From 9129886b88185962538180625ca8051362b01327 Mon Sep 17 00:00:00 2001 From: John David Anglin Date: Sat, 22 Jan 2022 18:19:49 +0000 Subject: parisc: Drop __init from map_pages declaration With huge kernel pages, we randomly eat a SPARC in map_pages(). This is fixed by dropping __init from the declaration. However, map_pages references the __init routine memblock_alloc_try_nid via memblock_alloc. Thus, it needs to be marked with __ref. memblock_alloc is only called before the kernel text is set to readonly. The __ref on free_initmem is no longer needed. Comment regarding map_pages being in the init section is removed. Signed-off-by: John David Anglin Cc: stable@vger.kernel.org # v5.4+ Signed-off-by: Helge Deller --- arch/parisc/mm/init.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) (limited to 'arch') diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c index 1ae31db9988f..1dc2e88e7b04 100644 --- a/arch/parisc/mm/init.c +++ b/arch/parisc/mm/init.c @@ -337,9 +337,9 @@ static void __init setup_bootmem(void) static bool kernel_set_to_readonly; -static void __init map_pages(unsigned long start_vaddr, - unsigned long start_paddr, unsigned long size, - pgprot_t pgprot, int force) +static void __ref map_pages(unsigned long start_vaddr, + unsigned long start_paddr, unsigned long size, + pgprot_t pgprot, int force) { pmd_t *pmd; pte_t *pg_table; @@ -449,7 +449,7 @@ void __init set_kernel_text_rw(int enable_read_write) flush_tlb_all(); } -void __ref free_initmem(void) +void free_initmem(void) { unsigned long init_begin = (unsigned long)__init_begin; unsigned long init_end = (unsigned long)__init_end; @@ -463,7 +463,6 @@ void __ref free_initmem(void) /* The init text pages are marked R-X. We have to * flush the icache and mark them RW- * - * This is tricky, because map_pages is in the init section. * Do a dummy remap of the data section first (the data * section is already PAGE_KERNEL) to pull in the TLB entries * for map_kernel */ -- cgit From 18a1d5e1945385d9b5adc3fe11427ce4a9d2826e Mon Sep 17 00:00:00 2001 From: Andy Shevchenko Date: Mon, 7 Feb 2022 17:16:39 +0200 Subject: parisc: Add ioread64_lo_hi() and iowrite64_lo_hi() It's a followup to the previous commit f15309d7ad5d ("parisc: Add ioread64_hi_lo() and iowrite64_hi_lo()") which does only half of the job. Add the rest, so we won't get a new kernel test robot reports. Fixes: f15309d7ad5d ("parisc: Add ioread64_hi_lo() and iowrite64_hi_lo()") Signed-off-by: Andy Shevchenko Signed-off-by: Helge Deller --- arch/parisc/lib/iomap.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'arch') diff --git a/arch/parisc/lib/iomap.c b/arch/parisc/lib/iomap.c index 367f6397bda7..860385058085 100644 --- a/arch/parisc/lib/iomap.c +++ b/arch/parisc/lib/iomap.c @@ -346,6 +346,16 @@ u64 ioread64be(const void __iomem *addr) return *((u64 *)addr); } +u64 ioread64_lo_hi(const void __iomem *addr) +{ + u32 low, high; + + low = ioread32(addr); + high = ioread32(addr + sizeof(u32)); + + return low + ((u64)high << 32); +} + u64 ioread64_hi_lo(const void __iomem *addr) { u32 low, high; @@ -419,6 +429,12 @@ void iowrite64be(u64 datum, void __iomem *addr) } } +void iowrite64_lo_hi(u64 val, void __iomem *addr) +{ + iowrite32(val, addr); + iowrite32(val >> 32, addr + sizeof(u32)); +} + void iowrite64_hi_lo(u64 val, void __iomem *addr) { iowrite32(val >> 32, addr + sizeof(u32)); @@ -530,6 +546,7 @@ EXPORT_SYMBOL(ioread32); EXPORT_SYMBOL(ioread32be); EXPORT_SYMBOL(ioread64); EXPORT_SYMBOL(ioread64be); +EXPORT_SYMBOL(ioread64_lo_hi); EXPORT_SYMBOL(ioread64_hi_lo); EXPORT_SYMBOL(iowrite8); EXPORT_SYMBOL(iowrite16); @@ -538,6 +555,7 @@ EXPORT_SYMBOL(iowrite32); EXPORT_SYMBOL(iowrite32be); EXPORT_SYMBOL(iowrite64); EXPORT_SYMBOL(iowrite64be); +EXPORT_SYMBOL(iowrite64_lo_hi); EXPORT_SYMBOL(iowrite64_hi_lo); EXPORT_SYMBOL(ioread8_rep); EXPORT_SYMBOL(ioread16_rep); -- cgit From b160628e9ebcdc85d0db9d7f423c26b3c7c179d0 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 13 Feb 2022 22:29:25 +0100 Subject: parisc: Show error if wrong 32/64-bit compiler is being used It happens quite often that people use the wrong compiler to build the kernel: make ARCH=parisc -> builds the 32-bit kernel make ARCH=parisc64 -> builds the 64-bit kernel This patch adds a sanity check which errors out with an instruction how use the correct ARCH= option. Signed-off-by: Helge Deller Cc: stable@vger.kernel.org # v5.15+ --- arch/parisc/include/asm/bitops.