diff options
| author | Dimitris Papastamos <dimitris.papastamos@arm.com> | 2018-01-02 15:53:01 +0000 |
|---|---|---|
| committer | Dimitris Papastamos <dimitris.papastamos@arm.com> | 2018-01-11 10:26:15 +0000 |
| commit | 780edd86a0b413c3620c5c42fd123a78b5b1587a (patch) | |
| tree | db65d33adc45ff13b8dc2a6eb5252a94d1405057 /include/lib/aarch64 | |
| parent | a1781a211a53df6a24345d774c0f2eaa5b675ca8 (diff) | |
Use PFR0 to identify need for mitigation of CVE-2017-5915
If the CSV2 field reads as 1 then branch targets trained in one
context cannot affect speculative execution in a different context.
In that case skip the workaround on Cortex A75.
Change-Id: I4d5504cba516a67311fb5f0657b08f72909cbd38
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
Diffstat (limited to 'include/lib/aarch64')
| -rw-r--r-- | include/lib/aarch64/arch.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h index 13a8c797..7f3e9faa 100644 --- a/include/lib/aarch64/arch.h +++ b/include/lib/aarch64/arch.h @@ -117,6 +117,9 @@ #define ID_AA64PFR0_SVE_SHIFT U(32) #define ID_AA64PFR0_SVE_MASK U(0xf) #define ID_AA64PFR0_SVE_LENGTH U(4) +#define ID_AA64PFR0_CSV2_SHIFT U(56) +#define ID_AA64PFR0_CSV2_MASK U(0xf) +#define ID_AA64PFR0_CSV2_LENGTH U(4) /* ID_AA64DFR0_EL1.PMS definitions (for ARMv8.2+) */ #define ID_AA64DFR0_PMS_SHIFT U(32) |