[PATCH 08/10] x86/cpufeature: Kill cpu_has_pat

Borislav Petkov
2016-03-29T15:44:33Z

From: Borislav Petkov <bp@suse.de>

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: intel-gfx@lists.freedesktop.org
---

@tip guys, the pat_bsp_init() and pat_ap_init() hunk will conflict with

d63dcf49cf5a ("x86/mm/pat: Replace cpu_has_pat with boot_cpu_has()")

in tip/x86:mm. Let me know how you wanna handle it. Or you can simply
delete those hunks below when applying after merging the above branch.
Or I can send this patch later... Yadda yadda.

arch/x86/include/asm/cpufeature.h | 1 -
arch/x86/mm/pat.c | 4 ++--
drivers/gpu/drm/i915/i915_gem.c | 2 +-
3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 5e02bc2e8444..ad480c5fb27c 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -128,7 +128,6 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
#define cpu_has_aes boot_cpu_has(X86_FEATURE_AES)
#define cpu_has_avx boot_cpu_has(X86_FEATURE_AVX)
#define cpu_has_avx2 boot_cpu_has(X86_FEATURE_AVX2)
-#define cpu_has_pat boot_cpu_has(X86_FEATURE_PAT)
#define cpu_has_xsave boot_cpu_has(X86_FEATURE_XSAVE)
#define cpu_has_xsaves boot_cpu_has(X86_FEATURE_XSAVES)
/*
diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c
index faec01e7a17d..6df20ac83ec3 100644
--- a/arch/x86/mm/pat.c
+++ b/arch/x86/mm/pat.c
@@ -202,7 +202,7 @@ static void pat_bsp_init(u64 pat)
{
u64 tmp_pat;

- if (!cpu_has_pat) {
+ if (!boot_cpu_has(X86_FEATURE_PAT)) {
pat_disable("PAT not supported by CPU.");
return;
}
@@ -227,7 +227,7 @@ static void pat_ap_init(u64 pat)
if (!pat_enabled())
return;

- if (!cpu_has_pat) {
+ if (!boot_cpu_has(X86_FEATURE_PAT)) {
/*
* If this happens we are on a secondary CPU, but switched to
* PAT on the boot CPU. We have no way to undo PAT.
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 3d31d3ac589e..aaec8aef9fd4 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1732,7 +1732,7 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
if (args->flags & ~(I915_MMAP_WC))
return -EINVAL;

- if (args->flags & I915_MMAP_WC && !cpu_has_pat)
+ if (args->flags & I915_MMAP_WC && !boot_cpu_has(X86_FEATURE_PAT))
return -ENODEV;

obj = drm_gem_object_lookup(dev, file, args->handle);
--
2.7.3