Re: [PATCH v7 04/10] KVM: VMX: Move MSR_IA32_VMX_BASIC bit defines to asm/vmx.h

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On 5/21/2024 1:59 AM, Sean Christopherson wrote:
From: Xin Li <xin3.li@xxxxxxxxx>

Move the bit defines for MSR_IA32_VMX_BASIC from msr-index.h to vmx.h so
that they are colocated with other VMX MSR bit defines, and with the
helpers that extract specific information from an MSR_IA32_VMX_BASIC value.

Opportunistically use BIT_ULL() instead of open coding hex values.

Opportunistically rename VMX_BASIC_64 to VMX_BASIC_32BIT_PHYS_ADDR_ONLY,
as "VMX_BASIC_64" is widly misleading.  The flag enumerates that addresses
are limited to 32 bits, not that 64-bit addresses are allowed.

Cc: Shan Kang <shan.kang@xxxxxxxxx>
Cc: Kai Huang <kai.huang@xxxxxxxxx>
Signed-off-by: Xin Li <xin3.li@xxxxxxxxx>
[sean: split to separate patch, write changelog]
Reviewed-by: Zhao Liu <zhao1.liu@xxxxxxxxx>
Reviewed-by: Kai Huang <kai.huang@xxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
  arch/x86/include/asm/msr-index.h | 8 --------
  arch/x86/include/asm/vmx.h       | 7 +++++++
  2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index b14434af00df..7e7cad59e552 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -1168,14 +1168,6 @@
  #define MSR_IA32_VMX_VMFUNC             0x00000491
  #define MSR_IA32_VMX_PROCBASED_CTLS3	0x00000492
-/* VMX_BASIC bits and bitmasks */
-#define VMX_BASIC_VMCS_SIZE_SHIFT	32
-#define VMX_BASIC_TRUE_CTLS		(1ULL << 55)
-#define VMX_BASIC_64		0x0001000000000000LLU
-#define VMX_BASIC_MEM_TYPE_SHIFT	50

-#define VMX_BASIC_MEM_TYPE_MASK	0x003c000000000000LLU

VMX_BASIC_MEM_TYPE_MASK	gets deleted. It deserves to be mentioned?

-#define VMX_BASIC_INOUT		0x0040000000000000LLU
-
  /* Resctrl MSRs: */
  /* - Intel: */
  #define MSR_IA32_L3_QOS_CFG		0xc81
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index e531d8d80a11..81b986e501a9 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -135,6 +135,13 @@
  #define VMX_VMFUNC_EPTP_SWITCHING               VMFUNC_CONTROL_BIT(EPTP_SWITCHING)
  #define VMFUNC_EPTP_ENTRIES  512
+#define VMX_BASIC_VMCS_SIZE_SHIFT 32
+#define VMX_BASIC_32BIT_PHYS_ADDR_ONLY		BIT_ULL(48)
+#define VMX_BASIC_DUAL_MONITOR_TREATMENT	BIT_ULL(49)

why add it?

+#define VMX_BASIC_MEM_TYPE_SHIFT		50
+#define VMX_BASIC_INOUT				BIT_ULL(54)
+#define VMX_BASIC_TRUE_CTLS			BIT_ULL(55)
+
  static inline u32 vmx_basic_vmcs_revision_id(u64 vmx_basic)
  {
  	return vmx_basic & GENMASK_ULL(30, 0);





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