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Subject[PATCH 2/7] x86, xsave: introduce xstate enable functions
Date
The patch renames xsave_cntxt_init() and __xsave_init() into
xstate_enable_boot_cpu() and xstate_enable() as this names are more
meaningful.

It also removes the duplicate xcr setup for the boot cpu.

Signed-off-by: Robert Richter <robert.richter@amd.com>
---
arch/x86/kernel/xsave.c | 19 ++++++++-----------
1 files changed, 8 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c
index 550bf45..2322f58 100644
--- a/arch/x86/kernel/xsave.c
+++ b/arch/x86/kernel/xsave.c
@@ -360,15 +360,10 @@ unsigned int sig_xstate_size = sizeof(struct _fpstate);
/*
* Enable the extended processor state save/restore feature
*/
-static void __cpuinit __xsave_init(void)
+static inline void xstate_enable(u64 mask)
{
set_in_cr4(X86_CR4_OSXSAVE);
-
- /*
- * Enable all the features that the HW is capable of
- * and the Linux kernel is aware of.
- */
- xsetbv(XCR_XFEATURE_ENABLED_MASK, pcntxt_mask);
+ xsetbv(XCR_XFEATURE_ENABLED_MASK, mask);
}

/*
@@ -426,7 +421,7 @@ static void __init setup_xstate_init(void)
/*
* Enable and initialize the xsave feature.
*/
-static void __cpuinit xsave_cntxt_init(void)
+static void __cpuinit xstate_enable_boot_cpu(void)
{
unsigned int eax, ebx, ecx, edx;

@@ -443,7 +438,8 @@ static void __cpuinit xsave_cntxt_init(void)
* Support only the state known to OS.
*/
pcntxt_mask = pcntxt_mask & XCNTXT_MASK;
- __xsave_init();
+
+ xstate_enable(pcntxt_mask);

/*
* Recompute the context size for enabled features
@@ -470,6 +466,7 @@ void __cpuinit xsave_init(void)
* Boot processor to setup the FP and extended state context info.
*/
if (!smp_processor_id())
- xsave_cntxt_init();
- __xsave_init();
+ xstate_enable_boot_cpu();
+ else
+ xstate_enable(pcntxt_mask);
}
--
1.7.1.1



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