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[PATCH v1 1/3] hvf: use standard CR0 and CR4 register definitions


From: Cameron Esfahani
Subject: [PATCH v1 1/3] hvf: use standard CR0 and CR4 register definitions
Date: Mon, 30 Mar 2020 17:16:04 -0700

Signed-off-by: Cameron Esfahani <address@hidden>
---
 target/i386/cpu.h          |  2 ++
 target/i386/hvf/hvf.c      |  1 +
 target/i386/hvf/vmx.h      | 15 ++++++++-------
 target/i386/hvf/x86.c      |  6 +++---
 target/i386/hvf/x86.h      | 34 ----------------------------------
 target/i386/hvf/x86_mmu.c  |  2 +-
 target/i386/hvf/x86_task.c |  3 ++-
 7 files changed, 17 insertions(+), 46 deletions(-)

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 60d797d594..1286ec6e7a 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -225,6 +225,8 @@ typedef enum X86Seg {
 #define CR0_NE_MASK  (1U << 5)
 #define CR0_WP_MASK  (1U << 16)
 #define CR0_AM_MASK  (1U << 18)
+#define CR0_NW_MASK  (1U << 29)
+#define CR0_CD_MASK  (1U << 30)
 #define CR0_PG_MASK  (1U << 31)
 
 #define CR4_VME_MASK  (1U << 0)
diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
index d72543dc31..fef1ee7d70 100644
--- a/target/i386/hvf/hvf.c
+++ b/target/i386/hvf/hvf.c
@@ -455,6 +455,7 @@ void hvf_reset_vcpu(CPUState *cpu) {
         wvmcs(cpu->hvf_fd, VMCS_GUEST_PDPTE0 + i * 2, pdpte[i]);
     }
 
+    macvm_set_cr0(cpu->hvf_fd, CR0_CD_MASK | CR0_NW_MASK | CR0_ET_MASK);
     macvm_set_cr0(cpu->hvf_fd, 0x60000010);
 
     wvmcs(cpu->hvf_fd, VMCS_CR4_MASK, CR4_VMXE_MASK);
diff --git a/target/i386/hvf/vmx.h b/target/i386/hvf/vmx.h
index 03d2c79b9c..8ec2e6414e 100644
--- a/target/i386/hvf/vmx.h
+++ b/target/i386/hvf/vmx.h
@@ -121,9 +121,10 @@ static inline void macvm_set_cr0(hv_vcpuid_t vcpu, 
uint64_t cr0)
     uint64_t pdpte[4] = {0, 0, 0, 0};
     uint64_t efer = rvmcs(vcpu, VMCS_GUEST_IA32_EFER);
     uint64_t old_cr0 = rvmcs(vcpu, VMCS_GUEST_CR0);
-    uint64_t mask = CR0_PG | CR0_CD | CR0_NW | CR0_NE | CR0_ET;
+    uint64_t mask = CR0_PG_MASK | CR0_CD_MASK | CR0_NW_MASK |
+                    CR0_NE_MASK | CR0_ET_MASK;
 
-    if ((cr0 & CR0_PG) && (rvmcs(vcpu, VMCS_GUEST_CR4) & CR4_PAE) &&
+    if ((cr0 & CR0_PG_MASK) && (rvmcs(vcpu, VMCS_GUEST_CR4) & CR4_PAE_MASK) &&
         !(efer & MSR_EFER_LME)) {
         address_space_read(&address_space_memory,
                            rvmcs(vcpu, VMCS_GUEST_CR3) & ~0x1f,
@@ -138,17 +139,17 @@ static inline void macvm_set_cr0(hv_vcpuid_t vcpu, 
uint64_t cr0)
     wvmcs(vcpu, VMCS_CR0_SHADOW, cr0);
 
     if (efer & MSR_EFER_LME) {
-        if (!(old_cr0 & CR0_PG) && (cr0 & CR0_PG)) {
+        if (!(old_cr0 & CR0_PG_MASK) && (cr0 & CR0_PG_MASK)) {
             enter_long_mode(vcpu, cr0, efer);
         }
-        if (/*(old_cr0 & CR0_PG) &&*/ !(cr0 & CR0_PG)) {
+        if (!(cr0 & CR0_PG_MASK)) {
             exit_long_mode(vcpu, cr0, efer);
         }
     }
 
     /* Filter new CR0 after we are finished examining it above. */
-    cr0 = (cr0 & ~(mask & ~CR0_PG));
-    wvmcs(vcpu, VMCS_GUEST_CR0, cr0 | CR0_NE | CR0_ET);
+    cr0 = (cr0 & ~(mask & ~CR0_PG_MASK));
+    wvmcs(vcpu, VMCS_GUEST_CR0, cr0 | CR0_NE_MASK | CR0_ET_MASK);
 
     hv_vcpu_invalidate_tlb(vcpu);
     hv_vcpu_flush(vcpu);
@@ -156,7 +157,7 @@ static inline void macvm_set_cr0(hv_vcpuid_t vcpu, uint64_t 
cr0)
 
 static inline void macvm_set_cr4(hv_vcpuid_t vcpu, uint64_t cr4)
 {
-    uint64_t guest_cr4 = cr4 | CR4_VMXE;
+    uint64_t guest_cr4 = cr4 | CR4_VMXE_MASK;
 
