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author | Christoph Hellwig <hch@lst.de> | 2022-03-29 17:27:33 +0200 |
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committer | Christoph Hellwig <hch@lst.de> | 2022-04-18 07:21:11 +0200 |
commit | c6af2aa9ffc9763826607bc2664ef3ea4475ed18 (patch) | |
tree | a317bf9fea869ed4555759c155f0a95dc9a2cd95 /arch | |
parent | a3e230926708125205ffd06d3dc2175a8263ae7e (diff) | |
download | linux-c6af2aa9ffc9763826607bc2664ef3ea4475ed18.tar.gz linux-c6af2aa9ffc9763826607bc2664ef3ea4475ed18.tar.bz2 linux-c6af2aa9ffc9763826607bc2664ef3ea4475ed18.zip |
swiotlb: make the swiotlb_init interface more useful
Pass a boolean flag to indicate if swiotlb needs to be enabled based on
the addressing needs, and replace the verbose argument with a set of
flags, including one to force enable bounce buffering.
Note that this patch removes the possibility to force xen-swiotlb use
with the swiotlb=force parameter on the command line on x86 (arm and
arm64 never supported that), but this interface will be restored shortly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/mm/init.c | 6 | ||||
-rw-r--r-- | arch/arm64/mm/init.c | 6 | ||||
-rw-r--r-- | arch/ia64/mm/init.c | 4 | ||||
-rw-r--r-- | arch/mips/cavium-octeon/dma-octeon.c | 2 | ||||
-rw-r--r-- | arch/mips/loongson64/dma.c | 2 | ||||
-rw-r--r-- | arch/mips/sibyte/common/dma.c | 2 | ||||
-rw-r--r-- | arch/powerpc/mm/mem.c | 3 | ||||
-rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 3 | ||||
-rw-r--r-- | arch/riscv/mm/init.c | 8 | ||||
-rw-r--r-- | arch/s390/mm/init.c | 3 | ||||
-rw-r--r-- | arch/x86/kernel/pci-dma.c | 15 |
11 files changed, 17 insertions, 37 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c index fe249ea91908..ce64bdb55a16 100644 --- a/arch/arm/mm/init.c +++ b/arch/arm/mm/init.c @@ -271,11 +271,7 @@ static void __init free_highpages(void) void __init mem_init(void) { #ifdef CONFIG_ARM_LPAE - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > arm_dma_pfn_limit) - swiotlb_init(1); - else - swiotlb_force = SWIOTLB_NO_FORCE; + swiotlb_init(max_pfn > arm_dma_pfn_limit, SWIOTLB_VERBOSE); #endif set_max_mapnr(pfn_to_page(max_pfn) - mem_map); diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 1e7b1550e2fc..bd4095b7fb40 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -398,11 +398,7 @@ void __init bootmem_init(void) */ void __init mem_init(void) { - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > PFN_DOWN(arm64_dma_phys_limit)) - swiotlb_init(1); - else if (!xen_swiotlb_detect()) - swiotlb_force = SWIOTLB_NO_FORCE; + swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit), SWIOTLB_VERBOSE); /* this will put all unused low memory onto the freelists */ memblock_free_all(); diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 5d165607bf35..3c3e15b22608 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -437,9 +437,7 @@ mem_init (void) if (iommu_detected) break; #endif -#ifdef CONFIG_SWIOTLB - swiotlb_init(1); -#endif + swiotlb_init(true, SWIOTLB_VERBOSE); } while (0); #ifdef CONFIG_FLATMEM diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c index fb7547e21726..9fbba6a8fa4c 100644 --- a/arch/mips/cavium-octeon/dma-octeon.c +++ b/arch/mips/cavium-octeon/dma-octeon.c @@ -235,5 +235,5 @@ void __init plat_swiotlb_setup(void) #endif swiotlb_adjust_size(swiotlbsize); - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/mips/loongson64/dma.c b/arch/mips/loongson64/dma.c index 364f2f27c872..8220a1bc0db6 100644 --- a/arch/mips/loongson64/dma.c +++ b/arch/mips/loongson64/dma.c @@ -24,5 +24,5 @@ phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) void __init plat_swiotlb_setup(void) { - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/mips/sibyte/common/dma.c b/arch/mips/sibyte/common/dma.c index eb47a94f3583..c5c2c782aff6 100644 --- a/arch/mips/sibyte/common/dma.c +++ b/arch/mips/sibyte/common/dma.c @@ -10,5 +10,5 @@ void __init plat_swiotlb_setup(void) { - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_VERBOSE); } diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index 4d221d033804..74ca516c3e7e 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -17,6 +17,7 @@ #include <linux/suspend.h> #include <linux/dma-direct.h> +#include <asm/swiotlb.h> #include <asm/machdep.h> #include <asm/rtas.h> #include <asm/kasan.h> @@ -251,7 +252,7 @@ void __init mem_init(void) if (is_secure_guest()) svm_swiotlb_init(); else - swiotlb_init(0); + swiotlb_init(ppc_swiotlb_enable, 0); #endif high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index 955ff8aa1644..0f74b2284773 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -849,9 +849,6 @@ static void __init pSeries_setup_arch(void) } ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare; - - if (swiotlb_force == SWIOTLB_FORCE) - ppc_swiotlb_enable = 1; } static void pseries_panic(char *str) diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 9535bea8688c..181ffd322eaf 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -120,13 +120,7 @@ void __init mem_init(void) BUG_ON(!mem_map); #endif /* CONFIG_FLATMEM */ -#ifdef CONFIG_SWIOTLB - if (swiotlb_force == SWIOTLB_FORCE || - max_pfn > PFN_DOWN(dma32_phys_limit)) - swiotlb_init(1); - else - swiotlb_force = SWIOTLB_NO_FORCE; -#endif + swiotlb_init(max_pfn > PFN_DOWN(dma32_phys_limit), SWIOTLB_VERBOSE); memblock_free_all(); print_vm_layout(); diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 86ffd0d51fd5..6fb6bf64326f 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -185,8 +185,7 @@ static void pv_init(void) return; /* make sure bounce buffers are shared */ - swiotlb_force = SWIOTLB_FORCE; - swiotlb_init(1); + swiotlb_init(true, SWIOTLB_FORCE | SWIOTLB_VERBOSE); swiotlb_update_mem_attributes(); } diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c index 04140e20ef1a..a705a199bf8a 100644 --- a/arch/x86/kernel/pci-dma.c +++ b/arch/x86/kernel/pci-dma.c @@ -39,6 +39,7 @@ int iommu_detected __read_mostly = 0; #ifdef CONFIG_SWIOTLB bool x86_swiotlb_enable; +static unsigned int x86_swiotlb_flags; static void __init pci_swiotlb_detect(void) { @@ -58,16 +59,16 @@ static void __init pci_swiotlb_detect(void) * bounce buffers as the hypervisor can't access arbitrary VM memory * that is not explicitly shared with it. */ - if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) - swiotlb_force = SWIOTLB_FORCE; - - if (swiotlb_force == SWIOTLB_FORCE) + if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) { x86_swiotlb_enable = true; + x86_swiotlb_flags |= SWIOTLB_FORCE; + } } #else static inline void __init pci_swiotlb_detect(void) { } +#define x86_swiotlb_flags 0 #endif /* CONFIG_SWIOTLB */ #ifdef CONFIG_SWIOTLB_XEN @@ -75,8 +76,7 @@ static bool xen_swiotlb; static void __init pci_xen_swiotlb_init(void) { - if (!xen_initial_domain() && !x86_swiotlb_enable && - swiotlb_force != SWIOTLB_FORCE) + if (!xen_initial_domain() && !x86_swiotlb_enable) return; x86_swiotlb_enable = true; xen_swiotlb = true; @@ -120,8 +120,7 @@ void __init pci_iommu_alloc(void) gart_iommu_hole_init(); amd_iommu_detect(); detect_intel_iommu(); - if (x86_swiotlb_enable) - swiotlb_init(0); + swiotlb_init(x86_swiotlb_enable, x86_swiotlb_flags); } /* |