powerpc fixes for 5.6 #4
One fix for a recent regression to our breakpoint/watchpoint code. Another fix for our KUAP support, this time a missing annotation in a rarely used path in signal handling. A fix for our handling of a CPU feature that effects the PMU, when booting guests in some configurations. A minor fix to our linker script to explicitly include the .BTF section. Thanks to: Christophe Leroy, Desnes A. Nunes do Rosario, Leonardo Bras, Naveen N. Rao, Ravi Bangoria, Stefan Berger. -----BEGIN PGP SIGNATURE----- iQJHBAABCAAxFiEEJFGtCPCthwEv2Y/bUevqPMjhpYAFAl5jhLUTHG1wZUBlbGxl cm1hbi5pZC5hdQAKCRBR6+o8yOGlgIWYEACRI3ikfcO3V/QtV6wcgceBtXKyuEUz +E54neKhgpxRa66IUKXe9NgI4n9G6YTyG3Ee+iFfP4BR6bJpjiGxtypBSqTpDfql 19QACPJtn+hft/YT2zy0S8SS6CE9TCC25PpOURYb7VVoAn3PG1nmdBj1zoEdsVoZ WZgkj2we03FQton8ctangP2Atd4L9ngUEUw7m1XvyX+MaMVE2Ev24Q5Es1Xu4tUs 4U/g+TZvZeVB/Y44Km7bur3OTis0YcB7LBSD5goJSgj3PQXYhq9/7AegaH5cpiLu sDfBfEOjCnU5zuUwZkmlfmnm6YfqBinRpiUZzePuY3LTH5IjYlWXBzsFaiKUaP+8 /mPypoR2ufhJ+pAKWqGs+iU19F5rqN0gVS0ELzxQTn7yT0yAPtVtpym4CyXYQTlF sQSqEK/S0U+NEP0jvHBnv9sIjwNXvGo+r8mdHDrxIYKFEm54fZDhS088/vq7Zc+2 BrHfp6XCE7Eo0qn+5DV8ei456QkkR9McG2Ile6u0M1eh06EqqcnGfs6wrrD3nQe8 Ptf+VWWdJM8W7Dv8dc7+JbLhtcVT+tRPyUOPdmRqT93ve/epsfNeujX5+ewhfIbG n22Ypm0zOIoq4ceaCY+vl56vUyXYXP5oz72WqjVuTncQrbAWjaNy2iklDyxbjQkI T25co1MTGsMjEA== =AjkM -----END PGP SIGNATURE----- Merge tag 'powerpc-5.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc fixes from Michael Ellerman: "Some more powerpc fixes for 5.6: - One fix for a recent regression to our breakpoint/watchpoint code. - Another fix for our KUAP support, this time a missing annotation in a rarely used path in signal handling. - A fix for our handling of a CPU feature that effects the PMU, when booting guests in some configurations. - A minor fix to our linker script to explicitly include the .BTF section. Thanks to: Christophe Leroy, Desnes A. Nunes do Rosario, Leonardo Bras, Naveen N. Rao, Ravi Bangoria, Stefan Berger" * tag 'powerpc-5.6-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/mm: Fix missing KUAP disable in flush_coherent_icache() powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems powerpc: Include .BTF section powerpc/watchpoint: Don't call dar_within_range() for Book3S
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commit
5236647adb
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@ -2193,11 +2193,13 @@ static struct cpu_spec * __init setup_cpu_spec(unsigned long offset,
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* oprofile_cpu_type already has a value, then we are
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* possibly overriding a real PVR with a logical one,
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* and, in that case, keep the current value for
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* oprofile_cpu_type.
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* oprofile_cpu_type. Futhermore, let's ensure that the
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* fix for the PMAO bug is enabled on compatibility mode.
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*/
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if (old.oprofile_cpu_type != NULL) {
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t->oprofile_cpu_type = old.oprofile_cpu_type;
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t->oprofile_type = old.oprofile_type;
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t->cpu_features |= old.cpu_features & CPU_FTR_PMAO_BUG;
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}
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}
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@ -331,11 +331,13 @@ int hw_breakpoint_handler(struct die_args *args)
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}
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info->type &= ~HW_BRK_TYPE_EXTRANEOUS_IRQ;
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if (!dar_within_range(regs->dar, info))
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info->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ;
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if (!IS_ENABLED(CONFIG_PPC_8xx) && !stepping_handler(regs, bp, info))
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goto out;
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if (IS_ENABLED(CONFIG_PPC_8xx)) {
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if (!dar_within_range(regs->dar, info))
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info->type |= HW_BRK_TYPE_EXTRANEOUS_IRQ;
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} else {
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if (!stepping_handler(regs, bp, info))
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goto out;
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}
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/*
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* As a policy, the callback is invoked in a 'trigger-after-execute'
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@ -303,6 +303,12 @@ SECTIONS
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*(.branch_lt)
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}
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#ifdef CONFIG_DEBUG_INFO_BTF
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.BTF : AT(ADDR(.BTF) - LOAD_OFFSET) {
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*(.BTF)
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}
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#endif
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.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
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__start_opd = .;
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KEEP(*(.opd))
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@ -373,7 +373,9 @@ static inline bool flush_coherent_icache(unsigned long addr)
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*/
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if (cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
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mb(); /* sync */
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allow_read_from_user((const void __user *)addr, L1_CACHE_BYTES);
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icbi((void *)addr);
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prevent_read_from_user((const void __user *)addr, L1_CACHE_BYTES);
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mb(); /* sync */
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isync();
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return true;
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