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| author | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-22 23:41:13 -0400 |
|---|---|---|
| committer | Arthur Hanson Rasmusson <arthur@vgpu.io> | 2026-09-22 23:41:13 -0400 |
| commit | 1ed5d98cbb2273e75674d050fb48e3c3422a3877 (patch) | |
| tree | 1c840100535c0c57f266b37922fa08fad1ccedb7 /kernel | |
| parent | 14283fe73fb5e432a7af45de94961655714910f6 (diff) | |
| download | open-iov-1ed5d98cbb2273e75674d050fb48e3c3422a3877.tar.gz open-iov-1ed5d98cbb2273e75674d050fb48e3c3422a3877.zip | |
kernel: widen PCFG mirror watch to link-cap aliases (debug helper)
Logs changes to NV_PMC_BOOT_1 (0x4), the low PCFG alias, the BAR0 PCFG
block (0x880000/0x880080/0x880084/0x880088/0x88008c) and the VF-window
aliases. Observed during a CUDA run: the guest never writes any of them,
so the link-cap values we pre-set (0x103 / 0x01030000) are not clobbered.
Reads are not observable through the mmap'd BAR0.
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/gsp_emulation.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/kernel/gsp_emulation.c b/kernel/gsp_emulation.c index 969d4fd..833ce42 100644 --- a/kernel/gsp_emulation.c +++ b/kernel/gsp_emulation.c @@ -305,15 +305,24 @@ static void gsp_emu_poll_boot(struct gsp_emu_context *ctx) } } - /* Temporary: watch the PCFG link-caps mirror for guest writes */ + /* Temporary: watch PCFG / link-cap mirror offsets for guest writes */ { - static u32 last_linkcap; - u32 v = gsp_emu_shadow_read32(ctx, 0x88084); + static const u32 watch[] = { + 0x000004, 0x000084, 0x880000, 0x880004, 0x880080, + 0x880084, 0x880088, 0x88008c, 0xb80084, 0xb88084, + 0xc08084, + }; + static u32 last[ARRAY_SIZE(watch)]; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(watch); i++) { + u32 v = gsp_emu_shadow_read32(ctx, watch[i]); - if (v != last_linkcap) { - nv_vgpu_info(ctx->vgpu, "GSP-BOOT: PCFG[0x88084] = 0x%x (was 0x%x)", - v, last_linkcap); - last_linkcap = v; + if (v != last[i]) { + nv_vgpu_info(ctx->vgpu, "GSP-BOOT: PCFG[0x%x] = 0x%x (was 0x%x)", + watch[i], v, last[i]); + last[i] = v; + } } } |