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target-ppc: add flag in check_tlb_flush()

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We flush the qemu TLB lazily. check_tlb_flush is called whenever we hit
a context synchronizing event or instruction that requires a pending
flush to be performed.

However, we fail to handle broadcast TLB flush operations. In order to
fix that efficiently, we want to differentiate whether check_tlb_flush()
needs to only apply pending local flushes (isync instructions,
interrupts, ...) or also global pending flush operations. The latter is
only needed when executing instructions that are defined architecturally
as synchronizing global TLB flush operations. This in our case is
ptesync on BookS and tlbsync on BookE along with the paravirtualized
hypervisor calls.

Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
[dwg: Changed gen_check_tlb_flush() to also take a bool, and fixed
 some spelling errors in commit message]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Nikunj A Dadhania 2016-09-20 22:05:00 +05:30 • committed by David Gibson
parent a8a6d53e36
commit e3cffe6fad
6 changed files with 28 additions and 19 deletions
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4
hw/ppc/spapr_hcall.c
View file

@ -201,7 +201,7 @@ static target_ulong h_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
switch (ret) {
case REMOVE_SUCCESS:
check_tlb_flush(env);
check_tlb_flush(env, true);
return H_SUCCESS;
case REMOVE_NOT_FOUND:
@ -282,7 +282,7 @@ static target_ulong h_bulk_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
}
}
exit:
check_tlb_flush(env);
check_tlb_flush(env, true);
return rc;
}