accel/tcg: Introduce tlb_set_page_full

Now that we have collected all of the page data into
CPUTLBEntryFull, provide an interface to record that
all in one go, instead of using 4 arguments.  This interface
allows CPUTLBEntryFull to be extended without having to
change the number of arguments.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 33 insertions, 18 deletions

diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index e3ee4260bd..361078471b 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -1095,16 +1095,16 @@ static void tlb_add_large_page(CPUArchState *env, int mmu_idx,
     env_tlb(env)->d[mmu_idx].large_page_mask = lp_mask;
 }
 
-/* Add a new TLB entry. At most one entry for a given virtual address
+/*
+ * Add a new TLB entry. At most one entry for a given virtual address
  * is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
  * supplied size is only used by tlb_flush_page.
  *
  * Called from TCG-generated code, which is under an RCU read-side
  * critical section.
  */
-void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
-                             hwaddr paddr, MemTxAttrs attrs, int prot,
-                             int mmu_idx, target_ulong size)
+void tlb_set_page_full(CPUState *cpu, int mmu_idx,
+                       target_ulong vaddr, CPUTLBEntryFull *full)
 {
     CPUArchState *env = cpu->env_ptr;
     CPUTLB *tlb = env_tlb(env);
@@ -1117,35 +1117,36 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
     CPUTLBEntry *te, tn;
     hwaddr iotlb, xlat, sz, paddr_page;
     target_ulong vaddr_page;
-    int asidx = cpu_asidx_from_attrs(cpu, attrs);
-    int wp_flags;
+    int asidx, wp_flags, prot;
     bool is_ram, is_romd;
 
     assert_cpu_is_self(cpu);
 
-    if (size <= TARGET_PAGE_SIZE) {
+    if (full->lg_page_size <= TARGET_PAGE_BITS) {
         sz = TARGET_PAGE_SIZE;
     } else {
-        tlb_add_large_page(env, mmu_idx, vaddr, size);
-        sz = size;
+        sz = (hwaddr)1 << full->lg_page_size;
+        tlb_add_large_page(env, mmu_idx, vaddr, sz);
     }
     vaddr_page = vaddr & TARGET_PAGE_MASK;
-    paddr_page = paddr & TARGET_PAGE_MASK;
+    paddr_page = full->phys_addr & TARGET_PAGE_MASK;
 
+    prot = full->prot;
+    asidx = cpu_asidx_from_attrs(cpu, full->attrs);
     section = address_space_translate_for_iotlb(cpu, asidx, paddr_page,
-                                                &xlat, &sz, attrs, &prot);
+                                                &xlat, &sz, full->attrs, &prot);
     assert(sz >= TARGET_PAGE_SIZE);
 
     tlb_debug("vaddr=" TARGET_FMT_lx " paddr=0x" TARGET_FMT_plx
               " prot=%x idx=%d\n",
-              vaddr, paddr, prot, mmu_idx);
+              vaddr, full->phys_addr, prot, mmu_idx);
 
     address = vaddr_page;
-    if (size < TARGET_PAGE_SIZE) {
+    if (full->lg_page_size < TARGET_PAGE_BITS) {
         /* Repeat the MMU check and TLB fill on every access.  */
         address |= TLB_INVALID_MASK;
     }
-    if (attrs.byte_swap) {
+    if (full->attrs.byte_swap) {
         address |= TLB_BSWAP;
     }
 
@@ -1236,8 +1237,10 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
      * subtract here is that of the page base, and not the same as the
      * vaddr we add back in io_readx()/io_writex()/get_page_addr_code().
      */
+    desc->fulltlb[index] = *full;
     desc->fulltlb[index].xlat_section = iotlb - vaddr_page;
-    desc->fulltlb[index].attrs = attrs;
+    desc->fulltlb[index].phys_addr = paddr_page;
+    desc->fulltlb[index].prot = prot;
 
     /* Now calculate the new entry */
     tn.addend = addend - vaddr_page;
@@ -1272,9 +1275,21 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
     qemu_spin_unlock(&tlb->c.lock);
 }
 
-/* Add a new TLB entry, but without specifying the memory
- * transaction attributes to be used.
- */
+void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
+                             hwaddr paddr, MemTxAttrs attrs, int prot,
+                             int mmu_idx, target_ulong size)
+{
+    CPUTLBEntryFull full = {
+        .phys_addr = paddr,
+        .attrs = attrs,
+        .prot = prot,
+        .lg_page_size = ctz64(size)
+    };
+
+    assert(is_power_of_2(size));
+    tlb_set_page_full(cpu, mmu_idx, vaddr, &full);
+}
+
 void tlb_set_page(CPUState *cpu, target_ulong vaddr,
                   hwaddr paddr, int prot,
                   int mmu_idx, target_ulong size)