lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Fri, 12 Jun 2015 18:01:45 -0700
From:	"Jonathan (Zhixiong) Zhang" <>
To:	Matt Fleming <>,
	Thomas Gleixner <>,
	Ingo Molnar <>,
	"H. Peter Anvin" <>,,,,,
Cc:	"Jonathan (Zhixiong) Zhang" <>,,
Subject: [PATCH V4 2/4] x86: acpi: add arch_apei_get_mem_attributes()

From: "Jonathan (Zhixiong) Zhang" <>

... to allow arch specific implementation of getting page
protection type associated with a physical address.

If the physical address has memory attributes defined by EFI
memmap as EFI_MEMORY_UC, the page protection type is
PAGE_KENERL_NOCACHE. Otherwise, the page protection type is

Signed-off-by: Jonathan (Zhixiong) Zhang <>
 arch/x86/kernel/acpi/apei.c | 10 ++++++++++
 include/acpi/apei.h         |  1 +
 2 files changed, 11 insertions(+)

diff --git a/arch/x86/kernel/acpi/apei.c b/arch/x86/kernel/acpi/apei.c
index c280df6b2aa2..cfcde9142b94 100644
--- a/arch/x86/kernel/acpi/apei.c
+++ b/arch/x86/kernel/acpi/apei.c
@@ -14,6 +14,8 @@
 #include <acpi/apei.h>
+#include <linux/efi.h>
 #include <asm/mce.h>
 #include <asm/tlbflush.h>
@@ -60,3 +62,11 @@ void arch_apei_flush_tlb_one(unsigned long addr)
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
+	if (efi_mem_attributes(addr) & EFI_MEMORY_UC)
+	else
+		return PAGE_KERNEL;
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
index 76284bb560a6..4dd8c490e24f 100644
--- a/include/acpi/apei.h
+++ b/include/acpi/apei.h
@@ -45,6 +45,7 @@ int erst_clear(u64 record_id);
 int arch_apei_enable_cmcff(struct acpi_hest_header *hest_hdr, void *data);
 void arch_apei_report_mem_error(int sev, struct cper_sec_mem_err *mem_err);
 void arch_apei_flush_tlb_one(unsigned long addr);
+pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr);
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists