* Patch "powerpc: Emulation support for load/store instructions on LE" has been added to the 4.9-stable tree
@ 2017-03-15 7:59 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2017-03-15 7:59 UTC (permalink / raw)
To: ravi.bangoria, anton, gregkh, mpe; +Cc: stable, stable-commits
This is a note to let you know that I've just added the patch titled
powerpc: Emulation support for load/store instructions on LE
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-emulation-support-for-load-store-instructions-on-le.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From e148bd17f48bd17fca2f4f089ec879fa6e47e34c Mon Sep 17 00:00:00 2001
From: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Date: Tue, 14 Feb 2017 14:46:42 +0530
Subject: powerpc: Emulation support for load/store instructions on LE
From: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
commit e148bd17f48bd17fca2f4f089ec879fa6e47e34c upstream.
emulate_step() uses a number of underlying kernel functions that were
initially not enabled for LE. This has been rectified since. So, fix
emulate_step() for LE for the corresponding instructions.
Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/lib/sstep.c | 20 --------------------
1 file changed, 20 deletions(-)
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1807,8 +1807,6 @@ int __kprobes emulate_step(struct pt_reg
goto instr_done;
case LARX:
- if (regs->msr & MSR_LE)
- return 0;
if (op.ea & (size - 1))
break; /* can't handle misaligned */
err = -EFAULT;
@@ -1832,8 +1830,6 @@ int __kprobes emulate_step(struct pt_reg
goto ldst_done;
case STCX:
- if (regs->msr & MSR_LE)
- return 0;
if (op.ea & (size - 1))
break; /* can't handle misaligned */
err = -EFAULT;
@@ -1859,8 +1855,6 @@ int __kprobes emulate_step(struct pt_reg
goto ldst_done;
case LOAD:
- if (regs->msr & MSR_LE)
- return 0;
err = read_mem(®s->gpr[op.reg], op.ea, size, regs);
if (!err) {
if (op.type & SIGNEXT)
@@ -1872,8 +1866,6 @@ int __kprobes emulate_step(struct pt_reg
#ifdef CONFIG_PPC_FPU
case LOAD_FP:
- if (regs->msr & MSR_LE)
- return 0;
if (size == 4)
err = do_fp_load(op.reg, do_lfs, op.ea, size, regs);
else
@@ -1882,15 +1874,11 @@ int __kprobes emulate_step(struct pt_reg
#endif
#ifdef CONFIG_ALTIVEC
case LOAD_VMX:
- if (regs->msr & MSR_LE)
- return 0;
err = do_vec_load(op.reg, do_lvx, op.ea & ~0xfUL, regs);
goto ldst_done;
#endif
#ifdef CONFIG_VSX
case LOAD_VSX:
- if (regs->msr & MSR_LE)
- return 0;
err = do_vsx_load(op.reg, do_lxvd2x, op.ea, regs);
goto ldst_done;
#endif
@@ -1913,8 +1901,6 @@ int __kprobes emulate_step(struct pt_reg
goto instr_done;
case STORE:
- if (regs->msr & MSR_LE)
- return 0;
if ((op.type & UPDATE) && size == sizeof(long) &&
op.reg == 1 && op.update_reg == 1 &&
!(regs->msr & MSR_PR) &&
@@ -1927,8 +1913,6 @@ int __kprobes emulate_step(struct pt_reg
#ifdef CONFIG_PPC_FPU
case STORE_FP:
- if (regs->msr & MSR_LE)
- return 0;
if (size == 4)
err = do_fp_store(op.reg, do_stfs, op.ea, size, regs);
else
@@ -1937,15 +1921,11 @@ int __kprobes emulate_step(struct pt_reg
#endif
#ifdef CONFIG_ALTIVEC
case STORE_VMX:
- if (regs->msr & MSR_LE)
- return 0;
err = do_vec_store(op.reg, do_stvx, op.ea & ~0xfUL, regs);
goto ldst_done;
#endif
#ifdef CONFIG_VSX
case STORE_VSX:
- if (regs->msr & MSR_LE)
- return 0;
err = do_vsx_store(op.reg, do_stxvd2x, op.ea, regs);
goto ldst_done;
#endif
Patches currently in stable-queue which might be from ravi.bangoria@linux.vnet.ibm.com are
queue-4.9/powerpc-emulation-support-for-load-store-instructions-on-le.patch
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2017-03-15 7:59 Patch "powerpc: Emulation support for load/store instructions on LE" has been added to the 4.9-stable tree gregkh
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