From patchwork Wed Oct 30 13:49:05 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Roy X-Patchwork-Id: 13856564 Received: from smtp-fw-33001.amazon.com (smtp-fw-33001.amazon.com [207.171.190.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 45AAD1E49B; Wed, 30 Oct 2024 13:50:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=207.171.190.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730296207; cv=none; b=SbOYihQwICoRU6QSe7senz2C36qmEp0g+f+LipdibqwQmJz6xToXzxbYhzmncMxR2IVXD2VWBnMgFHgf7YAdSwyl2z2vI5XaE/3HlH2bIK+ZCQDDkSzv3qRK7Q7dnGD61uPSu8IMK/WmAcCUnJ+qhes1dDbyByJBPzgsLqrgGMo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730296207; c=relaxed/simple; bh=qAhrT6/VVrlfrGy98EzyCBPEJH/TqZRDpd/8vM+VJ/o=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FbaNARyicFkQMqZj98Ey/h9MNUJGnzsnfcrqbi0PpgCdUDhfuMitCzOone16bd3WRcgIWXHybHm2Sc3KJELDeRFEckmU1Sijluq7BXMXA/CXiZSVoqEX990zf7HYi1sD3afcwk0qGLk5l3JrnPH3oOFrjLgWj0f312A/fmq2pcQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk; spf=pass smtp.mailfrom=amazon.co.uk; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b=WgRt2vP9; arc=none smtp.client-ip=207.171.190.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=amazon.co.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=amazon.co.uk header.i=@amazon.co.uk header.b="WgRt2vP9" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.co.uk; i=@amazon.co.uk; q=dns/txt; s=amazon201209; t=1730296206; x=1761832206; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=blYJo1yNoaziWCkfOsSivyw3bncyOYuZYYL2mpgphk8=; b=WgRt2vP9/rvpGzG/L/1o3Sim9ANNZYJzuo5e4geDyUgwsXLMbQ3MtdC9 c4jBMmojQ5OUagrozPAm6cY1dxz/EYry/IZQ9DhL9KdifYtzPA3HfV5Eq T0u1ea1byAK0m6jP6CgsCpnTnX3NJmpUK6HfcTjuiP6HCGHEGUC/x0Nba s=; X-IronPort-AV: E=Sophos;i="6.11,245,1725321600"; d="scan'208";a="381122622" Received: from pdx4-co-svc-p1-lb2-vlan2.amazon.com (HELO smtpout.prod.us-west-2.prod.farcaster.email.amazon.dev) ([10.25.36.210]) by smtp-border-fw-33001.sea14.amazon.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Oct 2024 13:49:59 +0000 Received: from EX19MTAEUA001.ant.amazon.com [10.0.17.79:33275] by smtpin.naws.eu-west-1.prod.farcaster.email.amazon.dev [10.0.20.52:2525] with esmtp (Farcaster) id c77b8478-8ab2-4663-a8a5-9c2518ad8ef5; Wed, 30 Oct 2024 13:49:56 +0000 (UTC) X-Farcaster-Flow-ID: c77b8478-8ab2-4663-a8a5-9c2518ad8ef5 Received: from EX19D030EUB004.ant.amazon.com (10.252.61.33) by EX19MTAEUA001.ant.amazon.com (10.252.50.192) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Wed, 30 Oct 2024 13:49:49 +0000 Received: from EX19MTAUEA002.ant.amazon.com (10.252.134.9) by EX19D030EUB004.ant.amazon.com (10.252.61.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34; Wed, 30 Oct 2024 13:49:48 +0000 Received: from email-imr-corp-prod-pdx-all-2c-8a67eb17.us-west-2.amazon.com (10.43.8.2) by mail-relay.amazon.com (10.252.134.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA) id 15.2.1258.34 via Frontend Transport; Wed, 30 Oct 2024 13:49:48 +0000 Received: from ua2d7e1a6107c5b.home (dev-dsk-roypat-1c-dbe2a224.eu-west-1.amazon.com [172.19.88.180]) by email-imr-corp-prod-pdx-all-2c-8a67eb17.us-west-2.amazon.com (Postfix) with ESMTPS id EC34C4032D; Wed, 30 Oct 2024 13:49:37 +0000 (UTC) From: Patrick Roy To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Patrick Roy Subject: [RFC PATCH v3 1/6] arch: introduce set_direct_map_valid_noflush() Date: Wed, 30 Oct 2024 13:49:05 +0000 Message-ID: <20241030134912.515725-2-roypat@amazon.co.uk> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241030134912.515725-1-roypat@amazon.co.uk> References: <20241030134912.515725-1-roypat@amazon.co.uk> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: "Mike Rapoport (Microsoft)" From: Mike Rapoport (Microsoft) Add an API that will allow updates of the direct/linear map for a set of physically contiguous pages. It will be used in the following patches. Signed-off-by: Mike Rapoport (Microsoft) Signed-off-by: Patrick Roy --- arch/arm64/include/asm/set_memory.h | 1 + arch/arm64/mm/pageattr.c | 10 ++++++++++ arch/loongarch/include/asm/set_memory.h | 1 + arch/loongarch/mm/pageattr.c | 21 +++++++++++++++++++++ arch/riscv/include/asm/set_memory.h | 1 + arch/riscv/mm/pageattr.c | 15 +++++++++++++++ arch/s390/include/asm/set_memory.h | 1 + arch/s390/mm/pageattr.c | 11 +++++++++++ arch/x86/include/asm/set_memory.h | 1 + arch/x86/mm/pat/set_memory.c | 8 ++++++++ include/linux/set_memory.h | 6 ++++++ 11 files changed, 76 insertions(+) base-commit: 5cb1659f412041e4780f2e8ee49b2e03728a2ba6 diff --git a/arch/arm64/include/asm/set_memory.h b/arch/arm64/include/asm/set_memory.h index 917761feeffdd..98088c043606a 100644 --- a/arch/arm64/include/asm/set_memory.h +++ b/arch/arm64/include/asm/set_memory.h @@ -13,6 +13,7 @@ int set_memory_valid(unsigned long addr, int numpages, int enable); int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); bool kernel_page_present(struct page *page); #endif /* _ASM_ARM64_SET_MEMORY_H */ diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c index 0e270a1c51e64..01225900293ac 100644 --- a/arch/arm64/mm/pageattr.c +++ b/arch/arm64/mm/pageattr.c @@ -192,6 +192,16 @@ int set_direct_map_default_noflush(struct page *page) PAGE_SIZE, change_page_range, &data); } +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + unsigned long addr = (unsigned long)page_address(page); + + if (!can_set_direct_map()) + return 0; + + return set_memory_valid(addr, nr, valid); +} + #ifdef CONFIG_DEBUG_PAGEALLOC void __kernel_map_pages(struct page *page, int numpages, int enable) { diff --git a/arch/loongarch/include/asm/set_memory.h b/arch/loongarch/include/asm/set_memory.h index d70505b6676cb..55dfaefd02c8a 100644 --- a/arch/loongarch/include/asm/set_memory.h +++ b/arch/loongarch/include/asm/set_memory.h @@ -17,5 +17,6 @@ int set_memory_rw(unsigned long addr, int numpages); bool kernel_page_present(struct page *page); int set_direct_map_default_noflush(struct page *page); int set_direct_map_invalid_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); #endif /* _ASM_LOONGARCH_SET_MEMORY_H */ diff --git a/arch/loongarch/mm/pageattr.c b/arch/loongarch/mm/pageattr.c index ffd8d76021d47..f14b40c968b48 100644 --- a/arch/loongarch/mm/pageattr.c +++ b/arch/loongarch/mm/pageattr.c @@ -216,3 +216,24 @@ int set_direct_map_invalid_noflush(struct page *page) return __set_memory(addr, 1, __pgprot(0), __pgprot(_PAGE_PRESENT | _PAGE_VALID)); } + +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + unsigned long addr = (unsigned long)page_address(page); + pgprot_t set, clear; + + return __set_memory((unsigned long)page_address(page), nr, set, clear); + + if (addr < vm_map_base) + return 0; + + if (valid) { + set = PAGE_KERNEL; + clear = __pgprot(0); + } else { + set = __pgprot(0); + clear = __pgprot(_PAGE_PRESENT | _PAGE_VALID); + } + + return __set_memory(addr, 1, set, clear); +} diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h