[PATCH v8 09/10] KVM: VMX: Open code VMX preemption timer rate mask in its accessor

Sean Christopherson
2024-06-05T23:19:39Z

From: Xin Li <xin3.li@intel.com>

Use vmx_misc_preemption_timer_rate() to get the rate in hardware_setup(),
and open code the rate's bitmask in vmx_misc_preemption_timer_rate() so
that the function looks like all the helpers that grab values from
VMX_BASIC and VMX_MISC MSR values.

No functional change intended.

Cc: Shan Kang <shan.kang@intel.com>
Cc: Kai Huang <kai.huang@intel.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
[sean: split to separate patch, write changelog]
Reviewed-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/include/asm/vmx.h | 3 +--
arch/x86/kvm/vmx/vmx.c | 2 +-
2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 400819ccb42c..f7fd4369b821 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -153,7 +153,6 @@ static inline u64 vmx_basic_encode_vmcs_info(u32 revision, u16 size, u8 memtype)
return revision | ((u64)size << 32) | ((u64)memtype << 50);
}

-#define VMX_MISC_PREEMPTION_TIMER_RATE_MASK GENMASK_ULL(4, 0)
#define VMX_MISC_SAVE_EFER_LMA BIT_ULL(5)
#define VMX_MISC_ACTIVITY_HLT BIT_ULL(6)
#define VMX_MISC_ACTIVITY_SHUTDOWN BIT_ULL(7)
@@ -167,7 +166,7 @@ static inline u64 vmx_basic_encode_vmcs_info(u32 revision, u16 size, u8 memtype)

static inline int vmx_misc_preemption_timer_rate(u64 vmx_misc)
{
- return vmx_misc & VMX_MISC_PREEMPTION_TIMER_RATE_MASK;
+ return vmx_misc & GENMASK_ULL(4, 0);
}

static inline int vmx_misc_cr3_count(u64 vmx_misc)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 3141ef8679e2..69865e7a3506 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -8536,7 +8536,7 @@ __init int vmx_hardware_setup(void)
u64 use_timer_freq = 5000ULL * 1000 * 1000;

cpu_preemption_timer_multi =
- vmcs_config.misc & VMX_MISC_PREEMPTION_TIMER_RATE_MASK;
+ vmx_misc_preemption_timer_rate(vmcs_config.misc);

if (tsc_khz)
use_timer_freq = (u64)tsc_khz * 1000;
--
2.45.1.467.gbab1589fc0-goog