powerpc: Add esr as a synonym for pt_regs.dsisr
Create an anonymous union for dsisr and esr regsiters, we can reference esr to get the exception detail when CONFIG_4xx=y or CONFIG_BOOKE=y. Otherwise, reference dsisr. This makes code more clear. Signed-off-by: Xiongwei Song <sxwjean@gmail.com> [mpe: Reword commit title] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20210807010239.416055-2-sxwjean@me.com
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@ -44,7 +44,10 @@ struct pt_regs
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#endif
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unsigned long trap;
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unsigned long dar;
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unsigned long dsisr;
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union {
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unsigned long dsisr;
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unsigned long esr;
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};
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unsigned long result;
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};
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};
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@ -1499,7 +1499,7 @@ static void __show_regs(struct pt_regs *regs)
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trap == INTERRUPT_DATA_STORAGE ||
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trap == INTERRUPT_ALIGNMENT) {
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if (IS_ENABLED(CONFIG_4xx) || IS_ENABLED(CONFIG_BOOKE))
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pr_cont("DEAR: "REG" ESR: "REG" ", regs->dar, regs->dsisr);
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pr_cont("DEAR: "REG" ESR: "REG" ", regs->dar, regs->esr);
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else
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pr_cont("DAR: "REG" DSISR: %08lx ", regs->dar, regs->dsisr);
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}
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@ -375,6 +375,8 @@ void __init pt_regs_check(void)
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offsetof(struct user_pt_regs, dar));
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BUILD_BUG_ON(offsetof(struct pt_regs, dsisr) !=
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offsetof(struct user_pt_regs, dsisr));
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BUILD_BUG_ON(offsetof(struct pt_regs, esr) !=
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offsetof(struct user_pt_regs, dsisr));
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BUILD_BUG_ON(offsetof(struct pt_regs, result) !=
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offsetof(struct user_pt_regs, result));
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@ -562,7 +562,7 @@ static inline int check_io_access(struct pt_regs *regs)
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#ifdef CONFIG_PPC_ADV_DEBUG_REGS
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/* On 4xx, the reason for the machine check or program exception
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is in the ESR. */
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#define get_reason(regs) ((regs)->dsisr)
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#define get_reason(regs) ((regs)->esr)
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#define REASON_FP ESR_FP
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#define REASON_ILLEGAL (ESR_PIL | ESR_PUO)
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#define REASON_PRIVILEGED ESR_PPR
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@ -11,7 +11,7 @@
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int machine_check_440A(struct pt_regs *regs)
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{
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unsigned long reason = regs->dsisr;
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unsigned long reason = regs->esr;
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printk("Machine check in kernel mode.\n");
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if (reason & ESR_IMCP){
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@ -48,7 +48,7 @@ int machine_check_440A(struct pt_regs *regs)
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#ifdef CONFIG_PPC_47x
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int machine_check_47x(struct pt_regs *regs)
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{
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unsigned long reason = regs->dsisr;
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unsigned long reason = regs->esr;
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u32 mcsr;
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printk(KERN_ERR "Machine check in kernel mode.\n");
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@ -10,7 +10,7 @@
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int machine_check_4xx(struct pt_regs *regs)
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{
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unsigned long reason = regs->dsisr;
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unsigned long reason = regs->esr;
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if (reason & ESR_IMCP) {
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printk("Instruction");
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