diff options
author | Ravi Bangoria <ravi.bangoria@linux.ibm.com> | 2020-05-14 16:47:37 +0530 |
---|---|---|
committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-19 00:11:05 +1000 |
commit | e68ef121c1f4c38edf87a3354661ceb99d522729 (patch) | |
tree | 19a1a3a86436cb72a841ad52e7e43ebdcb196495 /arch/powerpc/kernel | |
parent | c9e82aeb197df2d93b1b4234bc0c80943fa594e8 (diff) | |
download | linux-e68ef121c1f4c38edf87a3354661ceb99d522729.tar.bz2 |
powerpc/watchpoint: Use builtin ALIGN*() macros
Currently we calculate hw aligned start and end addresses manually.
Replace them with builtin ALIGN_DOWN() and ALIGN() macros.
So far end_addr was inclusive but this patch makes it exclusive (by
avoiding -1) for better readability.
Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Michael Neuling <mikey@neuling.org>
Link: https://lore.kernel.org/r/20200514111741.97993-13-ravi.bangoria@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r-- | arch/powerpc/kernel/hw_breakpoint.c | 12 | ||||
-rw-r--r-- | arch/powerpc/kernel/process.c | 8 | ||||
-rw-r--r-- | arch/powerpc/kernel/ptrace/ptrace-noadv.c | 2 |
3 files changed, 11 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c index 8028a2704874..4366bd0c90c4 100644 --- a/arch/powerpc/kernel/hw_breakpoint.c +++ b/arch/powerpc/kernel/hw_breakpoint.c @@ -146,10 +146,10 @@ int arch_bp_generic_fields(int type, int *gen_bp_type) * <---8 bytes---> * * In this case, we should configure hw as: - * start_addr = address & ~HW_BREAKPOINT_ALIGN + * start_addr = address & ~(HW_BREAKPOINT_SIZE - 1) * len = 16 bytes * - * @start_addr and @end_addr are inclusive. + * @start_addr is inclusive but @end_addr is exclusive. */ static int hw_breakpoint_validate_len(struct arch_hw_breakpoint *hw) { @@ -157,14 +157,14 @@ static int hw_breakpoint_validate_len(struct arch_hw_breakpoint *hw) u16 hw_len; unsigned long start_addr, end_addr; - start_addr = hw->address & ~HW_BREAKPOINT_ALIGN; - end_addr = (hw->address + hw->len - 1) | HW_BREAKPOINT_ALIGN; - hw_len = end_addr - start_addr + 1; + start_addr = ALIGN_DOWN(hw->address, HW_BREAKPOINT_SIZE); + end_addr = ALIGN(hw->address + hw->len, HW_BREAKPOINT_SIZE); + hw_len = end_addr - start_addr; if (dawr_enabled()) { max_len = DAWR_MAX_LEN; /* DAWR region can't cross 512 bytes boundary */ - if ((start_addr >> 9) != (end_addr >> 9)) + if (ALIGN(start_addr, SZ_512M) != ALIGN(end_addr - 1, SZ_512M)) return -EINVAL; } else if (IS_ENABLED(CONFIG_PPC_8xx)) { /* 8xx can setup a range without limitation */ diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 77ec1299e2fd..9b11575dcb8a 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -800,12 +800,12 @@ static inline int set_breakpoint_8xx(struct arch_hw_breakpoint *brk) unsigned long lctrl1 = LCTRL1_CTE_GT | LCTRL1_CTF_LT | LCTRL1_CRWE_RW | LCTRL1_CRWF_RW; unsigned long lctrl2 = LCTRL2_LW0EN | LCTRL2_LW0LADC | LCTRL2_SLW0EN; - unsigned long start_addr = brk->address & ~HW_BREAKPOINT_ALIGN; - unsigned long end_addr = (brk->address + brk->len - 1) | HW_BREAKPOINT_ALIGN; + unsigned long start_addr = ALIGN_DOWN(brk->address, HW_BREAKPOINT_SIZE); + unsigned long end_addr = ALIGN(brk->address + brk->len, HW_BREAKPOINT_SIZE); if (start_addr == 0) lctrl2 |= LCTRL2_LW0LA_F; - else if (end_addr == ~0U) + else if (end_addr == 0) lctrl2 |= LCTRL2_LW0LA_E; else lctrl2 |= LCTRL2_LW0LA_EandF; @@ -821,7 +821,7 @@ static inline int set_breakpoint_8xx(struct arch_hw_breakpoint *brk) lctrl1 |= LCTRL1_CRWE_WO | LCTRL1_CRWF_WO; mtspr(SPRN_CMPE, start_addr - 1); - mtspr(SPRN_CMPF, end_addr + 1); + mtspr(SPRN_CMPF, end_addr); mtspr(SPRN_LCTRL1, lctrl1); mtspr(SPRN_LCTRL2, lctrl2); diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c index 08cb8c1b504c..697c7e4b5877 100644 --- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c +++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c @@ -216,7 +216,7 @@ long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf if ((unsigned long)bp_info->addr >= TASK_SIZE) return -EIO; - brk.address = bp_info->addr & ~HW_BREAKPOINT_ALIGN; + brk.address = ALIGN_DOWN(bp_info->addr, HW_BREAKPOINT_SIZE); brk.type = HW_BRK_TYPE_TRANSLATE; brk.len = DABR_MAX_LEN; if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ) |