diff options
| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2016-03-30 14:33:59 +0100 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2016-03-30 22:09:15 +0200 |
| commit | cb678d6016510cc8c6572dd9f426fe74dd4eda84 (patch) | |
| tree | 0dafa6f84fbb8afd02fabdb8bdf79ed699049bff /arch/arm64/include/asm/sysreg.h | |
| parent | f55532a0c0b8bb6148f4e07853b876ef73bc69ca (diff) | |
| download | lwn-cb678d6016510cc8c6572dd9f426fe74dd4eda84.tar.gz lwn-cb678d6016510cc8c6572dd9f426fe74dd4eda84.zip | |
arm64: kvm: 4.6-rc1: Fix VTCR_EL2 VS setting
When we detect support for 16bit VMID in ID_AA64MMFR1, we set the
VTCR_EL2_VS field to 1 to make use of 16bit vmids. But, with
commit 3a3604bc5eb4 ("arm64: KVM: Switch to C-based stage2 init")
this is broken and we corrupt VTCR_EL2:T0SZ instead of updating the VS
field. VTCR_EL2_VS was actually defined to the field shift (19) and
not the real value for VS. This patch fixes the issue.
Fixes: commit 3a3604bc5eb4 ("arm64: KVM: Switch to C-based stage2 init")
Cc: Christoffer Dall <christoffer.dall@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'arch/arm64/include/asm/sysreg.h')
| -rw-r--r-- | arch/arm64/include/asm/sysreg.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 1a78d6e2a78b..12874164b0ae 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -141,6 +141,9 @@ #define ID_AA64MMFR1_VMIDBITS_SHIFT 4 #define ID_AA64MMFR1_HADBS_SHIFT 0 +#define ID_AA64MMFR1_VMIDBITS_8 0 +#define ID_AA64MMFR1_VMIDBITS_16 2 + /* id_aa64mmfr2 */ #define ID_AA64MMFR2_UAO_SHIFT 4 |