All Realm IPA states are by default RIPAS_EMPTY, and accessing them in that state causes injection of synchronous exception. Either the loader or the guest needs to set IPA state to RIPAS_RAM before accessing it. Since a Linux guest needs all memory ready at boot [1], initialize it here.
[1] https://docs.kernel.org/arch/arm64/booting.html https://lore.kernel.org/all/20241004144307.66199-12-steven.pr...@arm.com/ Signed-off-by: Jean-Philippe Brucker <jean-phili...@linaro.org> --- v2->v3: New: the Linux guest does not initialize RIPAS itself anymore, and expects the loader to do it. --- hw/arm/boot.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/arm/boot.c b/hw/arm/boot.c index 5301d8d318..a2414b1f98 100644 --- a/hw/arm/boot.c +++ b/hw/arm/boot.c @@ -26,6 +26,7 @@ #include "qemu/config-file.h" #include "qemu/option.h" #include "qemu/units.h" +#include "kvm_arm.h" /* Kernel boot protocol is specified in the kernel docs * Documentation/arm/Booting and Documentation/arm64/booting.txt @@ -1238,6 +1239,9 @@ void arm_load_kernel(ARMCPU *cpu, MachineState *ms, struct arm_boot_info *info) info->dtb_filename = ms->dtb; info->dtb_limit = 0; + /* Mark all Realm memory as RAM */ + kvm_arm_rme_init_guest_ram(info->loader_start, info->ram_size); + /* Load the kernel. */ if (!info->kernel_filename || info->firmware_loaded) { arm_setup_firmware_boot(cpu, info); -- 2.47.0