index ab92fc84e1fc9..ea263d3683ef6 100644 --- a/arch/riscv/include/asm/set_memory.h +++ b/arch/riscv/include/asm/set_memory.h @@ -42,6 +42,7 @@ static inline int set_kernel_memory(char *startp, char *endp, int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); bool kernel_page_present(struct page *page); #endif /* __ASSEMBLY__ */ diff --git a/arch/riscv/mm/pageattr.c b/arch/riscv/mm/pageattr.c index 271d01a5ba4da..d815448758a19 100644 --- a/arch/riscv/mm/pageattr.c +++ b/arch/riscv/mm/pageattr.c @@ -386,6 +386,21 @@ int set_direct_map_default_noflush(struct page *page) PAGE_KERNEL, __pgprot(_PAGE_EXEC)); } +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + pgprot_t set, clear; + + if (valid) { + set = PAGE_KERNEL; + clear = __pgprot(_PAGE_EXEC); + } else { + set = __pgprot(0); + clear = __pgprot(_PAGE_PRESENT); + } + + return __set_memory((unsigned long)page_address(page), nr, set, clear); +} + #ifdef CONFIG_DEBUG_PAGEALLOC static int debug_pagealloc_set_page(pte_t *pte, unsigned long addr, void *data) { diff --git a/arch/s390/include/asm/set_memory.h b/arch/s390/include/asm/set_memory.h index 06fbabe2f66c9..240bcfbdcdcec 100644 --- a/arch/s390/include/asm/set_memory.h +++ b/arch/s390/include/asm/set_memory.h @@ -62,5 +62,6 @@ __SET_MEMORY_FUNC(set_memory_4k, SET_MEMORY_4K) int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); #endif diff --git a/arch/s390/mm/pageattr.c b/arch/s390/mm/pageattr.c index 5f805ad42d4c3..4c7ee74aa130d 100644 --- a/arch/s390/mm/pageattr.c +++ b/arch/s390/mm/pageattr.c @@ -406,6 +406,17 @@ int set_direct_map_default_noflush(struct page *page) return __set_memory((unsigned long)page_to_virt(page), 1, SET_MEMORY_DEF); } +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + unsigned long flags; + + if (valid) + flags = SET_MEMORY_DEF; + else + flags = SET_MEMORY_INV; + + return __set_memory((unsigned long)page_to_virt(page), nr, flags); +} #if defined(CONFIG_DEBUG_PAGEALLOC) || defined(CONFIG_KFENCE) static void ipte_range(pte_t *pte, unsigned long address, int nr) diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h index 4b2abce2e3e7d..cc62ef70ccc0a 100644 --- a/arch/x86/include/asm/set_memory.h +++ b/arch/x86/include/asm/set_memory.h @@ -89,6 +89,7 @@ int set_pages_rw(struct page *page, int numpages); int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid); bool kernel_page_present(struct page *page); extern int kernel_set_to_readonly; diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c index 44f7b2ea6a073..069e421c22474 100644 --- a/arch/x86/mm/pat/set_memory.c +++ b/arch/x86/mm/pat/set_memory.c @@ -2444,6 +2444,14 @@ int set_direct_map_default_noflush(struct page *page) return __set_pages_p(page, 1); } +int set_direct_map_valid_noflush(struct page *page, unsigned nr, bool valid) +{ + if (valid) + return __set_pages_p(page, nr); + + return __set_pages_np(page, nr); +} + #ifdef CONFIG_DEBUG_PAGEALLOC void __kernel_map_pages(struct page *page, int numpages, int enable) { diff --git a/include/linux/set_memory.h b/include/linux/set_memory.h index e7aec20fb44f1..3030d9245f5ac 100644 --- a/include/linux/set_memory.h +++ b/include/linux/set_memory.h @@ -34,6 +34,12 @@ static inline int set_direct_map_default_noflush(struct page *page) return 0; } +static inline int set_direct_map_valid_noflush(struct page *page, + unsigned nr, bool valid) +{ + return 0; +} + static inline bool kernel_page_present(struct page *page) { return true;