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cputlb: Move tlb_lock to CPUTLBCommon

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This is the first of several moves to reduce the size of the
CPU_COMMON_TLB macro and improve some locality of refernce.

Tested-by: Emilio G. Cota <cota@braap.org>
Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2018-10-23 03:57:11 +01:00
parent a2e002ff79
commit 53d284554c
2 changed files with 38 additions and 27 deletions
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48
accel/tcg/cputlb.c
View file

@ -78,7 +78,7 @@ void tlb_init(CPUState *cpu)
{
CPUArchState *env = cpu->env_ptr;
qemu_spin_init(&env->tlb_lock);
qemu_spin_init(&env->tlb_c.lock);
}
/* flush_all_helper: run fn across all cpus
@ -134,15 +134,15 @@ static void tlb_flush_nocheck(CPUState *cpu)
tlb_debug("(count: %zu)\n", tlb_flush_count());
/*
* tlb_table/tlb_v_table updates from any thread must hold tlb_lock.
* tlb_table/tlb_v_table updates from any thread must hold tlb_c.lock.
* However, updates from the owner thread (as is the case here; see the
* above assert_cpu_is_self) do not need atomic_set because all reads
* that do not hold the lock are performed by the same owner thread.
*/
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
memset(env->tlb_table, -1, sizeof(env->tlb_table));
memset(env->tlb_v_table, -1, sizeof(env->tlb_v_table));
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
cpu_tb_jmp_cache_clear(cpu);
@ -195,7 +195,7 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data)
tlb_debug("start: mmu_idx:0x%04lx\n", mmu_idx_bitmask);
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
if (test_bit(mmu_idx, &mmu_idx_bitmask)) {
@ -205,7 +205,7 @@ static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data)
memset(env->tlb_v_table[mmu_idx], -1, sizeof(env->tlb_v_table[0]));
}
}
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
cpu_tb_jmp_cache_clear(cpu);
@ -262,7 +262,7 @@ static inline bool tlb_hit_page_anyprot(CPUTLBEntry *tlb_entry,
tlb_hit_page(tlb_entry->addr_code, page);
}
/* Called with tlb_lock held */
/* Called with tlb_c.lock held */
static inline void tlb_flush_entry_locked(CPUTLBEntry *tlb_entry,
target_ulong page)
{
@ -271,7 +271,7 @@ static inline void tlb_flush_entry_locked(CPUTLBEntry *tlb_entry,
}
}
/* Called with tlb_lock held */
/* Called with tlb_c.lock held */
static inline void tlb_flush_vtlb_page_locked(CPUArchState *env, int mmu_idx,
target_ulong page)
{
@ -304,12 +304,12 @@ static void tlb_flush_page_async_work(CPUState *cpu, run_on_cpu_data data)
}
addr &= TARGET_PAGE_MASK;
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
tlb_flush_entry_locked(tlb_entry(env, mmu_idx, addr), addr);
tlb_flush_vtlb_page_locked(env, mmu_idx, addr);
}
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
tb_flush_jmp_cache(cpu, addr);
}
@ -345,14 +345,14 @@ static void tlb_flush_page_by_mmuidx_async_work(CPUState *cpu,
tlb_debug("flush page addr:"TARGET_FMT_lx" mmu_idx:0x%lx\n",
addr, mmu_idx_bitmap);
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
if (test_bit(mmu_idx, &mmu_idx_bitmap)) {
tlb_flush_entry_locked(tlb_entry(env, mmu_idx, addr), addr);
tlb_flush_vtlb_page_locked(env, mmu_idx, addr);
}
}
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
tb_flush_jmp_cache(cpu, addr);
}
@ -479,7 +479,7 @@ void tlb_unprotect_code(ram_addr_t ram_addr)
* te->addr_write with atomic_set. We don't need to worry about this for
* oversized guests as MTTCG is disabled for them.
*
* Called with tlb_lock held.
* Called with tlb_c.lock held.
*/
static void tlb_reset_dirty_range_locked(CPUTLBEntry *tlb_entry,
uintptr_t start, uintptr_t length)
@ -501,7 +501,7 @@ static void tlb_reset_dirty_range_locked(CPUTLBEntry *tlb_entry,
}
/*
