Merge branch 'x86/mm' into efi/core

This commit in x86/mm changed EFI code: 116fef6: x86/mm/dump_pagetables: Add the EFI pagetable to the debugfs 'page_tables' directory So merge in that commit plus its dependencies, before continuing with EFI work. Signed-off-by: Ingo Molnar <mingo@kernel.org>
mariux64 · Mar 12, 2018 · b0599e2 · b0599e2
2 parents f779ca7 + 116fef6
commit b0599e2
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Showing 7 changed files with 611 additions and 584 deletions.
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h
@@ -22,6 +22,7 @@
 #ifdef CONFIG_AMD_MEM_ENCRYPT
 
 extern u64 sme_me_mask;
+extern bool sev_enabled;
 
 void sme_encrypt_execute(unsigned long encrypted_kernel_vaddr,
 			 unsigned long decrypted_kernel_vaddr,

diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
@@ -1,12 +1,15 @@
 # SPDX-License-Identifier: GPL-2.0
-# Kernel does not boot with instrumentation of tlb.c and mem_encrypt.c
-KCOV_INSTRUMENT_tlb.o		:= n
-KCOV_INSTRUMENT_mem_encrypt.o	:= n
+# Kernel does not boot with instrumentation of tlb.c and mem_encrypt*.c
+KCOV_INSTRUMENT_tlb.o			:= n
+KCOV_INSTRUMENT_mem_encrypt.o		:= n
+KCOV_INSTRUMENT_mem_encrypt_identity.o	:= n
 
-KASAN_SANITIZE_mem_encrypt.o	:= n
+KASAN_SANITIZE_mem_encrypt.o		:= n
+KASAN_SANITIZE_mem_encrypt_identity.o	:= n
 
 ifdef CONFIG_FUNCTION_TRACER
-CFLAGS_REMOVE_mem_encrypt.o	= -pg
+CFLAGS_REMOVE_mem_encrypt.o		= -pg
+CFLAGS_REMOVE_mem_encrypt_identity.o	= -pg
 endif
 
 obj-y	:=  init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \
@@ -47,4 +50,5 @@ obj-$(CONFIG_RANDOMIZE_MEMORY)			+= kaslr.o
 obj-$(CONFIG_PAGE_TABLE_ISOLATION)		+= pti.o
 
 obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt.o
+obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt_identity.o
 obj-$(CONFIG_AMD_MEM_ENCRYPT)	+= mem_encrypt_boot.o
diff --git a/arch/x86/mm/debug_pagetables.c b/arch/x86/mm/debug_pagetables.c
@@ -72,6 +72,31 @@ static const struct file_operations ptdump_curusr_fops = {
 };
 #endif
 
+#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
+extern pgd_t *efi_pgd;
+static struct dentry *pe_efi;
+
+static int ptdump_show_efi(struct seq_file *m, void *v)
+{
+	if (efi_pgd)
+		ptdump_walk_pgd_level_debugfs(m, efi_pgd, false);
+	return 0;
+}
+
+static int ptdump_open_efi(struct inode *inode, struct file *filp)
+{
+	return single_open(filp, ptdump_show_efi, NULL);
+}
+
+static const struct file_operations ptdump_efi_fops = {
+	.owner		= THIS_MODULE,
+	.open		= ptdump_open_efi,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+#endif
+
 static struct dentry *dir, *pe_knl, *pe_curknl;
 
 static int __init pt_dump_debug_init(void)
@@ -96,6 +121,13 @@ static int __init pt_dump_debug_init(void)
 	if (!pe_curusr)
 		goto err;
 #endif
+
+#if defined(CONFIG_EFI) && defined(CONFIG_X86_64)
+	pe_efi = debugfs_create_file("efi", 0400, dir, NULL, &ptdump_efi_fops);
+	if (!pe_efi)
+		goto err;
+#endif
+
 	return 0;
 err:
 	debugfs_remove_recursive(dir);