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch') diff --git a/arch/parisc/include/asm/bitops.h b/arch/parisc/include/asm/bitops.h index 0ec9cfc5131f..56ffd260c669 100644 --- a/arch/parisc/include/asm/bitops.h +++ b/arch/parisc/include/asm/bitops.h @@ -12,6 +12,14 @@ #include #include +/* compiler build environment sanity checks: */ +#if !defined(CONFIG_64BIT) && defined(__LP64__) +#error "Please use 'ARCH=parisc' to build the 32-bit kernel." +#endif +#if defined(CONFIG_64BIT) && !defined(__LP64__) +#error "Please use 'ARCH=parisc64' to build the 64-bit kernel." +#endif + /* See http://marc.theaimsgroup.com/?t=108826637900003 for discussion * on use of volatile and __*_bit() (set/clear/change): * *_bit() want use of volatile. -- cgit From dbd0b42350d5717786cb8257fbe5b528f3af9772 Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 13 Feb 2022 22:52:11 +0100 Subject: parisc: Fix some apparent put_user() failures After commit 4b9d2a731c3d ("parisc: Switch user access functions to signal errors in r29 instead of r8") bash suddenly started to report those warnings after login: -bash: cannot set terminal process group (-1): Bad file descriptor -bash: no job control in this shell It turned out, that a function call inside a put_user(), e.g.: put_user(vt_do_kdgkbmode(console), (int __user *)arg); clobbered the error register (r29) and thus the put_user() call itself seem to have failed. Rearrange the C-code to pre-calculate the intermediate value and then do the put_user(). Additionally prefer the "+" constraint on pu_err and gu_err registers to tell the compiler that those operands are both read and written by the assembly instruction. Reported-by: John David Anglin Signed-off-by: Helge Deller Fixes: 4b9d2a731c3d ("parisc: Switch user access functions to signal errors in r29 instead of r8") Signed-off-by: Helge Deller --- arch/parisc/include/asm/uaccess.h | 29 +++++++++++++++-------------- 1 file changed, 15 insertions(+), 14 deletions(-) (limited to 'arch') diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h index ebf8a845b017..123d5f16cd9d 100644 --- a/arch/parisc/include/asm/uaccess.h +++ b/arch/parisc/include/asm/uaccess.h @@ -89,8 +89,8 @@ struct exception_table_entry { __asm__("1: " ldx " 0(" sr "%2),%0\n" \ "9:\n" \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \ - : "=r"(__gu_val), "=r"(__gu_err) \ - : "r"(ptr), "1"(__gu_err)); \ + : "=r"(__gu_val), "+r"(__gu_err) \ + : "r"(ptr)); \ \ (val) = (__force __typeof__(*(ptr))) __gu_val; \ } @@ -123,8 +123,8 @@ struct exception_table_entry { "9:\n" \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 9b) \ - : "=&r"(__gu_tmp.l), "=r"(__gu_err) \ - : "r"(ptr), "1"(__gu_err)); \ + : "=&r"(__gu_tmp.l), "+r"(__gu_err) \ + : "r"(ptr)); \ \ (val) = __gu_tmp.t; \ } @@ -135,13 +135,12 @@ struct exception_table_entry { #define __put_user_internal(sr, x, ptr) \ ({ \ ASM_EXCEPTIONTABLE_VAR(__pu_err); \ - __typeof__(*(ptr)) __x = (__typeof__(*(ptr)))(x); \ \ switch (sizeof(*(ptr))) { \ - case 1: __put_user_asm(sr, "stb", __x, ptr); break; \ - case 2: __put_user_asm(sr, "sth", __x, ptr); break; \ - case 4: __put_user_asm(sr, "stw", __x, ptr); break; \ - case 8: STD_USER(sr, __x, ptr); break; \ + case 1: __put_user_asm(sr, "stb", x, ptr); break; \ + case 2: __put_user_asm(sr, "sth", x, ptr); break; \ + case 4: __put_user_asm(sr, "stw", x, ptr); break; \ + case 8: STD_USER(sr, x, ptr); break; \ default: BUILD_BUG(); \ } \ \ @@ -150,7 +149,9 @@ struct exception_table_entry { #define __put_user(x, ptr) \ ({ \ - __put_user_internal("%%sr3,", x, ptr); \ + __typeof__(&*(ptr)) __ptr = ptr; \ + __typeof__(*(__ptr)) __x = (__typeof__(*(__ptr)))(x); \ + __put_user_internal("%%sr3,", __x, __ptr); \ }) #define __put_kernel_nofault(dst, src, type, err_label) \ @@ -180,8 +181,8 @@ struct exception_table_entry { "1: " stx " %2,0(" sr "%1)\n" \ "9:\n" \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \ - : "=r"(__pu_err) \ - : "r"(ptr), "r"(x), "0"(__pu_err)) + : "+r"(__pu_err) \ + : "r"(ptr), "r"(x)) #if !defined(CONFIG_64BIT) @@ -193,8 +194,8 @@ struct exception_table_entry { "9:\n" \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(1b, 9b) \ ASM_EXCEPTIONTABLE_ENTRY_EFAULT(2b, 9b) \ - : "=r"(__pu_err) \ - : "r"(ptr), "r"(__val), "0"(__pu_err)); \ + : "+r"(__pu_err) \ + : "r"(ptr), "r"(__val)); \ } while (0) #endif /* !defined(CONFIG_64BIT) */ -- cgit