diff options
Diffstat (limited to 'kernel/gsp_phys_booter.c')
| -rw-r--r-- | kernel/gsp_phys_booter.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/kernel/gsp_phys_booter.c b/kernel/gsp_phys_booter.c index d7ba43d..ee433e1 100644 --- a/kernel/gsp_phys_booter.c +++ b/kernel/gsp_phys_booter.c @@ -15539,6 +15539,38 @@ static u64 gsp_phys_gr_pool_exhausted; /* m86: program-page override blob (see gsp-phys-gr-override). */ static u8 gsp_phys_gr_override[GSP_PHYS_PAGE_SIZE]; static u32 gsp_phys_gr_override_len; +static bool gsp_phys_gr_override_parsed; + +/* m86: parse the sticky hex override parameter once, before first use. */ +static void gsp_phys_gr_override_apply_param(void) +{ + const char *h = gsp_phys_rmcall_gr_override_hex_value(); + u32 n, i; + + if (gsp_phys_gr_override_parsed) + return; + gsp_phys_gr_override_parsed = true; + if (!h || !h[0] || READ_ONCE(gsp_phys_gr_override_len)) + return; + n = (u32)strlen(h); + if (n % 2 || n / 2 > GSP_PHYS_PAGE_SIZE) { + pr_warn("vgsp-boot: gr-override hex param ignored (bad length %u)\n", + n); + return; + } + for (i = 0; i < n; i += 2) { + unsigned int b; + + if (sscanf(h + i, "%2x", &b) != 1) { + pr_warn("vgsp-boot: gr-override hex param bad at %u\n", + i); + return; + } + gsp_phys_gr_override[i / 2] = (u8)b; + } + WRITE_ONCE(gsp_phys_gr_override_len, n / 2); + pr_info("vgsp-boot: gr-override hex param: %u bytes stored\n", n / 2); +} void gsp_phys_backend_gr_counters(u64 *submitted, u64 *ok, u64 *refused, u64 *timed_out, u64 *pool_exhausted) @@ -16114,6 +16146,7 @@ int gsp_phys_backend_guest_gr_submit(const struct gsp_phys_gr_submit *req, } gsp_phys_gr_submitted++; + gsp_phys_gr_override_apply_param(); mutex_lock(&gsp_phys_rm_lock); if (!gsp_phys_backend_gr_ready()) { mutex_unlock(&gsp_phys_rm_lock); |