bdaf61259a
Update to v2.4.0 OBS-URL: https://build.opensuse.org/request/show/329598 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=271
124 lines
3.7 KiB
Diff
124 lines
3.7 KiB
Diff
From 996083e51b49804d7d9b6fa8c0daa6b2a68fbfee Mon Sep 17 00:00:00 2001
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From: Alexander Graf <agraf@suse.de>
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Date: Wed, 11 Jul 2012 16:47:42 +0200
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Subject: [PATCH] linux-user: lock tb flushing too
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Signed-off-by: Alexander Graf <agraf@suse.de>
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[AF: Rebased onto exec.c/translate-all.c split for 1.4]
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Signed-off-by: Andreas Färber <afaerber@suse.de>
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---
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translate-all.c | 20 ++++++++++++++++++--
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1 file changed, 18 insertions(+), 2 deletions(-)
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diff --git a/translate-all.c b/translate-all.c
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index 60a3d8b..6de63cd 100644
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--- a/translate-all.c
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+++ b/translate-all.c
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@@ -705,19 +705,23 @@ static TranslationBlock *tb_alloc(target_ulong pc)
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{
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TranslationBlock *tb;
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+ tcg_lock();
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if (tcg_ctx.tb_ctx.nb_tbs >= tcg_ctx.code_gen_max_blocks ||
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(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer) >=
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tcg_ctx.code_gen_buffer_max_size) {
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+ tcg_unlock();
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return NULL;
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}
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tb = &tcg_ctx.tb_ctx.tbs[tcg_ctx.tb_ctx.nb_tbs++];
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tb->pc = pc;
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tb->cflags = 0;
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+ tcg_unlock();
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return tb;
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}
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void tb_free(TranslationBlock *tb)
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{
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+ tcg_lock();
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/* In practice this is mostly used for single use temporary TB
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Ignore the hard cases and just back up if this TB happens to
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be the last one generated. */
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@@ -726,6 +730,7 @@ void tb_free(TranslationBlock *tb)
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tcg_ctx.code_gen_ptr = tb->tc_ptr;
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tcg_ctx.tb_ctx.nb_tbs--;
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}
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+ tcg_unlock();
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}
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static inline void invalidate_page_bitmap(PageDesc *p)
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@@ -781,6 +786,7 @@ void tb_flush(CPUState *cpu)
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((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer)) /
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tcg_ctx.tb_ctx.nb_tbs : 0);
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#endif
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+ tcg_lock();
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if ((unsigned long)(tcg_ctx.code_gen_ptr - tcg_ctx.code_gen_buffer)
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> tcg_ctx.code_gen_buffer_size) {
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cpu_abort(cpu, "Internal error: code buffer overflow\n");
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@@ -798,6 +804,7 @@ void tb_flush(CPUState *cpu)
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/* XXX: flush processor icache at this point if cache flush is
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expensive */
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tcg_ctx.tb_ctx.tb_flush_count++;
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+ tcg_unlock();
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}
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#ifdef DEBUG_TB_CHECK
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@@ -1079,8 +1086,10 @@ void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
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int current_flags = 0;
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#endif /* TARGET_HAS_PRECISE_SMC */
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+ tcg_lock();
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p = page_find(start >> TARGET_PAGE_BITS);
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if (!p) {
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+ tcg_unlock();
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return;
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}
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#if defined(TARGET_HAS_PRECISE_SMC)
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@@ -1165,6 +1174,7 @@ void tb_invalidate_phys_page_range(tb_page_addr_t start, tb_page_addr_t end,
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cpu_resume_from_signal(cpu, NULL);
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}
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#endif
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+ tcg_unlock();
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}
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/* len must be <= 8 and start must be a multiple of len */
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@@ -1379,13 +1389,16 @@ static TranslationBlock *tb_find_pc(uintptr_t tc_ptr)
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{
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int m_min, m_max, m;
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uintptr_t v;
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- TranslationBlock *tb;
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+ TranslationBlock *tb, *r;
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+ tcg_lock();
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if (tcg_ctx.tb_ctx.nb_tbs <= 0) {
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+ tcg_unlock();
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return NULL;
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}
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if (tc_ptr < (uintptr_t)tcg_ctx.code_gen_buffer ||
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tc_ptr >= (uintptr_t)tcg_ctx.code_gen_ptr) {
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+ tcg_unlock();
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return NULL;
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}
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/* binary search (cf Knuth) */
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@@ -1396,6 +1409,7 @@ static TranslationBlock *tb_find_pc(uintptr_t tc_ptr)
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tb = &tcg_ctx.tb_ctx.tbs[m];
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v = (uintptr_t)tb->tc_ptr;
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if (v == tc_ptr) {
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+ tcg_unlock();
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return tb;
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} else if (tc_ptr < v) {
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m_max = m - 1;
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@@ -1403,7 +1417,9 @@ static TranslationBlock *tb_find_pc(uintptr_t tc_ptr)
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m_min = m + 1;
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}
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}
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- return &tcg_ctx.tb_ctx.tbs[m_max];
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+ r = &tcg_ctx.tb_ctx.tbs[m_max];
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+ tcg_unlock();
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+ return r;
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}
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#if !defined(CONFIG_USER_ONLY)
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