Merge tag 'v5.0-rc7' into patchwork

Linux 5.0-rc7

* tag 'v5.0-rc7': (1667 commits)
  Linux 5.0-rc7
  Input: elan_i2c - add ACPI ID for touchpad in Lenovo V330-15ISK
  Input: st-keyscan - fix potential zalloc NULL dereference
  Input: apanel - switch to using brightness_set_blocking()
  powerpc/64s: Fix possible corruption on big endian due to pgd/pud_present()
  efi/arm: Revert "Defer persistent reservations until after paging_init()"
  arm64, mm, efi: Account for GICv3 LPI tables in static memblock reserve table
  sunrpc: fix 4 more call sites that were using stack memory with a scatterlist
  include/linux/module.h: copy __init/__exit attrs to init/cleanup_module
  Compiler Attributes: add support for __copy (gcc >= 9)
  lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure
  auxdisplay: ht16k33: fix potential user-after-free on module unload
  x86/platform/UV: Use efi_runtime_lock to serialise BIOS calls
  i2c: bcm2835: Clear current buffer pointers and counts after a transfer
  i2c: cadence: Fix the hold bit setting
  drm: Use array_size() when creating lease
  dm thin: fix bug where bio that overwrites thin block ignores FUA
  Revert "exec: load_script: don't blindly truncate shebang string"
  Revert "gfs2: read journal in large chunks to locate the head"
  net: ethernet: freescale: set FEC ethtool regs version
  ...

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

1 files changed, 25 insertions, 25 deletions

diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
index 4f8972311a77..14e6119838a6 100644
--- a/arch/x86/mm/pageattr.c
+++ b/arch/x86/mm/pageattr.c
@@ -230,6 +230,29 @@ static bool __cpa_pfn_in_highmap(unsigned long pfn)
 
 #endif
 
+/*
+ * See set_mce_nospec().
+ *
+ * Machine check recovery code needs to change cache mode of poisoned pages to
+ * UC to avoid speculative access logging another error. But passing the
+ * address of the 1:1 mapping to set_memory_uc() is a fine way to encourage a
+ * speculative access. So we cheat and flip the top bit of the address. This
+ * works fine for the code that updates the page tables. But at the end of the
+ * process we need to flush the TLB and cache and the non-canonical address
+ * causes a #GP fault when used by the INVLPG and CLFLUSH instructions.
+ *
+ * But in the common case we already have a canonical address. This code
+ * will fix the top bit if needed and is a no-op otherwise.
+ */
+static inline unsigned long fix_addr(unsigned long addr)
+{
+#ifdef CONFIG_X86_64
+	return (long)(addr << 1) >> 1;
+#else
+	return addr;
+#endif
+}
+
 static unsigned long __cpa_addr(struct cpa_data *cpa, unsigned long idx)
 {
 	if (cpa->flags & CPA_PAGES_ARRAY) {
@@ -313,7 +336,7 @@ void __cpa_flush_tlb(void *data)
 	unsigned int i;
 
 	for (i = 0; i < cpa->numpages; i++)
-		__flush_tlb_one_kernel(__cpa_addr(cpa, i));
+		__flush_tlb_one_kernel(fix_addr(__cpa_addr(cpa, i)));
 }
 
 static void cpa_flush(struct cpa_data *data, int cache)
@@ -347,7 +370,7 @@ static void cpa_flush(struct cpa_data *data, int cache)
 		 * Only flush present addresses:
 		 */
 		if (pte && (pte_val(*pte) & _PAGE_PRESENT))
-			clflush_cache_range_opt((void *)addr, PAGE_SIZE);
+			clflush_cache_range_opt((void *)fix_addr(addr), PAGE_SIZE);
 	}
 	mb();
 }
@@ -1627,29 +1650,6 @@ out:
 	return ret;
 }
 
-/*
- * Machine check recovery code needs to change cache mode of poisoned
- * pages to UC to avoid speculative access logging another error. But
- * passing the address of the 1:1 mapping to set_memory_uc() is a fine
- * way to encourage a speculative access. So we cheat and flip the top
- * bit of the address. This works fine for the code that updates the
- * page tables. But at the end of the process we need to flush the cache
- * and the non-canonical address causes a #GP fault when used by the
- * CLFLUSH instruction.
- *
- * But in the common case we already have a canonical address. This code
- * will fix the top bit if needed and is a no-op otherwise.
- */
-static inline unsigned long make_addr_canonical_again(unsigned long addr)
-{
-#ifdef CONFIG_X86_64
-	return (long)(addr << 1) >> 1;
-#else
-	return addr;
-#endif
-}
-
-
 static int change_page_attr_set_clr(unsigned long *addr, int numpages,
 				    pgprot_t mask_set, pgprot_t mask_clr,
 				    int force_split, int in_flag,