Searched hist:b0c756fe996ac930033882ca56410639e5cad1ec (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/arch/arm64/tools/ |
| H A D | cpucaps | diff b0c756fe996ac930033882ca56410639e5cad1ec Tue May 09 09:22:26 CDT 2023 Kristina Martsenko <kristina.martsenko@arm.com> arm64: cpufeature: detect FEAT_HCX
Detect if the system has the new HCRX_EL2 register added in ARMv8.7/9.2,
so that subsequent patches can check for its presence.
KVM currently relies on the register being present on all CPUs (or
none), so the kernel will panic if that is not the case. Fortunately no
such systems currently exist, but this can be revisited if they appear.
Note that the kernel will not panic if CONFIG_KVM is disabled.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20230509142235.3284028-3-kristina.martsenko@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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| /openbmc/linux/arch/arm64/kernel/ |
| H A D | cpufeature.c | diff b0c756fe996ac930033882ca56410639e5cad1ec Tue May 09 09:22:26 CDT 2023 Kristina Martsenko <kristina.martsenko@arm.com> arm64: cpufeature: detect FEAT_HCX
Detect if the system has the new HCRX_EL2 register added in ARMv8.7/9.2,
so that subsequent patches can check for its presence.
KVM currently relies on the register being present on all CPUs (or
none), so the kernel will panic if that is not the case. Fortunately no
such systems currently exist, but this can be revisited if they appear.
Note that the kernel will not panic if CONFIG_KVM is disabled.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
Link: https://lore.kernel.org/r/20230509142235.3284028-3-kristina.martsenko@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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