Peter Maydell 34d49937e4 accel/tcg: Handle atomic accesses to notdirty memory correctly ... To do a write to memory that is marked as notdirty, we need to invalidate any TBs we have cached for that memory, and update the cpu physical memory dirty flags for VGA and migration. The slowpath code in notdirty_mem_write() does all this correctly, but the new atomic handling code in atomic_mmu_lookup() doesn't do anything at all, it just clears the dirty bit in the TLB. The effect of this bug is that if the first write to a notdirty page for which we have cached TBs is by a guest atomic access, we fail to invalidate the TBs and subsequently will execute incorrect code. This can be seen by trying to run 'javac' on AArch64. Use the new notdirty_call_before() and notdirty_call_after() functions to correctly handle the update to notdirty memory in the atomic codepath. Cc: qemu-stable@nongnu.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 1511201308-23580-3-git-send-email-peter.maydell@linaro.org		2017-11-21 12:09:25 +00:00
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kvm	kvm: simplify kvm_align_section()	2017-10-18 10:15:00 +02:00
stubs	kvm: check KVM_CAP_SYNC_MMU with kvm_vm_check_extension()	2017-10-02 14:38:06 +02:00
tcg	accel/tcg: Handle atomic accesses to notdirty memory correctly	2017-11-21 12:09:25 +00:00
accel.c	accel: cleanup error output	2017-08-01 17:27:33 +02:00
Makefile.objs	tcg: add the CONFIG_TCG into Makefiles	2017-07-05 09:12:44 +02:00