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From: Frantisek Hrbata <fhrbata@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, tglx@linutronix.de, mingo@redhat.com,
	hpa@zytor.com, x86@kernel.org, oleg@redhat.com,
	kamaleshb@in.ibm.com, hechjie@cn.ibm.com,
	akpm@linux-foundation.org, dave.hansen@intel.com,
	dvlasenk@redhat.com, prarit@redhat.com, lwoodman@redhat.com,
	hannsj_uhl@de.ibm.com
Subject: [PATCH V2 1/2] x86: add arch_pfn_possible helper
Date: Fri, 15 Aug 2014 13:44:02 +0200	[thread overview]
Message-ID: <1408103043-31015-2-git-send-email-fhrbata@redhat.com> (raw)
In-Reply-To: <1408103043-31015-1-git-send-email-fhrbata@redhat.com>

Add helper to check maximum possible pfn on x86. Also make the current
phys_addr_valid helper using it internally.

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
---
 arch/x86/mm/physaddr.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/physaddr.h b/arch/x86/mm/physaddr.h
index a3cd5a0..9df8e3a 100644
--- a/arch/x86/mm/physaddr.h
+++ b/arch/x86/mm/physaddr.h
@@ -1,10 +1,15 @@
 #include <asm/processor.h>
 
-static inline int phys_addr_valid(resource_size_t addr)
+static inline int arch_pfn_possible(unsigned long pfn)
 {
 #ifdef CONFIG_PHYS_ADDR_T_64BIT
-	return !(addr >> boot_cpu_data.x86_phys_bits);
+	return !(pfn >> (boot_cpu_data.x86_phys_bits - PAGE_SHIFT));
 #else
 	return 1;
 #endif
 }
+
+static inline int phys_addr_valid(resource_size_t addr)
+{
+	return arch_pfn_possible(addr >> PAGE_SHIFT);
+}
-- 
1.9.3


WARNING: multiple messages have this Message-ID (diff)
From: Frantisek Hrbata <fhrbata@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: linux-mm@kvack.org, tglx@linutronix.de, mingo@redhat.com,
	hpa@zytor.com, x86@kernel.org, oleg@redhat.com,
	kamaleshb@in.ibm.com, hechjie@cn.ibm.com,
	akpm@linux-foundation.org, dave.hansen@intel.com,
	dvlasenk@redhat.com, prarit@redhat.com, lwoodman@redhat.com,
	hannsj_uhl@de.ibm.com
Subject: [PATCH V2 1/2] x86: add arch_pfn_possible helper
Date: Fri, 15 Aug 2014 13:44:02 +0200	[thread overview]
Message-ID: <1408103043-31015-2-git-send-email-fhrbata@redhat.com> (raw)
In-Reply-To: <1408103043-31015-1-git-send-email-fhrbata@redhat.com>

Add helper to check maximum possible pfn on x86. Also make the current
phys_addr_valid helper using it internally.

Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
---
 arch/x86/mm/physaddr.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/x86/mm/physaddr.h b/arch/x86/mm/physaddr.h
index a3cd5a0..9df8e3a 100644
--- a/arch/x86/mm/physaddr.h
+++ b/arch/x86/mm/physaddr.h
@@ -1,10 +1,15 @@
 #include <asm/processor.h>
 
-static inline int phys_addr_valid(resource_size_t addr)
+static inline int arch_pfn_possible(unsigned long pfn)
 {
 #ifdef CONFIG_PHYS_ADDR_T_64BIT
-	return !(addr >> boot_cpu_data.x86_phys_bits);
+	return !(pfn >> (boot_cpu_data.x86_phys_bits - PAGE_SHIFT));
 #else
 	return 1;
 #endif
 }
+
+static inline int phys_addr_valid(resource_size_t addr)
+{
+	return arch_pfn_possible(addr >> PAGE_SHIFT);
+}
-- 
1.9.3

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  reply	other threads:[~2014-08-15 11:44 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-08-14 14:18 [PATCH 0/1] Prevent possible PTE corruption with /dev/mem mmap Frantisek Hrbata
2014-08-14 14:18 ` Frantisek Hrbata
2014-08-14 14:18 ` [PATCH 1/1] x86: add phys addr validity check for " Frantisek Hrbata
2014-08-14 14:18   ` Frantisek Hrbata
2014-08-14 16:36   ` Dave Hansen
2014-08-14 16:36     ` Dave Hansen
2014-08-14 17:20     ` H. Peter Anvin
2014-08-14 17:20       ` H. Peter Anvin
2014-08-14 17:53       ` Frantisek Hrbata
2014-08-14 17:53         ` Frantisek Hrbata
2014-08-14 17:40     ` Frantisek Hrbata
2014-08-14 17:40       ` Frantisek Hrbata
2014-08-15 10:17   ` Frantisek Hrbata
2014-08-15 10:17     ` Frantisek Hrbata
2014-08-15 11:44 ` [PATCH V2 0/2] Prevent possible PTE corruption with " Frantisek Hrbata
2014-08-15 11:44   ` Frantisek Hrbata
2014-08-15 11:44   ` Frantisek Hrbata [this message]
2014-08-15 11:44     ` [PATCH V2 1/2] x86: add arch_pfn_possible helper Frantisek Hrbata
2014-08-15 11:44   ` [PATCH V2 2/2] x86: add phys addr validity check for /dev/mem mmap Frantisek Hrbata
2014-08-15 11:44     ` Frantisek Hrbata
2014-08-15 18:10     ` Dave Hansen
2014-08-15 18:10       ` Dave Hansen
2014-08-18 11:26       ` Frantisek Hrbata
2014-08-18 11:26         ` Frantisek Hrbata
2014-08-20 15:25   ` [PATCH 0/2] x86: allow read/write /dev/mem to access non-system RAM above high_memory Frantisek Hrbata
2014-08-20 15:25     ` Frantisek Hrbata
2014-08-20 15:25     ` [PATCH 1/2] x86: add high_memory check to (xlate|unxlate)_dev_mem_ptr Frantisek Hrbata
2014-08-20 15:25       ` Frantisek Hrbata
2014-08-20 15:25     ` [PATCH 2/2] x86: remove high_memory check from valid_phys_addr_range Frantisek Hrbata
2014-08-20 15:25       ` Frantisek Hrbata

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