[PATCH v3 16/42] target/arm: Pass HCR to attribute subroutines.

[Richard Henderson <richard.henderson@linaro.org>]

These subroutines did not need ENV for anything except
retrieving the effective value of HCR anyway.

We have computed the effective value of HCR in the callers,
and this will be especially important for interpreting HCR
in a non-current security state.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/ptw.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/target/arm/ptw.c b/target/arm/ptw.c
index 2f0eeee161..a0dce9c313 100644
--- a/target/arm/ptw.c
+++ b/target/arm/ptw.c
@@ -186,7 +186,7 @@ static bool regime_translation_disabled(CPUARMState *env, ARMMMUIdx mmu_idx,
     return (regime_sctlr(env, mmu_idx) & SCTLR_M) == 0;
 }
 
-static bool ptw_attrs_are_device(CPUARMState *env, ARMCacheAttrs cacheattrs)
+static bool ptw_attrs_are_device(uint64_t hcr, ARMCacheAttrs cacheattrs)
 {
     /*
      * For an S1 page table walk, the stage 1 attributes are always
@@ -198,7 +198,7 @@ static bool ptw_attrs_are_device(CPUARMState *env, ARMCacheAttrs cacheattrs)
      * when cacheattrs.attrs bit [2] is 0.
      */
     assert(cacheattrs.is_s2_format);
-    if (arm_hcr_el2_eff(env) & HCR_FWB) {
+    if (hcr & HCR_FWB) {
         return (cacheattrs.attrs & 0x4) == 0;
     } else {
         return (cacheattrs.attrs & 0xc) == 0;
@@ -216,6 +216,7 @@ static hwaddr S1_ptw_translate(CPUARMState *env, ARMMMUIdx mmu_idx,
     if (arm_mmu_idx_is_stage1_of_2(mmu_idx) &&
         !regime_translation_disabled(env, s2_mmu_idx, is_secure)) {
         GetPhysAddrResult s2 = {};
+        uint64_t hcr;
         int ret;
 
         ret = get_phys_addr_lpae(env, addr, MMU_DATA_LOAD, s2_mmu_idx,
@@ -228,8 +229,9 @@ static hwaddr S1_ptw_translate(CPUARMState *env, ARMMMUIdx mmu_idx,
             fi->s1ns = !is_secure;
             return ~0;
         }
-        if ((arm_hcr_el2_eff(env) & HCR_PTW) &&
-            ptw_attrs_are_device(env, s2.cacheattrs)) {
+
+        hcr = arm_hcr_el2_eff(env);
+        if ((hcr & HCR_PTW) && ptw_attrs_are_device(hcr, s2.cacheattrs)) {
             /*
              * PTW set and S1 walk touched S2 Device memory:
              * generate Permission fault.
@@ -2059,14 +2061,14 @@ static bool get_phys_addr_pmsav8(CPUARMState *env, uint32_t address,
  * ref: shared/translation/attrs/S2AttrDecode()
  *      .../S2ConvertAttrsHints()
  */
-static uint8_t convert_stage2_attrs(CPUARMState *env, uint8_t s2attrs)
+static uint8_t convert_stage2_attrs(uint64_t hcr, uint8_t s2attrs)
 {
     uint8_t hiattr = extract32(s2attrs, 2, 2);
     uint8_t loattr = extract32(s2attrs, 0, 2);
     uint8_t hihint = 0, lohint = 0;
 
     if (hiattr != 0) { /* normal memory */
-        if (arm_hcr_el2_eff(env) & HCR_CD) { /* cache disabled */
+        if (hcr & HCR_CD) { /* cache disabled */
             hiattr = loattr = 1; /* non-cacheable */
         } else {
             if (hiattr != 1) { /* Write-through or write-back */
@@ -2112,12 +2114,12 @@ static uint8_t combine_cacheattr_nibble(uint8_t s1, uint8_t s2)
  * s1 and s2 for the HCR_EL2.FWB == 0 case, returning the
  * combined attributes in MAIR_EL1 format.
  */
-static uint8_t combined_attrs_nofwb(CPUARMState *env,
+static uint8_t combined_attrs_nofwb(uint64_t hcr,
                                     ARMCacheAttrs s1, ARMCacheAttrs s2)
 {
     uint8_t s1lo, s2lo, s1hi, s2hi, s2_mair_attrs, ret_attrs;
 
-    s2_mair_attrs = convert_stage2_attrs(env, s2.attrs);
+    s2_mair_attrs = convert_stage2_attrs(hcr, s2.attrs);
 
     s1lo = extract32(s1.attrs, 0, 4);
     s2lo = extract32(s2_mair_attrs, 0, 4);
@@ -2217,7 +2219,7 @@ static uint8_t combined_attrs_fwb(ARMCacheAttrs s1, ARMCacheAttrs s2)
  * @s1:      Attributes from stage 1 walk
  * @s2:      Attributes from stage 2 walk
  */
-static ARMCacheAttrs combine_cacheattrs(CPUARMState *env,
+static ARMCacheAttrs combine_cacheattrs(uint64_t hcr,
                                         ARMCacheAttrs s1, ARMCacheAttrs s2)
 {
     ARMCacheAttrs ret;
@@ -2244,10 +2246,10 @@ static ARMCacheAttrs combine_cacheattrs(CPUARMState *env,
     }
 
     /* Combine memory type and cacheability attributes */
-    if (arm_hcr_el2_eff(env) & HCR_FWB) {
+    if (hcr & HCR_FWB) {
         ret.attrs = combined_attrs_fwb(s1, s2);
     } else {
-        ret.attrs = combined_attrs_nofwb(env, s1, s2);
+        ret.attrs = combined_attrs_nofwb(hcr, s1, s2);
     }
 
     /*
@@ -2290,6 +2292,7 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
             ARMCacheAttrs cacheattrs1;
             ARMMMUIdx s2_mmu_idx;
             bool is_el0;
+            uint64_t hcr;
 
             ret = get_phys_addr_with_secure(env, address, access_type,
                                             s1_mmu_idx, is_secure, result, fi);
@@ -2338,7 +2341,8 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
             }
 
             /* Combine the S1 and S2 cache attributes. */
-            if (arm_hcr_el2_eff(env) & HCR_DC) {
+            hcr = arm_hcr_el2_eff(env);
+            if (hcr & HCR_DC) {
                 /*
                  * HCR.DC forces the first stage attributes to
                  *  Normal Non-Shareable,
@@ -2351,7 +2355,7 @@ bool get_phys_addr_with_secure(CPUARMState *env, target_ulong address,
                 }
                 cacheattrs1.shareability = 0;
             }
-            result->cacheattrs = combine_cacheattrs(env, cacheattrs1,
+            result->cacheattrs = combine_cacheattrs(hcr, cacheattrs1,
                                                     result->cacheattrs);
 
             /* Check if IPA translates to secure or non-secure PA space. */
-- 
2.34.1