From mboxrd@z Thu Jan 1 00:00:00 1970 From: Huaitong Han Subject: [PATCH 06/10] x86/hvm: pkeys, add functions to get pkeys value from PTE Date: Mon, 16 Nov 2015 18:31:53 +0800 Message-ID: <1447669917-17939-7-git-send-email-huaitong.han@intel.com> References: <1447669917-17939-1-git-send-email-huaitong.han@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1447669917-17939-1-git-send-email-huaitong.han@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: jbeulich@suse.com, andrew.cooper3@citrix.com, jun.nakajima@intel.com, eddie.dong@intel.com, kevin.tian@intel.com, george.dunlap@eu.citrix.com, ian.jackson@eu.citrix.com, stefano.stabellini@eu.citrix.com, ian.campbell@citrix.com, wei.liu2@citrix.com, keir@xen.org Cc: Huaitong Han , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org This patch adds functions to get pkeys value from PTE. Signed-off-by: Huaitong Han diff --git a/xen/include/asm-x86/page.h b/xen/include/asm-x86/page.h index 87b3341..1cdbfc8 100644 --- a/xen/include/asm-x86/page.h +++ b/xen/include/asm-x86/page.h @@ -93,6 +93,13 @@ #define l3e_get_flags(x) (get_pte_flags((x).l3)) #define l4e_get_flags(x) (get_pte_flags((x).l4)) +/* Get pte pkeys (unsigned int). */ +#define l1e_get_pkeys(x) (get_pte_pkeys((x).l1)) +#define l2e_get_pkeys(x) (get_pte_pkeys((x).l2)) +#define l3e_get_pkeys(x) (get_pte_pkeys((x).l3)) +#define l4e_get_pkeys(x) (get_pte_pkeys((x).l4)) + + /* Construct an empty pte. */ #define l1e_empty() ((l1_pgentry_t) { 0 }) #define l2e_empty() ((l2_pgentry_t) { 0 }) diff --git a/xen/include/asm-x86/x86_64/page.h b/xen/include/asm-x86/x86_64/page.h index 19ab4d0..03418ba 100644 --- a/xen/include/asm-x86/x86_64/page.h +++ b/xen/include/asm-x86/x86_64/page.h @@ -134,6 +134,18 @@ typedef l4_pgentry_t root_pgentry_t; #define get_pte_flags(x) (((int)((x) >> 40) & ~0xFFF) | ((int)(x) & 0xFFF)) #define put_pte_flags(x) (((intpte_t)((x) & ~0xFFF) << 40) | ((x) & 0xFFF)) +/* +* Protection keys define a new 4-bit protection key field +* (PKEY) in bits 62:59 of leaf entries of the page tables. +* This corresponds to bit 22:19 of a 24-bit flags. +*/ +#define _PAGE_PKEY_BIT0 19 /* Protection Keys, bit 1/4 */ +#define _PAGE_PKEY_BIT1 20 /* Protection Keys, bit 2/4 */ +#define _PAGE_PKEY_BIT2 21 /* Protection Keys, bit 3/4 */ +#define _PAGE_PKEY_BIT3 22 /* Protection Keys, bit 4/4 */ + +#define get_pte_pkeys(x) ((int)(get_pte_flags(x) >> _PAGE_PKEY_BIT0) & 0xF) + /* Bit 23 of a 24-bit flag mask. This corresponds to bit 63 of a pte.*/ #define _PAGE_NX_BIT (1U<<23) -- 2.4.3