wei.guo.simon
2016-07-17 2:00 ` [PATCH v11 27/27] selftests/powerpc: Fix a build issue wei.guo.simon
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