| commit | e4c93e44ab103f6c67abd85d620343f61aafa004 | |
| author | Peter Maydell <peter.maydell@linaro.org> | |
| Fri, 21 Oct 2022 16:01:31 +0000 (21 17:01 +0100) | ||
| committer | Peter Maydell <peter.maydell@linaro.org> | |
| Thu, 27 Oct 2022 09:27:23 +0000 (27 10:27 +0100) | ||
| tree | 29ff31acaafd54705245a67e216b2e0cca8fc3e3 | treesnapshot (tar.gz zip) |
| parent | 344744e148e6e865f5a57e745b02a87e5ea534ad | commitdiff |
target/arm: Implement FEAT_E0PD
FEAT_E0PD adds new bits E0PD0 and E0PD1 to TCR_EL1, which allow the
OS to forbid EL0 access to half of the address space. Since this is
an EL0-specific variation on the existing TCR_ELx.{EPD0,EPD1}, we can
implement it entirely in aa64_va_parameters().
This requires moving the existing regime_is_user() to internals.h
so that the code in helper.c can get at it.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20221021160131.3531787-1-peter.maydell@linaro.org
FEAT_E0PD adds new bits E0PD0 and E0PD1 to TCR_EL1, which allow the
OS to forbid EL0 access to half of the address space. Since this is
an EL0-specific variation on the existing TCR_ELx.{EPD0,EPD1}, we can
implement it entirely in aa64_va_parameters().
This requires moving the existing regime_is_user() to internals.h
so that the code in helper.c can get at it.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20221021160131.3531787-1-peter.maydell@linaro.org