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This has been updated >> following the feedback from the v3 posting[1]. Thanks for the feedback! >> Individual patches have a change log. But things to highlight: >> >> * a new patch ("firmware/psci: Add psci_early_test_conduit()") to >> prevent SMC calls being made on systems which don't support them - >> i.e. systems without EL2/EL3 - thanks Jean-Philippe! >> >> * two patches dropped (overriding set_fixmap_io). Instead >> FIXMAP_PAGE_IO is modified to include PROT_NS_SHARED. When support >> for assigning hardware devices to a realm guest is added this will >> need to be brought back in some form. But for now it's just adding >> complixity and confusion for no gain. >> >> * a new patch ("arm64: mm: Avoid TLBI when marking pages as valid") >> which avoids doing an extra TLBI when doing the break-before-make. >> Note that this changes the behaviour in other cases when making >> memory valid. This should be safe (and saves a TLBI for those cases), >> but it's a separate patch in case of regressions. >> >> * GIC ITT allocation now uses a custom genpool-based allocator. I >> expect this will be replaced with a generic way of allocating >> decrypted memory (see [4]), but for now this gets things working >> without wasting too much memory. >> >> The ABI to the RMM from a realm (the RSI) is based on the final RMM v1.0 >> (EAC 5) specification[2]. Future RMM specifications will be backwards >> compatible so a guest using the v1.0 specification (i.e. this series) >> will be able to run on future versions of the RMM without modification. >> >> This series is based on v6.10-rc1. It is also available as a git >> repository: >> >> https://gitlab.arm.com/linux-arm/linux-cca cca-guest/v4 Which cca-host branch should I use for testing cca-guest/v4? I'm getting compilation errors with cca-host/v3 and cca-guest/v4, is there any known WAR or fix to resolve this issue? arch/arm64/kvm/rme.c: In function ‘kvm_realm_reset_id_aa64dfr0_el1’: ././include/linux/compiler_types.h:487:45: error: call to ‘__compiletime_assert_650’ declared with attribute error: FIELD_PREP: value too large for the field 487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ ././include/linux/compiler_types.h:468:25: note: in definition of macro ‘__compiletime_assert’ 468 | prefix ## suffix(); \ | ^~~~~~ ././include/linux/compiler_types.h:487:9: note: in expansion of macro ‘_compiletime_assert’ 487 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ ./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’ 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ ./include/linux/bitfield.h:68:17: note: in expansion of macro ‘BUILD_BUG_ON_MSG’ 68 | BUILD_BUG_ON_MSG(__builtin_constant_p(_val) ? \ | ^~~~~~~~~~~~~~~~ ./include/linux/bitfield.h:115:17: note: in expansion of macro ‘__BF_FIELD_CHECK’ 115 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); \ | ^~~~~~~~~~~~~~~~ arch/arm64/kvm/rme.c:315:16: note: in expansion of macro ‘FIELD_PREP’ 315 | val |= FIELD_PREP(ID_AA64DFR0_EL1_BRPs_MASK, bps - 1) | | ^~~~~~~~~~ make[5]: *** [scripts/Makefile.build:244: arch/arm64/kvm/rme.o] Error 1 make[4]: *** [scripts/Makefile.build:485: arch/arm64/kvm] Error 2 make[3]: *** [scripts/Makefile.build:485: arch/arm64] Error 2 make[3]: *** Waiting for unfinished jobs.... I'm using gcc-13.3.0 compiler and cross-compiling on X86 machine. -Shanker