Searched hist:"7 dabf02f" (Results 1 – 3 of 3) sorted by relevance
| /openbmc/linux/arch/arm64/kvm/ |
| H A D | debug.c | 7dabf02f Thu Feb 03 11:41:57 CST 2022 Oliver Upton <oupton@google.com> KVM: arm64: Emulate the OS Lock
The OS lock blocks all debug exceptions at every EL. To date, KVM has
not implemented the OS lock for its guests, despite the fact that it is
mandatory per the architecture. Simple context switching between the
guest and host is not appropriate, as its effects are not constrained to
the guest context.
Emulate the OS Lock by clearing MDE and SS in MDSCR_EL1, thereby
blocking all but software breakpoint instructions.
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220203174159.2887882-5-oupton@google.com
|
| H A D | sys_regs.c | 7dabf02f Thu Feb 03 11:41:57 CST 2022 Oliver Upton <oupton@google.com> KVM: arm64: Emulate the OS Lock
The OS lock blocks all debug exceptions at every EL. To date, KVM has
not implemented the OS lock for its guests, despite the fact that it is
mandatory per the architecture. Simple context switching between the
guest and host is not appropriate, as its effects are not constrained to
the guest context.
Emulate the OS Lock by clearing MDE and SS in MDSCR_EL1, thereby
blocking all but software breakpoint instructions.
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220203174159.2887882-5-oupton@google.com
|
| /openbmc/linux/arch/arm64/include/asm/ |
| H A D | kvm_host.h | 7dabf02f Thu Feb 03 11:41:57 CST 2022 Oliver Upton <oupton@google.com> KVM: arm64: Emulate the OS Lock
The OS lock blocks all debug exceptions at every EL. To date, KVM has
not implemented the OS lock for its guests, despite the fact that it is
mandatory per the architecture. Simple context switching between the
guest and host is not appropriate, as its effects are not constrained to
the guest context.
Emulate the OS Lock by clearing MDE and SS in MDSCR_EL1, thereby
blocking all but software breakpoint instructions.
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220203174159.2887882-5-oupton@google.com
|