On Mon, May 14, 2018 at 6:24 PM, Nick Desaulniers <ndesaulniers@xxxxxxxxxx> wrote: > On Fri, Apr 20, 2018 at 7:59 AM Andrey Konovalov <andreyknvl@xxxxxxxxxx> > wrote: >> On Fri, Apr 20, 2018 at 10:13 AM, Marc Zyngier <marc.zyngier@xxxxxxx> > wrote: >> >> The issue is that >> >> clang doesn't know about the "S" asm constraint. I reported this to >> >> clang [2], and hopefully this will get fixed. In the meantime, would >> >> it possible to work around using the "S" constraint in the kernel? >> > >> > I have no idea, I've never used clang to build the kernel. Clang isn't >> > really supported to build the arm64 kernel anyway (as you mention >> > below), and working around clang deficiencies would mean that we leave >> > with the workaround forever. I'd rather enable clang once it is at >> > feature parity with GCC. > >> The fact that there are some existing issues with building arm64 >> kernel with clang doesn't sound like a good justification for adding >> new issues :) > >> However in this case I do believe that this is more of a bug in clang >> that should be fixed. > > Just to follow up with this thread; > > Support for "S" constraints is being (re-)added to Clang in: > https://reviews.llvm.org/D46745 Hi Nick! I can confirm that the latest clang (which includes this patch) is able to build the kernel with CONFIG_KVM enabled. Thanks! _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
