Re: [PATCH] KVM: Qemu: Flush i-cache after ide-dma operation in IA64
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Avi Kivity wrote:
It doesn't had to do it. The PCI transaction will automatically invalidatecaches - but qemu doesn't emulate this (and doesn't need to do on x86).So any DMA on ia64 will flush the instruction caches?!
Or maybe, the host kernel will do it after the transaction completes? In our case the lack of zero-copy means the host is invalidating the wrong addresses (memcpy source) and leaving the real destination intact.
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