diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2018-01-16 13:28:10 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-01-16 13:28:10 +0000 |
| commit | 8638f1ad7403b63db880dadce38e6690b5d82b64 (patch) | |
| tree | 8317391c0b8c0d16e596ecb36f2cc9145c4b0190 /target/arm/helper.c | |
| parent | 4b9774ef482d789d27938d0a7c14936ad706c74f (diff) | |
get_phys_addr_pmsav7: Support AP=0b111 for v7M
For PMSAv7, the v7A/R Arm ARM defines that setting AP to 0b111
is an UNPREDICTABLE reserved combination. However, for v7M
this value is documented as having the same behaviour as 0b110:
read-only for both privileged and unprivileged. Accept this
value on an M profile core rather than treating it as a guest
error and a no-access page.
Reported-by: Andy Gross <andy.gross@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 1512742402-31669-1-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index d1395f9b73..eb80f79ae1 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -9272,6 +9272,13 @@ static bool get_phys_addr_pmsav7(CPUARMState *env, uint32_t address, case 6: *prot |= PAGE_READ | PAGE_EXEC; break; + case 7: + /* for v7M, same as 6; for R profile a reserved value */ + if (arm_feature(env, ARM_FEATURE_M)) { + *prot |= PAGE_READ | PAGE_EXEC; + break; + } + /* fall through */ default: qemu_log_mask(LOG_GUEST_ERROR, "DRACR[%d]: Bad value for AP bits: 0x%" @@ -9290,6 +9297,13 @@ static bool get_phys_addr_pmsav7(CPUARMState *env, uint32_t address, case 6: *prot |= PAGE_READ | PAGE_EXEC; break; + case 7: + /* for v7M, same as 6; for R profile a reserved value */ + if (arm_feature(env, ARM_FEATURE_M)) { + *prot |= PAGE_READ | PAGE_EXEC; + break; + } + /* fall through */ default: qemu_log_mask(LOG_GUEST_ERROR, "DRACR[%d]: Bad value for AP bits: 0x%" |