diff options
Diffstat (limited to 'kernel/gsp_emulation.c')
| -rw-r--r-- | kernel/gsp_emulation.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/kernel/gsp_emulation.c b/kernel/gsp_emulation.c index 3b6f6e5..5522bf3 100644 --- a/kernel/gsp_emulation.c +++ b/kernel/gsp_emulation.c @@ -138,6 +138,32 @@ enum gsp_emu_boot_stage { }; /* + * gsp_emu_clear_boot_state - return the emulated GSP to a cold state. + * + * On real hardware, driver unload tears down WPR2 (Booter Unload) so the + * next probe's _kgspBootGspRm WPR2-up check passes. Turing guests produce + * no observable BAR0 writes on unload, so callers must trigger this on + * indirect death signals (ENGINE reset, GSP-RM queue going stale). + * Clears WPR2, RISCV active status and the falcon stage tracker, and + * drops the parsed GSP-RM queue state. + */ +void gsp_emu_clear_boot_state(struct gsp_emu_context *ctx, const char *reason) +{ + nv_vgpu_info(ctx->vgpu, "GSP-BOOT: clearing boot state (%s)", reason); + + gsp_emu_shadow_write32(ctx, GSP_EMU_REG_WPR2_ADDR_LO, 0); + gsp_emu_shadow_write32(ctx, GSP_EMU_REG_WPR2_ADDR_HI, 0); + gsp_emu_shadow_write32(ctx, GSP_EMU_REG_RISCV_STATUS, 0); + gsp_emu_shadow_write32(ctx, GSP_EMU_REG_GSP_MAILBOX0, 0); + gsp_emu_shadow_write32(ctx, GSP_EMU_REG_GSP_MAILBOX1, 0); + + ctx->boot_stage = GSP_BOOT_STAGE_IDLE; + ctx->flcn_kick_count = 0; + + gsp_rm_emu_reset(ctx); +} + +/* * gsp_emu_poll_boot - drive the guest's physical GSP boot to completion. * * The guest driver kicks falcon ucodes (FWSEC for FRTS, then Booter Load for @@ -155,12 +181,10 @@ static void gsp_emu_poll_boot(struct gsp_emu_context *ctx) /* GSP ENGINE reset asserted -> falcon rebooted, restart stage tracking */ if ((engine & 0x1) && ctx->boot_stage != GSP_BOOT_STAGE_IDLE) { - ctx->boot_stage = GSP_BOOT_STAGE_IDLE; - ctx->flcn_kick_count = 0; nv_vgpu_info(ctx->vgpu, "GSP-BOOT: falcon reset, back to IDLE"); /* The guest is rebooting the GSP (new probe or unload): the * GSP-RM queue state is stale, reset it too. */ - gsp_rm_emu_reset(ctx); + gsp_emu_clear_boot_state(ctx, "ENGINE reset"); return; } |