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target/i386: move paging mode constants from SVM to cpu.h 

We will reuse the page walker for both SVM and regular accesses.  To do
so we will build a function that receives the currently active paging
mode; start by including in cpu.h the constants and the function to go
from cr4/hflags/efer to the paging mode.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-02-26 09:45:05 -05:00
parent 6ed6b0d380
commit 616a89eaad
4 changed files with 31 additions and 21 deletions
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8
target/i386/cpu.h
View File

@ -303,6 +303,11 @@ typedef enum X86Seg {
#define PG_ERROR_I_D_MASK 0x10
#define PG_ERROR_PK_MASK 0x20
#define PG_MODE_PAE (1 << 0)
#define PG_MODE_LMA (1 << 1)
#define PG_MODE_NXE (1 << 2)
#define PG_MODE_PSE (1 << 3)
#define MCG_CTL_P (1ULL<<8) /* MCG_CAP register available */
#define MCG_SER_P (1ULL<<24) /* MCA recovery/new status bits */
#define MCG_LMCE_P (1ULL<<27) /* Local Machine Check Supported */
@ -2105,6 +2110,9 @@ static inline bool cpu_vmx_maybe_enabled(CPUX86State *env)
((env->cr[4] & CR4_VMXE_MASK) || (env->hflags & HF_SMM_MASK));
}
/* excp_helper.c */
int get_pg_mode(CPUX86State *env);
/* fpu_helper.c */
void update_fp_status(CPUX86State *env);
void update_mxcsr_status(CPUX86State *env);

5
target/i386/svm.h
View File

@ -132,11 +132,6 @@
#define SVM_NPT_ENABLED (1 << 0)
#define SVM_NPT_PAE (1 << 0)
#define SVM_NPT_LMA (1 << 1)
#define SVM_NPT_NXE (1 << 2)
#define SVM_NPT_PSE (1 << 3)
#define SVM_NPTEXIT_GPA (1ULL << 32)
#define SVM_NPTEXIT_GPT (1ULL << 33)

26
target/i386/tcg/sysemu/excp_helper.c
View File

@ -21,6 +21,24 @@
#include "cpu.h"
#include "tcg/helper-tcg.h"
int get_pg_mode(CPUX86State *env)
{
int pg_mode = 0;
if (env->cr[4] & CR4_PAE_MASK) {
pg_mode |= PG_MODE_PAE;
}
if (env->cr[4] & CR4_PSE_MASK) {
pg_mode |= PG_MODE_PSE;
}
if (env->hflags & HF_LMA_MASK) {
pg_mode |= PG_MODE_LMA;
}
if (env->efer & MSR_EFER_NXE) {
pg_mode |= PG_MODE_NXE;
}
return pg_mode;
}
static hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type,
int *prot)
{
@ -37,16 +55,16 @@ static hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type,
return gphys;
}
if (!(env->nested_pg_mode & SVM_NPT_NXE)) {
if (!(env->nested_pg_mode & PG_MODE_NXE)) {
rsvd_mask |= PG_NX_MASK;
}
if (env->nested_pg_mode & SVM_NPT_PAE) {
if (env->nested_pg_mode & PG_MODE_PAE) {
uint64_t pde, pdpe;
target_ulong pdpe_addr;
#ifdef TARGET_X86_64
if (env->nested_pg_mode & SVM_NPT_LMA) {
if (env->nested_pg_mode & PG_MODE_LMA) {
uint64_t pml5e;
uint64_t pml4e_addr, pml4e;
@ -147,7 +165,7 @@ static hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type,
ptep = pde | PG_NX_MASK;
/* if host cr4 PSE bit is set, then we use a 4MB page */
if ((pde & PG_PSE_MASK) && (env->nested_pg_mode & SVM_NPT_PSE)) {
if ((pde & PG_PSE_MASK) && (env->nested_pg_mode & PG_MODE_PSE)) {
page_size = 4096 * 1024;
pte_addr = pde_addr;

13
target/i386/tcg/sysemu/svm_helper.c
View File

@ -163,18 +163,7 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
control.nested_cr3));
env->hflags2 |= HF2_NPT_MASK;
if (env->cr[4] & CR4_PAE_MASK) {
env->nested_pg_mode |= SVM_NPT_PAE;
}
if (env->cr[4] & CR4_PSE_MASK) {
env->nested_pg_mode |= SVM_NPT_PSE;
}
if (env->hflags & HF_LMA_MASK) {
env->nested_pg_mode |= SVM_NPT_LMA;
}
if (env->efer & MSR_EFER_NXE) {
env->nested_pg_mode |= SVM_NPT_NXE;
}
env->nested_pg_mode = get_pg_mode(env);
}
/* enable intercepts */