* Called with tlb_lock held.
* Called with tlb_c.lock held.
* Called only from the vCPU context, i.e. the TLB's owner thread.
*/
static inline void copy_tlb_helper_locked(CPUTLBEntry *d, const CPUTLBEntry *s)
@ -511,7 +511,7 @@ static inline void copy_tlb_helper_locked(CPUTLBEntry *d, const CPUTLBEntry *s)
/* This is a cross vCPU call (i.e. another vCPU resetting the flags of
* the target vCPU).
* We must take tlb_lock to avoid racing with another vCPU update. The only
* We must take tlb_c.lock to avoid racing with another vCPU update. The only
* thing actually updated is the target TLB entry ->addr_write flags.
*/
void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1, ram_addr_t length)
@ -521,7 +521,7 @@ void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1, ram_addr_t length)
int mmu_idx;
env = cpu->env_ptr;
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
unsigned int i;
@ -535,10 +535,10 @@ void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1, ram_addr_t length)
length);
}
}
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
}
/* Called with tlb_lock held */
/* Called with tlb_c.lock held */
static inline void tlb_set_dirty1_locked(CPUTLBEntry *tlb_entry,
target_ulong vaddr)
{
@ -557,7 +557,7 @@ void tlb_set_dirty(CPUState *cpu, target_ulong vaddr)
assert_cpu_is_self(cpu);
vaddr &= TARGET_PAGE_MASK;
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
tlb_set_dirty1_locked(tlb_entry(env, mmu_idx, vaddr), vaddr);
}
@ -568,7 +568,7 @@ void tlb_set_dirty(CPUState *cpu, target_ulong vaddr)
tlb_set_dirty1_locked(&env->tlb_v_table[mmu_idx][k], vaddr);
}
}
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
}
/* Our TLB does not support large pages, so remember the area covered by
@ -669,7 +669,7 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
* a longer critical section, but this is not a concern since the TLB lock
* is unlikely to be contended.
*/
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
/* Make sure there's no cached translation for the new page. */
tlb_flush_vtlb_page_locked(env, mmu_idx, vaddr_page);
@ -736,7 +736,7 @@ void tlb_set_page_with_attrs(CPUState *cpu, target_ulong vaddr,
}
copy_tlb_helper_locked(te, &tn);
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
}
/* Add a new TLB entry, but without specifying the memory
@ -917,11 +917,11 @@ static bool victim_tlb_hit(CPUArchState *env, size_t mmu_idx, size_t index,
/* Found entry in victim tlb, swap tlb and iotlb. */
CPUTLBEntry tmptlb, *tlb = &env->tlb_table[mmu_idx][index];
qemu_spin_lock(&env->tlb_lock);
qemu_spin_lock(&env->tlb_c.lock);
copy_tlb_helper_locked(&tmptlb, tlb);
copy_tlb_helper_locked(tlb, vtlb);
copy_tlb_helper_locked(vtlb, &tmptlb);
qemu_spin_unlock(&env->tlb_lock);
qemu_spin_unlock(&env->tlb_c.lock);
CPUIOTLBEntry tmpio, *io = &env->iotlb[mmu_idx][index];
CPUIOTLBEntry *vio = &env->iotlb_v[mmu_idx][vidx];

17
include/exec/cpu-defs.h
View file

@ -141,10 +141,21 @@ typedef struct CPUIOTLBEntry {
MemTxAttrs attrs;
} CPUIOTLBEntry;
/*
* Data elements that are shared between all MMU modes.
*/
typedef struct CPUTLBCommon {
/* lock serializes updates to tlb_table and tlb_v_table */
QemuSpin lock;
} CPUTLBCommon;
/*
* The meaning of each of the MMU modes is defined in the target code.
* Note that NB_MMU_MODES is not yet defined; we can only reference it
* within preprocessor defines that will be expanded later.
*/
#define CPU_COMMON_TLB \
/* The meaning of the MMU modes is defined in the target code. */ \
/* tlb_lock serializes updates to tlb_table and tlb_v_table */ \
QemuSpin tlb_lock; \
CPUTLBCommon tlb_c; \
CPUTLBEntry tlb_table[NB_MMU_MODES][CPU_TLB_SIZE]; \
CPUTLBEntry tlb_v_table[NB_MMU_MODES][CPU_VTLB_SIZE]; \
CPUIOTLBEntry iotlb[NB_MMU_MODES][CPU_TLB_SIZE]; \