From: Vincent Donnefort <vdonnefort@google.com>
To: catalin.marinas@arm.com, will@kernel.org
Cc: mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, kernel-team@android.com,
fuad.tabba@linux.dev, Vincent Donnefort <vdonnefort@google.com>
Subject: [PATCH 5/5] drivers/virt: pkvm: Allow granule larger than PAGE_SIZE
Date: Wed, 7 Oct 2026 16:02:55 +0100 [thread overview]
Message-ID: <20261007150255.1648849-6-vdonnefort@google.com> (raw)
In-Reply-To: <20261007150255.1648849-1-vdonnefort@google.com>
Both MEM_SHARE and MMIO_GUARD now support a PAGE_SIZE smaller than the
hypervisor granule. We can relax this restriction.
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
---
drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c b/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c
index 3852be6bd16b..e3363a69a7eb 100644
--- a/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c
+++ b/drivers/virt/coco/pkvm-guest/arm-pkvm-guest.c
@@ -135,7 +135,7 @@ void __init pkvm_init_hyp_services(void)
arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_HYP_MEMINFO_FUNC_ID,
0, 0, 0, &res);
- if (res.a0 > PAGE_SIZE) /* Includes error codes */
+ if ((long)res.a0 <= 0)
return;
pkvm_granule = res.a0;
--
2.56.0.rc1.315.gc6ed9934b7-goog
next prev parent reply other threads:[~2026-10-07 15:03 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-07 15:02 [PATCH 0/5] drivers/virt: pkvm: Protected VMs with PAGE_SIZE smaller than the hypervisor granule Vincent Donnefort
2026-10-07 15:02 ` [PATCH 1/5] drivers/virt: pkvm: Make pkvm_init_hyp_services() __init Vincent Donnefort
2026-10-08 11:18 ` Fuad Tabba
2026-10-07 15:02 ` [PATCH 2/5] drivers/virt: pkvm: Make pkvm_granule __ro_after_init Vincent Donnefort
2026-10-08 11:19 ` Fuad Tabba
2026-10-07 15:02 ` [PATCH 3/5] drivers/virt: pkvm: Handle a granule larger than PAGE_SIZE for MEM_SHARE Vincent Donnefort
2026-10-07 15:02 ` [PATCH 4/5] drivers/virt: pkvm: Handle a granule larger than PAGE_SIZE for MMIO_GUARD Vincent Donnefort
2026-10-08 11:20 ` Fuad Tabba
2026-10-07 15:02 ` Vincent Donnefort [this message]
2026-10-08 11:21 ` [PATCH 5/5] drivers/virt: pkvm: Allow granule larger than PAGE_SIZE Fuad Tabba
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