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| author |   Christoffer Dall <christoffer.dall@arm.com> | 2023-02-09 17:58:13 +0000 |
|---|---|---|
| committer |   Oliver Upton <oliver.upton@linux.dev> | 2023-02-11 09:16:11 +0000 |
| commit | 6898a55ce38c13e47a0647380504d309e9b0f631 (patch) | |
| tree | eb99e828dfce9ce83137ab8a7d448e68792c5c0a /arch/arm64/include/asm/esr.h | |
| parent | KVM: arm64: nv: Inject HVC exceptions to the virtual EL2 (diff) | |
| download | wireguard-linux-6898a55ce38c13e47a0647380504d309e9b0f631.tar.xz wireguard-linux-6898a55ce38c13e47a0647380504d309e9b0f631.zip | |
KVM: arm64: nv: Handle trapped ERET from virtual EL2
When a guest hypervisor running virtual EL2 in EL1 executes an ERET
instruction, we will have set HCR_EL2.NV which traps ERET to EL2, so
that we can emulate the exception return in software.
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230209175820.1939006-12-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'arch/arm64/include/asm/esr.h')
| -rw-r--r-- | arch/arm64/include/asm/esr.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h index 206de10524e3..d4dd949b921e 100644 --- a/arch/arm64/include/asm/esr.h +++ b/arch/arm64/include/asm/esr.h @@ -272,6 +272,10 @@ (((e) & ESR_ELx_SYS64_ISS_OP2_MASK) >> \ ESR_ELx_SYS64_ISS_OP2_SHIFT)) +/* ISS field definitions for ERET/ERETAA/ERETAB trapping */ +#define ESR_ELx_ERET_ISS_ERET 0x2 +#define ESR_ELx_ERET_ISS_ERETA 0x1 + /* * ISS field definitions for floating-point exception traps * (FP_EXC_32/FP_EXC_64). |