From: Naman Jain <namjain@linux.microsoft.com>
To: "K . Y . Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
Long Li <longli@microsoft.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Arnd Bergmann <arnd@arndb.de>, Paul Walmsley <pjw@kernel.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>,
Michael Kelley <mhklinux@outlook.com>
Cc: Marc Zyngier <maz@kernel.org>,
Timothy Hayes <timothy.hayes@arm.com>,
Lorenzo Pieralisi <lpieralisi@kernel.org>,
Sascha Bischoff <sascha.bischoff@arm.com>,
mrigendrachaubey <mrigendra.chaubey@gmail.com>,
Naman Jain <namjain@linux.microsoft.com>,
linux-hyperv@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-riscv@lists.infradead.org, vdso@mailbox.org,
ssengar@linux.microsoft.com
Subject: [PATCH v2 14/15] Drivers: hv: Add 4K page dependency in MSHV_VTL
Date: Thu, 23 Apr 2026 12:42:04 +0000 [thread overview]
Message-ID: <20260423124206.2410879-15-namjain@linux.microsoft.com> (raw)
In-Reply-To: <20260423124206.2410879-1-namjain@linux.microsoft.com>
Add a dependency on 4K page size in Kconfig of MSHV_VTL
to support any assumptions that may be present in the code.
x86 anyways supports 4K page size only, and for arm64, higher
page size support is not validated. Remove this dependency as
and when this feature is supported.
Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
---
drivers/hv/Kconfig | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 7937ac0cbd0f..115821cc535c 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -96,6 +96,11 @@ config MSHV_VTL
# MTRRs are controlled by VTL0, and are not specific to individual VTLs.
# Therefore, do not attempt to access or modify MTRRs here.
depends on !MTRR
+ # The hypervisor interface operates on 4k pages. Enforcing it here
+ # simplifies many assumptions in the mshv_vtl code.
+ # VTL0 VMs can still support higher page size in ARM64 and is not limited
+ # by this setting.
+ depends on PAGE_SIZE_4KB
select CPUMASK_OFFSTACK
select VIRT_XFER_TO_GUEST_WORK
default n
--
2.43.0
next prev parent reply other threads:[~2026-04-23 12:44 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 12:41 [PATCH v2 00/15] Add arm64 support in MSHV_VTL Naman Jain
2026-04-23 12:41 ` [PATCH v2 01/15] arm64: smp: Export arch_smp_send_reschedule for mshv_vtl module Naman Jain
2026-04-23 12:41 ` [PATCH v2 02/15] Drivers: hv: Move hv_vp_assist_page to common files Naman Jain
2026-04-23 12:41 ` [PATCH v2 03/15] Drivers: hv: Move vmbus_handler to common code Naman Jain
2026-04-23 12:41 ` [PATCH v2 04/15] mshv_vtl: Refactor the driver for ARM64 support to be added Naman Jain
2026-04-23 12:41 ` [PATCH v2 05/15] Drivers: hv: Export vmbus_interrupt for mshv_vtl module Naman Jain
2026-04-23 12:41 ` [PATCH v2 06/15] mshv_vtl: Make sint vector architecture neutral Naman Jain
2026-04-23 12:41 ` [PATCH v2 07/15] arm64: hyperv: Add support for mshv_vtl_return_call Naman Jain
2026-04-23 13:56 ` Mark Rutland
2026-04-23 14:00 ` Marc Zyngier
2026-04-23 12:41 ` [PATCH v2 08/15] Drivers: hv: Move hv_call_(get|set)_vp_registers() declarations Naman Jain
2026-04-23 12:41 ` [PATCH v2 09/15] Drivers: hv: mshv_vtl: Move hv_vtl_configure_reg_page() to x86 Naman Jain
2026-04-23 12:42 ` [PATCH v2 10/15] arm64: hyperv: Add hv_vtl_configure_reg_page() stub Naman Jain
2026-04-23 12:42 ` [PATCH v2 11/15] mshv_vtl: Let userspace do VSM configuration Naman Jain
2026-04-23 12:42 ` [PATCH v2 12/15] mshv_vtl: Move VSM code page offset logic to x86 files Naman Jain
2026-04-23 12:42 ` [PATCH v2 13/15] mshv_vtl: Add remaining support for arm64 Naman Jain
2026-04-23 12:42 ` Naman Jain [this message]
2026-04-23 12:42 ` [PATCH v2 15/15] Drivers: hv: Add ARM64 support for MSHV_VTL in Kconfig Naman Jain
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