| commit | 0e2845689ebdb4ea7174f96f6797e2d8942bd114 | |
| author | Peter Maydell <peter.maydell@linaro.org> | |
| Mon, 4 Sep 2017 14:21:51 +0000 (4 15:21 +0100) | ||
| committer | Peter Maydell <peter.maydell@linaro.org> | |
| Mon, 4 Sep 2017 14:21:51 +0000 (4 15:21 +0100) | ||
| tree | bf1c4fc57a336e7eafd586184ad8a47c3e946b09 | treesnapshot (tar.gz zip) |
| parent | 03ae85f858fc46495258a5dd4551fff2c34bd495 | commitdiff |
target/arm: Don't trap WFI/WFE for M profile
M profile cores can never trap on WFI or WFE instructions. Check for
M profile in check_wfx_trap() to ensure this.
The existing code will do the right thing for v7M cores because
the hcr_el2 and scr_el3 registers will be all-zeroes and so we
won't attempt to trap, but when we start setting ARM_FEATURE_V8
for v8M cores the v8A handling of SCTLR.nTWE and .nTWI will not
give the right results.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1501692241-23310-3-git-send-email-peter.maydell@linaro.org
M profile cores can never trap on WFI or WFE instructions. Check for
M profile in check_wfx_trap() to ensure this.
The existing code will do the right thing for v7M cores because
the hcr_el2 and scr_el3 registers will be all-zeroes and so we
won't attempt to trap, but when we start setting ARM_FEATURE_V8
for v8M cores the v8A handling of SCTLR.nTWE and .nTWI will not
give the right results.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1501692241-23310-3-git-send-email-peter.maydell@linaro.org
| target/arm/op_helper.c | diffblobblamehistory |