     wvmcs(vcpu, VMCS_GUEST_CR4, guest_cr4);
     wvmcs(vcpu, VMCS_CR4_SHADOW, cr4);
diff --git a/target/i386/hvf/x86.c b/target/i386/hvf/x86.c
index 3afcedc7fc..668c02de6e 100644
--- a/target/i386/hvf/x86.c
+++ b/target/i386/hvf/x86.c
@@ -119,7 +119,7 @@ bool x86_read_call_gate(struct CPUState *cpu, struct 
x86_call_gate *idt_desc,
 bool x86_is_protected(struct CPUState *cpu)
 {
     uint64_t cr0 = rvmcs(cpu->hvf_fd, VMCS_GUEST_CR0);
-    return cr0 & CR0_PE;
+    return cr0 & CR0_PE_MASK;
 }
 
 bool x86_is_real(struct CPUState *cpu)
@@ -150,13 +150,13 @@ bool x86_is_long64_mode(struct CPUState *cpu)
 bool x86_is_paging_mode(struct CPUState *cpu)
 {
     uint64_t cr0 = rvmcs(cpu->hvf_fd, VMCS_GUEST_CR0);
-    return cr0 & CR0_PG;
+    return cr0 & CR0_PG_MASK;
 }
 
 bool x86_is_pae_enabled(struct CPUState *cpu)
 {
     uint64_t cr4 = rvmcs(cpu->hvf_fd, VMCS_GUEST_CR4);
-    return cr4 & CR4_PAE;
+    return cr4 & CR4_PAE_MASK;
 }
 
 target_ulong linear_addr(struct CPUState *cpu, target_ulong addr, X86Seg seg)
diff --git a/target/i386/hvf/x86.h b/target/i386/hvf/x86.h
index c95d5b2116..bc0170b2a8 100644
--- a/target/i386/hvf/x86.h
+++ b/target/i386/hvf/x86.h
@@ -100,40 +100,6 @@ typedef struct x86_reg_flags {
     };
 } __attribute__ ((__packed__)) x86_reg_flags;
 
-typedef enum x86_reg_cr0 {
-    CR0_PE =            (1L << 0),
-    CR0_MP =            (1L << 1),
-    CR0_EM =            (1L << 2),
-    CR0_TS =            (1L << 3),
-    CR0_ET =            (1L << 4),
-    CR0_NE =            (1L << 5),
-    CR0_WP =            (1L << 16),
-    CR0_AM =            (1L << 18),
-    CR0_NW =            (1L << 29),
-    CR0_CD =            (1L << 30),
-    CR0_PG =            (1L << 31),
-} x86_reg_cr0;
-
-typedef enum x86_reg_cr4 {
-    CR4_VME =            (1L << 0),
-    CR4_PVI =            (1L << 1),
-    CR4_TSD =            (1L << 2),
-    CR4_DE  =            (1L << 3),
-    CR4_PSE =            (1L << 4),
-    CR4_PAE =            (1L << 5),
-    CR4_MSE =            (1L << 6),
-    CR4_PGE =            (1L << 7),
-    CR4_PCE =            (1L << 8),
-    CR4_OSFXSR =         (1L << 9),
-    CR4_OSXMMEXCPT =     (1L << 10),
-    CR4_VMXE =           (1L << 13),
-    CR4_SMXE =           (1L << 14),
-    CR4_FSGSBASE =       (1L << 16),
-    CR4_PCIDE =          (1L << 17),
-    CR4_OSXSAVE =        (1L << 18),
-    CR4_SMEP =           (1L << 20),
-} x86_reg_cr4;
-
 /* 16 bit Task State Segment */
 typedef struct x86_tss_segment16 {
     uint16_t link;
diff --git a/target/i386/hvf/x86_mmu.c b/target/i386/hvf/x86_mmu.c
index 65d4603dbf..8f38eccffc 100644
--- a/target/i386/hvf/x86_mmu.c
+++ b/target/i386/hvf/x86_mmu.c
@@ -130,7 +130,7 @@ static bool test_pt_entry(struct CPUState *cpu, struct 
gpt_translation *pt,
 
     uint32_t cr0 = rvmcs(cpu->hvf_fd, VMCS_GUEST_CR0);
     /* check protection */
-    if (cr0 & CR0_WP) {
+    if (cr0 & CR0_WP_MASK) {
         if (pt->write_access && !pte_write_access(pte)) {
             return false;
         }
diff --git a/target/i386/hvf/x86_task.c b/target/i386/hvf/x86_task.c
index 1daac6cc2b..5e41d09b89 100644
--- a/target/i386/hvf/x86_task.c
+++ b/target/i386/hvf/x86_task.c
@@ -174,7 +174,8 @@ void vmx_handle_task_switch(CPUState *cpu, 
x68_segment_selector tss_sel, int rea
         //ret = task_switch_16(cpu, tss_sel, old_tss_sel, old_tss_base, 
&next_tss_desc);
         VM_PANIC("task_switch_16");
 
-    macvm_set_cr0(cpu->hvf_fd, rvmcs(cpu->hvf_fd, VMCS_GUEST_CR0) | CR0_TS);
+    macvm_set_cr0(cpu->hvf_fd,
+                  rvmcs(cpu->hvf_fd, VMCS_GUEST_CR0) | CR0_TS_MASK);
     x86_segment_descriptor_to_vmx(cpu, tss_sel, &next_tss_desc, &vmx_seg);
     vmx_write_segment_descriptor(cpu, &vmx_seg, R_TR);
 
-- 
2.24.0




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