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Re: [Xen-devel] [GSOC-2019] Problem with initializing crossbar on bb-x15 in dom0


  • To: Iain Hunter <drhunter95@xxxxxxxxx>
  • From: Denis Obrezkov <denisobrezkov@xxxxxxxxx>
  • Date: Fri, 5 Jul 2019 23:47:55 +0200
  • Autocrypt: addr=denisobrezkov@xxxxxxxxx; prefer-encrypt=mutual; keydata= mQMuBFrAxPQRCAD59CJNd5LF1VmojUBpdr/bJ2TaKC7SW4ln7+PWn+QyAJfFOVFlTRIDsAlP 65y7CacXFCXmLTACo4a7HEhRb5787kPm6rc30zpL+04uXCeTruYZi0ZnQVXOiab/qy3aMsk0 6n9hMY28TSbM9nynnlrbg9pGkb1EiFVNsowJjFSKXa3Rpogte9qxfXmLf2eV0MZNnrmq6Kb2 8ri5/Ffh5DG1CsN/dkv8n1kw2QqMM2RT+ZS57D+yCehtw355EXSVh2r+GsXAqMinOexcdYI4 skvvP84OovRMnlJhmRdnbjO+QFiOVeLUj7WHMT3AbClaBlUuHkbFi9HLBHAiu6uMrNtzAQD9 KoM6SXbuvlhCq2v78dGkex9EgaA7CSnBcNXuUdrjYQf+MsZgI7oDihT6TUBO0IDQL+qSrozs /hHV+HhWtc5+SYTsHXxnTkcVe12vR0uPw3fFUuncWnMRzHivKZC2ZF/w3LJL/nGzguAoPa9e VghM38EP49yO6ESthD4WvELMy2+zPkMiUqilMfxOl370RXxEBUIzFSpP6oqvNq7fvThGTQah mrFhflGSyMHXk75VkCiY+cbrMeB9xG7H3nlbQ9fYVCOPejnt8gImeazdIghQh1tjbNpjQhy8 50klCowN5H+gaSZsy4K7jlJ1UNFz/vWCvlr3W8o4tA6EoJ4tjJV2HXcrUBPYLwkruKnv8QJM vyVj5an6Sfuwt/AmFEOKo1QJnAf+Oi47RrOmec8lXS/06TMn7z6krmuRul03HXayCtREqMyY VCf87oMpPYYnFJolDrSB8kCSZRn2aixzHl4IIGa9RVuywChzUvgZJbFGPFR+Qz1BK9Ltl7FC rQcuAqg3A2RJ7uoTNiZDfI0tKWm8BEUe5LqZqgFTkTkuV9D6UveYnDk2zUFGlDTguagW2XWI wiGaA9Ud7UBBlQGTZUwNGahAErUHI5gDSNfWEUaRBEccWKgddK3a/NhkxOveqDWWFcAt4K/g JOqBs+7Bm0RjQa+4EAP6gFx4098XBZP9ff6pPuFWRN6fvfdBDUMHqb3i2SGDWVPrRR/x+Iz/ yfjdWlC/87QoRGVuaXMgT2JyZXprb3YgPGRlbmlzb2JyZXprb3ZAZ21haWwuY29tPoiWBBMR CAA+FiEExuZY9Y+VSLigQ/5M+4kLEySe7PkFAlrAxPQCGyMFCQWjmoAFCwkIBwIGFQgJCgsC BBYCAwECHgECF4AACgkQ+4kLEySe7PleSQEAktULi71pVGKh0vykq0wrn6IyqXx1SLFNwLcr PnZ2N5gA/3Ipzf3vXWXWCwRR07BB/H+9XgqWRl3jsu5EL9TzmyFAuQINBFrAxPQQCADaIOKd +PPUX4GvjdLikKxHsFRRpk75LiFZJcFU8cCA0M4Dg/Q0LcSX82TfgrfU34y7/rrF4ig/Dj81 H8MB2u01lYA2QpQ/XdHfwFMxkj5FCB4Cq6EqGxsXsaRhw4Qu3ouiJiHCEeoMoloBLOlqpXBf qnJSnBXYJDnlyvxoFIVpX4l+q2xJk/877otbPK5TBYdeHQv/f7cWNxIUT5Feth9DVq4B9OG1 BgOA1gH13KUmWhMaO+k/rYCJd9UiRoGm7FihyWrsRnG5K6VNnLjwjMjxDukNxdlITVbeK5/E QaiKRGRcTp3OwfHy6HlQH/JXGGyfmEx0rKVjoW/DD76MPpk/AAMFB/0SBNOW9asG5HeRKhJm QOPJDwNQik4t8uuZb7mw6+QoQuyzMBkXvhL7Aud0OluPeSYL2jZPw2IB26gvlUVva+FJRW9X 7cInI5mnuB4HBGdNpzR+ngRzFyf+qsd6cUrrioQUQozQKCgKG/J2LimV1fC4hQW0n5Q0qM9I KX3PtRCgxItQbn/HdqkTXqv8oxDB9cQILJvIYDZnVLojB4rJFUNb397ao3qaXdXj3iaX6wwJ 2Oo3cSxMGdY/8grRTDGYjItpWEM2noIRzdWSybzavtLHu/LmG4rbgy2aNm/TiVp28G5KvWW/ fCLomZhN0JscRgSkYjSaxmMgEdks1h9DWTHkiH4EGBEIACYWIQTG5lj1j5VIuKBD/kz7iQsT JJ7s+QUCWsDE9AIbDAUJBaOagAAKCRD7iQsTJJ7s+UF2AQDqHEO2tekVMTWJa3SakIM5FJjk sao+JkzbKe0vDy4ecwEAukGaHvmKxMZsUOOjDWjDe4eV+aRTVjUjY7LAl3OJkiU=
  • Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Julien Grall <julien.grall@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Hunyue Yau <hy-gsoc@xxxxxxxxxxxxxxx>
  • Delivery-date: Fri, 05 Jul 2019 21:48:23 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

So,


> I am going to try to expose the whole crossbar to the dom0 by mapping it
> into dom0 and after that to unmap it and restrict the use of the control
> register via register_mmio_handler. Don't know whether this will work.
> 

I tried and write now now visible progress:
--- a/xen/arch/arm/platforms/omap5.c
+++ b/xen/arch/arm/platforms/omap5.c
@@ -23,6 +23,8 @@
 #include <xen/vmap.h>
 #include <asm/io.h>

+#define OMAP5_CTRL_CORE_MPU_IRQ 0x00000A48
+
 void omap5_init_secondary(void);
 asm (
         ".text                              \n\t"
@@ -124,6 +126,8 @@ static int omap5_specific_mapping(struct domain *d)
     map_mmio_regions(d, gaddr_to_gfn(OMAP5_SRAM_PA), 32,
                      maddr_to_mfn(OMAP5_SRAM_PA));

+    map_mmio_regions(d, gaddr_to_gfn(OMAP5_CTRL_CORE_MPU_IRQ), 300,
+                    maddr_to_mfn(OMAP5_CTRL_CORE_MPU_IRQ));
     return 0;
 }


-- 
Regards, Denis Obrezkov

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