{"action":"created","issue":{"url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/1408","repository_url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware","labels_url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/1408/labels{/name}","comments_url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/1408/comments","events_url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/1408/events","html_url":"https://github.com/ARM-software/arm-trusted-firmware/pull/1408","id":330574443,"node_id":"MDExOlB1bGxSZXF1ZXN0MTkzNTQ5MTAz","number":1408,"title":"invalid DCache of stack before we use it","user":{"login":"kenkuang","id":2087327,"node_id":"MDQ6VXNlcjIwODczMjc=","avatar_url":"https://avatars1.githubusercontent.com/u/2087327?v=4","gravatar_id":"","url":"https://api.github.com/users/kenkuang","html_url":"https://github.com/kenkuang","followers_url":"https://api.github.com/users/kenkuang/followers","following_url":"https://api.github.com/users/kenkuang/following{/other_user}","gists_url":"https://api.github.com/users/kenkuang/gists{/gist_id}","starred_url":"https://api.github.com/users/kenkuang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kenkuang/subscriptions","organizations_url":"https://api.github.com/users/kenkuang/orgs","repos_url":"https://api.github.com/users/kenkuang/repos","events_url":"https://api.github.com/users/kenkuang/events{/privacy}","received_events_url":"https://api.github.com/users/kenkuang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-06-08T08:56:07Z","updated_at":"2018-06-08T09:17:49Z","closed_at":null,"author_association":"NONE","pull_request":{"url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/pulls/1408","html_url":"https://github.com/ARM-software/arm-trusted-firmware/pull/1408","diff_url":"https://github.com/ARM-software/arm-trusted-firmware/pull/1408.diff","patch_url":"https://github.com/ARM-software/arm-trusted-firmware/pull/1408.patch"},"body":"On the warm boot path, when we use HW_ASSISTED_COHERENCY options\r\nWe have to invalid DCache of stack before we use it\r\nand, before we enable DCache, we must make sure invalid the stack\r\n\r\nSigned-off-by: Ken Kuang <ken.kuang@unisoc.com>"},"comment":{"url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/comments/395702576","html_url":"https://github.com/ARM-software/arm-trusted-firmware/pull/1408#issuecomment-395702576","issue_url":"https://api.github.com/repos/ARM-software/arm-trusted-firmware/issues/1408","id":395702576,"node_id":"MDEyOklzc3VlQ29tbWVudDM5NTcwMjU3Ng==","user":{"login":"jeenu-arm","id":20659864,"node_id":"MDQ6VXNlcjIwNjU5ODY0","avatar_url":"https://avatars2.githubusercontent.com/u/20659864?v=4","gravatar_id":"","url":"https://api.github.com/users/jeenu-arm","html_url":"https://github.com/jeenu-arm","followers_url":"https://api.github.com/users/jeenu-arm/followers","following_url":"https://api.github.com/users/jeenu-arm/following{/other_user}","gists_url":"https://api.github.com/users/jeenu-arm/gists{/gist_id}","starred_url":"https://api.github.com/users/jeenu-arm/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jeenu-arm/subscriptions","organizations_url":"https://api.github.com/users/jeenu-arm/orgs","repos_url":"https://api.github.com/users/jeenu-arm/repos","events_url":"https://api.github.com/users/jeenu-arm/events{/privacy}","received_events_url":"https://api.github.com/users/jeenu-arm/received_events","type":"User","site_admin":false},"created_at":"2018-06-08T09:17:49Z","updated_at":"2018-06-08T09:17:49Z","author_association":"MEMBER","body":"Looks like you've encountered the same problem as described by [issue #566](https://github.com/ARM-software/tf-issues/issues/566). Although stack invalidation is one way to solve the problem, the main selling point of DynamIQ support to avoid doing any kind of cache-maintenance in software.\r\n\r\nAs commented in the issue I linked above, the approach we thought we'd take was to enable MMU without using stack in the first place. A small series of patches is almost ready; we should be able to get a PR out for that soon next week."}}
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