linux-kernel - [PATCH 14/14] KVM: selftests: Enable RSEQ test for RISC-V

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Message-ID: <20221213001653.3852042-15-seanjc@google.com>
Date:   Tue, 13 Dec 2022 00:16:53 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>, Marc Zyngier <maz@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        Tom Rix <trix@...hat.com>, kvm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        kvmarm@...ts.cs.columbia.edu, linux-riscv@...ts.infradead.org,
        llvm@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Ricardo Koller <ricarkol@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Aaron Lewis <aaronlewis@...gle.com>,
        Raghavendra Rao Ananta <rananta@...gle.com>
Subject: [PATCH 14/14] KVM: selftests: Enable RSEQ test for RISC-V

Enable the RSEQ test for RISC-V, which according to HAVE_RSEQ is supported
by the kernel and thus should be tested.  The RSEQ test was added shortly
before RISC-V selftests support landed, i.e. was likely overlooked during
merging.

Note, the RSEQ test currently doesn't compile with clang due to an issue
in the base RSEQ test code.  Given that clang is constantly broken for KVM
selftests, enable the RSEQ test and deal with its broken clang state in a
separate commit/series.

  In file included from rseq_test.c:23:
  In file included from ./../rseq/rseq.c:33:
  In file included from ../rseq/rseq.h:97:
  ../rseq/rseq-riscv.h:657:17: error: invalid input constraint 'er' in asm
                                      [off]                       "er" (off),
                                                                ^

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 tools/testing/selftests/kvm/rseq_test.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/rseq_test.c b/tools/testing/selftests/kvm/rseq_test.c
index 34c3df9b4e81..3045fdf9bdf5 100644
--- a/tools/testing/selftests/kvm/rseq_test.c
+++ b/tools/testing/selftests/kvm/rseq_test.c
@@ -22,8 +22,6 @@
 
 #include "../rseq/rseq.c"
 
-TEST_UNSUPPORTED(riscv);
-
 /*
  * Any bug related to task migration is likely to be timing-dependent; perform
  * a large number of migrations to reduce the odds of a false negative.
-- 
2.39.0.rc1.256.g54fd8350bd-goog