From: Giacomo Mazzola <gmazz@amazon.de>
To: <kvm@vger.kernel.org>
Cc: Giacomo Mazzola <gmazz@amazon.de>
Subject: [kvm-unit-tests PATCH v2 1/8] x86: efi: use PER_CPU_SIZE for per-CPU stack allocation
Date: Tue, 20 Oct 2026 15:25:18 +0000 [thread overview]
Message-ID: <20261020152525.57694-2-gmazz@amazon.de> (raw)
In-Reply-To: <20261020152525.57694-1-gmazz@amazon.de>
The EFI startup code reserves PAGE_SIZE (4 KiB) per-CPU stacks, but
the non-EFI path (cstart64.S) uses PER_CPU_SIZE (12 KiB). The smaller
EFI stack causes stack overflows. Make the two paths consistent.
Signed-off-by: Giacomo Mazzola <gmazz@amazon.de>
---
x86/efi/efistart64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/x86/efi/efistart64.S b/x86/efi/efistart64.S
index 6025dc2f..0f9f23d9 100644
--- a/x86/efi/efistart64.S
+++ b/x86/efi/efistart64.S
@@ -8,7 +8,7 @@
/* Reserve stack in .data */
.data
.align PAGE_SIZE
- . = . + PAGE_SIZE * MAX_TEST_CPUS
+ . = . + PER_CPU_SIZE * MAX_TEST_CPUS
.globl stacktop
stacktop:
--
2.47.3
next prev parent reply other threads:[~2026-10-20 15:26 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-20 15:25 [kvm-unit-tests PATCH v2 0/8] x86: fixes for running KUT as EFI on non-QEMU KVM hosts Giacomo Mazzola
2026-10-20 15:25 ` Giacomo Mazzola [this message]
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 2/8] x86: fix EFI memory allocator to clamp regions to 4 GiB Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 3/8] x86: skip PMU init when no PMU is advertised Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 4/8] x86: fix ISR thunk to use absolute indirect jump Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 5/8] x86: replace per-AP bringup prints with a single summary line Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 6/8] x86: add timeout-based SMP bringup when fw_cfg is unavailable Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 7/8] efi: fix load_options_size conversion to character count Giacomo Mazzola
2026-10-20 15:25 ` [kvm-unit-tests PATCH v2 8/8] lib: parse KUT_ENV= from command line into environ Giacomo Mazzola
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