From: Tianyu Lan <ltykernel@gmail•com>
To: kys@microsoft•com, haiyangz@microsoft•com,
sthemmin@microsoft•com, wei.liu@kernel•org, decui@microsoft•com,
tglx@linutronix•de, mingo@redhat•com, bp@alien8•de,
x86@kernel•org, hpa@zytor•com, dave.hansen@linux•intel.com,
luto@kernel•org, peterz@infradead•org, konrad.wilk@oracle•com,
boris.ostrovsky@oracle•com, jgross@suse•com,
sstabellini@kernel•org, joro@8bytes•org, will@kernel•org,
davem@davemloft•net, kuba@kernel•org, jejb@linux•ibm.com,
martin.petersen@oracle•com, arnd@arndb•de, hch@lst•de,
m.szyprowski@samsung•com, robin.murphy@arm•com,
Tianyu.Lan@microsoft•com, rppt@kernel•org,
kirill.shutemov@linux•intel.com, akpm@linux-foundation•org,
brijesh.singh@amd•com, thomas.lendacky@amd•com,
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ardb@kernel•org, rientjes@google•com, tj@kernel•org,
keescook@chromium•org, michael.h.kelley@microsoft•com
Cc: iommu@lists•linux-foundation.org, linux-arch@vger•kernel.org,
linux-hyperv@vger•kernel.org, linux-kernel@vger•kernel.org,
linux-scsi@vger•kernel.org, netdev@vger•kernel.org,
vkuznets@redhat•com, parri.andrea@gmail•com
Subject: [PATCH V2 03/14] x86/set_memory: Add x86_set_memory_enc static call support
Date: Wed, 4 Aug 2021 14:44:59 -0400 [thread overview]
Message-ID: <20210804184513.512888-4-ltykernel@gmail.com> (raw)
In-Reply-To: <20210804184513.512888-1-ltykernel@gmail.com>
From: Tianyu Lan <Tianyu.Lan@microsoft•com>
Hyper-V and other platforms(e.g Intel and AMD) want to override
the __set_memory_enc_dec(). Add x86_set_memory_enc static
call here and platforms can hook their implementation.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft•com>
---
arch/x86/include/asm/set_memory.h | 4 ++++
arch/x86/mm/pat/set_memory.c | 9 +++++++++
2 files changed, 13 insertions(+)
diff --git a/arch/x86/include/asm/set_memory.h b/arch/x86/include/asm/set_memory.h
index 43fa081a1adb..490f2cfc00fa 100644
--- a/arch/x86/include/asm/set_memory.h
+++ b/arch/x86/include/asm/set_memory.h
@@ -4,6 +4,7 @@
#include <asm/page.h>
#include <asm-generic/set_memory.h>
+#include <linux/static_call.h>
/*
* The set_memory_* API can be used to change various attributes of a virtual
@@ -84,6 +85,9 @@ int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
bool kernel_page_present(struct page *page);
+int dummy_set_memory_enc(unsigned long addr, int numpages, bool enc);
+DECLARE_STATIC_CALL(x86_set_memory_enc, dummy_set_memory_enc);
+
extern int kernel_set_to_readonly;
#ifdef CONFIG_X86_64
diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c
index ad8a5c586a35..68e9ab522cea 100644
--- a/arch/x86/mm/pat/set_memory.c
+++ b/arch/x86/mm/pat/set_memory.c
@@ -18,6 +18,7 @@
#include <linux/libnvdimm.h>
#include <linux/vmstat.h>
#include <linux/kernel.h>
+#include <linux/static_call.h>
#include <asm/e820/api.h>
#include <asm/processor.h>
@@ -66,6 +67,9 @@ static const int cpa_warn_level = CPA_PROTECT;
*/
static DEFINE_SPINLOCK(cpa_lock);
+static int default_set_memory_enc(unsigned long addr, int numpages, bool enc);
+DEFINE_STATIC_CALL(x86_set_memory_enc, default_set_memory_enc);
+
#define CPA_FLUSHTLB 1
#define CPA_ARRAY 2
#define CPA_PAGES_ARRAY 4
@@ -1981,6 +1985,11 @@ int set_memory_global(unsigned long addr, int numpages)
}
static int __set_memory_enc_dec(unsigned long addr, int numpages, bool enc)
+{
+ return static_call(x86_set_memory_enc)(addr, numpages, enc);
+}
+
+static int default_set_memory_enc(unsigned long addr, int numpages, bool enc)
{
struct cpa_data cpa;
int ret;
--
2.25.1
next prev parent reply other threads:[~2021-08-04 18:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-04 18:44 [PATCH V2 00/14] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-08-04 18:44 ` [PATCH V2 01/14] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-08-04 18:44 ` [PATCH V2 02/14] x86/HV: Initialize shared memory boundary in the " Tianyu Lan
2021-08-04 18:44 ` Tianyu Lan [this message]
2021-08-04 19:27 ` [PATCH V2 03/14] x86/set_memory: Add x86_set_memory_enc static call support Dave Hansen
2021-08-05 14:05 ` Tianyu Lan
2021-08-05 14:11 ` Peter Zijlstra
2021-08-05 14:23 ` Peter Zijlstra
2021-08-05 14:29 ` Dave Hansen
2021-08-05 15:51 ` Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 04/14] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 05/14] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 06/14] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 07/14] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 08/14] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 09/14] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 10/14] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Tianyu Lan
2021-08-05 15:56 ` Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 11/14] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-08-05 16:01 ` Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 12/14] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 13/14] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-08-04 18:45 ` [PATCH V2 14/14] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
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