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| author | Christoffer Dall <christoffer.dall@arm.com> | 2018-10-17 21:21:16 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-10-19 13:13:03 +0300 |
| commit | e4e11cc0f81ee7be17d6f6fb96128a6d51c0e838 (patch) | |
| tree | 16a1070795b753152fff3b97c20f7bdc18123a0c /arch/arm64/include/asm/ptrace.h | |
| parent | 58bf437ff64eac8aca606e42d7e4623e40b61fa1 (diff) | |
| download | linux-e4e11cc0f81ee7be17d6f6fb96128a6d51c0e838.tar.xz | |
KVM: arm64: Safety check PSTATE when entering guest and handle IL
This commit adds a paranoid check when entering the guest to make sure
we don't attempt running guest code in an equally or more privilged mode
than the hypervisor. We also catch other accidental programming of the
SPSR_EL2 which results in an illegal exception return and report this
safely back to the user.
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/ptrace.h')
| -rw-r--r-- | arch/arm64/include/asm/ptrace.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index 177b851ca6d9..ff35ac1258eb 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -25,6 +25,9 @@ #define CurrentEL_EL1 (1 << 2) #define CurrentEL_EL2 (2 << 2) +/* Additional SPSR bits not exposed in the UABI */ +#define PSR_IL_BIT (1 << 20) + /* AArch32-specific ptrace requests */ #define COMPAT_PTRACE_GETREGS 12 #define COMPAT_PTRACE_SETREGS 13 |