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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2024-10-17 14:14:25 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2024-10-23 10:19:32 +0100 |
| commit | c077711f718be7cebcc8b987eac2ebfd17447e9f (patch) | |
| tree | a55728dd67d614957c65f6fc7422931e474a975c /arch/arm64/kernel/setup.c | |
| parent | b880a80011f56880f32bde47fc6af313359f926b (diff) | |
| download | linux-c077711f718be7cebcc8b987eac2ebfd17447e9f.tar.gz linux-c077711f718be7cebcc8b987eac2ebfd17447e9f.tar.bz2 linux-c077711f718be7cebcc8b987eac2ebfd17447e9f.zip | |
arm64: Detect if in a realm and set RIPAS RAM
Detect that the VM is a realm guest by the presence of the RSI
interface. This is done after PSCI has been initialised so that we can
check the SMCCC conduit before making any RSI calls.
If in a realm then iterate over all memory ensuring that it is marked as
RIPAS RAM. The loader is required to do this for us, however if some
memory is missed this will cause the guest to receive a hard to debug
external abort at some random point in the future. So for a
belt-and-braces approach set all memory to RIPAS RAM. Any failure here
implies that the RAM regions passed to Linux are incorrect so panic()
promptly to make the situation clear.
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Co-developed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20241017131434.40935-3-steven.price@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/setup.c')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index b22d28ec8028..b5e1e306fa51 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -43,6 +43,7 @@ #include <asm/cpu_ops.h> #include <asm/kasan.h> #include <asm/numa.h> +#include <asm/rsi.h> #include <asm/scs.h> #include <asm/sections.h> #include <asm/setup.h> @@ -351,6 +352,8 @@ void __init __no_sanitize_address setup_arch(char **cmdline_p) else psci_acpi_init(); + arm64_rsi_init(); + init_bootcpu_ops(); smp_init_cpus(); smp_build_mpidr_hash(); |