diff mbox series

[kvm-unit-tests,v2,1/4] x86: Use existing CR0.WP / CR4.SMEP bit definitions

Message ID 20230331135709.132713-2-minipli@grsecurity.net (mailing list archive)
State New, archived
Headers show
Series Tests for CR0.WP=0/1 r/o write access | expand

Commit Message

Mathias Krause March 31, 2023, 1:57 p.m. UTC 
Use the existing bit definitions from x86/processor.h instead of
defining our own.

Signed-off-by: Mathias Krause <minipli@grsecurity.net>
---
 x86/access.c | 11 ++++-------
 x86/pks.c    |  5 ++---
 x86/pku.c    |  5 ++---
 3 files changed, 8 insertions(+), 13 deletions(-)

Comments

Sean Christopherson March 31, 2023, 4:02 p.m. UTC | #1 
On Fri, Mar 31, 2023, Mathias Krause wrote:
> Use the existing bit definitions from x86/processor.h instead of
> defining our own.

Please avoid pronouns.  E.g. in this case, "our" is really confusing because if
"our" mean KVM-Unit-Tests, then x86/processor.h is also "ours".

  defining one-off versions in individual tests.
diff mbox series

Patch

diff --git a/x86/access.c b/x86/access.c
index 4dfec23073f7..203353a3f74f 100644
--- a/x86/access.c
+++ b/x86/access.c
@@ -20,9 +20,6 @@  static int invalid_mask;
 #define PT_BASE_ADDR_MASK ((pt_element_t)((((pt_element_t)1 << 36) - 1) & PAGE_MASK))
 #define PT_PSE_BASE_ADDR_MASK (PT_BASE_ADDR_MASK & ~(1ull << 21))
 
-#define CR0_WP_MASK (1UL << 16)
-#define CR4_SMEP_MASK (1UL << 20)
-
 #define PFERR_PRESENT_MASK (1U << 0)
 #define PFERR_WRITE_MASK (1U << 1)
 #define PFERR_USER_MASK (1U << 2)
@@ -239,9 +236,9 @@  static void set_cr0_wp(int wp)
 {
 	unsigned long cr0 = shadow_cr0;
 
-	cr0 &= ~CR0_WP_MASK;
+	cr0 &= ~X86_CR0_WP;
 	if (wp)
-		cr0 |= CR0_WP_MASK;
+		cr0 |= X86_CR0_WP;
 	if (cr0 != shadow_cr0) {
 		write_cr0(cr0);
 		shadow_cr0 = cr0;
@@ -272,9 +269,9 @@  static unsigned set_cr4_smep(ac_test_t *at, int smep)
 	unsigned long cr4 = shadow_cr4;
 	unsigned r;
 
-	cr4 &= ~CR4_SMEP_MASK;
+	cr4 &= ~X86_CR4_SMEP;
 	if (smep)
-		cr4 |= CR4_SMEP_MASK;
+		cr4 |= X86_CR4_SMEP;
 	if (cr4 == shadow_cr4)
 		return 0;
 
diff --git a/x86/pks.c b/x86/pks.c
index ef95fb96c597..bda15efc546d 100644
--- a/x86/pks.c
+++ b/x86/pks.c
@@ -5,7 +5,6 @@ 
 #include "x86/vm.h"
 #include "x86/msr.h"
 
-#define CR0_WP_MASK      (1UL << 16)
 #define PTE_PKEY_BIT     59
 #define SUPER_BASE        (1 << 23)
 #define SUPER_VAR(v)      (*((__typeof__(&(v))) (((unsigned long)&v) + SUPER_BASE)))
@@ -18,9 +17,9 @@  static void set_cr0_wp(int wp)
 {
     unsigned long cr0 = read_cr0();
 
-    cr0 &= ~CR0_WP_MASK;
+    cr0 &= ~X86_CR0_WP;
     if (wp)
-        cr0 |= CR0_WP_MASK;
+        cr0 |= X86_CR0_WP;
     write_cr0(cr0);
 }
 
diff --git a/x86/pku.c b/x86/pku.c
index 51ff412cef82..6c0d72cc6f81 100644
--- a/x86/pku.c
+++ b/x86/pku.c
@@ -5,7 +5,6 @@ 
 #include "x86/vm.h"
 #include "x86/msr.h"
 
-#define CR0_WP_MASK      (1UL << 16)
 #define PTE_PKEY_BIT     59
 #define USER_BASE        (1 << 23)
 #define USER_VAR(v)      (*((__typeof__(&(v))) (((unsigned long)&v) + USER_BASE)))
@@ -18,9 +17,9 @@  static void set_cr0_wp(int wp)
 {
     unsigned long cr0 = read_cr0();
 
-    cr0 &= ~CR0_WP_MASK;
+    cr0 &= ~X86_CR0_WP;
     if (wp)
-        cr0 |= CR0_WP_MASK;
+        cr0 |= X86_CR0_WP;
     write_cr0(cr0);
 }